阅读说明：本技术 一种抽油泵过桥施压坐封封隔器装置及应用方法 (oil-well pump gap bridge pressing setting packer device and application method ) 是由 呼园平 樊平天 孙敏 孙兴旺 于 2019-12-02 设计创作，主要内容包括：一种抽油泵过桥施压坐封封隔器装置及应用方法,封隔器下部安装工艺尾管,封隔器上部依次安装工艺油管、抽油泵过桥施压坐封装置、改进的抽油泵固定阀、抽油泵。修井作业完成管串下井后,此时改进的固定阀阀球在抽油泵过桥施压坐封装置支撑下为开启状态,坐封封隔器需要的压井液通过抽油泵过桥施压坐封装置传至封隔器,此时地面泵车加压完成封隔器坐封；下抽油泵柱塞及杆柱与现有工艺相同,下至预定深度碰泵,柱塞下压球阀上部压杆推动阀球、顶杆、塞体下行剪断工艺定位顶丝,此时推簧伸长使顶杆远离阀座,阀球自由坐封,之后调柱塞防冲距,抽油泵正常运行。以此实现下抽油泵和坐封封隔器一趟管柱完成的工艺目的。(A packer device of oil pump gap bridge pressing setting and its application method, the lower part of packer is installed with process tail tube, the upper part of packer is installed with process oil tube, gap bridge pressing setting device of oil pump, improved oil pump fixing valve, oil pump, after the workover operation is finished, the improved fixing valve ball is opened under the support of gap bridge pressing setting device of oil pump, the well pressing liquid needed by setting packer is transmitted to packer through gap bridge pressing setting device of oil pump, at this time, the ground pump vehicle is pressed to finish packer setting, the plunger and rod of lower oil pump are the same as the existing technology, the pump is hit to the preset depth, the plunger presses down the upper part of ball valve to push valve ball, ejector rod, plug body to cut off the process positioning jackscrew, at this time, the spring is pushed to extend to make the ejector rod far away from valve seat, the valve ball is free to set, then the plunger anti-impact distance is adjusted to normally run, thus the process purpose of lowering oil pump and setting packer is realized.)

The packer comprises an oil well pump cylinder (1), an oil well pump plunger (2), an oil well pump traveling valve cover (3), a traveling ball valve pair (4), a plunger plug (5) and an oil well pump lower coupling (6), and is characterized in that a pressure rod process cap (7) is abutted to the plunger plug (5) of the oil well pump assembly and is fastened by the oil well pump lower coupling (6), the pressure rod process cap (7) is connected with a ball valve upper pressure rod (8) through threads, the bottom of the pressure rod process cap is in contact with a ball valve of a ball valve pair (11), the ball valve is pressed on a push rod (12), the excircle of the ball valve upper pressure rod (8) is in sliding fit with an inner hole of a ball cavity of a fixed valve cover (10), the upper end of the pressure rod process cap is provided with external threads, the hole of the fixed valve cover (10) is punched at the center of the upper end face, the hole of the fixed valve cover (10) is in sliding fit with the excircle of the ball valve upper pressure rod (8), a ball valve reset spring (9) is sleeved at the upper portion of the ball valve upper pressure rod press rod (8), the ball valve cover press is in contact with the upper pressure rod (8), the upper end of the ball valve cover press, the oil pipe press rod press-adjusting oil pipe press from the fixed valve cover (10), the fixed valve cover through a fixed valve cover, the oil pipe press-pass bridge, the ball valve cover press-pass through the ball, the ball valve cover, the ball press-pass through the ball press-pass bridge press-pass screw thread press-pass screw joint, the screw-pass screw joint, the screw-pass screw press-pass screw joint, the screw-pass screw joint, the screw-pass screw joint, the screw.

2. The gap bridge pressing setting packer device of oil well pump according to claim 1, wherein the outer diameter of the pressure bar process cap (7) is larger than the plunger plug at the lower end of the straight plug of oil well pump, and the opposite side is processed with a process jaw.

3. The bridge-crossing pressing setting packer device of oil-well pump according to claim 1, wherein the top of the ejector rod (12) is a cambered surface corresponding to the cambered surface of the fixed valve ball, and penetrates through the inner hole of the ball seat of the ball valve sub-seat and is uniformly distributed with liquid passing grooves, the middle part of the ejector rod is provided with an assembly process wrench opening, and the bottom end is provided with threads.

4. The kind of oil-well pump bridge-crossing pressing setting packer device of claim 1, wherein, the ejector pin adjusting nut (14) has the same specification with the ejector pin (12), the connecting ejector pin coupling (15), the plug body (17) thread, two end faces are contacted with the upper end face of the ejector pin (12) and the connecting ejector pin coupling (15), and the processing wrenching openings are evenly distributed at the excircle position.

5. The kind of oil-well pump gap bridge pressing setting packer device of claim 1, wherein, the connection ejector rod coupling (15) is through-hole internal thread, the same specification with ejector rod (12), cock body (17) screw thread, two terminal surfaces contact with ejector rod adjusting nut (14), cock body (17) respectively, process the jaw in the excircle position equipartition.

6. The type gap bridge pressing setting packer device of oil well pump according to claim 1, wherein the plug body (17) has an upper end with external screw thread connected with the internal screw thread of the connecting mandril coupling (15), the extension rod near the external screw thread is provided with a jaw which is matched with the gap bridge pressure transmitting joint (19) in a sliding way, the push spring (18) is installed at the cavity between the plug body (17) and the gap bridge pressure transmitting joint (19), and the external circle of the plug body (17) is provided with three sealing grooves.

7. The oil-well pump gap bridge pressing setting packer device according to claim 1, wherein the gap bridge pressure transmission joint (19) has oil pipe threads at both ends of its outer circle in clearance fit with the plug body (17), an internal O-ring (21) with an installation thread at the end of its inner bore, and two crescent liquid passing grooves symmetrically machined at the pipe wall between the inner bore and the outer circle.

8, application method of oil-well pump gap bridge pressure setting packer, its characterized in that, includes the following steps:

after the tubing string is put into the well, a pump truck pours water into the tubing string from a well mouth, when an oil well pump is connected with a bridge pressing setting device, a top rod (12) of the bridge pressing setting device supports a valve ball to be in an open state, water in the tubing string flows to a packer position through two crescent bridge liquid passing holes and a process oil pipe preset by a bridge pressing joint (19) through a channel between the valve ball and a valve seat, the ground pump truck continues to press a packer positioning shear pin to be cut off, a sliding sleeve moves the packer to set, at the moment, the pressure is stopped to observe the connection quality of the tubing string, the pressure is continued to be pressed after sections of pressure stabilization, the sliding sleeve shear pin is cut off, an oil pipe above the packer is communicated with a sleeve, after the tubing string is put into the well, the packer setting test and tubing string communication test are completed, a polish rod, a sucker rod and a sucker rod of an oil pump are connected from top to bottom according to bottom as required, a sucker rod and a plunger of the oil pump is used for carrying out a rod column descending process, a plunger plug (5) at the lower end of the oil well, a plunger plug of the oil well, a plunger string pressing setting device is connected with a pressure rod, a pressure rod of the ball pump plug (7) of the ball pump string pressing setting device, a plunger plug (17) is synchronously pushed, a plunger plug (17) and a plunger plug (17) of the ball pump string, a plunger plug is connected with a plunger plug (17), a plunger plug (17) of the ball valve plug is connected with a plunger plug, a plunger plug (17) of a plunger plug is connected with a plunger plug, a plunger.

Technical Field

The invention belongs to the technical field of operation construction, and particularly relates to an oil-well pump gap bridge pressing setting packer device and an application method thereof.

Background

In the production process of petroleum and natural gas exploration and development, various packers are very -flood and play a vital role in the aspects of petroleum exploration, development and production and the like, at present, partial oil fields in China enter a secondary development oil extraction stage, individual oil fields already enter a tertiary development oil extraction stage, and the water content ratio of crude oil is very high.

Therefore, the research on process methods for installing the packer and running the oil well pump to implement pipe columns shortens the workover period, reduces the workover cost, and reduces the environmental pollution and the potential safety hazard is the inevitable trend of the development of the oil exploration and development technology.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide oil-well pump gap bridge pressing setting packer devices and application methods, wherein a -time pipe string connecting process is adopted for installing a packer and a lower oil-well pump during workover treatment, a process tail pipe is installed at the lower part of the packer, a process oil pipe, an oil-well pump gap bridge pressing setting device, an improved oil-well pump fixed valve and an oil-well pump are sequentially installed at the upper part of the packer, after the workover treatment is completed and a pipe string goes down the well, the improved fixed valve ball is in an open state under the support of the oil-well pump gap bridge pressing setting device, well killing liquid required by the setting packer is transmitted to the packer through the oil-well pump gap bridge pressing setting device, the ground pump truck is pressurized to complete the setting of the packer, a pumping plunger and a rod column of the lower pump are the same as the prior art, the lower part is touched to a preset depth, the upper part of the plunger is pressed down on the ball to push the valve ball, the push the rod to cut a positioning jackscrew.

In order to achieve the purpose, the invention adopts the technical scheme that:

A packer device for oil well pump gap bridge pressing setting comprises an oil well pump cylinder (1), an oil well pump plunger (2), an oil well pump traveling valve cover (3), a traveling ball valve pair (4), a plunger plug (5) and an oil well pump lower coupling (6) which form an oil well pump assembly, a pressure rod process cap (7) is abutted to the plunger plug (5) of the oil well pump assembly and is fastened by the oil well pump lower coupling (6), the pressure rod process cap (7) is connected with a ball valve upper pressure rod (8) through a thread, the bottom of the pressure rod process cap is in contact with a ball valve of a ball valve pair (11), the ball valve is pressed on a push rod (12), the excircle of the ball valve upper pressure rod (8) is in sliding fit with an inner hole of a ball cavity of a fixed valve cover (10), the upper end of the pressure rod process cap is provided with an external thread, the fixed valve cover (10) is provided with a hole in the center of the upper end face, the hole of the fixed valve cover is in sliding fit with the excircle of the ball valve upper pressure rod (8), a ball valve reset spring (9) is sleeved at the upper portion of the ball valve upper pressure rod upper portion of the ball valve, the end of the ball valve cover is in contact with a shoulder of the ball valve upper pressure rod press rod (8), the ball valve cover, the end of the ball valve press rod press, the ball valve cover (8), the ball valve cover (10), the ball valve cover press is connected with a ball valve cover press plug (17) through a screw thread, the ball valve cover press plug (17) through a screw thread, the ball press plug, the ball valve cover press plug (17) and a screw.

The outer diameter of the pressure bar process cap (7) is larger than the plunger plug at the lower end of the straight plug of the oil well pump, and a process wrench opening is processed on the opposite side.

The upper end of the ejector rod (12) is an arc surface and a fixed valve ball arc surface , the upper end of the ejector rod penetrates through an inner hole of the ball valve auxiliary ball seat and is uniformly distributed with liquid passing grooves, the middle part of the ejector rod is provided with an assembly process pull opening, and the lower end of the ejector rod is provided with threads.

The inner thread of the mandril adjusting screw cap (14) has the same specification of with the mandril (12), the connecting mandril coupling (15) and the plug body (17), the two end surfaces of the mandril adjusting screw cap are respectively contacted with the upper end surfaces of the mandril (12) and the connecting mandril coupling (15), and the processing wrenching openings are uniformly distributed at the outer circle part.

The connecting ejector rod coupling (15) is a through hole internal thread, has the same specifications with the threads of the ejector rod (12) and the plug body (17), has two end surfaces respectively contacted with the ejector rod adjusting screw cap (14) and the plug body (17), and is uniformly provided with processing wrenching openings at the excircle part.

The external screw thread of cock body (17) upper end and connecting ejector pin coupling (15) female connection, nearly screw thread excircle extension bar position is equipped with the jaw, with gap bridge pressure transmission joint (19) sliding fit, pushes away the cavity position between spring (18) installation cock body (17) and gap bridge pressure transmission joint (19), three seal grooves of cock body (17) excircle processing.

Oil pipe threads are arranged at two ends of the excircle of the gap bridge pressure transmission joint (19) and are in clearance fit with the plug body (17), an O-shaped sealing ring (21) is arranged inside the gap bridge pressure transmission joint, and mounting process threads are arranged at the tail end of an inner hole; and two crescent liquid through grooves are symmetrically processed at the pipe wall part between the inner hole and the outer circle.

method for applying oil pump gap bridge pressure setting packer, comprising the following steps:

after the tubing string is put into the well, a pump truck pours water into the tubing string from a well mouth, when an oil well pump is connected with a bridge pressing setting device, a top rod (12) of the bridge pressing setting device supports a valve ball to be in an open state, water in the tubing string flows to a packer position through two crescent bridge liquid passing holes and a process oil pipe preset by a bridge pressing joint (19) through a channel between the valve ball and a valve seat, the ground pump truck continues to press a packer positioning shear pin to be cut off, a sliding sleeve moves the packer to set, at the moment, the pressure is stopped to observe the connection quality of the tubing string, the pressure is continued to be pressed after sections of pressure stabilization, the sliding sleeve shear pin is cut off, an oil pipe above the packer is communicated with a sleeve, after the tubing string is put into the well, the packer setting test and tubing string communication test are completed, a polish rod, a sucker rod and a sucker rod of an oil pump are connected from top to bottom according to bottom as required, a sucker rod and a plunger of the oil pump is used for carrying out a rod column descending process, a plunger plug (5) at the lower end of the oil well, a plunger plug of the oil well, a plunger string pressing setting device is connected with a pressure rod, a pressure rod of the ball pump plug (7) of the ball pump string pressing setting device, a plunger plug (17) is synchronously pushed, a plunger plug (17) and a plunger plug (17) of the ball pump string, a plunger plug is connected with a plunger plug (17), a plunger plug (17) of the ball valve plug is connected with a plunger plug, a plunger plug (17) of a plunger plug is connected with a plunger plug, a plunger.

The invention has the beneficial effects that:

1) in application, in order to realize the function of pressing the gap bridge, the center part of the fixed valve cover is perforated, a pressure rod on the upper part of the ball valve passes through the center part, the fixed valve does not influence the original function in application, the gap bridge pressure transmission can be assisted, and a ball valve reset spring pushes a valve ball to quickly seat and seal so as to improve the pump efficiency;

2) in order to avoid the valve ball from moving along the axis when colliding with a pump in application, the outer diameter of the process cap is larger than the plunger plug at the lower end of the straight plug of the oil well pump, and a process jaw is processed at the opposite side, so that the process cap is easy to install and firm;

3) in application, the ejector rod is slender and needs to be connected with the plug body, the arc surface at the upper end of the ejector rod is meshed with the valve ball arc, and the processing wrenches are uniformly distributed at the outer circle part and are easy to install and firm. The lower end thread of the ejector rod is connected with the plug body through an ejector rod adjusting nut and a connecting ejector rod coupling, and the plug body is synchronously pushed to move downwards to realize the purpose of setting the valve ball in application;

4) in order to prevent the plunger from bumping the pump to push the service ball to move downwards, the plug body is still in contact with the valve ball to influence the setting effect, a push spring is arranged at the coaxial shoulder part of the extension rod of the plug body and the control spring, the weight of the plunger and the rod column cuts off the process positioning jackscrew when bumping the pump, and the extension distance of the spring can ensure that the upper end of the jackscrew is far away from the ball valve pair, thereby achieving the purpose of normal setting of the fixed valve of the oil well pump;

5) in order to realize the function of pressure transmission through a pump after the gap bridge pressure transmission joint and the plug body are assembled, after the distance between a valve ball and a valve seat is adjusted, holes are punched from the connecting rib position between two crescent liquid through grooves of the gap bridge pressure transmission joint until the gap bridge pressure transmission joint and the plug body are connected and fixed, at the moment, the pair is in an open state (delivery state), and well killing liquid flows through the two crescent liquid through grooves of the pipe wall between the inner hole and the outer circle of the gap bridge pressure transmission joint to achieve the purpose of applying pressure to the packer. During installation, a tool is fixed at the threaded part of the lower part of the plug body, the plug body is installed into the gap bridge pressure transmission joint by rotating the screw rod to compress the push spring, and the gap bridge pressure transmission joint is fixed after adjusting the distance between the valve ball and the valve seat, so that the purpose that the well killing fluid passes through the ball valve pair at the moment is achieved;

the invention can meet the process requirements of various tubular oil well pumps for pressurizing and setting the packer once the pipe column is completed, and the application range is more ;

in a word, the invention can meet the technological requirements of pipe columns, effectively shorten the construction period of workover operation, effectively reduce the cost of workover, and meet the requirement of fine management of workover operation.

Drawings

FIG. 1 is a half-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the stem lifter of the present invention;

FIG. 3 is a schematic view of the carrier rod adjustment nut of the present invention;

FIG. 4 is a cross-sectional view A-A of the coupling mandrel collar of the present invention;

FIG. 5 is a schematic view of a process positioning jackscrew structure according to the present invention.

Wherein, 1 is a pump cylinder of an oil well pump; 2 is the oil pump plunger; 3 is a traveling valve cover of the oil well pump; 4 is a traveling ball valve pair; 5 is a plunger plug; 6 is the lower coupling of the oil well pump; 7 is a pressure bar process cap; 8 is a ball valve upper pressure lever; 9 is a ball valve return spring; 10 is a fixed valve cover; 11 is a ball valve pair; 12 is a mandril; 13 is a fixed valve reducing joint; 14 is a mandril adjusting screw cap; 15 is a connecting mandril coupling; 16 is a buckle changing joint; 17 is a plug body; 18 is a push spring; 19 is a gap bridge pressure transmission joint; 20, positioning a jackscrew by a process; 21 is an O-shaped sealing ring.

Detailed Description

The invention is further described in conjunction with the following figures.

The packer comprises an oil well pump barrel (1), an oil well pump plunger (2), an oil well pump traveling valve cover (3), a traveling ball valve pair (4), a plunger plug screw plug (5), an oil well pump lower coupling (6), a pressure rod process cap (7), a ball valve upper pressure rod (8), a ball valve reset spring (9), a fixed valve cover (10), a ball valve pair (11), an ejector rod (12), a fixed valve reducing joint (13), an ejector rod adjusting nut (14), a connecting ejector rod coupling (15), a change buckle joint (16), a plug body (17), a push spring (18), an overbridge pressure transfer joint (19), a process positioning ejector rod (20) and an O-shaped sealing ring (21) which are all formed by assembling a ball valve passing through hole, an outer diameter of the ball pump ball plug screw plug, a process pull rod, a push rod, a ball valve upper end face of the ball valve plug screw plug, a push rod, a ball valve seat, a ball valve plug screw plug, a plug screw plug, a ball plug screw plug, a ball valve seat, a ball plug, a ball valve, a ball plug, a ball valve, a ball plug, a ball valve, a ball plug, a ball valve, a ball plug, a ball valve, a ball plug, a ball.

A method for applying a packer with a bridge-crossing pressure-applying setting function for an oil-well pump, when a string connection process is performed during workover, a pump truck injects water into a string from a well head after a string connection process is completed, when the oil-well pump is connected with a bridge-crossing pressure-applying setting device, a process oil pipe, a packer, a tail pipe, a plug and the like, two crescent bridge liquid passing holes and a process oil pipe preset by a bridge pressure-transmitting connector (19) flow to the packer position through a passage between the valve ball and a valve seat when the oil-well pump is connected with the bridge-crossing pressure-applying setting device, the ground pump truck continues to apply pressure to the packer positioning shear a shear pin after the packer setting is moved, the quality of the string connection is observed at the time when the pressure is stopped, the pressure continues to be applied after a stable pressure period, the sliding sleeve shear pin is sheared, the packer shearing is communicated with the sleeve, the packer is communicated with the packer string, the packer is connected with a plunger string lower string, the packer, the string sealing string is sealed, the string is tested, the string is connected with a plug, the plug is connected with a plunger plug, a plunger plug and a plunger plug, a plunger plug is connected with a plunger plug, a plug is connected with a plug, a plug.

After the well repairing operation is finished and the pipe string goes into the well, the valve ball of the ball valve pair (11) is in an open state under the support of a mandril (12) of a mandril assembly, well killing liquid required by a setting packer is transferred to the packer between two crescent liquid passing grooves of a bridge pressure transfer joint (19) of an oil well pump bridge pressure applying setting device, a ground pump truck is pressurized to finish the setting of the packer, a lower oil pump plunger and a rod column are the same as the prior art and touch a pump to a preset depth, the oil pump plunger (2) presses a pressure rod process cap (7) on the upper portion of the ball valve downwards to push the valve ball, the valve ball pushes the mandril assembly downwards, a plug body (17) on the mandril assembly and the bridge pressure transfer joint (19) move relatively to cut a process positioning jackscrew (20), the push spring (18) extends to enable the mandril assembly to be far away from a valve seat, the valve ball is freely set, then the plunger is adjusted in an anti-impact distance, and the oil well pump normally operates, so that the process purpose of.

The improved fixed valve assembly comprises a pressure lever process cap (7), a pressure lever on the upper portion of a ball valve (8), a ball valve reset spring (9), a fixed valve cover (10), a ball valve pair (11) and a fixed valve reducing joint (13), wherein the outer diameter of the pressure lever process cap (7) is larger than that of a plunger plug at the lower end of a straight plug of an oil well pump, process wrenching openings are formed in opposite sides of the pressure lever process cap, the arc surface at the lower end of the pressure lever on the upper portion of the ball valve (8) is similar to the fixed valve arc surface , the ball valve reset spring (9) is in the prior art, oil pipe threads are arranged on the outer circle of the upper end of the fixed valve cover (10), holes are formed in the center of the upper end face, the hole diameter is in sliding fit with the outer circle of the pressure lever on the upper portion of the ball valve (8), oil pumping liquid flow passage holes are uniformly distributed in a lotus root shape in the eccentric portion of the upper end face and are communicated with.

The ejector rod assembly is formed by connecting the ejector rod (12), the ejector rod adjusting nut (14), the connecting ejector rod coupling (15) and the plug body (17) through threads. The plug body (17) at the bottom of the ejector rod assembly and the gap bridge pressure transmission joint (19) are positioned and fixed through a process positioning jackscrew (20), and the plug body (17) and a push spring (18) in the gap bridge pressure transmission joint (19) are in a compressed state.

The upper end cambered surface of the ejector rod (12) is equal to of the fixed valve ball cambered surface, the maximum diameter part is smaller than the inner hole of the ball valve auxiliary ball seat and is uniformly distributed and processed with liquid passing grooves, the middle part of the ejector rod is provided with an assembly process pull opening, and the lower end is provided with external threads for installing an ejector rod adjusting nut (14) and connecting an ejector rod coupling (15).

The inner thread of the mandril adjusting screw cap (14) has the same specification of with the mandril (12), the connecting mandril coupling (15) and the plug body (17), the two end surfaces of the mandril adjusting screw cap are respectively contacted with the shoulder of the mandril (12) and the upper end surface of the connecting mandril coupling (15), and the processing wrenching openings are uniformly distributed at the outer circle part.

The connecting ejector rod coupling (15) is a through hole internal thread, has the same specifications with the threads of the ejector rod (12) and the plug body (17), has two end surfaces respectively contacted with the ejector rod adjusting screw cap (14) and the plug body (17), and is uniformly provided with processing wrenching openings at the excircle part.

Stopper body (17) upper end external screw thread and connection ejector pin coupling (15) internal thread connection, nearly screw thread excircle extension bar position is equipped with the wrench mouth, extension bar position and the cross bridge of the coaxial circular bead position of control spring pass pressure joint (19) hole sliding fit, push away cavity position between spring (18) installation stopper body (17) coaxial circular bead of control spring and the cross bridge pass pressure joint (19), nearly control spring coaxial circular bead maximum diameter position excircle processing three seal grooves, O type sealing washer (21) are arranged in wherein, stopper body (17) maximum diameter position and cross bridge pass pressure joint (19), reach sealed effect through O type sealing washer (21).

Oil pipe threads are arranged at two ends of the excircle of the gap bridge pressure transmission joint (19), the through hole is in sliding fit with the lengthening rod part of the plug body (17), the reaming shoulder part is in clearance fit with the maximum diameter part of the plug body (17), the sealing effect is achieved through an O-shaped sealing ring (21), and the tail end of an inner hole is provided with mounting process threads; and two crescent liquid through grooves are symmetrically processed at the pipe wall part between the inner hole and the outer circle.

The process positioning jackscrew is used for punching holes from the connecting rib position between the two crescent liquid passing grooves of the gap bridge pressure transmission joint after being assembled and positioned until being connected and fixed with the plug body.

As shown in attached figures 1 and 2, the ejector rod (12) pushes a valve ball of the ball valve pair (11) away from a valve seat when the packer is not set, so that the function of communicating the oil pipe column up and down is realized. After the packer is set, the oil well pump is put down and the pump is bumped, stress is transmitted to the plug body (17) to complete the shearing of the process positioning jackscrew (20), and the valve ball of the push spring (18) reset ball valve pair (11) falls on the valve seat to complete the setting function.

The distance between the mandril (12) and the plug body (17) can be adjusted and tightly connected by the mandril adjusting nut (14) on the mandril assembly shown in the attached figures 1 and 3. The distance between the mandril (12) and the plug body (17) is adjusted by adjusting the screw thread of the mandril (12) screwed into the connecting mandril coupling (15), and the mandril adjusting screw cap (14) is rotated after the distance is adjusted to realize the fastening effect of the connecting screw thread.

The connection between the mandrel collar (15) and the mandrel (12) and the plug body (17) is realized as shown in the attached figures 1 and 4. After the push spring (18) is reset, the mandril assembly moves downwards, the outer end face of the mandril coupling (15) is connected with the outer end of the gap bridge pressure transmission joint (19), and the connecting rod assembly is prevented from falling to the bottom of the well.

As shown in attached figures 1 and 5, the gap bridge pressure transmission joint (19) and the plug body (17) realize the limit through a process positioning jackscrew (20) before the packer is unset. After the push spring (18) is reset, the gap bridge pressure transmission joint (19) plays a role in limiting the displacement of the connecting ejector rod coupling (15). The crescent liquid passing groove on the gap bridge pressure transmission joint (19) plays a role in communication.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.