A large-diameter packer for oil production

Abstract

The invention relates to the technical field of packers, and specifically to a large-diameter packer for oil development, comprising a pipe column and a casing, wherein an assembly groove is provided on the casing, and bayonet holes are provided on both sides of the assembly groove, a slip is provided in the assembly groove, and face teeth are provided on the slip, telescopic fixed columns are provided on both sides of the slip, and an unlocking rod for controlling the telescopic extension of the fixed column is slidably installed in the slip, a partition is fixedly installed at the front end of the unlocking rod, an inner ring is provided in the casing, and the partition is movably installed in the liquid cavity of the inner ring, a through hole connected with the liquid cavity is provided on the inner wall of the inner ring, a lifting lower sealing ring is provided in the pipe column, and an upper sealing ring deformed as the lower sealing ring descends is provided in the pipe column, an anti-stuck ball is put into the pipe column through a hanging pipe, a liquid outlet is provided on the anti-stuck ball, a protective bent pipe is provided on the slip, and an auxiliary separation structure is provided on the slip for the face teeth, so as to achieve the purpose of easy unsealing and avoiding slip well jams.

Description

Technical Field

[0001] The invention relates to the technical field of packers, in particular to a large-diameter packer used in petroleum development. Background Art

[0002] Oil is an important energy resource in modern society. Its exploitation and utilization are of great significance to economic development and social progress. In the process of oil extraction, packers, as a key equipment, are widely used to control the flow of fluids in the well, prevent the mixing of fluids between oil and gas layers, and ensure the safety and effectiveness of extraction. As a new type of packer, the large-diameter packer is designed to increase the channel diameter of the fluid, thereby reducing the resistance to fluid flow and improving oil production efficiency. The large-diameter packer can effectively control the flow of fluids in different oil layers in the well without increasing the wellbore pressure, providing a more flexible flow control solution for oil and gas extraction. Especially under complex geological conditions, the large-diameter packer can prevent cross-flow between oil layers in the well, maintain the production stability of each oil layer, and maximize the recovery rate of oil and gas.

[0003] At present, heavy oil extraction requires the injection of 360-degree steam, 390-degree superheated steam, and flue steam into the formation to dilute the heavy oil under the formation through the effect of high temperature so that it can be extracted. The packer can seal the oil well casing and the insulation pipe ring to prevent the steam from rising up and stretching the oil well casing due to heat, which will damage the cementing state of the oil well casing downhole. However, the current large-diameter packers are usually positioned by the slip structure, and the slip support may be covered with scale during the long-term steam injection process. The slip does not work when unsealed, causing the well to get stuck, and even causing a major overhaul of the oil well. Summary of the invention

[0004] The object of the present invention is to provide a large-diameter packer for oil development, so as to achieve the purpose of easy unsealing and avoiding Kavaka wells, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-diameter packer for oil mining, comprising a pipe column and a casing, the casing is movably sleeved on the pipe column, and the track pin on the pipe column is connected to the track groove in the casing, the casing is provided with an assembly groove, and bayonet holes are provided on both sides of the assembly groove, a slip is provided in the assembly groove, and the slip is provided with face teeth, telescopic fixed columns are provided on both sides of the slip, and an unlocking rod for controlling the telescopic extension of the fixed column is slidably installed in the slip, a partition is fixedly installed at the front end of the unlocking rod, an inner ring is provided in the casing, and the partition is movably installed in the liquid cavity of the inner ring, and a locking mechanism is provided on the inner wall of the inner ring. There is a through hole connected to the liquid cavity, and a one-way plug is installed on the through hole, the pipe column is arranged through the inner ring, and the pipe column is provided with an outflow hole that can be connected with the through hole, and a lifting lower sealing ring is arranged in the pipe column, and an upper sealing ring that deforms as the lower sealing ring descends is arranged in the pipe column, the lower sealing ring and the upper sealing ring can seal the upper and lower sides of the anti-stuck ball, and the anti-stuck ball is placed in the pipe column through a hanging pipe, a liquid outlet is arranged on the anti-stuck ball, a protective bent pipe is arranged on the slip, and the rear end of the unlocking rod is located in the protective bent pipe, an auxiliary separation structure is arranged on the slip for the face teeth, and the auxiliary separation structure can be pried by the unlocking rod.

[0006] Preferably, a rubber sleeve is provided on the pipe column, and an upper end is provided on the rubber sleeve, the track pin is provided on the bottom outer wall of the pipe column, and the track groove is provided on the inner wall of the casing.

[0007] Preferably, the assembly groove is annularly arranged at the top end of the sleeve, and the bayonet is located on the groove wall of the assembly groove, a cavity is arranged at the bottom of the slip, a slider is slidably installed in the cavity, and the fixing column is connected to the slider.

[0008] Preferably, a spring guide rod is fixedly installed in the cavity of the cava, and the slider is connected to the spring guide rod, an inclined plate is fixedly connected to the slider, and an unlocking rod is arranged through the inner ring and the cava, a closing piece is fixedly connected to the unlocking rod, and the closing piece is movably connected to the inclined plate.

[0009] Preferably, the partition can separate the liquid cavity, and a through hole and a through hole are respectively provided on both sides of the liquid cavity, and the unlocking rod is connected in the through hole.

[0010] Preferably, the outflow hole is annularly arranged on the pipe column, and a spring strut is arranged inside the pipe column, the lower sealing ring is movably mounted on the spring strut, and the upper sealing ring is fixedly mounted above the lower sealing ring.

[0011] Preferably, a top seat is fixedly connected to the lower sealing ring, and a spring steel ball is provided on the top seat, the spring steel ball can be connected to the outflow hole, and a slot is provided on the pipe column, a pull rod is fixedly connected to the top seat, and a pressure piece is provided on the pull rod, the pull rod is arranged through the upper sealing ring, and the pressure piece is located above the upper sealing ring.

[0012] Preferably, the anti-stuck ball is lowered into the tubing string when a Kavaka well occurs, and the hanging pipe is externally connected to the liquid supply equipment, the liquid outlet is arranged in the middle of the anti-stuck ball, a push rod is arranged through the conical surface of the tubing string, and the tail end of the push rod is in the moving path of the anti-stuck ball.

[0013] Preferably, the protective bend is a downward-bending structure, and a movable plug is movably provided inside the protective bend, and the movable plug is connected to the unlocking rod.

[0014] Preferably, the auxiliary separation structure includes an axle seat arranged on the cava, and a pry bar is rotatably mounted on the axle seat, one end of the pry bar is fixedly connected to a push plate, and the push plate is in the gap of the face teeth, and a movable frame is fixedly connected to the movable plug, and when the movable frame moves, the pry bar can be pushed to rotate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The tubing and casing of the present invention adopt a conventional structure as a whole, while the slips adopt an assembled structure. Under normal circumstances, when recovering the tubing and casing, the tubing can be directly lifted up. When a well is stuck, the slips can be unloaded to prevent them from affecting the recovery of the large-diameter packer.

[0017] 2. The present invention performs unlocking and unloading of the slips through an unlocking rod. When a well is stuck, the unlocking rod can be pushed from the inside of the casing to keep the fixed column in a retracted state. At this time, the slips can be separated from the casing. When the pipe column and the casing are recovered, they are not easily hindered by the slips, even if the surface teeth of the slips are adhered to the pipeline well. The unlocking rod is pushed by hydraulic pressure and is installed on the inner ring of the casing. When liquid enters the inner ring, the pressure generated can push the partition, thereby moving the unlocking rod to unlock the slips. The unlocking rod adopts a structure that is easy to break and can be unloaded along with the slips without affecting the recovery work.

[0018] 3. The slip unloading structure of the present invention is preset in the pipe column and casing. It does not need to be used under normal circumstances. When a well is stuck, it is used with the help of an anti-stuck ball. The hanging pipe falls from the top of the pipeline well along with the anti-stuck ball and finally enters the pipe column. The falling process of the anti-stuck ball generates potential energy, which first hits the tail end of the push rod, causing the push rod to hit the slip from the inside, which can loosen the slip. At this time, you can try to see if you can complete the recovery. The anti-stuck ball finally falls between the lower sealing ring and the upper sealing ring, and liquid is injected into the anti-stuck ball through the hanging pipe. The liquid flows out from the liquid outlet and can enter the inner ring through the outflow hole and the through hole, thereby generating hydraulic pressure to drive the partition and the unlocking rod to move.

[0019] 4. When the unlocking rod of the present invention moves to unlock the slip, it can also push the movable plug, so that the movable plug in the protective elbow drives the movable frame to move downward, and the movable frame utilizes the pry bar to amplify the torque to drive the push plate to move. The push plate rotates out from the gap of the face teeth and can contact with the inner wall of the pipeline well, generating a certain force to assist the slip to separate or loosen from the pipeline well, making the packer easier to recover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 Schematic diagram of the pipe column structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the slip and casing structure.

[0023] Figure 4 It is a schematic diagram of the sleeve and inner ring structure of the present invention.

[0024] Figure 5 Schematic diagram of the sleeve structure of the present invention.

[0025] Figure 6 Schematic diagram of the inner ring structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the overall structure of the slip of the present invention.

[0027] Figure 8 It is a schematic diagram of a single slip structure of the present invention.

[0028] Fig. 9 This is a first schematic diagram of the unlocking structure of the present invention.

[0029] Fig.10 It is a schematic diagram of the internal structure of the inner ring of the present invention.

[0030] Fig.11 This is a second schematic diagram of the unlocking structure of the present invention.

[0031] Fig.12 It is a schematic diagram of the interior of the pipe column structure of the present invention.

[0032] In the figure: 1. pipe column; 2. casing; 3. rubber cylinder; 4. upper end; 5. track pin; 6. assembly groove; 7. bayonet; 8. slip; 9. face gear; 10. fixed column; 11. slider; 12. spring guide rod; 13. inclined plate; 14. unlocking rod; 15. closing piece; 16. partition; 17. inner ring; 18. through hole; 19. one-way plug; 20. outflow hole; 21. spring support rod; 22. lower sealing ring; 23. top seat; 24. spring steel ball; 25. pull rod; 26. pressure piece; 27. upper sealing ring; 28. slot; 29. ​​anti-stuck ball; 30. hanging pipe; 31. liquid outlet; 32. push rod; 33. protective elbow; 34. movable plug; 35. movable frame; 36. shaft seat; 37. pry bar; 38. push plate. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. It should be noted that 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 making creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 12 The present invention provides a technical solution: a large-diameter packer for oil mining, comprising a pipe column 1 and a casing 2, wherein the casing 2 is movably sleeved on the pipe column 1, and a track pin 5 on the pipe column 1 is connected to a track groove in the casing 2, an assembly groove 6 is provided on the casing 2, and bayonet 7 is provided on both sides of the assembly groove 6, a slip 8 is provided in the assembly groove 6, and a face tooth 9 is provided on the slip 8, telescopic fixed columns 10 are provided on both sides of the slip 8, and an unlocking rod 14 for controlling the telescopic movement of the fixed column 10 is slidably installed in the slip 8, a partition 16 is fixedly installed at the front end of the unlocking rod 14, and an inner ring 17 is provided in the casing 2, and the partition 16 is movably installed in the liquid cavity of the inner ring 17, and a through hole 1 communicating with the liquid cavity is provided on the inner wall of the inner ring 17 8, and a one-way plug 19 is installed on the through hole 18, the pipe column 1 is set through the inner ring 17, and the pipe column 1 is provided with an outflow hole 20 that can be connected with the through hole 18, and a lifting lower sealing ring 22 is provided in the pipe column 1, and an upper sealing ring 27 that deforms as the lower sealing ring 22 descends is provided in the pipe column 1, the lower sealing ring 22 and the upper sealing ring 27 can seal the upper and lower surfaces of the anti-stuck ball 29, and the anti-stuck ball 29 is placed in the pipe column 1 through a hanging pipe 30, and a liquid outlet 31 is provided on the anti-stuck ball 29, a protective bend 33 is provided on the slip 8, and the rear end of the unlocking rod 14 is located in the protective bend 33, and an auxiliary separation structure is provided on the slip 8 for the face tooth 9, and the auxiliary separation structure can be pried by the unlocking rod 14.

[0035] A rubber sleeve 3 is arranged on the pipe column 1 , and an upper end head 4 is arranged on the rubber sleeve 3 . A track pin 5 is arranged on the bottom outer wall of the pipe column 1 , and a track groove is arranged on the inner wall of the casing 2 .

[0036] The pipe string 1 and casing 2 of the present invention adopt a conventional structure as a whole. The two are connected by a track pin 5 and a track groove. The track groove is divided into a short groove and a long groove. The casing 2 can move with the pipe string 1, and the two also have a certain relative displacement ability. When going down the well, the casing 2 and the pipe string 1 enter the pipeline well at the same time. At this time, the track pin 5 is in the short groove. When sealing is required, the track pin 5 is transferred to the long groove, and the pipe string 1 and the casing 2 can further move relative to each other, so that the slips 8 on the casing 2 move to the conical surface position of the pipe string 1, are deformed and fixed in the pipeline well, and at this time, the pipe string 1 is fixed with the casing 2, and the rubber sleeve 3 is further deformed by the upper end 4, and is in close contact with the inside of the pipeline well, producing a sealing effect.

[0037] The assembly groove 6 is annularly arranged at the top of the sleeve 2, and the bayonet 7 is located on the groove wall of the assembly groove 6. A cavity is arranged at the bottom of the slip 8, and a slider 11 is slidably installed in the cavity, and the fixed column 10 is connected to the slider 11. A spring guide rod 12 is fixedly installed in the cavity of the slip 8, and the slider 11 is connected to the spring guide rod 12. An inclined plate 13 is fixedly connected to the slider 11, and an unlocking rod 14 is arranged through the inner ring 17 and the slip 8. A closing member 15 is fixedly connected to the unlocking rod 14, and the closing member 15 is movably connected to the inclined plate 13.

[0038] The slip 8 of the present invention adopts an assembled structure. Under normal circumstances, when the tubing string 1 and casing 2 are recovered, the tubing string 1 can be directly lifted up. When a well jam occurs, the slip 8 can be unloaded to prevent it from affecting the recovery of the large-diameter packer. When the unlocking rod 14 moves, the restraining member 15 thereon can move accordingly, generating pressure on the inclined plate 13, thereby driving the slider 11 and the fixed column 10 to move and retract, making it easy to install the bottom of the slip 8 in the assembly groove 6 of the casing 2. Correspondingly, when a well jam occurs, the unlocking rod 14 can be pushed from the inside of the casing 2, so that the fixed column 10 remains in a retracted state. At this time, the slip 8 can be separated from the casing 2, and when the tubing string 1 and casing 2 are recovered, it is not easily hindered by the slip 8, even if the surface teeth 9 of the slip 8 are adhered to the pipeline well.

[0039] The partition 16 can separate the liquid cavity, and a through hole 18 and a through hole are respectively provided on both sides of the liquid cavity, and the unlocking rod 14 is connected in the through hole.

[0040] The unlocking rod 14 is pushed by hydraulic pressure and is installed on the inner ring 17 on the casing 2. When liquid enters the inner ring 17, the pressure generated can push the partition 16, thereby moving the unlocking rod 14 to unlock the slip 8. The unlocking rod 14 adopts an easy-to-break structure. When the well is stuck, the unlocking rod 14 can be broken when the tubing string 1, casing 2 and inner ring 17 are lifted up for recovery. As the slip 8 is unloaded, the recovery work is not affected.

[0041] The outflow hole 20 is annularly arranged on the pipe column 1, and a spring strut 21 is arranged inside the pipe column 1, a lower sealing ring 22 is movably mounted on the spring strut 21, and an upper sealing ring 27 is fixedly mounted above the lower sealing ring 22. A top seat 23 is fixedly connected to the lower sealing ring 22, and a spring steel ball 24 is arranged on the top seat 23, and the spring steel ball 24 can be connected to the outflow hole 20, and a slot 28 is arranged on the pipe column 1, a pull rod 25 is fixedly connected to the top seat 23, and a pressing piece 26 is arranged on the pull rod 25, and the pull rod 25 is arranged through the upper sealing ring 27, and the pressing piece 26 is located above the upper sealing ring 27. The anti-stuck ball 29 is lowered into the tubing string 1 when a slip 8 is stuck in the well, and the hanging pipe 30 is externally connected to the liquid supply equipment. The liquid outlet 31 is arranged in the middle of the anti-stuck ball 29. A push rod 32 is arranged through the conical surface of the tubing string 1, and the tail end of the push rod 32 is in the moving path of the anti-stuck ball 29.

[0042] The unloading structure of the slip 8 of the present invention is preset in the pipe string 1 and the casing 2. It does not need to be used under normal circumstances. Recovering the packer only requires lifting the pipe string 1. However, if a well is stuck, the anti-stuck ball 29 is needed. The hanging pipe 30 falls from the top of the pipeline well with the anti-stuck ball 29 and finally enters the pipe string 1. The anti-stuck ball 29 generates potential energy during the falling process, first hitting the tail end of the push rod 32, so that the push rod 32 hits the slip 8 from the inside, which can loosen the slip 8. At this time, you can try to see if the recovery can be completed. The anti-stuck ball 29 finally falls on the lower sealing ring 22, so that the lower sealing ring 22 is on the spring support rod. 21 moves up and down, and seals the bottom of the anti-stuck ball 29, and the top seat 23 moves down with the lower sealing ring 22, and the pull rod 25 pulls the pressure piece 26 down, generating pressure on the upper sealing ring 27, so that the upper sealing ring 27 is deformed and contacts with the anti-stuck ball 29 to seal the upper part of the anti-stuck ball 29, and then liquid can be injected into the anti-stuck ball 29 through the hanging pipe 30, and the liquid flows out from the liquid outlet 31 and can enter the inner ring 17 through the outflow hole 20 and the through hole 18, thereby generating hydraulic pressure to drive the partition 16 and the unlocking rod 14 to move, so that the slip 8 is unlocked and separated from the casing 2, which is convenient for the recovery of the pipe string 1 and the casing 2.

[0043] The protective bend 33 is a downward bending structure, and a movable plug 34 is movably arranged in the protective bend 33, and the movable plug 34 is connected to the unlocking rod 14. The auxiliary separation structure includes an axle seat 36 arranged on the slip 8, and a pry bar 37 is rotatably mounted on the axle seat 36, and a push plate 38 is fixedly connected to one end of the pry bar 37, and the push plate 38 is in the gap of the face gear 9, and a moving frame 35 is fixedly connected to the movable plug 34, and when the moving frame 35 moves, the pry bar 37 can be pushed to rotate.

[0044] When the unlocking rod 14 moves to unlock the slip 8, it can also push the movable plug 34, so that the movable plug 34 in the protective bend 33 drives the movable frame 35 to move downward, and the movable frame 35 acts on the pry bar 37, and the pry bar 37 is used to amplify the torque to drive the push plate 38 to move. The push plate 38 is rotated out from the gap of the face teeth 9 and can contact the inner wall of the pipeline well, generating a certain force, thereby assisting the slip 8 to separate or loosen from the pipeline well, making the packer easier to recover.

[0045] When the present invention is in use: first, the pipe string 1 and the casing 2 of the present invention adopt a conventional structure as a whole, and the two are connected by a track pin 5 and a track groove. The track groove is divided into a short groove and a long groove. The casing 2 can move with the pipe string 1, and the two also have a certain relative displacement ability. When going down the well, the casing 2 and the pipe string 1 enter the pipeline well at the same time. At this time, the track pin 5 is in the short groove. When it is necessary to seal, the track pin 5 is transferred to the long groove, and the pipe string 1 and the casing 2 can further move relative to each other, so that the slip 8 on the casing 2 moves to the conical surface position of the pipe string 1, is deformed and fixed in the pipeline well, at this time, the pipe string 1 is fixed with the casing 2, and the rubber sleeve 3 is further deformed by the upper end 4, and is in close contact with the inside of the pipeline well, producing a sealing effect. The slip 8 adopts an assembled structure. Under normal circumstances, when the pipe string 1 and the casing 2 are recovered, the pipe string 1 can be directly lifted up. When a well jam occurs, the slip 8 can be unloaded to prevent it from affecting the recovery of the large-diameter packer. When the unlocking rod 14 moves, the binding member 15 thereon can move accordingly, generating pressure on the inclined plate 13, thereby driving the slider 11 and the fixed column 10 to move and retract, making it easy to install the bottom of the slip 8 in the assembly groove 6 of the casing 2. Correspondingly, when a well jam occurs, the unlocking rod 14 can be pushed from the inside of the casing 2, so that the fixed column 10 remains in the retracted state. At this time, the slip 8 can be separated from the casing 2, and when the pipe string 1 and the casing 2 are recovered, it is not easily hindered by the slip 8, even if the surface teeth 9 of the slip 8 In case of adhesion with the pipeline well, the unlocking rod 14 is pushed by hydraulic pressure, and it is installed on the inner ring 17 on the casing 2. When liquid enters the inner ring 17, the pressure generated can push the partition 16, thereby moving the unlocking rod 14 to unlock the slip 8. The unlocking rod 14 adopts a structure that is easy to break. When the well is stuck, the pipe column 1, the casing 2, and the inner ring 17 are lifted up for recovery, and the unlocking rod 14 can be broken. As the slip 8 is unloaded, the recovery work is not affected. The slip 8 unloading structure of the present invention is preset in the pipe column 1 and the casing 2, and does not need to be used under normal circumstances. To recover the packer, it is only necessary to lift the pipe column 1. However, in case of a well stuck, it is necessary to use the anti-stuck ball 29, and the hanging pipe 30 is lifted up with the anti-stuck ball 29 falls from the top of the pipeline well and finally enters the pipe string 1. The anti-stuck ball 29 generates potential energy during its falling process. It first hits the tail end of the push rod 32, so that the push rod 32 hits the slip 8 from the inside, which can loosen the slip 8. At this time, you can try to see if the recovery can be completed. The anti-stuck ball 29 finally falls on the lower sealing ring 22, so that the lower sealing ring 22 moves up and down on the spring support rod 21, and the bottom of the anti-stuck ball 29 is sealed. The top seat 23 moves down with the lower sealing ring 22, and the pull rod 25 pulls the pressing piece 26 down, generating pressure on the upper sealing ring 27, so that the upper sealing ring 27 is deformed and contacts the anti-stuck ball 29 to seal the upper part of the anti-stuck ball 29. Then, liquid can be injected into the anti-stuck ball 29 through the hanging pipe 30, and the liquid flows out from the liquid outlet 31.And it can enter the inner ring 17 through the outflow hole 20 and the through hole 18, thereby generating hydraulic pressure to drive the partition 16 and the unlocking rod 14 to move, so that the slip 8 is unlocked and separated from the casing 2, which is convenient for the recovery of the pipe string 1 and the casing 2. When the unlocking rod 14 moves to unlock the slip 8, it can also push the movable plug 34, so that the movable plug 34 in the protective elbow 33 drives the moving frame 35 to move downward. The moving frame 35 acts on the pry bar 37, and the pry bar 37 is used to amplify the torque to drive the push plate 38 to move. The push plate 38 is rotated out of the gap of the face tooth 9 and can contact the inner wall of the pipeline well, generating a certain force to assist the slip 8 to separate or loosen from the pipeline well, making it easier to recover the packer.

[0046] 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 large-diameter packer for oil production, comprising a pipe string (1) and a casing (2), characterized in that: The sleeve (2) is movably sleeved on the pipe column (1), and the track pin (5) on the pipe column (1) is connected to the track groove in the sleeve (2); the sleeve (2) is provided with an assembly groove (6), and bayonet holes (7) are provided on both sides of the assembly groove (6); a slip (8) is installed in the assembly groove (6), and the slip (8) is provided with a face tooth (9); telescopic fixed columns (10) are provided on both sides of the slip (8), and an unlocking rod (14) for controlling the telescopic movement of the fixed column (10) is slidably installed in the slip (8); a partition (16) is fixedly installed at the front end of the unlocking rod (14); an inner ring (17) is provided in the sleeve (2), and the partition (16) is movably installed in the liquid cavity of the inner ring (17); a through hole (18) communicating with the liquid cavity is provided on the inner wall of the inner ring (17), and a one-way plug (19) is installed on the through hole (18) ), the pipe column (1) is arranged to penetrate the inner ring (17), and the pipe column (1) is provided with an outflow hole (20) capable of docking with the through hole (18), and a lifting lower sealing ring (22) is provided in the pipe column (1), and an upper sealing ring (27) that deforms as the lower sealing ring (22) descends is provided in the pipe column (1), the lower sealing ring (22) and the upper sealing ring (27) are capable of sealing the upper and lower surfaces of the anti-stuck ball (29), and the anti-stuck ball (29) is lowered into the pipe column (1) through a hanging pipe (30), the anti-stuck ball (29) is provided with a liquid outlet (31), the slip (8) is provided with a protective bent pipe (33), and the rear end of the unlocking rod (14) is located in the protective bent pipe (33), and the slip (8) is provided with an auxiliary separation structure for the face tooth (9), and the auxiliary separation structure can be pried by the unlocking rod (14); The protective curved pipe (33) is a downward curved structure, and a movable plug (34) is movably arranged in the protective curved pipe (33), and the movable plug (34) is connected to the unlocking rod (14). The auxiliary separation structure includes an axle seat (36) arranged on the slip (8), and a pry bar (37) is rotatably mounted on the axle seat (36), one end of the pry bar (37) is fixedly connected to a push plate (38), and the push plate (38) is located in the gap of the face teeth (9). The movable plug (34) is fixedly connected to a movable frame (35), and when the movable frame (35) moves, it can push the pry bar (37) to rotate.

2. A large-diameter packer for oil production according to claim 1, characterized in that: The pipe column (1) is provided with a rubber sleeve (3), and the rubber sleeve (3) is provided with an upper end head (4), the track pin (5) is provided on the bottom outer wall of the pipe column (1), and the track groove is provided on the inner wall of the casing (2).

3. A large-diameter packer for oil production according to claim 1, characterized in that: The assembly groove (6) is annularly arranged at the top end of the sleeve (2), and the bayonet (7) is located on the groove wall of the assembly groove (6). A cavity is arranged at the bottom of the slip (8), and a slider (11) is slidably installed in the cavity, and the fixing column (10) is connected to the slider (11).

4. A large-diameter packer for oil production according to claim 2, characterized in that: A spring guide rod (12) is fixedly installed in the cavity of the slipper (8), and the slider (11) is connected to the spring guide rod (12). The slider (11) is fixedly connected to an inclined plate (13), and an unlocking rod (14) is arranged to penetrate the inner ring (17) and the slipper (8). A closing member (15) is fixedly connected to the unlocking rod (14), and the closing member (15) is movably connected to the inclined plate (13).

5. A large-diameter packer for oil production according to claim 1, characterized in that: The partition (16) is capable of dividing the liquid cavity, and a through hole (18) and a through hole are respectively provided on both sides of the liquid cavity, and the unlocking rod (14) is connected to the through hole.

6. A large-diameter packer for oil production according to claim 1, characterized in that: The outflow hole (20) is annularly arranged on the pipe column (1), and a spring support rod (21) is arranged inside the pipe column (1). The lower sealing ring (22) is movably mounted on the spring support rod (21), and the upper sealing ring (27) is fixedly mounted above the lower sealing ring (22).

7. A large-diameter packer for oil production according to claim 1, characterized in that: The lower sealing ring (22) is fixedly connected to a top seat (23), and a spring steel ball (24) is arranged on the top seat (23). The spring steel ball (24) can be connected to the outflow hole (20), and a slot (28) is arranged on the pipe column (1). The top seat (23) is fixedly connected to a pull rod (25), and a pressure piece (26) is arranged on the pull rod (25). The pull rod (25) passes through the upper sealing ring (27), and the pressure piece (26) is located above the upper sealing ring (27).

8. A large-diameter packer for oil production according to claim 1, characterized in that: The anti-stuck ball (29) is lowered into the pipe column (1) when a slip (8) is stuck in the well, and the hanging pipe (30) is externally connected to a liquid supply device. The liquid outlet (31) is arranged in the middle of the anti-stuck ball (29). A push rod (32) is arranged through the conical surface of the pipe column (1), and the tail end of the push rod (32) is located on the moving path of the anti-stuck ball (29).

Images