阅读说明：本技术 一种基于磁力的机械式静态推靠式自动垂直钻井纠斜钻具 (Mechanical static pushing type automatic vertical drilling deviation correcting drilling tool based on magnetic force ) 是由 李沼萱 贾宇航 潘一 杨双春 程涣杰 孔祥慧 于 2021-09-13 设计创作，主要内容包括：本发明涉及的是一种基于磁力的机械式静态推靠式自动垂直钻井纠斜钻具,它包括静态井筒、内钻柱、钻头,静态井筒设置钻井液分流区域、推靠装置区域、钻井液收集装置；钻井液分流区域位于推靠装置区域上方,推靠装置区域下方设置钻井液收集装置,内钻柱从上而下自中心穿过钻井液分流区域的内钻柱孔、推靠装置区域的内钻柱孔、钻井液收集装置并与钻头刚性连接,内钻柱与钻井液分流区域的内钻柱孔、推靠装置区域的内钻柱孔、钻井液收集装置连接处均设有转轴,内钻柱自转时带动钻头一起旋转。当发生井斜时,推靠装置区域可伸出推靠板作用在井眼高边井壁上,直到井斜校正后才复位。本发明可有效解决钻井防斜、纠斜问题,提高直井钻井效率。(The invention relates to a mechanical static pushing type automatic vertical drilling deviation rectifying drilling tool based on magnetic force, which comprises a static shaft, an inner drilling column and a drill bit, wherein the static shaft is provided with a drilling fluid diversion area, a pushing device area and a drilling fluid collecting device; the drilling fluid shunting area is positioned above the pushing device area, the drilling fluid collecting device is arranged below the pushing device area, the inner drill column penetrates through an inner drill column hole of the drilling fluid shunting area, the inner drill column hole of the pushing device area and the drilling fluid collecting device from top to bottom from the center and is rigidly connected with a drill bit, rotating shafts are arranged at the joints of the inner drill column, the inner drill column hole of the drilling fluid shunting area, the inner drill column hole of the pushing device area and the drilling fluid collecting device, and the drill bit is driven to rotate together when the inner drill column rotates. When a well deviation occurs, the pushing device area can extend out of the pushing plate to act on the wall of the high side well of the well, and the pushing plate can not reset until the well deviation is corrected. The invention can effectively solve the problems of inclination prevention and inclination correction of the well drilling and improve the well drilling efficiency of the vertical well.)

1. The utility model provides an automatic vertical drilling of mechanical type static leaning on formula drilling tool of rectifying a deviation which based on magnetic force which characterized in that: the mechanical static pushing type automatic vertical drilling deviation rectifying drilling tool based on the magnetic force comprises a static shaft (80), an inner drilling string (11) and a drill bit (43), wherein the static shaft (80) is provided with a drilling fluid diversion area (1), a pushing device area (2) and a drilling fluid collecting device (42); the drilling fluid diversion area (1) is located above the pushing device area (2), a drilling fluid collecting device (42) is arranged below the pushing device area (2), an inner drill string (11) penetrates through an inner drill string hole of the drilling fluid diversion area (1), the inner drill string hole of the pushing device area (2) and the drilling fluid collecting device (42) from top to bottom from the center and is rigidly connected with a drill bit (43), rotating shafts (14) are arranged at the joints of the inner drill string (11) and the inner drill string hole of the drilling fluid diversion area (1), the inner drill string hole of the pushing device area (2) and the drilling fluid collecting device (42), and the drill bit (43) is driven to rotate together when the inner drill string (11) rotates automatically;

drilling fluid flow distribution plates (3), sliding rail flow distribution drilling fluid platforms (5) and eccentric weight sliding plate flow distribution drilling fluid platforms (6) are arranged in a drilling fluid flow distribution area (1) at intervals from top to bottom, pushing device area upper sealing plates (40) and pushing device platforms (41) are arranged in a pushing device area (2) at intervals from top to bottom, and overflowing holes (13) are uniformly formed in the drilling fluid flow distribution plates (3), the sliding rail flow distribution drilling fluid platforms (5), the eccentric weight sliding plate flow distribution drilling fluid platforms (6), the pushing device area upper sealing plates (40) and the pushing device platforms in the circumferential direction; the overflowing holes of the drilling fluid shunting plate (3) and the sliding rail shunting drilling fluid platform (5) are connected through a flexible hose (8), and the overflowing holes of the sliding rail shunting drilling fluid platform (5) and the overflowing holes of the heavy sliding plate shunting drilling fluid platform (6) are connected through an overflowing pipe (10); the overflowing holes of the eccentric weight sliding plate shunt drilling fluid platform (6) and the overflowing holes of the upper sealing plate (40) of the pushing device area are also connected through an overflowing pipe (10);

the drilling fluid diversion area (1) is provided with a self-weight drilling fluid diversion platform (4), the self-weight drilling fluid diversion platform (4) is arranged between a drilling fluid diversion plate (3) and a sliding rail diversion drilling fluid platform (5) and is fixed through a balance steel cable (7), the self-weight drilling fluid diversion platform (4) is connected with each flexible hose (8) through each diversion plate (16), the balance steel cable (7) is arranged between the drilling fluid diversion plate (3) and the upper end face of each diversion plate (16), a sliding rail plate push-pull rod (9) is arranged between the lower end face of each diversion plate (16) and the gravity sliding plate diversion drilling fluid platform (6), the balance steel cables (7) correspond to the sliding rail plate push-pull rods (9) one by one, and each flexible hose is circularly wound outside each balance steel cable; one end of each sliding rail plate push-pull rod (9) is connected with a sliding rail plate push-pull rod connecting port (17) of the guide plate, the other end of each sliding rail plate push-pull rod passes through a sliding rail plate push-pull rod moving area of an upper sealing plate (21) of the sliding rail shunt drilling fluid platform and is connected with a sliding rail plate push-pull rod connecting port (17) of a sliding rail baffle plate in the sliding rail shunt drilling fluid device, and the connecting parts of the two ends of each sliding rail plate push-pull rod are fixed at a fixed shaft center hole (19) by using a fixed shaft center (20); an upper sealing plate (25) of the eccentric weight sliding plate shunt drilling fluid platform is connected with an eccentric weight sliding plate device (26) below the upper sealing plate, the eccentric weight sliding plate device (26) comprises a platform (36) with an eccentric weight sliding plate, an eccentric weight sliding plate (27) and a telescopic sliding rail (28), a port of a movable inner rail of the telescopic sliding rail (28), which is close to a sealing cover, is fixedly connected with the inner end of the eccentric weight sliding plate, a port of a fixed outer rail of the telescopic sliding rail (28), which is far away from the sealing cover, is fixedly connected with the center of the platform with the eccentric weight sliding plate, a sealing cover (34) is fixedly connected with a fixed outer rail (32), and a pressurizing and draining hole end of the eccentric weight sliding plate (27) is adjacent to an overflowing hole of the platform (36) with the eccentric weight sliding plate;

the pushing device area (2) comprises pushing device area upper sealing plates (40) and pushing device platforms (44), a pushing device (45) is arranged on each pushing device area upper sealing plate corresponding to an overflowing hole on each pushing device area on each pushing device platform (44), each pushing device (45) comprises a telescopic arc-shaped pushing device-N magnet (47), a magnetic isolation device (48) with an N magnetic plate, a current-passing telescopic pushing device-N magnet (49), a magnetic isolation device (50) with an S magnetic plate, a telescopic pushing device-N magnet (51) and a telescopic supporting device (52), each telescopic arc-shaped pushing device-N magnet (47) comprises a limiting outer sliding rail (54) and a limiting outer sliding rail end fixing area (72), the limiting outer sliding rail end fixing area (72) is arranged on each pushing device platform (44), and the limiting outer sliding rail end is fixed on the limiting outer sliding rail end fixing area at the upper end of each pushing device bottom platform, an N-magnetic push plate (53) is arranged in the limiting outer sliding rail (54), a spring (35) is arranged between the N-magnetic push plate (53) and the limiting outer sliding rail (54), the N-magnetic push plate (53) can extend out or retract from the limiting outer sliding rail, and when the N-magnetic push plate (53) extends out, the extending end of the N-magnetic push plate extends into a fixing area (69) at the top end of the limiting outer sliding rail of the three-way connecting wall (46); the three-side connecting wall (46) is placed at a three-side connecting wall fixing area (75) of a pushing device platform (44), the three-side connecting wall (46) comprises a magnetic isolation device (48) with an N magnetic plate, a telescopic pushing device-N magnetic (49) capable of overflowing and stretching and a magnetic isolation device (50) with an S magnetic plate, telescopic supporting devices (52) are arranged below the magnetic isolation device (48) with the N magnetic plate and the magnetic isolation device (50) with the S magnetic plate, limiting outer sliding rails of the two telescopic supporting devices (52) are respectively placed in a telescopic supporting device placing area (73) of the pushing device platform (44), and telescopic supporting device interfaces (58) with the magnetic isolation device (48) with the N magnetic plate and the magnetic isolation device (50) with the S magnetic plate are connected with supporting inner rails (68) of the telescopic supporting devices (52); the fixing hole of the N magnetic carrier in the N magnetic of the over-current telescopic pushing device is connected with the N magnetic carrier supporting column on the pushing device platform, a supporting platform is arranged at the over-current hole of the pushing device platform (44), and the N magnetic carrier supporting column (74) is fixed on the supporting platform; the tail end of an N magnetic backup plate sliding rail placed in the telescopic backup device-N magnet (51) is connected with a fixing area for placing the tail end of the N magnetic backup plate sliding rail of the three-party connecting wall (46), and the top end of the N magnetic backup plate sliding rail, namely the extending end of the N magnetic backup plate, is placed at the telescopic area of the N magnetic backup plate of the static shaft; the pushing device platform (44) is connected with a pushing device lower sealing plate (76) below the pushing device platform, and a drill bit (43) is externally connected to a drill bit connecting area of a drilling fluid collecting platform upper sealing plate (77) and a drilling fluid collecting platform (79) in the drilling fluid collecting device (42);

the drilling fluid flow distribution plate (3), the sliding rail flow distribution drilling fluid platform (5), the unbalanced sliding plate flow distribution drilling fluid platform (6) in the drilling fluid flow distribution area, and the upper sealing plate, the pushing device area and the drilling fluid collecting device (42) of the pushing device platform in the pushing device area are fixedly connected with the inner wall of the static shaft;

when well deviation occurs, the pushing device area (2) extends out of the N magnetic pushing plate to act on the high side well wall of the well bore, and the N magnetic pushing plate is not reset until the well deviation is corrected.

2. The magnetic force-based mechanical static push-against type automatic vertical drilling deviation rectifying drilling tool as claimed in claim 1, wherein: the two ends of the sliding rail plate push-pull rod (9) are arc-shaped, the two ends of the sliding rail plate push-pull rod are fixed at a fixed shaft center hole (19) by a fixed shaft center (20) at a sliding rail plate push-pull rod connecting port (17), and when a well is inclined, the sliding rail plate push-pull rod (9) deflects to drive a sliding rail baffle (24) to move; the initial positions of the slide rail baffles cover half spaces of the corresponding overflowing holes, and when the slide rail baffles (24) move, the shunt of the drilling fluid at the high side of the well is increased, the shunt of the drilling fluid at the low side of the well is reduced, and the re-shunt of the drilling fluid is completed.

3. The magnetic force-based mechanical static push-against type automatic vertical drilling deviation rectifying drilling tool according to claim 2, characterized in that: the telescopic sliding rail (28) is internally provided with a spring which is arranged on the movable inner rail (33), and the spring pulls back the heavy sliding plate in the well deviation correction process and after the well deviation correction is finished.

4. The magnetic force-based mechanical static push-against type automatic vertical drilling deviation rectifying drilling tool as claimed in claim 3, wherein: the weight-biased sliding plate (27) is provided with a weight-biased rotating shaft (29), the end of the weight-biased rotating shaft (29) close to the pressurizing and discharging hole is a light block, and the end far away from the pressurizing and discharging hole is a weight-biased block; rubber stoppers (30) are arranged above the weight-biased rotating shaft light block and below the weight-biased block; the platform with the eccentric weight sliding plate is provided with an eccentric weight rotating shaft deflection area, and an overflowing hole of an upper sealing plate (25) of the eccentric weight sliding plate shunt drilling fluid platform is provided with a square opening, so that a light block and an eccentric weight of the eccentric weight rotating shaft have enough deflection space; the platform (36) with the weight bias sliding plate is provided with a clamping rotating shaft (38), the clamping rotating shaft (38) is positioned below the weight bias sliding plate (27), and when the weight bias sliding plate with the weight bias rotating shaft (29) deflected clockwise is pulled back, the weight bias is contacted with the clamping rotating shaft to play a clamping role together.

5. The magnetic force-based mechanical static push-against type automatic vertical drilling deviation rectifying drilling tool according to claim 4, characterized in that: the inner drill column hole (12) of the self-weight drilling fluid diversion platform (4) is an inclined hole, the diameter of the inclined hole is far larger than that of the inner drill column, and the inner drill column has enough inclined space when well deviation occurs.

6. The magnetic force-based mechanical static push-against type automatic vertical drilling deviation rectifying drilling tool as claimed in claim 5, wherein: the number of the telescopic arc pushing devices-N magnets (47) is 3, and the telescopic arc pushing devices-N magnets are arranged according to a delta shape, so that a triangular structure is formed when an N-magnet push plate (53) acts on a sliding push plate-N magnet of the overcurrent telescopic pushing device-N magnet; a spring inside the N magnetic (47) is used for extending and retracting the N magnetic push plate; the extending end of the N magnetic push plate (53) is provided with an arc-shaped surface, the direction of the arc-shaped surface is downward, and the N magnetic push plate can be stably pushed back to reset under the action of the reset roller and the N magnetic plate in the magnetic isolation device with the N magnetic plate.

7. The magnetic force-based mechanical static push-against type automatic vertical drilling deviation rectifying drilling tool according to claim 6, characterized in that: the N-magnetic-plate-carrying magnetic isolation device (48) comprises an N magnetic plate (57), a magnetic isolation plate (56) and a reset roller (55), wherein the N magnetic plate (57) is embedded in the groove-shaped frame, the reset roller (55) is arranged at the upper end opening of the groove-shaped frame, the magnetic isolation plate (56) is arranged between the N magnetic plate (57) and the reset roller (55), and a telescopic supporting device interface (58) is arranged on the bottom surface of the lower frame wall of the groove-shaped frame.

8. The magnetic force-based mechanical static push-against type automatic vertical drilling deviation rectifying drilling tool according to claim 7, characterized in that: the N magnet (49) comprises an N magnet carrier (59) and a sliding push plate-N magnet (60), the N magnet carrier (59) is a track groove, the inner bottom surface of the track groove is provided with a moving groove and a discharge hole (61), the outer bottom surface of the track groove is provided with a plurality of fixing holes, each fixing hole is arranged in a cross shape, the N magnet carrier is connected with an N magnet carrier supporting column (74) through the fixing hole in the outer bottom surface, the sliding push plate-N magnet is just placed in the N magnet carrier, the sliding push plate-N magnet (60) is in sliding connection with the moving groove, the sliding push plate-N magnet (60) is provided with an arc-shaped surface, the direction of the arc-shaped surface is downward, and the sliding push plate-N magnet used for extending out is stably pushed back to reset under the action of a reset roller in the S magnet plate magnetism isolating device; the N magnetic pushing and leaning plate is used for magnetically acting on the extended sliding push plate-N when the well deviation correction is completed and the N magnetic pushing and leaning plate is reset, so that the sliding push plate-N is magnetically recovered for a certain distance.

9. The magnetic force-based mechanical static push-against type automatic vertical drilling deviation rectifying drilling tool according to claim 8, characterized in that: the magnetic isolation device (50) with the S magnetic plate comprises the S magnetic plate (65), the magnetic isolation plate (56) and a reset roller (55), the S magnetic plate is embedded in the groove-shaped frame, the reset roller is arranged at the upper port of the groove-shaped frame, the magnetic isolation plate is arranged between the S magnetic plate (65) and the reset roller (55), and the bottom surface of the lower frame wall of the groove-shaped frame is also provided with a telescopic supporting device interface (58).

10. The magnetic force-based mechanical static push-against automatic vertical drilling deviation rectifying drilling tool according to claim 9, characterized in that: the telescopic supporting device (52) comprises a limiting outer sliding rail (54), a supporting inner rail (68) and a spring, the limiting outer sliding rail (54) is a box-shaped body with an open end, the supporting inner rail (68) is located in the limiting outer sliding rail and is in sliding connection with the limiting outer sliding rail (54), and the limiting outer sliding rail (54) and the supporting inner rail (68) are provided with the spring to enable the supporting inner rail to stretch.

The technical field is as follows:

the invention relates to the field of petroleum drilling engineering, in particular to a mechanical static pushing type automatic vertical drilling deviation rectifying drilling tool based on magnetic force.

Background art:

in the process of vertical drilling, as the drilling depth is continuously deepened, the underground structure is more complex, well deviation occurs due to the reasons of stratum inclination angle, layered structure, anisotropy, alternation of soft and hard stratums, fault and the like, the well deviation is always an important factor for restricting the drilling speed and the drilling quality, the outstanding well deviation problem not only causes low mechanical drilling speed, delays the drilling time, increases the drilling cost, increases the drilling difficulty and causes serious accidents, but also directly affects the well cementation quality, affects the underground layered mining and water injection work, causes abrasion and breakage of an oil pipe and an oil pushing rod and the like, and becomes a direct factor for hindering the drilling construction.

The automatic vertical drilling technology is a vertical well operation technology which utilizes an underground drilling tool device to automatically prevent deviation and correct deviation, and through years of development, the automatic vertical drilling deviation correcting drilling tool can automatically prevent deviation and correct deviation by utilizing the self structure in the drilling process of a complex stratum, so that the problem of deviation of a well is effectively solved. However, the existing deviation rectifying drilling system is very expensive, and electronic devices are not high-temperature resistant, are easy to damage and have poor reliability. How to make the drilling tool more reliable in the drilling process of a vertical well, and reducing the cost while reducing the accident rate is a problem which is urgently needed to be solved at present.

The invention content is as follows:

the invention aims to provide a mechanical static pushing type automatic vertical drilling deviation rectifying drilling tool based on magnetic force, which is used for solving the problems that the existing automatic vertical drilling deviation rectifying drilling system is very expensive, and electronic devices are not high-temperature resistant, are easy to damage and have poor reliability.

The technical scheme adopted by the invention for solving the technical problems is as follows: the mechanical static pushing type automatic vertical drilling deviation rectifying drilling tool based on the magnetic force comprises a static shaft, an inner drilling column and a drill bit, wherein the static shaft is provided with a drilling fluid diversion area, a pushing device area and a drilling fluid collecting device; the drilling fluid shunting area is positioned above the pushing device area, a drilling fluid collecting device is arranged below the pushing device area, an inner drilling string passes through an inner drilling string hole of the drilling fluid shunting area, the inner drilling string hole of the pushing device area and the drilling fluid collecting device from top to bottom from the center and is rigidly connected with a drill bit, rotating shafts are arranged at the joints of the inner drilling string, the inner drilling string hole of the drilling fluid shunting area, the inner drilling string hole of the pushing device area and the drilling fluid collecting device, and the drill bit is driven to rotate together when the inner drilling string rotates;

the drilling fluid diversion area is provided with a drilling fluid diversion plate, a sliding rail diversion drilling fluid platform and a bias weight sliding plate diversion drilling fluid platform at intervals from top to bottom, the pushing device area is provided with a pushing device area upper sealing plate and a pushing device platform at intervals from top to bottom, and the drilling fluid diversion plate, the sliding rail diversion drilling fluid platform, the bias weight sliding plate diversion drilling fluid platform, the pushing device area upper sealing plate and the pushing device platform are all uniformly provided with overflowing holes along the circumferential direction; the overflow holes of the drilling fluid shunt plate and the overflow holes of the sliding rail shunt drilling fluid platform are connected through flexible hoses, and the overflow holes of the sliding rail shunt drilling fluid platform and the overflow holes of the heavy sliding plate shunt drilling fluid platform are connected through overflow pipes; the overflowing holes of the diversion drilling fluid platform of the unbalanced weight sliding plate and the overflowing holes of the upper sealing plate of the pushing device area are also connected through overflowing pipes;

the drilling fluid diversion area is provided with a self-weight drilling fluid diversion platform, the self-weight drilling fluid diversion platform is arranged between the drilling fluid diversion plate and the sliding rail diversion drilling fluid platform and is fixed through a balance steel cable, the self-weight drilling fluid diversion platform is connected with each flexible pipe through each diversion plate, the balance steel cable is arranged between the drilling fluid diversion plate and the upper end surface of each diversion plate, a sliding rail plate push-pull rod is arranged between the lower end surface of each diversion plate and the gravity sliding plate diversion drilling fluid platform, the balance steel cables correspond to the sliding rail plate push-pull rods one by one, and each flexible pipe is encircled outside each balance steel cable in a circle; one end of each sliding rail plate push-pull rod is connected with a connecting port of the sliding rail plate push-pull rod of the guide plate, the other end of each sliding rail plate push-pull rod penetrates through a sliding rail plate push-pull rod moving area of an upper sealing plate of the sliding rail shunt drilling fluid platform and is connected with a connecting port of the sliding rail plate push-pull rod of a sliding rail baffle plate in the sliding rail shunt drilling fluid device, and the connecting positions of the two ends of each sliding rail plate push-pull rod are fixed at the fixed axis hole by using a fixed axis; the upper sealing plate of the diversion drilling fluid platform of the eccentric weight sliding plate is connected with the device with the eccentric weight sliding plate below the upper sealing plate, the device with the eccentric weight sliding plate comprises a platform with the eccentric weight sliding plate, an eccentric weight sliding plate and a telescopic slide rail, the port of the movable inner rail of the telescopic slide rail, which is close to the sealing cover, is fixedly connected with the inner end of the eccentric weight sliding plate, the port of the fixed outer rail of the telescopic slide rail, which is far away from the sealing cover, is fixedly connected with the center of the platform with the eccentric weight sliding plate, the sealing cover is fixedly connected with the fixed outer rail, and the pressurizing and discharging hole end of the eccentric weight sliding plate is adjacent to the overflowing hole of the platform with the eccentric weight sliding plate;

the area of the pushing device comprises pushing device area upper sealing plates and pushing device platforms, a pushing device is arranged on each pushing device platform corresponding to the overflowing hole of each pushing device area upper sealing plate, the pushing device comprises a telescopic arc pushing device-N magnet, a magnetic isolation device with an N magnetic plate, a N magnetic isolation device capable of overflowing and stretching pushing device-N magnet, a magnetic isolation device with an S magnetic plate, a telescopic pushing device-N magnet and a telescopic supporting device, the telescopic arc pushing device-N magnet comprises a limiting outer sliding rail and a limiting outer sliding rail end fixing area, the limiting outer sliding rail end fixing area is arranged on the pushing device platform, the limiting outer sliding rail end is fixed on the limiting outer sliding rail end fixing area at the upper end of a pushing device base table, an N magnetic pushing plate is arranged in the limiting outer sliding rail, a spring is arranged between the N magnetic pushing plate and the limiting outer sliding rail, and the N magnetic pushing plate can extend out or retract from the limiting outer sliding rail, when the N magnetic push plate extends out, the extending end of the N magnetic push plate extends into a fixing area at the top end of the limiting outer sliding rail of the three-side connecting wall; the three-party connecting wall is placed at a fixing area of the three-party connecting wall of the pushing device platform, the three-party connecting wall comprises a magnetic isolation device with an N magnetic plate, a flexible pushing device capable of overflowing, an N magnetic isolation device and a magnetic isolation device with an S magnetic plate, flexible supporting devices are arranged below the magnetic isolation device with the N magnetic plate and the magnetic isolation device with the S magnetic plate, limiting outer slide rails of the two flexible supporting devices are respectively placed in flexible supporting device placing areas of the pushing device platform, and flexible supporting device interfaces with the magnetic isolation device with the N magnetic plate and the magnetic isolation device with the S magnetic plate are connected with supporting inner rails of the flexible supporting devices; the N magnetic carrier fixing hole in the N magnetic carrier of the telescopic pushing device capable of overflowing is connected with the N magnetic carrier supporting column on the pushing device platform, a supporting platform is arranged at the overflowing hole of the pushing device platform, and the N magnetic carrier supporting column is fixed on the supporting platform; the tail end of an N magnetic backup plate sliding rail placed in the N magnetic backup device is connected with a tail end fixing area of the N magnetic backup plate sliding rail placed on the three-party connecting wall, and the top end of the N magnetic backup plate sliding rail, namely the extending end of the N magnetic backup plate, is placed at the N magnetic backup plate telescopic area of the static shaft; the pushing device platform is connected with a pushing device lower sealing plate below the pushing device platform, and a drilling fluid collecting device is externally connected with a drill bit at a drill bit connecting area of a drilling fluid collecting platform upper sealing plate and a drilling fluid collecting platform;

the drilling fluid flow distribution plate, the sliding rail flow distribution drilling fluid platform, the unbalanced sliding plate flow distribution drilling fluid platform in the drilling fluid flow distribution area, and the upper sealing plate, the pushing device area and the drilling fluid collecting device of the pushing device platform in the pushing device area are all fixedly connected with the inner wall of the static shaft;

when a well deviation occurs, the pushing device area can extend out of the N magnetic pushing plate to act on the high side well wall of the well, and the N magnetic pushing plate can not reset until the well deviation is corrected.

In the scheme, two ends of the sliding rod of the sliding rail plate block are arc-shaped, and the two ends are fixed at the connecting opening of the sliding rod of the sliding rail plate block by using the fixed axis at the fixed axis hole, so that the sliding rod of the sliding rail plate block can deflect to drive the sliding rail baffle to move when the well is inclined; the initial position of the slide rail baffle covers half space of the corresponding overflowing hole, so that when well deviation occurs and the slide rail baffle moves, the shunt of the drilling fluid at the high side of the well is increased, the shunt of the drilling fluid at the low side of the well is reduced, and the re-shunt of the drilling fluid is completed.

The inside spring that has of scalable slide rail among the above-mentioned scheme, the spring sets up on removing the inner rail, can guarantee that well deviation rectifies the in-process and well deviation rectifies and accomplish the back spring and pull back the partial weight slide.

In the scheme, the eccentric weight rotating shaft is arranged on the eccentric weight sliding plate, the end, close to the pressurizing and drainage hole, of the eccentric weight rotating shaft is a light block, and the end, far away from the pressurizing and drainage hole, of the eccentric weight rotating shaft is an eccentric weight, so that when well deviation occurs, when the sliding distance of the eccentric weight sliding plate on the lower side of a well hole reaches the limit, only the light block part can be still washed by the drilling fluid, the eccentric weight cannot be washed by the drilling fluid, and the shunting of the drilling fluid is completed; rubber stoppers are arranged above the light weight block of the weight rotating shaft and below the weight, so that the weight rotating shaft can be ensured to stop deflecting after deflecting to a certain angle, and meanwhile, the damage to the light weight block and the weight is reduced; the platform with the eccentric weight sliding plate is provided with an eccentric weight rotating shaft deflection area, and the overflowing hole of the sealing plate on the eccentric weight sliding plate shunt drilling fluid platform is provided with a square opening, so that a light block and an eccentric weight of the eccentric weight rotating shaft can be ensured to have enough deflection space; have the buckle pivot on the area unbalance loading slide platform, the buckle pivot is located below the unbalance loading slide, and when the unbalance loading slide that clockwise deflection took place for the unbalance loading pivot was pulled back, the contact of unbalance loading piece and buckle pivot, the joint play buckle effect, the buckle pivot can be guaranteed: the friction force when the weight slide plate slides out and is retracted is reduced; in the process of correcting the well deviation, when the weight deviation sliding plate with the weight deviation rotating shaft deflected clockwise is pulled back, the weight deviation is contacted with the buckle rotating shaft to play a buckle effect together, so that the weight deviation sliding plate is stopped after being pulled back for a certain distance, the flow rate of the drilling fluid at the low side of the well bore is stably reduced, the flow rate of the drilling fluid at the high side of the well bore is improved, and the deviation correcting efficiency is improved; in the well deviation correcting process, when the heavy slide plate extends out for the second time, the friction between the heavy block playing a role of the buckle and the buckle rotating shaft is reduced.

In the scheme, the inner drill column hole of the self-weight drilling fluid diversion platform is an inclined hole, the diameter of the inclined hole is far larger than that of the inner drill column, and the inner drill column has enough inclined space when the well is inclined and the drilling tool is integrally inclined.

In the scheme, the number of the telescopic arc pushing devices N is 3, and the N magnetic pushing devices are arranged according to a delta shape, so that a triangular structure is formed when the N magnetic pushing plate acts on a sliding pushing plate of the overcurrent telescopic pushing device N magnetic, namely the N magnetic pushing plate N, and the structure is more stable; a spring in the N magnet is used for extending and retracting the N magnetic push plate; the N magnetic pushing plate extends out the end and has the arcwall face, and the arcwall face orientation is down for N magnetic pushing plate can be stably pushed back and reset under the effect of reset roller and N magnetic sheet in taking N magnetic sheet magnetism isolating device.

The N magnetic plate magnetism isolating device comprises the N magnetic plate, the magnetism isolating plate and the reset rolling shaft, the N magnetic plate is embedded in the groove-shaped frame, the reset rolling shaft is arranged at the upper port of the groove-shaped frame, the magnetism isolating plate is arranged between the N magnetic plate and the reset rolling shaft, and the bottom surface of the lower frame wall of the groove-shaped frame is provided with the telescopic supporting device interface.

The N magnet of the telescopic pushing device capable of overflowing comprises an N magnetic carrier and a sliding push plate-N magnet, wherein the N magnetic carrier is a track groove, the inner bottom surface of the track groove is provided with a moving groove and a discharge hole, the outer bottom surface of the track groove is provided with a plurality of fixing holes, each fixing hole is arranged in a cross shape, the N magnetic carrier is connected with an N magnetic carrier support column through the fixing hole on the outer bottom surface, the sliding push plate-N magnet is just placed in the N magnetic carrier, the sliding push plate-N magnet is connected with the moving groove in a sliding mode, the sliding push plate-N magnet is provided with an arc-shaped surface, the direction of the arc-shaped surface is downward, and the sliding push plate-N magnet used for extending out is stably pushed back to reset under the action of a reset roller in the S magnetic plate magnetism isolating device; the N magnetic pushing and leaning plate is used for magnetically acting on the extended sliding push plate-N when the well deviation correction is completed and the N magnetic pushing and leaning plate is reset, so that the sliding push plate-N is magnetically recovered for a certain distance.

The magnetic isolation device with the S magnetic plate comprises the S magnetic plate, the magnetic isolation plate and the reset rolling shaft, the S magnetic plate is embedded in the groove-shaped frame, the reset rolling shaft is arranged at the upper port of the groove-shaped frame, the magnetic isolation plate is arranged between the S magnetic plate and the reset rolling shaft, and the bottom surface of the lower frame wall of the groove-shaped frame is also provided with the telescopic supporting device interface.

The flexible strutting arrangement includes spacing outer slide rail, supports interior track, spring in the above-mentioned scheme, and spacing outer slide rail is the box-shaped body that has the open end, supports the interior track and is located spacing outer slide rail and with spacing outer slide rail sliding connection, and spacing outer slide rail sets up the spring with supporting the interior track, can make and support the interior track and stretch out and draw back, can guarantee to take N magnetic sheet magnetism isolating device and take S magnetic sheet magnetism isolating device to reciprocate.

The invention has the following beneficial effects:

1. the structure of the invention is a mechanical structure, no electronic device is provided, the cost is low, the high temperature resistance is realized, the reliability is high, and the applicability is strong; the mechanical automatic vertical drilling tool does not have any electronic component, has the advantages of low cost, high temperature resistance, strong applicability, high reliability and the like due to the fact that the whole structure is of a mechanical structure, can be more suitable for complex underground structures in steep and highly-inclined areas, can effectively solve the problems of deviation prevention and deviation correction of drilling, improves the drilling efficiency of a straight well, and increases economic benefits.

2. The drilling fluid diversion area is provided with the sliding rail diversion drilling fluid platform and the unbalanced sliding plate diversion drilling fluid platform, so that the drilling fluid diversion capacity can be enhanced, and the deviation rectification efficiency can be improved.

3. The pushing device area of the invention achieves better inclination correction effect by utilizing the interaction between N, S magnetism.

4. The area containing the pushing device is provided with the drilling fluid collecting device, so that the drilling fluid acting on the pushing device can be recycled, and the cost is saved.

Description of the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of a drilling fluid diversion area;

FIG. 3 is a schematic top sectional view of a drilling fluid diverter plate;

FIG. 4 is a schematic view of a lower junction of a drilling fluid diverter plate;

FIG. 5 is an enlarged schematic view of the center of a cross-sectional view of a drilling fluid diverter plate;

FIG. 6 is a schematic view of a deadweight drilling fluid diversion platform;

FIG. 7 is a schematic view of a baffle;

fig. 8 is a schematic view of a sliding rail plate push-pull rod;

FIG. 9 is a schematic view of a fixed axis;

FIG. 10 is a schematic view of an upper sealing plate of the sliding rail shunt drilling fluid platform;

FIG. 11 is a schematic view of a slide track diverting drilling fluid device;

FIG. 12 is an enlarged schematic view of a slide rail diverting drilling fluid device;

FIG. 13 is a schematic view of an upper sealing plate of a partial weight slide plate diversion drilling fluid platform;

FIG. 14 is a schematic view of the slide plate apparatus with offset weight;

FIG. 15 is a schematic view of a weight slide;

FIG. 16 is a schematic top cross-sectional view of the retractable slide;

FIG. 17 is a schematic view of a platform with a slide plate having a bias weight;

FIG. 18 is a schematic view of the pusher region configuration;

FIG. 19 is a schematic view of a sealing plate on the pushing device region;

FIG. 20 is a schematic view of a pusher platform;

FIG. 21 is a schematic view of the pushing device;

FIG. 22 is a schematic view of the telescoping curved pusher-N magnetic side cross section;

FIG. 23 is a schematic view of a magnetic shield with N magnetic plates;

FIG. 24 is a schematic view of the cross-sectional view of the N magnetic side of the over-current telescoping pusher;

FIG. 25 is a schematic view of an over-current telescoping pusher-N magnetic carrier;

FIG. 26 is a schematic view of the inside of the magnetic shield with the magnetic plate S;

FIG. 27 is a schematic view of the outer side of the magnetic shield with the magnetic plate S;

FIG. 28 is a schematic view of the telescoping backup plate-N magnet;

FIG. 29 is a schematic view of the telescoping support device;

FIG. 30 is a schematic view of a three-part connecting wall;

FIG. 31 is a schematic view of a pusher bed;

FIG. 32 is a schematic view of the thrust device operating configuration at the time of deskewing;

FIG. 33 is a schematic view of a lower sealing plate of the pushing device;

FIG. 34 is a schematic view of an upper sealing plate of the drilling fluid collection platform;

FIG. 35 is a schematic view of a drilling fluid collection platform;

FIG. 36 is a schematic view of a static wellbore;

FIG. 37 is a schematic view of a drill bit;

fig. 38 is an overall sectional view of the present invention.

In the figure: 1, a drilling fluid diversion area; 2. a pusher region; 3. a drilling fluid flow distribution plate; 4. a self-weight drilling fluid diversion platform; 5. a sliding rail shunt drilling fluid platform; 6. the unbalanced weight sliding plate shunts the drilling fluid platform; 7. a balancing steel cable; 8. a flexible hose; 9. a sliding rail plate push-pull rod; 10. an overflow pipe; 11. an inner drill string; 12. drilling a column hole inside; 13. an overflowing hole; 14. a rotating shaft; 15. a balanced cable interface; 16. a baffle; 17. a sliding rail plate push-pull rod connecting port; 18. an inner drill string inclined bore; 19. fixing a shaft center hole; 20. fixing the axis; 21. a slide rail shunt drilling fluid platform upper sealing plate; 22. a sliding rail plate push-pull rod moving area; 23. a sliding rail shunt drilling fluid device; 24. a slide rail baffle; 25. the eccentric weight sliding plate shunts the upper sealing plate of the drilling fluid platform; 26. a slide plate device with a bias weight; 27. a heavy slide plate; 28. a retractable slide rail; 29. a weight biasing rotating shaft; 30. a rubber stopper; 31. a boost vent hole; 32. fixing the outer rail; 33. moving the inner rail; 34. sealing the cover; 35. a spring; 36. a platform with a heavy slide plate; 37. a deflection block rotating shaft deflection zone; 38. a rotating shaft is buckled; 39. a square hole flow passing pipe; 40. an upper sealing plate of the pushing device area; 41. a pusher zone; 42. a drilling fluid collection device; 43. a drill bit; 44. a backup device platform; 45. a backup device; 46. a three-party connection wall; 47. a telescopic arc sidewall contact device-N magnetism; 48. a magnetism isolation device with N magnetic plates; 49. an over-current telescopic pushing device-N magnet; 50. a magnetic isolation device with an S magnetic plate; 51. telescoping sidewall contact-N magnet; 52. a telescopic support device; 53.N magnetic pusher plate; 54. limiting the outer sliding rail; 55. resetting the roller; 56. a magnetic shield plate; an N magnetic plate; 58. a telescoping support device interface; 59. n magnetic carriers; 60. sliding push plate-N magnet; 61. a vent hole; 62. a fixing hole; 63. a vertical rotating shaft; 64. a moving area; 65.S magnetic sheet; 66. placing N magnetic backup plate sliding rails; 67, N magnetic backup plates; 68. supporting the inner rail; 69. a limiting outer slide rail top end fixing area; 70. placing a tail end fixing area of the slide rail of the N magnetic backup plates; 71. a backup device base table; 72. limiting the tail end fixing area of the outer sliding rail; 73. a telescoping support device placement area; 74. n magnetic carrier supporting columns; 75. the three sides are connected with a wall fixing area; 76. a lower sealing plate of the pushing device; 77. an upper sealing plate of the drilling fluid collecting platform; 78. a bit connection region; 79. a drilling fluid collection platform; 80. a static wellbore; n magnetic backup plate expansion region; 82. and a liquid discharge hole.

The specific implementation mode is as follows:

the invention is further described below with reference to the accompanying drawings:

referring to fig. 1 to 38, the magnetic force-based mechanical static pushing type automatic vertical drilling deviation rectifying drilling tool comprises a drilling fluid diversion area 1 and a pushing device area 2; the drilling fluid diversion area 1 is positioned above the pushing device area 2, a drilling fluid diversion plate 3, a sliding rail diversion drilling fluid platform 5, a bias weight sliding plate diversion drilling fluid platform 6 and the pushing device area 2 in the drilling fluid diversion area 1 are all rigidly connected with the inner wall of a static shaft 80, a drilling fluid collecting device 42 of the pushing device area 2 is externally connected with a drill bit 43, a rotating shaft is arranged at the joint of the drilling fluid collecting device 42 of the pushing device area 2, an inner drill string 11 passes through inner drill string holes 12 of the drilling fluid diversion area 1 and the pushing device area 2 from top to bottom from the center and is rigidly connected with the drill bit 43, the joint of the inner drill string 11 with the drilling fluid diversion area 1 and the inner drill string holes 12 of the pushing device area 2 is provided with the rotating shaft, the inner drill string 11 can be driven to rotate together when rotating, in the integral operation process, when a well deviation occurs, the pushing device area 2 can extend out of the pushing plate to act on the high side wall of the well bore, and can reset until the well deviation is corrected, thereby achieving good anti-inclination effect. The method comprises the following specific steps:

the mechanical static pushing type automatic vertical drilling deviation rectifying drilling tool based on the magnetic force comprises a static shaft 80, an inner drilling string 11 and a drill bit 43, wherein the static shaft 80 is provided with a drilling fluid diversion area 1, a pushing device area 2 and a drilling fluid collecting device 42; the drilling fluid diversion area 1 is positioned above the pushing device area 2, a drilling fluid collecting device 42 is arranged below the pushing device area 2, an inner drill string 11 passes through an inner drill string hole 12 of the drilling fluid diversion area 1, an inner drill string hole of the pushing device area 2 and the drilling fluid collecting device 42 from top to bottom from the center and is rigidly connected with a drill bit 43, rotating shafts 14 are arranged at the joints of the inner drill string 11, the inner drill string hole of the drilling fluid diversion area 1, the inner drill string hole of the pushing device area 2 and the drilling fluid collecting device 42, and the drill bit 43 is driven to rotate together when the inner drill string 11 rotates automatically; the drilling fluid diversion area 1 and the pushing device area 2 are both rigidly connected with the inner wall of the static wellbore 80.

Drilling fluid flow distribution plates 3, sliding rail flow distribution drilling fluid platforms 5 and eccentric weight sliding plate flow distribution drilling fluid platforms 6 are arranged in the drilling fluid flow distribution area 1 at intervals from top to bottom, pushing device area upper sealing plates 40 and pushing device platforms 44 are arranged in the pushing device area 2 at intervals from top to bottom, and overflowing holes 13 are uniformly formed in the drilling fluid flow distribution plates 3, the sliding rail flow distribution drilling fluid platforms 5, the eccentric weight sliding plate flow distribution drilling fluid platforms 6, the pushing device area upper sealing plates 40 and the pushing device platforms 44 in the circumferential direction; the overflowing holes of the drilling fluid shunt plate 3 and the sliding rail shunt drilling fluid platform 5 are connected through a flexible hose 8, and the overflowing holes of the sliding rail shunt drilling fluid platform 5 and the overflowing holes of the heavy sliding plate shunt drilling fluid platform 6 are connected through an overflowing pipe 10; the overflow holes of the offset weight sliding plate diversion drilling fluid platform 6 and the overflow holes of the sealing plate 40 on the pushing device area are also connected through the overflow pipe 10.

The drilling fluid diversion area 1 is provided with a self-weight drilling fluid diversion platform 4, the self-weight drilling fluid diversion platform 4 is arranged between a drilling fluid diversion plate 3 and a sliding rail diversion drilling fluid platform 5 and is fixed through a balance steel cable 7, the self-weight drilling fluid diversion platform 4 is connected with each flexible hose 8 through each diversion plate 16, each balance steel cable 7 is arranged between the drilling fluid diversion plate 3 and the upper end face of each diversion plate 16, the drilling fluid diversion plate 3 and each diversion plate 16 are provided with a balance steel cable interface 15, a sliding rail plate push-pull rod 9 is arranged between the lower end face of each diversion plate 16 and the unbalanced sliding plate diversion drilling fluid platform 6, the balance steel cables 7 correspond to the sliding rail plate push-pull rods 9 one by one, and each flexible hose 8 is wound outside each balance steel cable 7 in a ring; one end of each sliding rail plate push-pull rod 9 is connected with a sliding rail plate push-pull rod connecting port 17 of the guide plate, the other end of each sliding rail plate push-pull rod 9 penetrates through a sliding rail plate push-pull rod moving area 22 of an upper sealing plate 21 of the sliding rail shunt drilling fluid platform and is connected with a sliding rail plate push-pull rod connecting port 17 of a sliding rail baffle plate 24 in the sliding rail shunt drilling fluid device, and the connecting positions of the two ends of each sliding rail plate push-pull rod are fixed at a fixed shaft center hole 19 by using a fixed shaft center 20; the upper sealing plate 25 of the eccentric weight sliding plate diversion drilling fluid platform is connected with the eccentric weight sliding plate device 26 below the upper sealing plate 25, the eccentric weight sliding plate device 26 comprises an eccentric weight sliding plate platform 36, 6 eccentric weight sliding plates 27 and 12 telescopic sliding rails 28, the ports of the movable inner rails 33 of the telescopic sliding rails 28, which are close to the sealing cover 34, are fixedly connected with the inner ends of the eccentric weight sliding plates, the ports of the fixed outer rails 32 of the telescopic sliding rails 28, which are far away from the sealing cover 34, are fixedly connected with the center of the eccentric weight sliding plate platform 36, the sealing cover 34 is fixedly connected with the fixed outer rails 32, and the pressurizing and discharging holes 31 of the eccentric weight sliding plates 27 are adjacent to the overflowing holes of the eccentric weight sliding plate platform 36.

The pushing device area 2 comprises pushing device area upper sealing plates 40 and pushing device platforms 44, a pushing device 45 is arranged on each pushing device area upper sealing plate 40 at the position corresponding to an overflowing hole on each pushing device area upper sealing plate 44 on each pushing device area upper sealing plate, each pushing device 45 comprises a telescopic arc-shaped pushing device-N magnet 47, a magnetic isolation device 48 with an N magnetic plate, a telescopic pushing device-N magnet 49 capable of overflowing, a magnetic isolation device 50 with an S magnetic plate, a telescopic pushing device-N magnet 51 and a telescopic supporting device 52, each telescopic arc-shaped pushing device-N magnet 47 comprises a limiting outer slide rail 54 and a limiting outer slide rail end fixing area 72, the limiting outer slide rail end fixing area 72 is arranged on each pushing device platform 44, the tail end of each limiting outer slide rail 54 is fixed on the limiting outer slide rail end fixing area 72 at the upper end of a device base 71, the N magnetic push plate 53 is arranged in each limiting outer slide rail 54, and a spring 35 is arranged between each N magnetic push plate 53 and each limiting outer slide rail 54, the N magnetic push plate 53 can extend out or retract from the limiting outer slide rail 54, and when the N magnetic push plate 53 extends out, the extending end of the N magnetic push plate extends into a fixing area 69 at the top end of the limiting outer slide rail of the three-way connecting wall 46; the three-way connecting wall 46 is placed in a three-way connecting wall fixing area 75 of the pushing device platform 44, the three-way connecting wall 46 comprises a magnetic isolation device 48 with an N magnetic plate, a flexible pushing device-N magnetic 49 capable of flowing over and a magnetic isolation device 50 with an S magnetic plate, telescopic supporting devices 52 are arranged below the magnetic isolation device 48 with the N magnetic plate and the magnetic isolation device 50 with the S magnetic plate, limiting outer sliding rails 54 of the two telescopic supporting devices 52 are respectively placed in telescopic supporting device placing areas 73 of the pushing device platform 44, and telescopic supporting device interfaces 58 with the magnetic isolation device 48 with the N magnetic plate and the magnetic isolation device 50 with the S magnetic plate are connected with supporting inner rails 68 of the telescopic supporting devices 52; the fixing hole 62 of the N magnetic carrier 59 in the overflow telescopic pushing device-N magnet 49 is connected with the N magnetic carrier supporting column 74 on the pushing device platform 44, a supporting platform is arranged at the overflow hole of the pushing device platform 44, and the N magnetic carrier supporting column 74 is fixed on the supporting platform; the tail end of an N-magnetic backup plate slide rail 66 placed in the N magnet is connected with a tail end fixing area 70 of the three-way connecting wall 46 for placing the N-magnetic backup plate slide rail, and the top end of the N-magnetic backup plate slide rail 66, namely the extending end of the N-magnetic backup plate 67 is placed at an N-magnetic backup plate telescopic area 81 of the static shaft 80; the pushing device platform 44 is connected with a pushing device lower sealing plate 76 below the pushing device platform, and a drilling fluid collecting platform upper sealing plate 77 in the drilling fluid collecting device and a drilling bit connecting area 78 of a drilling fluid collecting platform 79 are externally connected with a drilling bit.

The drilling fluid flow distribution plate 3, the sliding rail flow distribution drilling fluid platform 5, the unbalanced sliding plate flow distribution drilling fluid platform 6 in the drilling fluid flow distribution area 1, and the upper sealing plate 40, the pushing device area 41 and the drilling fluid collecting device 42 of the pushing device platform in the pushing device area 2 are all fixedly connected with the inner wall of the static wellbore 80; the inner drill string 11 passes through the inner drill string hole 12 of the drilling fluid diversion plate 3 in the drilling fluid diversion area 1, the inner drill string inclined hole 18 of the self-weight drilling fluid diversion platform, the inner drill string hole 12 of the sliding rail diversion drilling fluid platform 5, the inner drill string hole of the self-weight sliding plate diversion drilling fluid platform 6 from top to bottom, passes through the inner drill string hole of the upper sealing plate 40 of the pushing device area in the pushing device area 2, the inner drill string hole of the pushing device area 41 and is finally rigidly connected with the inner drill string hole of the drill bit 43.

When a well deviation occurs, the pushing device area 2 can extend out of the N magnetic pushing plate 67 to act on the wall of the high side of the well bore, and the N magnetic pushing plate can not reset until the well deviation is corrected.

The upper sealing plate 25 of the offset slide plate shunt drilling fluid platform is connected with the offset slide plate device 26 below the upper sealing plate to form an offset slide plate shunt drilling fluid platform 6.

The dead weight drilling fluid diversion platform 4 in the drilling fluid diversion area 1 is connected with the drilling fluid diversion plate 3 above through the balance steel cable 7 and is not in contact with the inner wall of the static shaft 80, so that when well deviation occurs, the dead weight drilling fluid diversion platform 4 is only influenced by gravity and is always in a horizontal state in the whole inclination process of a drilling tool, the distance between the diversion plate 16 and the sliding rail diversion drilling fluid platform 5 is changed, the sliding rail plate push-pull rod 9 is enabled to move left and right, the sliding rail baffle plate 24 is driven to move, and diversion of drilling fluid is completed.

The overflowing hole 13 of the guide plate 16 in the self-weight drilling fluid diversion platform 4 is connected with the overflowing hole 13 of the drilling fluid diversion plate 3 through the telescopic hose 8, the overflowing hole of the upper sealing plate 21 of the sliding rail diversion drilling fluid platform is connected with the lower flowing hole, and therefore when well deviation occurs, the whole inclination process of a drilling tool can be guaranteed, the change of the distance between the self-weight drilling fluid diversion platform 4 and the upper drilling fluid diversion plate 3 and the lower sliding rail diversion drilling fluid platform 5 can not damage pipelines, and conveying of drilling fluid is affected.

The diameter of an inner drill string inclined hole 18 of the self-weight drilling fluid diversion platform 4 is far larger than that of the inner drill string 11, so that when well deviation occurs and the drilling tool is integrally inclined, the inner drill string has enough inclined space.

The two ends of the sliding rail plate push-pull rod 9 are arc-shaped, and the two ends of the sliding rail plate push-pull rod are fixed at the position of a fixed shaft center hole 19 by using a fixed shaft center 20 at the position of a connecting port of the sliding rail plate push-pull rod, so that the sliding rail plate push-pull rod 9 can deflect to drive a sliding rail baffle 24 to move when a well deviation occurs.

The upper sealing plate 21 of the sliding rail shunt drilling fluid platform is provided with a sliding rail plate push-pull rod moving area 22, so that space is provided for the sliding rail plate push-pull rod 9 to move left and right, and when well deviation occurs, the sliding rail plate push-pull rod 9 drives the sliding rail baffle plate 24 to move, enough moving space is provided, and shunt of drilling fluid is better completed.

The initial position of the slide rail baffle plate 24 of the slide rail shunt drilling fluid device 23 covers half space of the overflowing hole, so that when well deviation occurs and the slide rail baffle plate 24 moves, shunt of drilling fluid at the high side of a well is increased, shunt of drilling fluid at the low side of the well is reduced, and the shunt of drilling fluid is completed again.

The eccentric weight rotating shaft 29 is arranged on the eccentric weight sliding plate in the device 26 with the eccentric weight sliding plate, the end (outer end) of the eccentric weight rotating shaft 29, which is close to the pressurizing drainage hole 31, is a light block, and the inner end is an eccentric weight, so that when well deviation occurs, when the eccentric weight sliding plate on the lower side of a well hole slides out to the limit, only the light block part can be washed by drilling fluid, the eccentric weight cannot be washed by the drilling fluid, and the shunting of the drilling fluid is completed.

Rubber stoppers 30 are arranged above the weight rotating shaft light block and below the weight of the weight sliding plate 27, so that the weight rotating shaft 29 can be ensured to stop deflecting after deflecting to a certain angle, and meanwhile, the damage to the light block and the weight is reduced.

The unbalance slide plate 27 is provided with the pressurizing and discharging hole 31, so that the unbalance slide plate 27 can be accelerated to extend out by flushing of drilling fluid when the drilling fluid passes through the pressurizing and discharging hole 31 when the unbalance slide plate on the lower side of a well hole slides out when well deviation occurs, the flow of the drilling fluid on the lower side of the well hole is reduced, the flow of the drilling fluid on the higher side of the well hole is increased, the shunting efficiency of the drilling fluid is improved, and the well deviation is corrected more quickly; the inclined sliding plate can be prevented from extending out until the inclined sliding plate extends out completely by scouring the drilling fluid which is gradually increased at the lower edge of the well bore when the drilling fluid passes through the pressurizing drainage hole 31 in the well deviation correcting process, and the telescopic sliding rail 28 can pull back the inclined sliding plate which extends out completely and the inclined sliding block rotating shaft restores to the horizontal state after the well deviation correcting process is completed, so that the average shunt of the drilling fluid in the vertical drilling state is restored.

The spring 35 in the telescopic slide rail 28 of the device 26 with the bias weight sliding plate is placed on the movable inner rail 33, so that the bias weight sliding plate 27 can be pulled back by the spring in the well deviation correcting process and after the well deviation correcting is finished.

The platform 36 with the unbalanced sliding plate is provided with a buckle rotating shaft 38, which can ensure that: reducing the friction when the imbalance slide plate 27 slides out and is retracted; in the process of correcting the well deviation, when the weight deviation sliding plate 27 with the weight deviation rotating shaft 29 deflected clockwise is pulled back, the weight deviation is contacted with the buckle rotating shaft 38 to play a buckle effect together, so that the weight deviation sliding plate 27 is stopped after being pulled back for a certain distance, the flow rate of the drilling fluid at the low side of the well bore is stably reduced, the flow rate of the drilling fluid at the high side of the well bore is improved, and the deviation correcting efficiency is improved; in the course of correcting the well deviation, when the weight slide plate 27 extends for the second time, the friction between the weight block playing the role of buckle and the buckle rotating shaft 38 is reduced.

The platform 36 with the eccentric weight sliding plate is provided with an eccentric weight rotating shaft deflection area 37, and the overflowing hole of the upper sealing plate 25 of the eccentric weight sliding plate shunt drilling fluid platform is provided with a square opening, so that a sufficient deflection space can be ensured for a light block and an eccentric weight of the eccentric weight rotating shaft.

The pushing device 45 of the pushing device platform 44 in the pushing device area 2 is provided with 3 telescopic arc pushing devices-N magnetic 47 which are arranged according to the shape of a Chinese character pin, so that a triangular structure can be formed when the N magnetic pushing plate acts on a sliding pushing plate-N magnetic of the over-current telescopic pushing device-N magnetic, and the structure is more stable; a spring is arranged in the telescopic arc pushing device-N magnet 47, so that the N magnet pushing plate 53 can be ensured to extend out and retract; the N magnetic pushing plate 53 of the telescopic arc pushing device-N magnetic 47 is designed in an arc shape, the direction of the arc surface is downward, and the N magnetic pushing plate 53 can be stably pushed back to reset under the action of the resetting roller 55 and the N magnetic plate 57 in the magnetic isolation device with the N magnetic plate.

The magnetism isolating device 48 with the N magnetic plates comprises the N magnetic plates 57, magnetism isolating plates 56 and a reset roller 55, wherein the N magnetic plates 57 are embedded in the groove-shaped frame, the reset roller 55 is arranged at the upper end opening of the groove-shaped frame, the magnetism isolating plates 56 are arranged between the N magnetic plates 57 and the reset roller 55, and the bottom surface of the lower frame wall of the groove-shaped frame is provided with a telescopic supporting device interface 58.

The N magnet 49 capable of overflowing and stretching the pushing device comprises an N magnet carrier 59 and a sliding push plate-N magnet 60, wherein the N magnet carrier 59 is a track groove, a moving groove and a discharge hole 61 are formed in the inner bottom surface of the track groove, a plurality of fixing holes 62 are formed in the outer bottom surface of the track groove, the fixing holes 62 are arranged in a cross shape, the N magnet carrier is connected with a supporting column through the fixing holes in the outer bottom surface, the sliding push plate-N magnet is just placed in the N magnet carrier, and the sliding push plate-N magnet is in sliding connection with the moving groove.

The magnetic isolation device 50 with the S magnetic plate comprises the S magnetic plate 65, a magnetic isolation plate 56 and a reset roller 55, wherein the S magnetic plate 65 is embedded in the groove-shaped frame, the reset roller 55 is arranged at the upper port of the groove-shaped frame, the magnetic isolation plate 56 is arranged between the S magnetic plate 65 and the reset roller 55, and the bottom surface of the lower frame wall of the groove-shaped frame is also provided with a telescopic supporting device interface.

The telescopic supporting device 52 comprises a limiting outer sliding rail 54, a supporting inner rail 68 and a spring, wherein the limiting outer sliding rail 54 is a box-shaped body with an open end, the supporting inner rail 68 is positioned in the limiting outer sliding rail 54 and is connected with the limiting outer sliding rail 54 in a sliding manner, and the limiting outer sliding rail 54 and the supporting inner rail 68 are provided with springs.

The sliding push plate-N magnet 60 of the over-current telescopic pushing device-N magnet 49 of the pushing device 45 is designed in an arc shape, the direction of the arc surface is downward, and the extended sliding push plate-N magnet 60 can be stably pushed back to reset under the action of a reset roller in the S-shaped magnetic plate magnetism isolating device.

The N magnetic plate magnetic isolation device 48 and the S magnetic plate magnetic isolation device 50 of the pushing device 45 are provided with the reset roller 55, so that the reset roller with the N magnetic plate magnetic isolation device can be stably pushed back to the N magnetic push plate for a certain distance on the premise of reducing the friction force between the reset roller and the N magnetic push plate and the sliding push plate-N magnet, and the reset roller with the S magnetic plate magnetic isolation device can be completely pushed back to the sliding push plate-N magnet 60.

The N magnetic plate magnetism isolating device 48 and the S magnetic plate magnetism isolating device 50 of the pushing device 45 are provided with magnetism isolating plates 56, so that the N magnetic sliding pushing plate-N magnetic of the over-current telescopic pushing device can be ensured not to be influenced by the N magnetic plate in the N magnetic plate magnetism isolating device and the S magnetic plate in the S magnetic plate magnetism isolating device; after the magnetic isolation device 48 with the N magnetic plate and the magnetic isolation device 50 with the S magnetic plate move downwards to the limit distance, the N magnetic plate 57 can not act on the N magnetic pushing plate 53, and the S magnetic plate 65 can not act on the N magnetic pushing plate 67.

The N magnetic plate 57 is arranged on the N magnetic plate magnetism isolating device of the pushing device 45 and faces the telescopic arc pushing device-N magnet 47, so that when no well deviation occurs, the N magnetic plate 57 acts on the N magnetic pushing plate 53, and the N magnetic pushing plate 53 is in a recovery state.

The S magnetic plate is arranged on the S magnetic plate magnetic isolation device 50 of the pushing device 45 and faces the telescopic pushing device-N magnetic 51, so that the S magnetic plate acts on the N magnetic pushing plate when no well deviation occurs, and the N magnetic pushing plate is in a recovery state.

An N magnetic backup plate 67 is arranged on the telescopic backup device-N magnet 51 of the backup device 45, so that when well deviation correction is completed, the N magnetic backup plate 67 acts on the extended sliding push plate-N magnet 60 when being reset, and the sliding push plate-N magnet is recovered for a certain distance.

A spring is arranged in a telescopic supporting device 52 of the pushing device 45, so that the telescopic inner track can be stretched, and the magnetic isolation device 48 with the N magnetic plate and the magnetic isolation device 50 with the S magnetic plate can be ensured to move up and down.

The pushing device area is provided with a drilling fluid collecting device, so that the drilling fluid can be recycled, and the cost is saved.

The working principle of the invention is as follows: when no well deviation occurs, the drilling fluid flows in from the top end of the drilling fluid diversion area 1, is diverted at the drilling fluid diversion plate 3, part of the drilling fluid directly flows to the drill bit 43 from a channel on the inner drill string 11, is discharged from a liquid discharge hole 82 at the bottom of the drill bit 43, other drilling fluid is averagely diverted, flows downwards from 6 overflowing holes 13 on the drilling fluid diversion plate 3, reaches 3 guide plates 16 on the dead weight drilling fluid diversion platform 4 through the telescopic hose 8, then flows downwards from the overflowing holes 13 on the guide plates 16, reaches the slide rail diversion drilling fluid platform 5 through the telescopic hose 8, sequentially passes through the overflowing holes 13 of the upper sealing plate 21 of the slide rail diversion drilling fluid platform in the slide rail diversion drilling fluid platform 5 and the overflowing holes 13 of the slide rail diversion device, continuously flows downwards, reaches the dead weight sliding plate diversion drilling fluid platform 6 through the overflowing holes 13 of the upper sealing plate 25 of the dead weight sliding plate diversion drilling fluid platform in the slide rail diversion drilling fluid platform 6 and the slide rail diversion device with dead weight The through-flow holes 13 of the plate device 26 pass through the through-flow holes 13 of the square-hole through-flow pipe 39 and the through-flow holes 13 of the pushing device area upper sealing plate 40 downwards to reach the pushing device platform 44, and the N-magnetic-plate magnetic-isolation device 48, the N-magnetic-plate magnetic-isolation device-N-magnetic 49 and the S-magnetic-plate magnetic-isolation device 50 which are surrounded by the three-side connecting wall 46 in the pushing device 45 on the pushing device platform 44 are flushed, so that the drilling fluid flow is insufficient, the N-magnetic-plate magnetic-isolation device 48 and the S-magnetic-plate magnetic-isolation device 50 cannot move downwards, and the drilling fluid continues to pass through the through-flow holes 13 of the pushing device base table 71 and the through-flow holes 13 of the pushing device lower sealing plate 76 to reach the drilling fluid collection platform upper sealing plate 77 and is discharged downwards from the drilling fluid discharge holes 82 at the drilling fluid collection platform upper sealing plate 77 and the drilling fluid collection platform 79; when a well is inclined, because the deadweight drilling fluid diversion platform 4 is not in contact with the inner wall of the static shaft 80 and is only influenced by gravity, the drilling tool is always kept in a horizontal state when the whole drilling tool inclines, at the moment, the distance between the deadweight drilling fluid diversion platform 4 and the sliding rail diversion drilling fluid platform 5 is reduced, the reduction range of the high side distance of a well hole is large, the reduction range of the low side distance of the well hole is small, at the moment, the joint of the sliding rail plate push-pull rod connecting port 17 of the guide plate 16 in the deadweight drilling fluid diversion platform 4 and the sliding rail plate push-pull rod connecting port 17 of the guide plate 24 in the sliding rail diversion drilling fluid device 23 is fixed and does not move to the low side of the well hole, at the same time, the sliding rail baffle 24 is driven to move to the low side of the well hole, the overflowing hole 13 at the low side of a half area which is sheltered by the sliding rail baffle 24 is increased by the sheltered area, the flowing drilling fluid flow is reduced, the overflowing hole 13 at the high side of the half area which is sheltered by the sliding rail baffle 24 is reduced by the sheltered area, the flow of the drilling fluid flowing through is increased, while the slide rail baffle 24 moves towards the lower side of the borehole, the weight slide plate 27 with the weight slide plate device 26 located in the lower side of the borehole slides out a certain distance under the influence of gravity, and at the same time, the movable inner rail 33 of the telescopic slide rail 28 is pulled to move outwards, the spring 35 of the telescopic slide rail 28 is compressed, when the pressure-increasing drain hole 31 of the weight slide plate 27 is exposed, the pressure-increasing drain hole 31 is subjected to the action force of the drilling fluid from top to bottom (the flow of the drilling fluid arriving from the through-hole 13 of the slide rail shunt drilling fluid device 23 is gradually reduced, so that the action force is gradually reduced), the extension of the weight slide plate 27 is accelerated (the extension speed is gradually reduced because the action force is gradually reduced), at this time, the rebound force after the spring 35 is compressed is smaller than the gravity and the action force of the drilling fluid on the weight slide plate 27 (in the process, when the weight slide plate 27 is fully extended (at this time, the flow of the drilling fluid flowing down through the flow hole 13 of the weight slide plate platform 36 at the lower side of the borehole is the minimum, and the flow of the drilling fluid at the higher side of the borehole is the maximum), the light block part of the weight rotating shaft 29 of the weight slide plate 27 is fully exposed, and receives the action force of the drilling fluid from top to bottom (at this time, the action force is the minimum), the weight part of the weight rotating shaft 29 is located above the weight rotating shaft deflection area 37 of the weight slide plate platform 36, at this time, the self gravity of the weight part of the weight rotating shaft 29 is greater than the self gravity of the light block part of the weight rotating shaft 29 and the action force of the drilling fluid on the light block part, and the weight rotating shaft 29 deflects clockwise, when the weight rotating shaft 29 deflects clockwise, the flow of the drilling fluid from the overflow hole 13 of the drilling fluid diversion device 23 to the device 26 with the weight sliding plate is minimum from the direction of the lower side of the borehole, the compressed spring 35 in the telescopic sliding rail 28 begins to rebound, at this time, the rebound force of the spring 35 in the telescopic sliding rail 28 is larger than the gravity and the acting force of the drilling fluid on the pressure boosting discharge hole 31 of the weight sliding plate 27, the weight sliding plate 27 is pulled back, meanwhile, the weight part of the weight rotating shaft 29 is contacted with the buckle rotating shaft 38, the clockwise deflection speed of the weight rotating shaft 29 is accelerated in the pulling back process of the weight sliding plate 27, the maximum deflection angle is reached when the weight part of the weight rotating shaft 29 deflects to the rubber stopper 30 of the weight rotating shaft 29, the weight part of the weight rotating shaft 29 and the buckle rotating shaft 38 form a buckle effect, and the weight sliding plate 27 cannot be completely withdrawn, at this time, the imbalance slide plate 27 still keeps a state of extending for a part of distance, and the extending part of the imbalance slide plate 27 stably reduces the flow of the drilling fluid flowing downwards through the overflowing hole 13 with the imbalance slide plate platform 36, so that the flow of the drilling fluid in the high-side direction of the well bore is further increased, and the working efficiency of the high-side pushing device area 2 of the well bore is improved.

The drilling fluid with increased flow in the direction of the high side of the borehole sequentially passes through the overflowing hole 13 of the slide rail shunting drilling fluid device 23, the overflowing pipe 10, the overflowing hole 13 of the upper sealing plate 25 of the bias slide plate shunting drilling fluid platform, the overflowing hole 13 with the bias slide plate device 26, the square hole overflowing pipe 39 and the overflowing hole 13 of the upper sealing plate 40 of the pushing device area, reaches the pushing device 45 on the pushing device platform 44 in the pushing device area 41, flushes the N magnetic plate magnetism isolating device 48, the overflowing telescopic pushing device-N magnetism 49 and the S magnetic plate magnetism isolating device 50 in the pushing device 45, the N magnetic plate magnetism isolating device 48 and the S magnetic plate magnetism isolating device 50 move downwards under the flushing action of the drilling fluid and compress the telescopic supporting device 52, the supporting inner rail 68 of the telescopic supporting device 52 moves downwards, the spring 35 of the telescopic supporting device 52 is compressed, when the N magnetic plate magnetism isolating device 48 moves downwards for a certain distance, the magnetic isolation plate 56 with the N-magnetic plate magnetic isolation device 48 prevents the N-magnetic plate 57 with the N-magnetic plate magnetic isolation device 48 from repelling the N-magnetic push plate 53 with the N-magnetic 47 which is a single telescopic arc-shaped pushing device above the N-magnetic plate arranged in a shape like the Chinese character pin, the N-magnetic push plate 53 with the N-magnetic 47 which is two telescopic arc-shaped pushing devices below the N-magnetic plate arranged in a shape like the Chinese character pin still keeps a contraction state under the action of the repulsive force of the N-magnetic plate 57 with the N-magnetic plate magnetic isolation device 48, the N-magnetic push plate 53 with the N-magnetic 47 which is a single telescopic arc-shaped pushing device above the N-magnetic plate arranged in a shape like the Chinese character pin extends outwards under the action of the repulsive force of the compression spring 35 in the telescopic arc-shaped pushing device N-magnetic 47 to act on the sliding push plate-N-magnetic push plate 60 which can flow through the telescopic device-N-magnetic 49, and the sliding N magnetic push plate 60 slides rightwards under the action of the repulsive force and the pushing force of the N-magnetic push plate 53, the extended N magnetic push plate 53 acts on the sliding push plate-N magnetic 60 in the right direction and simultaneously contacts with the reset roller 55 with the N magnetic plate magnetism isolating device 48, the downward moving speed of the N magnetic plate magnetism isolating device 48 is accelerated, the sliding push plate-N magnetic 60 moves in the right direction and simultaneously contacts with the reset roller 55 with the S magnetic plate magnetism isolating device 50, the downward moving speed of the S magnetic plate magnetism isolating device 50 is accelerated, after the N magnetic plate magnetism isolating device 48 and the S magnetic plate magnetism isolating device 50 move to the farthest distance, the N magnetic plate 57 with the N magnetic plate magnetism isolating device 48 cannot repel the N magnetic push plate 53 with the telescopic arc push device-N magnetic 47, the S magnetic plate 65 with the S magnetic plate magnetism isolating device 50 cannot attract the N magnetic push plate 67 with the telescopic push device-N magnetic 51, and the N magnetic push plate 53 is extended outwards in the telescopic arc push device-N magnetic 47 under the action of the counter elasticity of the compression spring 35 and can act on the overflowing the telescopic arc push plate 53 The sliding push plate-N magnet 60 of the N magnet 49 is arranged, the sliding push plate-N magnet 60 slides rightwards under the action of the repulsive force and the pushing force of the N magnet push plate 53, the friction force is reduced by the vertical rotating shaft 63 of the flow telescopic pushing device-N magnet carrier 59, the sliding push plate-N magnet 60 moves farther in the moving area 64 in a shorter time, the sliding push plate-N magnet is more quickly acted on the N magnet pushing plate 67 of the telescopic pushing device-N magnet 51, the sliding push plate-N magnet 60 moves rightwards, simultaneously, the shielded drainage hole 61 on the flow telescopic pushing device-N magnet carrier 59 is exposed, one part of drilling fluid can flow downwards from the drainage hole 61 through the through-flow hole 13 of the pushing device bottom platform 71 and finally reaches the drilling fluid collecting device 42, the other part of drilling fluid directly flows through the through-flow hole 13 of the pushing device bottom platform 71 and finally reaches the drilling fluid collecting device 42, the N magnetic backup plate 67 gradually moves to the right to the farthest distance under the action of the repulsive force of the sliding push plate-N magnet 60 and the thrust, extends out of the N magnetic backup plate extension area 81 of the static shaft 80, finally acts on the well wall, and starts the well deviation correction process. In the process of correcting the well deviation, the angle of the well deviation is gradually reduced along with the continuous progress of correcting the well deviation, the flow rate of drilling fluid at the high edge of the well bore is gradually reduced, at the moment, the compressed spring 35 in the telescopic supporting device 52 begins to rebound, the N magnetic plate magnetism isolating device 48 and the S magnetic plate magnetism isolating device 50 move upwards, the reset roller 55 with the N magnetic plate magnetism isolating device 48 first contacts the N magnetic push plate 53 of the N magnetic 47 which is two telescopic arc-shaped devices arranged in a shape like the Chinese character 'pin', the reset roller 55 enables the N magnetic push plate 53 to contract for a certain distance, the N magnetic plate magnetism isolating device 48 with the N magnetic plate moves upwards continuously, the N magnetic plate 57 with the N magnetic plate magnetism isolating device 48 repels the N magnetic push plate 53, at the moment, the N magnetic push plate 53 of the N magnetic 47 which is two telescopic arc-shaped devices arranged in a shape like the Chinese character 'pin' is completely withdrawn, the N magnetic plate magnetism isolating device 48 continues to move upwards, the reset roller 55 with the N magnetic plate magnetism isolating device 48 contacts a single telescopic arc-shaped pushing device-N magnetic pushing plate 53 of the N magnetic 47 arranged in a shape like the Chinese character 'pin', the reset roller 55 enables the N magnetic pushing plate 53 to contract for a certain distance, the N magnetic plate magnetism isolating device 48 with the N magnetic plate moves upwards continuously, the N magnetic plate 57 with the N magnetic plate magnetism isolating device 48 repels the N magnetic pushing plate 53, at the moment, the single telescopic arc-shaped pushing device-N magnetic 47N magnetic pushing plate 53 arranged in a shape like the Chinese character 'pin' is completely withdrawn, and then 3 telescopic arc-shaped pushing devices-N magnetic 47N magnetic pushing plate 53 arranged in a shape like the Chinese character 'pin' are completely withdrawn, and the N magnetic plate magnetism isolating device 48 with the N magnetic plate is reset; when the S magnetic plate magnetism isolating device 50 moves upwards, the reset roller 55 with the S magnetic plate magnetism isolating device 50 is in contact with the sliding push plate-N magnet 60 of the overcurrent telescopic pushing device-N magnet 49, the reset roller 55 enables the sliding push plate-N magnet 60 to be retracted for a certain distance, when the S magnetic plate magnetism isolating device 50 is reset, the sliding push plate-N magnet 60 is reset, meanwhile, the S magnetic plate 65 with the S magnetic plate magnetism isolating device 50 attracts the N magnetic pushing plate 67 of the telescopic pushing device-N magnet 51, and the N magnetic pushing plate 67 is reset under the reaction force of the well wall and the attraction of the S magnetic plate 65. In the process of correcting the well deviation, the angle of the well deviation gradually decreases, the flow rate of drilling fluid at the lower side of the well hole gradually increases, a part of the weight slide plate 27 extending out of the weight slide plate device 26 is washed by the drilling fluid from top to bottom, along with the continuous increase of the flow rate of the drilling fluid, the acting force of the drilling fluid on the pressurizing and discharging hole 31 of the weight slide plate 27 and the light part of the weight rotating shaft 29 is continuously increased, the weight slide plate 27 gradually extends out, at the moment, the gravity of the light part of the weight rotating shaft 29 and the acting force of the drilling fluid are gradually larger than the gravity of the weight part of the weight rotating shaft 29, the weight rotating shaft 29 deflects counterclockwise, and when the weight rotating shaft 29 deflects counterclockwise and the weight slide plate 27 gradually extends out, the clamping rotating shaft 38 of the weight slide plate 36 in contact with the weight part of the weight rotating shaft 29 reduces the friction force between the contact surfaces, the weight bias sliding plate 27 can slide out more quickly, when the weight bias sliding plate 27 completely slides out, the weight bias rotating shaft 29 restores to the horizontal state, the well deviation correction process is finished, the drilling tool restores to the vertical drilling state, the weight bias sliding plate 27 is instantly retracted under the rebounding action of the spring 35 compressed in the telescopic slide rail 28, the weight bias sliding plate 27 finishes restoring, meanwhile, the distance between the self-weight drilling fluid diversion platform 4 and the slide rail shunt drilling fluid platform 5 restores to the initial state, the joint of the slide rail plate push-pull rod 9 and the slide rail plate push-pull rod connecting port 17 of the guide plate 16 in the self-weight drilling fluid diversion platform 4 is fixed, the joint of the slide rail plate push-pull rod connecting port 17 of the slide rail baffle plate 24 in the slide rail shunt drilling fluid device 23 moves towards the high side of the well eye, and simultaneously drives the slide rail baffle plate 24 to move towards the high side of the well eye, the slide rail baffle plate 24 restores to the initial state, and the whole structure of the drilling tool restores to the initial state, and evenly distributing the drilling fluid, and finishing the well deviation correction process.