阅读说明：本技术 无线随钻测斜仪的自清洁过滤机构以及无线随钻测斜仪 (Self-cleaning filtering mechanism of wireless inclinometer and wireless inclinometer ) 是由 王和顺 吴金昕 朱维兵 柳在鑫 张均富 向中凡 杨伟 于 2019-11-05 设计创作，主要内容包括：本发明公开了一种无线随钻测斜仪的自清洁过滤机构,包括支撑座、过滤筒和连接轴,所述支撑座设置有中心通孔,所述过滤筒内设置有过滤腔,且过滤筒的顶部封口,底部与支撑座相连；所述连接轴贯穿支撑座并延伸至过滤筒的过滤腔的顶部,且所述中心通孔和过滤腔均与连接轴间隙配合；所述过滤筒的顶部设置有轴向的条形滤槽,所述连接轴内设置有轴向延伸至连接轴下端的流道,流道与过滤腔连通；所述连接轴的外壁设置有叶片,所述叶片位于条形滤槽内并与条形滤槽间隙配合。本发明能够将条形滤槽内的清理掉,防止钻井液中的杂质将条形滤槽堵死,提高无线随钻测斜仪过滤机构使用的可靠性。(The invention discloses a self-cleaning filtering mechanism of a wireless inclinometer while drilling, which comprises a supporting seat, a filter cylinder and a connecting shaft, wherein the supporting seat is provided with a central through hole, a filter cavity is arranged in the filter cylinder, the top of the filter cylinder is sealed, and the bottom of the filter cylinder is connected with the supporting seat; the connecting shaft penetrates through the supporting seat and extends to the top of the filter cavity of the filter cartridge, and the central through hole and the filter cavity are in clearance fit with the connecting shaft; the top of the filter cylinder is provided with an axial strip-shaped filter groove, a flow passage axially extending to the lower end of the connecting shaft is arranged in the connecting shaft, and the flow passage is communicated with the filter cavity; the outer wall of the connecting shaft is provided with blades, and the blades are positioned in the strip-shaped filter cells and are in clearance fit with the strip-shaped filter cells. The invention can clean the strip-shaped filter cell, prevent impurities in drilling fluid from blocking the strip-shaped filter cell, and improve the use reliability of the filter mechanism of the wireless inclinometer while drilling.)

1. The self-cleaning filtering mechanism of the wireless inclinometer is characterized by comprising a supporting seat (2), a filter cartridge (1) and a connecting shaft (3), wherein the supporting seat (2) is provided with a central through hole, a filter cavity is arranged in the filter cartridge (1), the top of the filter cartridge (1) is sealed, and the bottom of the filter cartridge is connected with the supporting seat (2); the connecting shaft (3) penetrates through the supporting seat (2) and extends to the top of the filter cavity of the filter cartridge (1), and the central through hole and the filter cavity are in clearance fit with the connecting shaft (3); the top of the filter cylinder (1) is provided with an axial strip-shaped filter groove (11), a runner (31) axially extending to the lower end of the connecting shaft (3) is arranged in the connecting shaft (3), and the runner (31) is communicated with the filter cavity; the outer wall of the connecting shaft (3) is provided with blades (41), and the blades (41) are positioned in the strip-shaped filter cells (11) and are in clearance fit with the strip-shaped filter cells (11).

2. The self-cleaning filtering mechanism of the wireless inclinometer while drilling according to claim 1, wherein one end, away from the connecting shaft (3), of the upper end surface of the blade (41) is provided with an upper inclined surface (43), one end, away from the connecting shaft (3), of the lower end surface of the blade (41) is provided with a lower inclined surface (44), and the upper inclined surface (43) and the lower inclined surface (44) and the filter cartridge (1) axially enclose an angle of 40-60 degrees; the radial length of the upper inclined plane (43) and the lower inclined plane (44) is larger than the thickness of the strip-shaped filter cell (11).

3. The self-cleaning filtering mechanism of the wireless inclinometer while drilling according to claim 1, characterized in that the flow channel (31) passes through the connecting shaft (3) to connect the upper port of the flow channel (31) with the filter chamber.

4. The self-cleaning filtering mechanism of the wireless inclinometer while drilling according to claim 3, characterized in that the side wall of the connecting shaft (3) is provided with a drainage hole (32) for radially communicating the flow channel (31) with the filter cavity.

5. The self-cleaning filter mechanism of the wireless inclinometer while drilling according to claim 1, characterized in that the side wall of the filter cartridge (1) is provided with a plurality of radial guide holes (13).

6. The self-cleaning filtering mechanism of the wireless inclinometer while drilling according to claim 1, wherein the blades (41) are arranged on the outer wall of a positioning sleeve (42), the connecting shaft (3) is a stepped shaft, one end of the positioning sleeve (42) is attached to the stepped surface of the connecting shaft (3), and the other end of the positioning sleeve (42) is clamped by a clamp spring (5).

7. The self-cleaning filtering mechanism of the wireless inclinometer while drilling according to claim 1, characterized in that the outer wall of the filter cartridge (1) is provided with a loading and unloading groove (12).

8. The self-cleaning filtering mechanism of the wireless inclinometer while drilling according to claim 1, characterized in that the strip-shaped filtering tank (11) is multiple, the outer wall of the connecting shaft (3) is provided with a plurality of blades (41), and each blade (41) is positioned in the strip-shaped filtering tank (11).

9. The self-cleaning filter mechanism of the wireless inclinometer while drilling according to claim 1, characterized in that the filter chamber of the filter cartridge (1) is a stepped hole, the outer diameter of the upper part of the filter chamber is smaller than the inner diameter of the lower part of the filter chamber, and the outer diameter of the blade (41) is located between the outer diameter of the upper part of the filter chamber and the inner diameter of the lower part of the filter chamber.

10. The wireless inclinometer while drilling with the self-cleaning filter mechanism of the wireless inclinometer while drilling as claimed in any one of claims 1 to 9 comprises a body (100), wherein the upper end of the body (100) is provided with a supporting disc (110), and the interior of the body is provided with a central rod (120), and is characterized in that the supporting disc (2) is connected with the supporting disc (110), and the connecting shaft (3) is connected with the central rod (120).

Technical Field

The invention relates to the field of petroleum drilling equipment, in particular to a self-cleaning filtering mechanism of a wireless inclinometer while drilling and the wireless inclinometer while drilling.

Background

Currently, wireless inclinometers while drilling are commonly used in the oil drilling and drilling industry. The filter screen of the wireless inclinometer while drilling is used as a component for filtering impurities of drilling fluid flowing into the pulse generator of the wireless inclinometer while drilling, and the reliability of the use of the filter screen becomes a problem which is more concerned by oilfield users. The filter screen of the general wireless inclinometer while drilling adopts a slotting and perforating mode to filter impurities in drilling fluid, has no active cleaning function, and in use, the impurities in the drilling fluid can slowly block the gaps of the filter screen body, and particularly, when the impurity content in the drilling fluid is high, the filter screen is quickly blocked, so that the wireless inclinometer while drilling can not normally work.

Disclosure of Invention

The invention aims to solve the technical problem of providing a self-cleaning filtering mechanism of a wireless inclinometer while drilling and the wireless inclinometer while drilling, which can prevent the filtering mechanism from being blocked.

The technical scheme adopted by the invention for solving the technical problem is as follows: the self-cleaning filtering mechanism of the wireless inclinometer while drilling comprises a supporting seat, a filter cartridge and a connecting shaft, wherein the supporting seat is provided with a central through hole, a filter cavity is arranged in the filter cartridge, the top of the filter cartridge is sealed, and the bottom of the filter cartridge is connected with the supporting seat; the connecting shaft penetrates through the supporting seat and extends to the top of the filter cavity of the filter cartridge, and the central through hole and the filter cavity are in clearance fit with the connecting shaft; the top of the filter cylinder is provided with an axial strip-shaped filter groove, a flow passage axially extending to the lower end of the connecting shaft is arranged in the connecting shaft, and the flow passage is communicated with the filter cavity; the outer wall of the connecting shaft is provided with blades, and the blades are positioned in the strip-shaped filter cells and are in clearance fit with the strip-shaped filter cells.

Further, the bar-shaped filter cells are multiple, the outer wall of the connecting shaft is provided with multiple blades, and each blade is located in one bar-shaped filter cell.

Furthermore, the runner penetrates through the connecting shaft, so that the upper port of the runner is connected with the filter cavity.

Furthermore, the lateral wall of connecting axle is provided with the drainage hole of radial intercommunication runner and filter chamber.

Further, the lateral wall of cartridge filter is provided with a plurality of radial water conservancy diversion holes.

Further, the blade sets up the outer wall at the position sleeve, and the connecting axle is the step shaft, the one end of position sleeve and the laminating of the ladder face of connecting axle, the other end passes through the jump ring chucking.

Further, the outer wall of the filter cylinder is provided with a loading and unloading groove.

Furthermore, one end of the upper end face of each blade, which is far away from the connecting shaft, is provided with an upper inclined face, one end of the lower end face of each blade, which is far away from the connecting shaft, is provided with a lower inclined face, and the upper inclined face and the lower inclined face and the filter cylinder axially enclose an angle of 40-60 degrees; the radial length of the upper inclined plane and the lower inclined plane is larger than the thickness of the strip-shaped filter cell.

Furthermore, the filter cavity of the filter cartridge is a stepped hole, the diameter of the upper part of the filter cavity is smaller than that of the lower part of the filter cavity, and the diameter of the upper part of the filter cavity is larger than the distance from the outer edge of the blade to the center line of the filter cartridge.

The wireless inclinometer while drilling with the self-cleaning filtering mechanism comprises a body, wherein a supporting plate is arranged at the upper end of the body, a central rod is arranged in the body, the supporting seat is connected with the supporting plate, and the connecting shaft is connected with the central rod.

Compared with the prior art, the invention has the beneficial effects that: during the use, this automatically cleaning filter mechanism's connecting axle links to each other with well core rod of wireless inclinometer while drilling, and well core rod of wireless inclinometer while drilling can drive the connecting axle along axial reciprocating motion to drive the blade on the connecting axle along axial reciprocating motion, the blade just can be fallen with the impurity clearance in the bar filter bowl at the in-process of motion, prevents that impurity in the drilling fluid from stifled dying the bar filter bowl, improves the reliability that wireless inclinometer while drilling filter mechanism used.

Drawings

FIG. 1 is a schematic cross-sectional view of a wireless inclinometer while drilling according to the present invention;

FIG. 2 is a schematic external front view of the self-cleaning filter mechanism of the present invention;

FIG. 3 is a schematic top view of a blade;

FIG. 4 is a schematic view of the shape of a blade;

FIG. 5 is an enlarged view of portion A of FIG. 1;

reference numerals: 1-a filter cartridge; 11-strip filter cells; 12-loading and unloading groove; 13-diversion holes; 2, a support seat; 3, connecting the shaft; 31-a flow channel; 32-drainage holes; 41-blade; 42, positioning sleeves; 43 — upper bevel; 44-lower slope; 5, clamping springs; 100-a body; 110-a support disc; 120-a center pole; beta is the angle between the upper inclined plane and the lower inclined plane and the axial direction of the filter cylinder; t 1-thickness of the strip filter cell; t 2-radial length of the upper and lower ramps; t3 — outer edge diameter of blade; t 4-the outer diameter of the upper part of the filter chamber; t 5-lower inner diameter of filter chamber; t 6-length of the strip filter cell; t7 — thickness of blade; t 8-width of the strip Filter cell.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

The self-cleaning filtering mechanism of the wireless inclinometer while drilling comprises a supporting seat 2, a filter cartridge 1 and a connecting shaft 3, wherein the supporting seat 2 is provided with a central through hole, the filter cartridge 1 is internally provided with a filter cavity, the top of the filter cartridge 1 is sealed, and the bottom of the filter cartridge 1 is connected with the supporting seat 2; the connecting shaft 3 penetrates through the supporting seat 2 and extends to the top of the filter cavity of the filter cartridge 1, and the central through hole and the filter cavity are in clearance fit with the connecting shaft 3; the top of the filter cartridge 1 is provided with an axial strip-shaped filter groove 11, a runner 31 axially extending to the lower end of the connecting shaft 3 is arranged in the connecting shaft 3, and the runner 31 is communicated with the filter cavity; the outer wall of connecting axle 3 is provided with blade 41, blade 41 be located bar filter cell 11 and with bar filter cell 11 clearance fit for blade 41 can remove in bar filter cell 11, thereby scrapes off remaining impurity in the bar filter cell 11.

Supporting seat 2 is used for installing cartridge filter 1 on wireless inclinometer along with boring, and supporting seat 2 can be with cartridge filter 1 integrated into one piece, welded connection or threaded connection. The filter cartridge 1 is used for filtering drilling fluid and preventing impurities in the drilling fluid from entering the wireless inclinometer while drilling. In order to realize the filtering function, the top of the filter cartridge 1 is provided with an axial strip-shaped filter cell 11, drilling fluid can enter a filter cavity through the strip-shaped filter cell 11, a connecting shaft 3 is arranged in order to guide the drilling fluid to the wireless inclinometer while drilling, a flow passage 31 of the connecting shaft 3 is communicated with the filter cavity, and the drilling fluid in the filter cavity can flow into the wireless inclinometer while drilling along the flow passage 31. In addition, the connecting shaft 3 can be connected with a central rod 120 of the wireless inclinometer while drilling, and along with the reciprocating motion of the central rod 120, the connecting shaft 3 drives the blades 41 to reciprocate when moving, so that the blades 41 can scrape off impurities staying in the strip-shaped filter cells 11, and the situation that the strip-shaped filter cells 11 are blocked due to continuous accumulation of the impurities is avoided.

The number of the strip-shaped filter cells 11 can be 1, in order to improve the filtering efficiency, the strip-shaped filter cells 11 are plural, specifically, 2, 3, 6, etc., preferably, 4, and are uniformly distributed on the side wall of the filter cartridge 1, and similarly, the outer wall of the connecting shaft 3 is provided with a plurality of blades 41, the number of the blades 41 is the same as that of the strip-shaped filter cells 11, so that each blade 41 is located in one strip-shaped filter cell 11.

The flow channel 31 may be a blind hole in the connecting shaft 3, and the orifice is located at the lower end of the connecting shaft 3 and is communicated with the filter cavity through a connecting hole arranged on the side wall of the connecting shaft 3, as a preferred embodiment: the flow passage 31 penetrates through the connecting shaft 3, so that the upper end opening of the flow passage 31 is connected with the filter cavity. In addition, in order to improve the efficiency of the drilling fluid entering the flow channel 31, the side wall of the connecting shaft 3 is provided with three drainage holes 32 which radially communicate the flow channel 31 with the filter cavity, and the number of the drainage holes 32 is preferably three, so that the erosion of the drilling fluid flowing into the filter cartridge 1 to the inner wall of the filter cartridge 1 and the connecting shaft 3 can be reduced.

In order to increase the flow passage area of the drilling fluid entering the filter chamber, the side wall of the filter cartridge 1 is provided with a plurality of radial guide holes 13. The flow guide holes 13 are communicated with the filter cavity and the external space, and drilling fluid can enter the filter cavity through the flow guide holes 13, so that the passage area of the drilling fluid entering the filter cavity is increased, and the erosion of the drilling fluid to the strip-shaped filter grooves 11 and the blades 41 is reduced.

Blade 41 can directly set up on connecting axle 3, if with connecting axle 3 welded connection or screw connection, preferably, blade 41 sets up the outer wall at a position sleeve 42, and blade 41 and position sleeve 42 integrated into one piece, position sleeve 42 are the cylinder, and connecting axle 3 is the step shaft, the one end of position sleeve 42 and the laminating of the ladder face of connecting axle 3, the other end passes through 5 chucking of jump ring, but quick assembly disassembly.

Since the filter mechanism is an elongated member, which is generally mounted on the filter mechanism by a screw thread, the filter cartridge 1 is easily deformed by rotating the filter cartridge 1 during mounting, and therefore, the outer wall of the filter cartridge 1 is provided with a plurality of loading and unloading grooves 12, and the loading and unloading grooves 12 are uniformly arranged in the circumferential direction. During the installation, adopt an auxiliary sleeve, this auxiliary sleeve's inner wall is provided with the boss, and the boss cooperatees with loading and unloading groove 12, can drive cartridge filter 1 when rotating auxiliary sleeve and rotate to install supporting seat 2 on wireless supporting disk 110 of following the boring inclinometer, avoid cartridge filter 1 to warp.

As shown in fig. 3, 4 and 5, one end of the upper end surface of the blade 41, which is far away from the connecting shaft 3, is provided with an upper inclined surface 43, one end of the lower end surface of the blade 41, which is far away from the connecting shaft 3, is provided with a lower inclined surface 44, the upper section and the lower section of the blade 41 are provided with inclined surfaces, and the blade 41 can push out impurities when moving up and down along the shaft to clean the strip-shaped filter cells 11. Specifically, the upper and lower inclined surfaces 43 and 44 are at an angle β of 40 ° to 60 ° with respect to the axial direction of the filter cartridge 1. Meanwhile, the radial length t2 of the upper and lower inclined surfaces 43 and 44 is greater than the thickness t1 of the strip-shaped filter cells 11.

The filter cavity of the filter cartridge 1 is a stepped hole, the outer diameter t4 of the upper part of the filter cavity is smaller than the inner diameter t5 of the lower part of the filter cavity, and the diameter t3 of the outer edge of the vane 41 is located between the outer diameter t4 of the upper part of the filter cavity and the inner diameter t5 of the lower part of the filter cavity. The length t6 of the strip-shaped filter cell 11 is more than 3 times of the axial length of the blade 41, so that the blade 41 has enough space during the axial movement and the blade 41 is prevented from impacting the upper end of the strip-shaped filter cell 11; on the other hand, the passage area of the drilling fluid flowing into the filter cavity can be ensured, and the erosion of the drilling fluid to the blades 41 is reduced. The thickness t7 of the blade 41 and the width t8 of the strip-shaped filter cell 11 satisfy: 0.9 × t8< t7< t 8.

The wireless inclinometer while drilling of the self-cleaning filtering mechanism of the wireless inclinometer while drilling comprises a body 100, wherein the body 100 adopts various existing wireless inclinometer while drilling structures, a supporting disc 110 is arranged at the upper end of the body 100, a central rod 120 is arranged inside the body 100, a supporting seat 2 is connected with the supporting disc 110, a connecting shaft 3 is connected with the central rod 120, specifically, the supporting seat 2 is in threaded connection with the supporting disc 110, and the connecting shaft 3 is in threaded connection with the central rod 120.

The working principle of the wireless inclinometer while drilling provided by the invention is as follows: after the pulse generator is started, the central rod 120 of the pulse generator can move up and down along the shaft, the central rod 120 drives the connecting shaft 3 to move up and down, so that the blades 41 are driven to move up and down, impurities in the strip-shaped filter cells 11 are cleaned along with the blades 41 along the axial movement, and the strip-shaped filter cells 11 are prevented from being blocked by the impurities in drilling fluid.

The terms "upper", "lower", "inner", "outer", "upper", "lower", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.