Efficient force-increasing jam-releasing fisher

Abstract

The invention discloses an efficient force-increasing jam-releasing fisher which comprises a lifting rod, an orbital transfer box, a pressure transmitting pipe, a hanger, a transition connecting rod, a lifting cap, a piston connecting rod, a first-stage hydraulic cylinder, a second-stage hydraulic cylinder, a fishing connecting rod, an anchor and a fishing spear connector. One end of the outer side face of the lifting rod is in screwed connection with an inner hole of the track transfer box, the inner side face of the lifting rod is connected with the pressure transmitting pipe, and the pressure transmitting pipe is located in the track transfer box. A hanger is arranged on the outer side face of one end of the track transfer box, a transition connecting rod is connected into the track transfer box in a sliding mode, a lifting cap is arranged on the inner side face of the hanger, and the outer side face of the lifting cap is connected with a first-stage hydraulic cylinder through a screw thread. According to the efficient force-increasing jam-releasing fisher, the strength of the whole fisher can be improved, the accumulated eccentric tolerance after all the components are assembled is eliminated, meanwhile, the lifting capacity of ground equipment is improved, and the working performance of underground fishing is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of downhole fishing of oil and gas wells, in particular to a high-efficiency force-enhancing jam-releasing fishing device. Background Art

[0002] Existing downhole salvage devices have the following defects: (1) The various components of the salvage device are connected by welding, which reduces the strength of the metal components and causes various welding defects; (2) After the equipment is assembled, the piston, cylinder and piston connecting rod are eccentric, which affects the salvage accuracy; (3) The existing anchor is set at the upper end of the cylinder, and the ground equipment cannot help increase the lifting force, resulting in low ground controllability. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a high-efficiency force-enhancing jam-releasing salvage device, which can increase the strength of the overall salvage device, eliminate the accumulated eccentricity tolerance after the components are assembled, and at the same time improve the lifting capacity of the ground equipment, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an efficient force-enhancing jam-releasing salvage device, comprising a lifting rod, a track change box, a pressure transmission pipe, a hanger, a transition connecting rod, a lifting cap, a piston connecting rod, a primary hydraulic cylinder, a secondary hydraulic cylinder, a salvage connecting rod, an anchor and a spear joint;

[0005] One end of the outer side surface of the lifting rod is connected to the inner hole of the track change box with a thread, and the inner side surface of the lifting rod is connected to the pressure transmission pipe, and the pressure transmission pipe is located in the track change box;

[0006] A hanger is provided on the outer side of one end of the track change box, a transition connecting rod is slidably connected in the track change box, a lifting cap is provided on the inner side of the hanger, and the outer side of the lifting cap is connected to the primary hydraulic cylinder through a thread;

[0007] One end of the transition connecting rod is connected to the piston connecting rod through a thread, one end of the primary hydraulic cylinder is connected to the secondary hydraulic cylinder through a thread, the piston connecting rod passes through the interior of the primary hydraulic cylinder and the secondary hydraulic cylinder and is threadedly connected to the salvage connecting rod, a water trough is provided on the salvage connecting rod, the salvage connecting rod passes through the anchor, the anchor is connected to the secondary hydraulic cylinder through the anchor suspension and the third ball, and one end of the salvage connecting rod is connected to the spear joint.

[0008] As a preferred technical solution of the present invention, a first fixing pin is provided between the lifting rod and the track change box.

[0009] As a preferred technical solution of the present invention, a sealing seat is provided at one end of the pressure transmission tube, and a first ball is provided between the sealing seat and the lifting rod.

[0010] As a preferred technical solution of the present invention, a second fixing pin is provided between the end of the track change box and the transition connecting rod.

[0011] As a preferred technical solution of the present invention, the piston connecting rod is located in the primary cylinder, a sealing ring is provided between the piston connecting rod and the primary cylinder, and the sealing ring is fixed to the primary cylinder by a retaining ring and a fixing ring.

[0012] As a preferred technical solution of the present invention, the outer side surface of the piston connecting rod is connected to the piston through a ring, and the outer side surface of the piston fits with the inner side surface of the secondary cylinder.

[0013] As a preferred technical solution of the present invention, anchor claws are provided on the inner wall of the anchor.

[0014] As a preferred technical solution of the present invention, a pressure relief hole is provided on the spear catching joint.

[0015] As a preferred technical solution of the present invention, the inner side surface of the hanger is connected to the lifting cap via a second ball.

[0016] As a preferred technical solution of the present invention, the lifting rod, the pressure transmission pipe, the transition connecting rod and the piston connecting rod are internally connected, and one end of the piston connecting rod is connected to the water trough.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) the various components are connected by threads, and there is no phenomenon of reduced strength of metal materials caused by welding and various defects caused by welding, thereby enhancing the reliability of equipment use; (2) the first-level hydraulic cylinder, the second-level hydraulic cylinder, and the piston connecting rod are connected in series to achieve the purpose of reducing operating pressure and increasing lifting tonnage, and the piston is fixed on the piston connecting rod, which plays a regulating and compensating role for the eccentricity of the piston, hydraulic cylinder, and piston connecting rod caused by the cumulative tolerance after the equipment is assembled; (3) the salvage connecting rod is passed through the anchor structure, which changes the existing anchor suspension structure at the upper end of the hydraulic cylinder. During the salvage process, the ground equipment can fully assist in increasing the pulling force, thereby enhancing the controllable performance of ground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the salvage and jam release action of the present invention;

[0020] Figure 3 It is a schematic diagram of the process of track changing of the track changing box;

[0021] Figure 4 It is a connection diagram of the secondary cylinder and the piston connecting rod;

[0022] Figure 5 This is a schematic diagram of the connection between the anchor and the salvage rod.

[0023] In the figure: 1 lifting rod, 2 sealing seat, 3 first fixing pin, 4 first ball, 5 track change box, 6 pressure transmission pipe, 7 hanger, 8 second fixing pin, 9 second ball, 10 lifting cap, 11 first-level hydraulic cylinder, 12 transition connecting rod, 13 sealing ring, 14 retaining ring, 15 fixing ring, 16 second-level hydraulic cylinder, 17 piston connecting rod, 18 Yuanbao ring, 19 piston, 20 salvage connecting rod, 21 anchor suspension, 22 third ball, 23 anchor, 24 anchor claw, 25 salvage spear joint. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1 The present invention provides a technical solution: a high-efficiency force-enhancing jam-releasing salvage device, comprising a lifting rod 1, a track change box 5, a pressure transmission pipe 6, a hanger 7, a transition connecting rod 12, a lifting cap 10, a piston connecting rod 17, a primary hydraulic cylinder 11, a secondary hydraulic cylinder 16, a salvage connecting rod 20, an anchor 23 and a salvage spear joint 25;

[0026] One end of the outer side surface of the lifting rod 1 is connected to the inner hole of the track change box 5 with a thread, and a first fixing pin 3 is provided between the lifting rod 1 and the track change box 5 to prevent the lifting rod 1 and the track change box 5 from being threaded;

[0027] The inner side of the lifting rod 1 is connected to the pressure transmission tube 6, which is located in the track change box 5. A sealing seat 2 is provided at one end of the pressure transmission tube 6. A first ball 4 is provided between the sealing seat 2 and the lifting rod 1. The sealing seat 2 connects the lifting rod 1 and the pressure transmission tube 6 through the first ball 4, so as to transmit pressure.

[0028] A hanger 7 is provided on the outer side of one end of the track change box 5, and the track change box 5 completes the action of hooking and unhooking with the hanger 7 by changing the track;

[0029] A transition connecting rod 12 is slidably connected in the track change box 5, the inner side of the hanger 7 is connected to the lifting cap 10 through the second ball 9, and the outer side of the lifting cap 10 is connected to the primary hydraulic cylinder 11 through a thread. A second fixing pin 8 is provided between the end of the track change box 5 and the transition connecting rod 12 to prevent the track change box 5 and the transition connecting rod 12 from rotating relative to each other;

[0030] One end of the transition connecting rod 12 is connected to the piston connecting rod 17 through a threaded buckle. The piston connecting rod 17 is located in the primary liquid cylinder 11. A sealing ring 13 is provided between the piston connecting rod 17 and the primary liquid cylinder 11. The sealing ring 13 is fixed to the primary liquid cylinder 11 through a retaining ring 14 and a fixing ring 15.

[0031] One end of the primary cylinder 11 is connected to the secondary cylinder 16 through a thread, and the piston 19 is fixed to the piston connecting rod 17 through a ring 18. The piston connecting rod 17 passes through the interior of the primary cylinder 11 and the secondary cylinder 16 and is threadedly connected to the salvage connecting rod 20. The salvage connecting rod 20 is provided with a water trough. The salvage connecting rod 20 passes through the anchor 23, and the anchor 23 is connected to the secondary cylinder 16 through the anchor suspension 21 and the third ball 22. The salvage connecting rod 20 transmits pressure through the water trough, and the anchor claw 24 radially moves and anchors on the inner wall of the casing of the anchor 23 under pressure. One end of the salvage connecting rod 20 is connected to the spear fishing joint 25, and the spear fishing joint 25 is provided with a pressure relief hole. The lifting rod 1, the pressure transmission pipe 6, the transition connecting rod 12 and the interior of the piston connecting rod 17 are connected, and one end of the piston connecting rod 17 is connected to the water trough.

[0032] like Figure 2 The spear joint moves upward under the pressure of the piston rod 17 and the piston 19. At this time, the spear structure moves upward under the pressure of the secondary cylinder 16 and the piston 19. The spear joint 25 connects to the salvage spear to catch the fallen objects in the well and moves upward to complete the salvage and unblocking action.

[0033] like Figure 3 When one salvage is completed and the next salvage is to be carried out, the ground equipment lifting system lifts up and lowers the salvage string, and the salvage string drives the lifting rod 1 to drive the track change box 5 to change the track and hook the hanger.

[0034] The anchor is restored by lifting the first hydraulic cylinder 11 and the second hydraulic cylinder 16 by the lifting cap 10. Figure 1 The salvage status is shown. Continue to repeat the above actions to salvage.

[0035] like Figure 4 The first-stage liquid cylinder 11 and the second-stage liquid cylinder 16 in the present invention adopt a detachable sealing ring 13, and the retaining ring 14 and the fixing ring 15 support and fix the sealing ring 13. Because the first-stage liquid cylinder 11 and the second-stage liquid cylinder 16, the piston connecting rod 17 are multiple groups connected in series to achieve the purpose of reducing the operating pressure and increasing the lifting tonnage, and there are multiple groups of pistons 19 fixed on the piston connecting rod 17 with ingot rings 18. Therefore, this design structure plays a role in mediating and compensating for the eccentricity of the piston 19 and the first liquid cylinder 11, the second liquid cylinder 16 and the piston connecting rod 17 caused by the cumulative tolerance after the equipment is assembled. In addition, the present invention does not cause the phenomenon of reduced strength of metal materials and various defects caused by welding, thereby increasing the reliability of equipment performance.

[0036] like Figure 5 The present invention adopts a salvage connecting rod 20 passing through the anchor 23 structure, which changes the prior art anchor 23 hanging on the upper end of the cylinder. Therefore, the ground equipment of the present invention can fully assist in increasing the lifting tension during the salvage process, and this structure has controllable operational performance on the ground.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly efficient force-enhancing jam-releasing salvage device, characterized in that: It comprises a lifting rod (1), a track change box (5), a pressure transmission pipe (6), a hanger (7), a transition connecting rod (12), a lifting cap (10), a piston connecting rod (17), a primary hydraulic cylinder (11), a secondary hydraulic cylinder (16), a salvaging connecting rod (20), an anchor (23) and a salvaging spear joint (25); One end of the outer side surface of the lifting rod (1) is threadedly connected to the inner hole of the track change box (5), and the inner side surface of the lifting rod (1) is connected to the pressure transmission pipe (6), and the pressure transmission pipe (6) is located in the track change box (5); A hanger (7) is provided on the outer side surface of one end of the track change box (5), a transition connecting rod (12) is slidably connected inside the track change box (5), a lifting cap (10) is provided on the inner side surface of the hanger (7), and the outer side surface of the lifting cap (10) is connected to the primary hydraulic cylinder (11) through a threaded buckle; One end of the transition connecting rod (12) is connected to the piston connecting rod (17) via a thread, one end of the primary hydraulic cylinder (11) is connected to the secondary hydraulic cylinder (16) via a thread, the piston connecting rod (17) passes through the interior of the primary hydraulic cylinder (11) and the secondary hydraulic cylinder (16) and is threadedly connected to a salvage connecting rod (20), a water channel is provided on the salvage connecting rod (20), the salvage connecting rod (20) passes through the anchor (23), the anchor (23) is connected to the secondary hydraulic cylinder (16) via the anchor suspension (21) and the third ball (22), and one end of the salvage connecting rod (20) is connected to a spear joint (25).

2. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: A first fixing pin (3) is provided between the lifting rod (1) and the track change box (5).

3. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: A sealing seat (2) is provided at one end of the pressure transmission tube (6), and a first ball (4) is provided between the sealing seat (2) and the lifting rod (1).

4. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: A second fixing pin (8) is provided between the end of the track change box (5) and the transition connecting rod (12).

5. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: The piston connecting rod (17) is located in the primary liquid cylinder (11), and a sealing ring (13) is provided between the piston connecting rod (17) and the primary liquid cylinder (11). The sealing ring (13) is fixed to the primary liquid cylinder (11) via a retaining ring (14) and a fixing ring (15).

6. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: The outer side surface of the piston connecting rod (17) is connected to the piston (19) through a ring (18), and the outer side surface of the piston (19) is in contact with the inner side surface of the secondary liquid cylinder (16).

7. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: Anchor claws (24) are provided on the inner wall of the anchor (23).

8. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: The lance joint (25) is provided with a pressure relief hole.

9. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: The inner side surface of the hanger (7) is connected to the lifting cap (10) via a second ball (9).

10. The high-efficiency force-enhancing jam-releasing fishing device according to claim 1, characterized in that: The interiors of the lifting rod (1), the pressure transmission pipe (6), the transition connecting rod (12) and the piston connecting rod (17) are connected, and one end of the piston connecting rod (17) is connected to the water channel.

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