A fishing tool for fishing broken sucker rod in pumping well

Abstract

This utility model discloses a retrieval device for retrieving broken oil rods from pumping units, relating to the technical field of oil rod retrieval equipment for pumping units. Its key technical features include a retrieval sleeve and a suspension and pulling mechanism. The suspension and pulling mechanism is installed on the upper end of the retrieval sleeve by screws. The expansion magnetic attraction mechanism of this utility model has an expansion bladder that expands when inflated. When the expansion bladder expands, it moves the inner strong magnet inward, causing the strong magnet to contact the oil rod body. Thus, the absorbent material on the oil rod body is magnetically attracted and fixed by the strong magnet. A hollow connecting pipe supplies air to the expansion bladder and receives gas from a pneumatic connecting pipe, which in turn receives gas input from a pneumatic pipeline. Friction particles are adhered and fixed to the outer surface of the expansion bladder to increase friction. When the expansion bladder expands, the friction particles stably envelop the oil rod body for retrieval.

Description

Technical Field

[0001] This utility model relates to the technical field of oil rod retrieval equipment for oil pumping units, specifically a retrieval device for retrieving broken oil rods from oil pumping units. Background Technology

[0002] Retrieval tools are the most widely used, frequently used, and diverse specialized tools in oil and water well workover operations, primarily used for handling objects that have fallen into the well. They are categorized into five main types based on the type of object: pipes, rods, ropes, logging instruments, and small items; and six main types based on structure: cones, spears, tubes, hooks, baskets, and others. When retrieving oil rods from pumping units, a specific retrieval tool is required to handle broken oil rods.

[0003] The existing Chinese patent CN206681696U, disclosed on November 28, 2017, is an oilfield retrieval device, including an oilfield wellbore, an upper connector, a retrieval outer cylinder, a lower connector, a retrieval inner cylinder, a retrieval control rod, multiple retrieval claw rotation couplings, multiple retrieval claws, multiple retrieval claw movable holes, multiple first buffer springs, multiple limiting grooves, and multiple movable protrusions. The retrieval outer cylinder is connected to the upper and lower connectors and is located inside the oilfield wellbore. The retrieval inner cylinder is located inside the retrieval outer cylinder. The retrieval control rod is inserted into the retrieval inner cylinder. The limiting grooves are located on the retrieval control rod. The movable protrusions are located inside the retrieval inner cylinder and are embedded in the limiting grooves. The retrieval claws are connected to the retrieval inner cylinder via retrieval claw rotation couplings and pass through the retrieval claw movable holes. The retrieval claw movable holes are located on the retrieval outer cylinder. The first buffer springs are located inside the retrieval claw movable holes.

[0004] However, in actual use, the above-mentioned device is not very stable during the retrieval operation because the smooth outer side of the rod results in low friction.

[0005] Therefore, we propose a novel retrieval tool for retrieving broken oil rods from pumping wells to solve the aforementioned technical problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a retrieval device for retrieving broken oil rods from pumping wells. This solves the problem that, in actual use, the aforementioned devices, when using retrieval claws for retrieval operations, suffer from low friction due to the smoothness of the outer side of the rod, resulting in instability during retrieval.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a retrieval device for retrieving broken oil rods from pumping wells, comprising:

[0010] Salvage sleeve;

[0011] A suspension and pulling mechanism is installed on the upper end of the salvage sleeve by screws, and the suspension and pulling mechanism is connected to the rope traction device;

[0012] Two side telescopic abutment mechanisms are symmetrically fixed to the outer wall of the retrieval sleeve;

[0013] An expansion magnetic attraction mechanism is fixedly connected to the middle of the inside of the retrieval sleeve;

[0014] A smooth sleeve is fixedly connected to the inner side of the lower end of the retrieval sleeve;

[0015] The oil rod body of the pumping unit well is located below the smooth sleeve.

[0016] Preferably, the salvage sleeve includes a sleeve shell, the inside of which is provided with an upper drainage cavity, and the inner side of the upper drainage cavity is provided with a plurality of evenly distributed drainage holes around the top outer wall of the sleeve shell.

[0017] Preferably, the suspension and pulling mechanism includes a rope loop, a pulling end rod is fixedly connected to the lower middle of the rope loop, and a screw mounting plate is fixedly connected to the lower end of the pulling end rod. The screw mounting plate is mounted on the sleeve housing by screws.

[0018] Preferably, the side telescopic abutment mechanism includes a hollow lug plate, the inner end of which is fixed to the outer wall of the sleeve shell. Two waterproof electric telescopic cylinders are installed inside the hollow lug plate. The telescopic rod of the waterproof electric telescopic cylinder passes through the hollow lug plate and is sleeved with an installation sleeve. The waterproof electric telescopic cylinder and the installation sleeve are detachably connected by locking bolts. A movable panel is fixed to the outer end of the installation sleeve. An abutment rubber pad is glued to the outer end of the movable panel with epoxy resin adhesive.

[0019] Preferably, the expansion magnetic attraction mechanism includes an expansion airbag, which is bonded to the inner wall of the sleeve shell by epoxy resin adhesive. Ten strong magnets are symmetrically fixed to the inner side of the expansion airbag. A hollow connecting tube is connected to the outer end of the expansion airbag through the sleeve shell. A pneumatic connecting tube is connected to the upper end of the hollow connecting tube and is connected to a pneumatic pipeline.

[0020] Preferably, friction particles are adhered and fixed to the outer surface of the inflatable airbag.

[0021] Preferably, the smooth sleeve includes a conical shell, the conical shell having a smooth inner cavity inside, and the conical shell being fixed to the lower end of the sleeve outer shell.

[0022] (III) Beneficial Effects

[0023] Compared with the prior art, this utility model provides a retrieval tool for retrieving broken oil rods from pumping wells, which has the following beneficial effects:

[0024] 1. The expansion bladder of this utility model's expansion magnetic attraction mechanism expands when inflated. When the expansion bladder expands, it moves the strong magnet inside, causing it to contact the oil rod body of the pumping unit. In this way, the adsorbable material on the oil rod body is magnetically attracted and fixed by the strong magnet. The hollow connecting pipe can supply air to the expansion bladder and can receive gas from the pneumatic connecting pipe. The pneumatic connecting pipe can receive gas input from the pneumatic pipeline. Friction particles are adhered and fixed to the outer surface of the expansion bladder to increase friction. When the expansion bladder expands, the friction particles can stably wrap around the oil rod body of the pumping unit for retrieval.

[0025] 2. The two side telescopic contact mechanisms of this utility model are symmetrically welded and fixed on the outer wall of the retrieval sleeve, which can be stably installed and placed, and each can be controlled independently. In this way, the position of the sleeve shell can be changed according to the different telescopic contact distances of the two side telescopic contact mechanisms, and the position can be effectively adjusted as needed for stable insertion and retrieval. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic cross-sectional view of the combined structure of the salvage sleeve, expansion magnetic attraction mechanism and smooth sleeve of this utility model.

[0028] Figure 3 This is a cross-sectional structural diagram of the side telescopic abutment mechanism of this utility model;

[0029] Figure 4 This is a schematic diagram of the suspension and tension mechanism of this utility model;

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the smooth sleeve of this utility model.

[0031] In the picture:

[0032] 1. Rope lifting ring; 11. Screw mounting plate; 12. Pulling end rod; 2. Sleeve outer shell; 21. Upper drainage chamber; 22. Drainage hole; 3. Hollow ear plate; 31. Waterproof electric telescopic cylinder; 4. Contact rubber pad; 41. Locking bolt; 42. Movable panel; 43. Mounting sleeve; 5. Hollow connecting pipe; 51. Pneumatic connecting pipe; 52. Strong magnet; 53. Inflatable air bladder; 6. Conical shell; 61. Smooth inner cavity; 7. Oil rod body of pumping unit well. Detailed Implementation

[0033] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0034] Example 1

[0035] This embodiment provides a technical solution: a retrieval tool for retrieving broken oil rods from pumping unit wells, such as... Figures 1-5 As shown, it includes a retrieval sleeve, a suspension and pulling mechanism, two side telescopic contact mechanisms, an expansion magnetic attraction mechanism, a smooth sleeve, and the oil rod body 7 of the pumping unit well.

[0036] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the suspension and pulling mechanism is installed on the upper end of the salvage sleeve by screws and can be easily installed and removed with tools. The suspension and pulling mechanism is connected to the rope traction device, which can drive the suspension and pulling mechanism to rise and fall. The salvage sleeve includes a sleeve shell 2. The sleeve shell 2 has an upper drainage chamber 21 inside. The sleeve shell 2 can store liquid through the upper drainage chamber 21. The inner side of the upper drainage chamber 21 is provided with a plurality of evenly distributed drainage holes 22 around the top outer wall of the sleeve shell 2. When the liquid inside the upper drainage chamber 21 is squeezed, it can be effectively discharged through the plurality of drainage holes 22 of the sleeve shell 2.

[0037] The suspension and pulling mechanism includes a rope lifting ring 1, on which a rope can be tied for hoisting. A pulling end rod 12 is fixedly connected to the lower middle of the rope lifting ring 1. The rope lifting ring 1 can be pulled by the pulling end rod 12. A screw mounting plate 11 is fixedly connected to the lower end of the pulling end rod 12. The pulling end rod 12 can pull the screw mounting plate 11 for placement. The screw mounting plate 11 is installed on the sleeve housing 2 by screws. The screw mounting plate 11 can pull the sleeve housing 2 for suspension.

[0038] The smooth sleeve is welded and fixed to the inner side of the lower end of the retrieval sleeve, which can be stably installed and fixed. The oil rod body 7 of the pumping unit is located below the smooth sleeve and can be fitted accordingly. The smooth sleeve includes a conical shell 6, which is fixed to the lower end of the sleeve shell 2 and can be stably installed and fixed. The conical shell 6 has a smooth inner cavity 61 inside. The conical shell 6 can slide and fit onto the periphery of the oil rod body 7 of the pumping unit through the smooth inner cavity 61, which is more convenient when fitting.

[0039] Example 2

[0040] This embodiment is a further optimization based on Embodiment 1. The parts that are the same as those described above will not be repeated here. Figures 1-3 As shown, to further better realize this utility model, the following arrangement is specifically adopted: two side telescopic contact mechanisms are symmetrically welded and fixed to the outer wall of the retrieval sleeve, which can be stably installed and placed, and each can be controlled independently. In this way, according to the different telescopic distances of the two side telescopic contact mechanisms, the position of the sleeve shell 2 can be changed, which can effectively adjust the position as needed for stable insertion and retrieval. The side telescopic contact mechanism includes a hollow ear plate 3, the inner end of which is welded and fixed to the outer wall of the sleeve shell 2, which can be stably installed and placed. Two waterproof electric telescopic cylinders 31 are installed inside the hollow ear plate 3. The waterproof electric telescopic cylinders 31 are electrically connected to the control box through a connecting wire, and the waterproof electric telescopic cylinders can be controlled through the control box. The telescopic rod of the waterproof electric telescopic cylinder 31 passes through the hollow ear plate 3 and is fitted with an installation sleeve 43. The waterproof electric telescopic cylinder 31 and the installation sleeve 43 are detachably connected by a locking bolt 41. When the telescopic rod of the waterproof electric telescopic cylinder 31 extends, it can drive the installation sleeve 43, which is fixed by the locking bolt 41, to move outward. By tightening or loosening the locking bolt 41, the installation sleeve 43 can be easily installed and removed. The outer end of the installation sleeve 43 is fixed with a movable panel 42. When the installation sleeve 43 moves outward, it can drive the movable panel 42 to move outward. The outer end of the movable panel 42 is fixed with an abutment rubber pad 4 by epoxy resin adhesive. The movable panel 42 can drive the abutment rubber pad 4 to move outward, and the abutment rubber pad 4 can come into contact with the oil well wall.

[0041] Example 3

[0042] This embodiment is a further optimization based on Embodiment 1. The parts that are the same as those described above will not be repeated here. Figure 1 and Figure 2As shown, to further better realize this utility model, the following arrangement is specifically adopted: the expansion magnetic attraction mechanism is fixedly connected to the inside of the retrieval sleeve, which can be stably installed and placed. The expansion magnetic attraction mechanism includes an expansion airbag 53, which is fixedly attached to the inner wall of the sleeve shell 2 by epoxy resin adhesive, which can be stably installed and fixed. Ten strong magnets 52 are symmetrically fixed to the inner side of the expansion airbag 53. When the expansion airbag 53 is inflated, it can expand. When the expansion airbag 53 expands, it can drive the strong magnets 52 on the inner side to move inward, so that the strong magnets 52 can move inward. The strong magnet 52 contacts the oil rod body 7 of the pumping unit well, so that the adsorbable material of the oil rod body 7 of the pumping unit well well will be magnetically attracted and fixed by the strong magnet 52. The outer end of the expansion air bag 53 passes through the sleeve shell 2 and is fixedly connected to the hollow connecting pipe 5. The hollow connecting pipe 5 can supply air to the expansion air bag 53. The upper end of the hollow connecting pipe 5 is fixedly connected to the air pressure connecting pipe 51. The hollow connecting pipe 5 can receive the gas from the air pressure connecting pipe 51. The air pressure connecting pipe 51 is connected to the air pressure pipeline, and the air pressure connecting pipe 51 can receive the gas input from the air pressure pipeline.

[0043] Friction particles are adhered and fixed to the outer surface of the expansion airbag 53, which can increase the friction force. When the expansion airbag 53 expands, it can stably wrap around the oil rod body 7 of the pumping unit well for retrieval through the friction particles.

[0044] Working principle: During use, the suspension and pulling mechanism is installed on the upper end of the salvage sleeve by screws. It can be easily installed and removed with tools. The suspension and pulling mechanism is connected to the rope traction device, which can drive the suspension and pulling mechanism to lift and lower.

[0045] When adjusting the position, the retrieval sleeve can be adjusted by the side telescopic contact mechanism. When the telescopic rod of the waterproof electric telescopic cylinder 31 of the side telescopic contact mechanism extends, it can drive the installation sleeve 43, which is fixed by the locking bolt 41, to move outward. After the locking bolt 41 is tightened or loosened, the installation sleeve 43 can be easily installed and removed. When the installation sleeve 43 moves outward, it can drive the movable panel 42 to move outward. The movable panel 42 can then drive the contact rubber pad 4 to move outward, and the contact rubber pad 4 can then come into contact with the oil well wall. The two side telescopic contact mechanisms are symmetrically welded and fixed on the outer wall of the retrieval sleeve, which can be stably installed and placed. Each one can be controlled independently. In this way, according to the different telescopic distances of the two side telescopic contact mechanisms, the position of the sleeve shell 2 can be changed, and the position can be effectively adjusted as needed for stable retrieval.

[0046] The retrieval sleeve can be smoothly fitted into the oil rod body 7 of the pumping unit well through the smooth sleeve at the lower end. The retrieval sleeve can be inflated by an internal expansion magnetic attraction mechanism. When the expansion magnetic attraction mechanism's expansion air bladder 53 is inflated, it can drive the strong magnet 52 on the inner side to move inward, so that the strong magnet 52 contacts the oil rod body 7 of the pumping unit well. In this way, the adsorbable material of the oil rod body 7 of the pumping unit well well will be magnetically attracted and fixed by the strong magnet 52. The hollow connecting pipe 5 can supply air to the expansion air bladder 53. The hollow connecting pipe 5 can receive gas from the gas pressure connecting pipe 51. The gas pressure connecting pipe 51 can receive gas input from the gas pressure pipeline. Friction particles are adhered and fixed to the outer surface of the expansion air bladder 53, which can increase the friction force. When the expansion air bladder 53 expands, it can stably wrap around the oil rod body 7 of the pumping unit well for retrieval through the friction particles.

[0047] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A retrieval device for retrieving broken oil rods from oil pumping wells, characterized in that, include: Salvage sleeve; A suspension and pulling mechanism is installed on the upper end of the salvage sleeve by screws, and the suspension and pulling mechanism is connected to the rope traction device; Two side telescopic abutment mechanisms are symmetrically fixed to the outer wall of the retrieval sleeve; An expansion magnetic attraction mechanism is fixedly connected to the middle of the inside of the retrieval sleeve; A smooth sleeve is fixedly connected to the inner side of the lower end of the retrieval sleeve; The oil rod body (7) of the pumping unit well is located below the smooth sleeve.

2. The retrieval device for retrieving broken oil rods from pumping wells according to claim 1, characterized in that: The salvage sleeve includes a sleeve shell (2), and an upper drainage cavity (21) is provided inside the sleeve shell (2). The inner side of the upper drainage cavity (21) is provided with a plurality of drainage holes (22) evenly distributed around the top outer wall of the sleeve shell (2).

3. The retrieval device for retrieving broken oil rods from pumping wells according to claim 1, characterized in that: The suspension and pulling mechanism includes a rope ring (1), a pulling end rod (12) is fixedly connected to the middle of the lower end of the rope ring (1), and a screw mounting plate (11) is fixedly connected to the lower end of the pulling end rod (12). The screw mounting plate (11) is mounted on the sleeve shell (2) by screws.

4. A retrieval device for retrieving broken oil rods from pumping wells according to claim 1, characterized in that: The side telescopic contact mechanism includes a hollow ear plate (3), the inner end of which is fixed to the outer wall of the sleeve shell (2). Two waterproof electric telescopic cylinders (31) are installed inside the hollow ear plate (3). The telescopic rod of the waterproof electric telescopic cylinder (31) passes through the hollow ear plate (3) and is sleeved with an installation sleeve (43). The waterproof electric telescopic cylinder (31) and the installation sleeve (43) are detachably connected by a locking bolt (41). The outer end of the installation sleeve (43) is fixed with a movable panel (42). The outer end of the movable panel (42) is fixed with an abutment rubber pad (4) by epoxy resin adhesive.

5. A retrieval device for retrieving broken oil rods from pumping wells according to claim 1, characterized in that: The expansion magnetic attraction mechanism includes an expansion airbag (53), which is fixed to the inner wall of the sleeve shell (2) by epoxy resin adhesive. Ten strong magnets (52) are symmetrically fixed to the inner side of the expansion airbag (53). A hollow connecting tube (5) is fixed through the sleeve shell (2) at the outer end of the expansion airbag (53). A pneumatic connecting tube (51) is fixed through the upper end of the hollow connecting tube (5). The pneumatic connecting tube (51) is connected to a pneumatic pipeline.

6. A retrieval device for retrieving broken oil rods from pumping wells according to claim 5, characterized in that: Friction particles are adhered and fixed to the outer surface of the inflatable airbag (53).

7. A retrieval device for retrieving broken oil rods from pumping wells according to claim 1, characterized in that: The smooth sleeve includes a conical shell (6), the inside of which is provided with a smooth inner cavity (61), and the conical shell (6) is fixed to the lower end of the sleeve shell (2).

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