Downhole fallen object fishing device for oil exploitation

Abstract

The utility model discloses an underground fallen object salvaging device for oil exploitation, which relates to the technical field of oil exploitation, and comprises a main body frame and a bottom frame, the outer side of the main body frame is fixedly connected with four supporting outer arms, the interiors of the four supporting outer arms are respectively connected with a supporting inner arm in a sliding manner, and the top ends of the four supporting outer arms are respectively connected with an adjusting knob in a threaded manner; the fishing device has the advantages that due to the arrangement of the outer supporting arms and the inner supporting arms, when falling objects in an oil well are fished, the outer supporting arms and the inner supporting arms are adjusted to be in the length corresponding to the diameter of the oil well, then the limiting wheels make contact with the inner wall of the oil well, and the fishing device is convenient to use and high in practicability. And through the setting of the process, the device is more stable when the falling objects in the oil well are fished, and the situation that the device collides with the inner wall of the oil well in the fishing process, and consequently the device is damaged is prevented through the moving degree.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology, specifically to a device for retrieving fallen objects from oil wells. Background Technology

[0002] As global oil and gas field development expands into deep and complex wells, traditional fishing techniques face challenges. The environments of deep and complex wells place significantly higher demands on the strength, pressure resistance, and precise positioning of fishing tools, which traditional manual or simple mechanical fishing tools can no longer meet.

[0003] Traditional retrieval tools rely on collision or mechanical clamping, which can easily shake when falling into the oil well. This may cause the retrieval claw to collide with the inner wall of the oil well, affecting not only the stability of the retrieval but also the lifespan of the device to some extent. Therefore, we propose a downhole object retrieval device for oil development. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a downhole object retrieval device for oil well operations, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A downhole object retrieval device for oil wells, comprising a main frame and a base frame. Four supporting outer arms are fixedly connected to the outer side of the main frame. Each of the four supporting outer arms has a slidably connected inner supporting arm inside. Each of the four supporting outer arms has an adjusting knob threaded to its top. Each of the four supporting inner arms has a mounting frame fixedly installed at one end. Each of the four mounting frames has a limit wheel rotatably connected inside. A motor is fixedly installed at the top inside the main frame. A connecting plate is fixedly installed at the bottom of the main frame. An outer cylinder is fixedly installed at the bottom of the connecting plate. A screw is rotatably connected to the bottom inside the outer cylinder via a bearing. The other end of the screw passes through the connecting plate and the bottom of the main frame and is fixedly connected to the motor output end. The device is rotatably connected to the bottom of the connecting plate and the main frame. Five claw arms are rotatably connected to the bottom of the connecting plate. Each of the five claw arms has a claw plate fixedly installed at its bottom end. Each of the five claw arms has a sliding groove inside. A movable disc is threadedly connected to the outside of the screw. Five slots are opened on the outside of the outer cylinder. Five support arms are fixedly installed on the outside of the movable disc. Each of the five support arms has a sliding column fixedly installed at one end. The five sliding columns are slidably connected to the five sliding grooves respectively. When it is necessary to retrieve objects that have fallen into the well, the setting of the supporting outer arm and supporting inner arm can make the limiting wheel contact the inner wall of the oil well. Through this setting, when retrieving objects that have fallen into the well, the device can be prevented from shaking, which would affect the stability of the retrieval, and the device can be prevented from colliding with the inner wall of the oil well.

[0006] Preferably, an L-shaped plate is fixedly installed at the top of the base frame, and a winch is fixedly installed at the top of the L-shaped plate. A hoisting rope is fixedly connected to the output end of the winch. One end of the hoisting rope passes through the L-shaped plate and is fixedly installed with a second hoisting ring. By setting up the winch, the claw plate can be moved to a certain position, and then the fallen object in the oil well can be retrieved.

[0007] Preferably, a first lifting ring is fixedly installed at the top of the main frame, and the first lifting ring is fixedly connected to a second lifting ring.

[0008] Preferably, a control panel is fixedly installed on one side of the L-shaped plate, and a push rod is fixedly installed on one side of the L-shaped plate.

[0009] Preferably, four universal self-locking wheels are fixedly installed at the bottom end of the base frame, and four hydraulic cylinders are fixedly installed at the bottom end of the base frame. Each of the four hydraulic cylinders has a support plate fixedly installed at its bottom end. During retrieval, in order to ensure the stability of the device, the hydraulic cylinders and support plates can support the device. This process makes the device more stable during retrieval.

[0010] Preferably, the motor, winch, and hydraulic cylinder are all electrically connected to the control panel.

[0011] Preferably, the hydraulic cylinder consists of a piston, a piston rod, a buffer device, and a sealing device.

[0012] This utility model provides a downhole object retrieval device for oil well operations, which has the following advantages:

[0013] 1. This oil well drilling device uses a downhole object retrieval system. By setting up an outer support arm and an inner support arm, when retrieving objects from the oil well, the outer and inner support arms are first adjusted to a length corresponding to the diameter of the oil well. Then, the limiting wheel is brought into contact with the inner wall of the oil well. This process makes the device more stable when retrieving objects from the oil well and prevents the device from colliding with the inner wall of the oil well during the retrieval process, thus preventing damage to the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the main frame of this utility model;

[0016] Figure 3 This is a schematic diagram of the interior of the main frame of this utility model;

[0017] Figure 4 This is a schematic diagram of the interior of the outer cylinder of this utility model;

[0018] Figure 5This utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 6 This utility model Figure 4 Enlarged view of section B in the middle.

[0020] In the diagram: 1. Main frame; 101. Connecting plate; 2. Support outer arm; 3. Support inner arm; 4. Adjusting knob; 5. Mounting frame; 6. Limiting wheel; 7. Motor; 8. Outer cylinder; 801. Slot; 9. Moving plate; 10. Support arm; 1001. Sliding column; 11. Screw; 12. Claw arm; 121. Slide groove; 13. Claw plate; 14. First lifting ring; 15. Second lifting ring; 16. Lifting rope; 17. Winch; 18. L-shaped plate; 19. Control panel; 20. Push rod; 21. Base frame; 22. Hydraulic cylinder; 23. Support plate; 24. Universal self-locking wheel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figures 1 to 6This utility model provides a technical solution: a downhole object retrieval device for oil wells, comprising a main frame 1 and a base frame 21. Four supporting outer arms 2 are fixedly connected to the outside of the main frame 1. Each of the four supporting outer arms 2 has a supporting inner arm 3 slidably connected inside. Each of the four supporting outer arms 2 has a threaded adjustment knob 4 at its top, used to limit the length of the supporting inner arm 3 and the supporting outer arm 2. Each of the four supporting inner arms 3 has a mounting frame 5 fixedly installed at one end. Each of the four mounting frames 5 has a rotatable limit wheel 6 rotatably connected inside, used to contact the inner wall of the oil well. A motor 7 is fixedly installed at the top inside the main frame 1, used to drive a screw 11 to rotate. A dust cover can be fitted onto the screw 11 according to the site conditions. A connecting plate 101 is fixedly installed at the bottom of the main frame 1. An outer cylinder 8 is fixedly installed at the bottom of the connecting plate 101. The bottom inside the outer cylinder 8 is rotatably connected to a bearing. The screw 11 is used to move the moving disk 9. The other end of the screw 11 passes through the connecting plate 101 and the bottom end of the main frame 1 and is fixedly connected to the output end of the motor 7. The screw 11 is rotatably connected to the connecting plate 101 and the bottom end of the main frame 1. Five claw arms 12 are rotatably connected to the bottom end of the connecting plate 101. The claw arms 12 are used to drive the claw plates 13 to move. The claw plates 13 are fixedly installed at the bottom end of each of the five claw arms 12. The claw plates 13 are used to grab falling objects. Each of the five claw arms 12 has a sliding groove 121 inside. The moving disk 9 is threaded to the outside of the screw 11. The moving disk 9 is used to move the support arm 10. The support arm 10 is used to move the claw arm 12. Five slots 801 are opened on the outside of the outer cylinder 8. Five support arms 10 are fixedly installed on the outside of the moving disk 9. Each of the five support arms 10 has a sliding column 1001 fixedly installed at one end. The five sliding columns 1001 are slidably connected to the five sliding grooves 121 respectively.

[0023] like Figure 1 As shown, an L-shaped plate 18 is fixedly installed at the top of the base frame 21, and a winch 17 is fixedly installed at the top of the L-shaped plate 18. The winch 17 is used to retract the hoisting rope 16. The output end of the winch 17 is fixedly connected to the hoisting rope 16. The hoisting rope 16 is used to move the claw plate 13 to a certain position. One end of the hoisting rope 16 passes through the L-shaped plate 18 and is fixedly installed with a second lifting ring 15.

[0024] like Figure 1 As shown, a first lifting ring 14 is fixedly installed at the top of the main frame 1, and the first lifting ring 14 is fixedly connected to the second lifting ring 15.

[0025] like Figure 1 As shown, a control panel 19 is fixedly installed on one side of the L-shaped plate 18. The control panel 19 is used to control this device. A push rod 20 is fixedly installed on one side of the L-shaped plate 18. The push rod 20 is used to push this device.

[0026] like Figure 1As shown, four universal self-locking wheels 24 are fixedly installed at the bottom of the base frame 21. The universal self-locking wheels 24 are used to facilitate the movement of this device. Four hydraulic cylinders 22 are fixedly installed at the bottom of the base frame 21. The hydraulic cylinders 22 are used to push the support plate 23. The support plate 23 is fixedly installed at the bottom of each of the four hydraulic cylinders 22. The support plate 23 is used to support the device.

[0027] like Figure 1 As shown, the motor 7, winch 17, and hydraulic cylinder 22 are all electrically connected to the control panel 19.

[0028] like Figure 1 As shown, the hydraulic cylinder consists of a piston, a piston rod, a buffer device, a sealing device, and a drive assembly.

[0029] In summary, this oil well bottom-hole object retrieval device is used in the following steps: First, the operator holds the push rod 20 and moves the device above the oil well, ensuring the claw plate 13 is directly above the well. To prevent movement during retrieval, the control panel 19 is used to activate the four hydraulic cylinders 22, bringing the four support plates 23 into contact with the ground for stability. The operator then adjusts the lengths of the outer support arm 2 and inner support arm 3 using the adjustment knob 4, based on the well's diameter. The operator then uses the control panel 19 to activate the winch 17, releasing the hoisting rope 16 downwards, allowing the main frame 1 to move downwards. When the device enters the well, the four limit wheels 6 contact the well's inner wall, preventing movement and protecting the device. Once the claw plate 13 is inside the well, the control panel 19 activates the motor 7, which drives the device... The screw 11 rotates, causing the moving disc 9 to move upwards. This causes the five claw arms 12 to expand, which in turn causes the five claw plates 13 to expand. Then, the winch 17 continues to lower the hoisting rope 16, and the claw plates 13 are lowered further. When a certain depth is reached, the control panel 19 controls the motor 7 to rotate in the opposite direction, causing the moving disc 9 to move downwards. This causes the five claw plates 13 to retract, thus grabbing and retrieving objects that have fallen into the well. Note that this device can only retrieve larger objects. The winch 17 then retracts the hoisting rope 16, and the claw plates 13 are pulled up. After being pulled up, the hydraulic cylinder 22 retracts the support plate 23. Then, the operator pushes the push rod 20 to move the device to the designated position. The motor 7 then drives the screw 11 to rotate, causing the moving disc 9 to move, which allows the five claw plates 13 to separate, and the retrieved object is released. The above is the working principle of this utility model.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for retrieving fallen objects from oil wells, comprising a main frame (1) and a base frame (21), characterized in that: Four supporting outer arms (2) are fixedly connected to the outside of the main frame (1). Supporting inner arms (3) are slidably connected inside each of the four supporting outer arms (2). Adjusting knobs (4) are threaded to the top of each of the four supporting outer arms (2). Mounting frames (5) are fixedly installed at one end of each of the four supporting inner arms (3). Limiting wheels (6) are rotatably connected inside each of the four mounting frames (5). A motor (7) is fixedly installed at the top inside the main frame (1). A connecting plate (101) is fixedly installed at the bottom of the main frame (1). An outer cylinder (8) is fixedly installed at the bottom of the connecting plate (101). A screw (11) is rotatably connected to the bottom inside the outer cylinder (8) through a bearing. The other end of the screw (11) passes through the connecting plate (101) and the main frame. The bottom end of the frame (1) is fixedly connected to the output end of the motor (7), and the screw (11) is rotatably connected to the bottom end of the connecting plate (101) and the main frame (1). The bottom end of the connecting plate (101) is rotatably connected to five claw arms (12). The bottom end of each of the five claw arms (12) is fixedly installed with a claw plate (13). The inside of each of the five claw arms (12) is provided with a sliding groove (121). The outside of the screw (11) is threadedly connected to a movable disk (9). The outside of the outer cylinder (8) is provided with five slots (801). The outside of the movable disk (9) is fixedly installed with five support arms (10). One end of each of the five support arms (10) is fixedly installed with a sliding column (1001). The five sliding columns (1001) are slidably connected to the five sliding grooves (121) respectively.

2. The downhole object retrieval device for oil extraction according to claim 1, characterized in that: An L-shaped plate (18) is fixedly installed at the top of the base frame (21), and a winch (17) is fixedly installed at the top of the L-shaped plate (18). A hoisting rope (16) is fixedly connected to the output end of the winch (17), and one end of the hoisting rope (16) passes through the L-shaped plate (18) and is fixedly installed with a second lifting ring (15).

3. The downhole object retrieval device for oil extraction according to claim 2, characterized in that: The top of the main frame (1) is fixedly installed with a first lifting ring (14), and the first lifting ring (14) is fixedly connected with a second lifting ring (15).

4. The downhole object retrieval device for oil extraction according to claim 3, characterized in that: A control panel (19) is fixedly installed on one side of the L-shaped plate (18), and a push rod (20) is fixedly installed on one side of the L-shaped plate (18).

5. The downhole object retrieval device for oil extraction according to claim 4, characterized in that: The bottom of the base frame (21) is fixedly equipped with four universal self-locking wheels (24), and the bottom of the base frame (21) is fixedly equipped with four hydraulic cylinders (22), and the bottom of each of the four hydraulic cylinders (22) is fixedly equipped with a support plate (23).

6. The downhole object retrieval device for oil extraction according to claim 5, characterized in that: The motor (7), winch (17), and hydraulic cylinder (22) are all electrically connected to the control panel (19).

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