CN217055080U - Hydraulic booster for oil and gas well fishing - Google Patents

Abstract

The utility model relates to an oil gas field instrument technical field in the pit specifically is an oil gas well is salvaged and is used hydraulic pressure booster, include from a left side to the right consecutive top connection, piston cylinder and drive cover, the inside of top connection, piston cylinder and drive cover is equipped with center tube, piston shaft and actuating lever respectively, goes up center tube, piston shaft and actuating lever end to end in proper order, goes up the inside of center tube, piston shaft and actuating lever and has seted up the cavity passageway jointly. The utility model discloses a water pressure drive piston shaft lifts the fish, has seted up pressure balance hole on the piston cylinder simultaneously, consequently the utility model discloses a can repeatedly lift the fish many times, the conventional art that compares, the utility model discloses a piston shaft stroke is bigger.

Description

Hydraulic booster for oil and gas well fishing

Technical Field

The utility model relates to an oil gas field instrument technical field in the pit specifically is an oil gas well is salvaged and is used hydraulic pressure booster.

Background

At present, in the development process of oil and gas fields, well repair is necessary, and the well repair is divided into minor repair and major repair, and the major repair is caused by the following reasons: poor cementing quality, formation water corrosion and later reservoir transformation may cause the casing to deform; it is also possible that the tubing string is stuck because the annulus completion fluid has impurities or the completion fluid is corrosive, and the resulting impurities accumulate on the packer. The lifting load of the workover rig is greatly increased due to the fact that the pipe column is clamped, the fault can be relieved only by replacing the heavy-load workover rig when necessary, the cost is inevitably increased by using the heavy-load workover rig, and the construction period is delayed.

In the prior art, in order to perform pipe string unfreezing, a special unfreezing device is provided, and the existing unfreezing device comprises a hydraulic anchor and a hydraulic booster, wherein the hydraulic anchor is used for being fixed on the inner wall of a casing pipe, and the hydraulic booster is used for lifting a pipe string. However, the lifting stroke of a piston shaft of the existing hydraulic booster is limited, and the work of releasing the jam is difficult to finish at one time; meanwhile, the lifting force of the existing piston shaft is limited, and when the releasing force required by fish exceeds the maximum pulling force of the hydraulic booster, the existing hydraulic booster is difficult to release the fish. Therefore, the hydraulic booster for oil and gas well fishing is provided to well solve the defects.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil gas well is salvaged and is used hydraulic pressure booster for solve the problem that proposes among the above-mentioned background art.

The utility model discloses a can realize through following technical scheme: a hydraulic booster for oil and gas well fishing comprises an upper joint, a piston cylinder and a driving sleeve which are sequentially connected from left to right, wherein an upper central pipe, a piston shaft and a driving rod are respectively arranged in the upper joint, the piston cylinder and the driving sleeve;

the piston cylinder is of a two-section structure consisting of a first cylinder body and a second cylinder body, the inner diameter of the first cylinder body is larger than that of the second cylinder body, a pressure balance hole penetrates through the side wall of the first cylinder body, the piston shaft is of a two-section structure consisting of a piston head and a piston rod, the diameter of the piston head is matched with that of the first cylinder body, the diameter of the piston rod is matched with that of the second cylinder body, a pressure transmission hole penetrates through the side wall of the piston rod and the position close to the piston head, and a pressurization cavity is defined between the piston rod and the first cylinder body;

and a lower joint is arranged at one end of the driving rod, which is far away from the piston shaft, and a sealing channel communicated with the hollow channel is arranged in the lower joint.

Preferably, a first sealing ring is fixedly embedded outside the piston head, and the first sealing ring is tightly attached to the inner wall of the first cylinder body.

Preferably, a second sealing ring is fixedly embedded in the inner wall of the upper joint, and the second sealing ring is tightly attached to the outer wall of the upper central pipe.

Preferably, a third sealing ring is fixedly embedded in the inner wall of the second cylinder body, and the third sealing ring is tightly attached to the outer wall of the piston rod.

Preferably, the sealing device further comprises a steel ball, the diameter of the steel ball is smaller than the inner diameter of the hollow channel, and the diameter of the steel ball is larger than the inner diameter of the middle section of the sealing channel.

Compared with the prior art, the utility model provides an oil gas well is salvaged and is used hydraulic pressure booster possesses following beneficial effect:

1. the fish lifting device lifts the fish on the piston shaft through water pressure driving, and meanwhile, the piston cylinder is provided with the pressure balance hole, so the fish lifting device can lift the fish repeatedly, and compared with the traditional technology, the stroke of the piston shaft of the fish lifting device is larger;

2. the utility model discloses a form by the concatenation of upper clutch, piston cylinder and drive cover isotructure, wherein the quantity of piston cylinder is a plurality of, and the quantity of piston cylinder is more, and the pulling force that lifts of actuating lever is big more, consequently compares the conventional art, the utility model discloses a lifting force is bigger.

Drawings

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

fig. 2 is a schematic structural view of the hydraulic anchor of the present invention;

fig. 3 is a cross-sectional view of the hydraulic anchor of the present invention;

FIG. 4 is an enlarged view corresponding to E in FIG. 3;

FIG. 5 is an enlarged corresponding view at F in FIG. 3;

fig. 6 is a schematic structural view of the hydraulic booster of the present invention;

fig. 7 is a schematic view of another state of the hydraulic booster of the present invention;

FIG. 8 is an enlarged corresponding view taken at A in FIG. 6;

FIG. 9 is an enlarged corresponding view at B in FIG. 6;

FIG. 10 is an enlarged corresponding view at C of FIG. 6;

fig. 11 is an enlarged corresponding view at D in fig. 7.

In the figure: 100. a hydraulic anchor; 1. a mandrel; 2. mounting grooves; 3. slips; 301. a guide block; 302. a limiting tooth socket; 303. anti-skid lines; 4. a pushing mechanism; 401. a thrust piston; 402. installing a panel; 403. a return spring; 5. a limiting groove; 6. a movable ferrule; 601. a positioning ring; 7. a through hole; 8. positioning blocks; 900. a hydraulic booster; 9. an upper joint 10 and a piston cylinder; 101. a first cylinder; 102. a second cylinder; 11. a drive sleeve; 12. an upper central tube; 13. a piston shaft; 131. a piston head; 132. a piston rod; 14. a drive rod; 15. a hollow channel; 16. a pressure balance hole; 17. a pressure transfer hole; 18. a pressurizing cavity; 19. a lower joint; 20. sealing the channel; 21. a first seal ring; 22. a second seal ring; 23. a third seal ring; 24. and (5) steel balls.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment is as follows: referring to fig. 1, the present embodiment provides a downhole hydraulic-force-enhanced fishing tool in a casing, which includes a hydraulic anchor 100 and a hydraulic force enhancer 900.

Referring to fig. 2 to 5, the hydraulic anchor 100 includes a mandrel 1, the mandrel 1 is a hollow circular tubular structure, the outer peripheral wall of the mandrel 1 is provided with a plurality of mounting grooves 2 along the axial direction of the mandrel 1, the mounting grooves 2 are distributed uniformly on the outer peripheral wall of the mandrel 1, slips 3 are movably arranged inside the mounting grooves 2, one surface of the slips 3 facing the mounting grooves 2 is uniformly provided with helical-tooth-shaped guide blocks 301, the inner wall of the mounting grooves 2 is provided with guide grooves adapted to the guide blocks 301, and the guide blocks 301 are engaged with the guide grooves; the outer peripheral wall of the mandrel 1 and the left end of the mounting groove 2 are provided with a limiting groove 5, the outer surface of the slip 3 is provided with a limiting tooth groove 302, the outer part of the mandrel 1 is further sleeved with a movable cutting sleeve 6, the left end and the right end of the inner peripheral wall of the movable cutting sleeve 6 are provided with positioning rings 601, the two positioning rings 601 are respectively embedded into the limiting groove 5 and the limiting tooth groove 302, and as shown in fig. 3, the movable cutting sleeve 6 is used for limiting the position of the slip 3 and preventing the slip 3 from falling off from the mounting groove 2; the slips 3 are of arc sheet-shaped structures, the thickness of the right end of the slips 3 is larger than that of the left end of the slips, anti-slip lines 303 are arranged on the outer surface of the right end of the slips 3, and the anti-slip lines 303 are used for improving the friction force between the slips 3 and the inner wall of the sleeve and preventing the slips 3 from slipping on the inner wall of the sleeve; in addition, the length of the mounting groove 2 is greater than that of the slip 3, and the width of the limiting groove 5 is greater than that of the positioning ring 601, so that the slip 3 can slide left and right in the mounting groove 2, and a certain amount of movement is achieved.

A pushing mechanism 4 is further arranged in the mounting groove 2 and close to the right end and used for pushing the right end of the slip 3 outwards; as shown in fig. 4, the pushing mechanism 4 comprises a pushing piston 401 and a mounting panel 402, the mounting panel 402 is fixedly connected to the inner wall of the mounting groove 2 through bolts, the mounting panel 402 is further provided with a mounting hole for mounting the pushing piston 401, and the pushing piston 401 is movably inserted in the mounting hole; a through hole 7 communicated with the interior of the mandrel 1 is formed in the inner wall of the mounting groove 2 in a penetrating manner, and the pushing piston 401 is inserted into the through hole 7; the pushing piston 401 is of a two-section structure, the diameter of the upper section of the pushing piston is smaller than that of the lower section of the pushing piston, a return spring 403 is sleeved outside the upper section of the pushing piston 401, two ends of the return spring 403 are respectively connected with the mounting panel 402 and the upper edge of the lower section of the pushing piston 401, and in the state shown in fig. 4, the return spring 403 is in a stretching state; the inner diameter of the through hole 8 is matched with the outer diameter of the bottom of the pushing piston 401, a positioning block 8 is arranged in the through hole 7 and at one end close to the central shaft of the mandrel 1 and used for blocking the pushing piston 401 from falling into the mandrel 1, so that when the pushing piston 401 is not subjected to external force, the bottom end of the pushing piston 401 is abutted against the positioning block 8, and the top end of the pushing piston 401 is in surface contact with the slip 3.

Referring to fig. 6-11, the hydraulic booster 900 includes an upper joint 9, piston cylinders 10 and a driving sleeve 11 connected in sequence from left to right, as shown in fig. 6, in this embodiment, there are two piston cylinders 10, and two adjacent piston cylinders 10 are connected by screw threads, in addition, the upper joint 9 is fixedly connected with the right end of the mandrel 1, and the inside of the upper joint 9 is communicated with the inside of the mandrel 1; an upper central pipe 12, a piston shaft 13 and a driving rod 14 are respectively arranged inside the upper joint 9, the piston cylinder 10 and the driving sleeve 11, the upper central pipe 12, the piston shaft 13 and the driving rod 14 are sequentially connected end to end, specifically in a threaded connection, and hollow channels 15 are jointly formed inside the upper central pipe 12, the piston shaft 13 and the driving rod 14; the piston cylinder 10 is a two-section structure composed of a first cylinder body 101 and a second cylinder body 102, the first cylinder body 101 and the second cylinder body 102 are integrally formed, the inner diameter of the first cylinder body 101 is larger than that of the second cylinder body 102, a pressure balance hole 16 is formed in the side wall of the first cylinder body in a penetrating mode, the piston shaft 13 is a two-section structure composed of a piston head 131 and a piston rod 132, as shown in fig. 7, the piston head 131 and the piston rod 132 are integrally formed, the diameter of the piston head 131 is matched with that of the first cylinder body 101, the diameter of the piston rod 132 is matched with that of the second cylinder body 102, a pressure transmission hole 17 is formed in the side wall of the piston rod 132 and in a position close to the piston head 131 in a penetrating mode, and a pressurization cavity 18 is defined between the piston rod 132 and the first cylinder body 101; a lower joint 19 is arranged at one end of the driving rod 14 far away from the piston shaft 13, and a sealing channel 20 communicated with the hollow channel 15 is formed inside the lower joint 19; the embodiment further comprises a steel ball 24, the diameter of the steel ball 24 is smaller than the inner diameter of the hollow channel 15, and the diameter of the steel ball 24 is larger than the inner diameter of the middle section of the sealing channel 20, so that when the steel ball 24 falls into the sealing channel 20 from the hollow channel 15, the steel ball 24 blocks the hollow channel 15, and the hollow channel 15 becomes a closed space.

A first sealing ring 21 is fixedly embedded outside the piston head 131, and the first sealing ring 21 is tightly attached to the inner wall of the first cylinder 101; a second sealing ring 22 is fixedly embedded in the inner wall of the upper joint 9, and the second sealing ring 22 is tightly attached to the outer wall of the upper central pipe 12; a third sealing ring 23 is fixedly embedded in the inner wall of the second cylinder 102, and the third sealing ring 23 is tightly attached to the outer wall of the piston rod 132.

When the device is used specifically, the left end of the mandrel 1 is connected with pipe columns such as a drill rod or an oil pipe, the right end of the mandrel 1 is fixedly connected with the upper joint 9, the lower joint 19 is connected with a fishing tool, then the product is put into the well by the drill rod, at the moment, the inside of the mandrel 1 and the hollow channel 15 are kept unblocked, and therefore the well can be washed by water circulation. After the fishing tool is in butt joint with the pipe column in the well, the worker puts the steel ball 24 into the hollow channel 15, under the action of gravity, the steel ball 24 falls into the lower joint 19 and blocks the sealing channel 20, and at the moment, a sealed space is formed inside the hollow channel 15. Then, water flow is poured into the mandrel 1 from top to bottom, and the lower joint 19 is blocked by the steel ball 24, so that the pushing piston 401 is pushed to move outwards along with the increasing pressure in the mandrel 1, the slip 3 is pushed outwards, and the outer surface of the slip 3 is abutted to the inner wall of the sleeve; simultaneously, because at the salvage in-process, dabber 1 can receive decurrent pulling force, so under the interact of guide block 301 and guide way, can make slips 3 and the more and more tight of sleeve pipe inner wall butt to fine anchoring effect has been realized. In addition, the water flow will pass through the pressure transfer hole 17 and into the pressurizing cavity 18, and as the pressure inside the pressurizing cavity 18 increases, the piston shaft 13 will also move upwards, thereby generating a force to lift the fish, and correspondingly, the fish will also generate a downward reaction force to the tool. When the piston shaft 13 gradually moves upwards until the pressure balance hole 16 is communicated with the inside of the pressurization cavity 18, the pressure in the pressurization cavity 18 disappears instantly, meanwhile, the acting force pushing against the piston 401 disappears, the pushing against piston 401 resets under the action of the return spring 403, the slips are recovered, the pipe column is lifted continuously, the piston shaft 13 resets, the inside of the hollow channel 15 recovers the seal, then the actions are repeated, and the fishing is carried out again until the fish falls and is unfrozen.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides an oil gas well is salvaged and is used hydraulic pressure booster which characterized in that: the device comprises an upper joint (9), a piston cylinder (10) and a driving sleeve (11) which are sequentially connected from left to right, wherein an upper central tube (12), a piston shaft (13) and a driving rod (14) are respectively arranged inside the upper joint (9), the piston cylinder (10) and the driving sleeve (11), the upper central tube (12), the piston shaft (13) and the driving rod (14) are sequentially connected end to end, and hollow channels (15) are jointly formed inside the upper central tube (12), the piston shaft (13) and the driving rod (14);

the piston cylinder (10) is of a two-section structure consisting of a first cylinder body (101) and a second cylinder body (102), the inner diameter of the first cylinder body (101) is larger than that of the second cylinder body (102), a pressure balance hole (16) penetrates through the side wall of the first cylinder body, the piston shaft (13) is of a two-section structure consisting of a piston head (131) and a piston rod (132), the diameter of the piston head (131) is matched with that of the first cylinder body (101), the diameter of the piston rod (132) is matched with that of the second cylinder body (102), a pressure transmission hole (17) penetrates through the side wall of the piston rod (132) and the position close to the piston head (131), and a pressurization cavity (18) is defined between the piston rod (132) and the first cylinder body (101);

and a lower joint (19) is arranged at one end of the driving rod (14) far away from the piston shaft (13), and a sealing channel (20) communicated with the hollow channel (15) is formed in the lower joint (19).

2. The hydraulic booster for oil and gas well fishing according to claim 1, characterized in that: the first sealing ring (21) is fixedly embedded outside the piston head (131), and the first sealing ring (21) is tightly attached to the inner wall of the first cylinder body (101).

3. The hydraulic booster for oil and gas well fishing according to claim 1, characterized in that: and a second sealing ring (22) is fixedly embedded in the inner wall of the upper joint (9), and the second sealing ring (22) is tightly attached to the outer wall of the upper central pipe (12).

4. The hydraulic booster for oil and gas well fishing according to claim 1, characterized in that: and a third sealing ring (23) is fixedly embedded in the inner wall of the second cylinder body (102), and the third sealing ring (23) is tightly attached to the outer wall of the piston rod (132).

5. The hydraulic booster for oil and gas well fishing according to claim 1, characterized in that: the sealing device is characterized by further comprising a steel ball (24), wherein the diameter of the steel ball (24) is smaller than the inner diameter of the hollow channel (15), and the diameter of the steel ball (24) is larger than the inner diameter of the middle section of the sealing channel (20).

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