Drill bit fishing device for petroleum drilling
By designing a ratchet and pawl engagement and buffer assembly for a drill bit retrieval device for oil drilling, the problem of magnet failure during drill bit transportation was solved, achieving stable clamping and buffering of the drill bit, improving retrieval reliability and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-14
AI Technical Summary
Existing drill bit retrieval devices for oil drilling often fail to retrieve the bits because the magnets malfunction during transportation due to magnetic field issues.
A drill bit retrieval device for oil drilling was designed, which uses components such as a shell, protective shell, moving plate, rotating plate, ratchet and pawl. The drill bit is firmly clamped by the meshing of the ratchet and pawl, and a buffer component is used to prevent the drill bit from being damaged by rigid collision.
It improves the reliability of drill bit retrieval, ensures that the drill bit is firmly grasped during the retrieval process, avoids damage to the drill bit due to rigid collisions, and reduces maintenance costs.
Smart Images
Figure CN224120217U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil and gas extraction engineering technology, and in particular to a drill bit retrieval device for oil drilling. Background Technology
[0002] Oil drilling refers to the process of drilling deep holes underground using specialized equipment and technology to explore and extract oil resources. Drill bits are used in oil drilling because, as the core rock-breaking tool, they effectively break rocks under drilling pressure and torque due to their special structure and high-strength materials, thus drilling a wellbore that meets extraction requirements. The retrieval device is a specially designed system that, when a drill bit falls into the well due to accidents such as drill pipe breakage or excessive wear, can retrieve it from the bottom of the well using specific grabbing and slinging methods. This prevents delays and increased extraction costs caused by lost drill bits, ensuring the smooth and efficient continuation of oil drilling operations.
[0003] A drill bit retrieval device for oil drilling mainly consists of a connection and guiding mechanism, a gripping mechanism, and a power and control component. The connection and guiding mechanism includes a drill pipe connector and a guide stabilizer. The drill pipe connector securely connects to the drill pipe of the drilling equipment, enabling power transmission and device lowering. The guide stabilizer ensures stable operation of the device within the well, guiding it along a predetermined trajectory to approach the falling drill bit. The gripping mechanism takes various forms, commonly including claw-type and basket-type. The claw-type uses hydraulic or mechanical power to drive the claws and precisely grip the drill bit, while the basket-type utilizes a specially designed basket structure to hold the drill bit. The power and control component provides power to the entire device and controls its operation. The power component can use a hydraulic pump, electric motor, etc., while the control component precisely controls the gripping mechanism's movements based on feedback information from downhole sensors, ensuring efficient and safe drill bit retrieval operations.
[0004] In existing technologies, some oil drilling bit retrieval devices fail to retrieve the bit during transportation due to magnetic field issues after the bit is attracted by a magnet. Therefore, an oil drilling bit retrieval device is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a drill bit retrieval device for oil drilling, which aims to improve the problem in the prior art where, after the drill bit is attracted by a magnet, the magnet fails during transportation due to magnetic field issues, resulting in retrieval failure.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A drill bit retrieval device for oil drilling includes a housing. A protective shell is fixedly connected to the top inner wall of the housing. A movable plate is slidably connected inside the protective shell. Two grooved plates are fixedly connected to the top of the movable plate. A rotating plate is rotatably connected to the top of each of the two grooved plates. A rotating rod is rotatably connected to the top of the rotating plate. Two rotating plates are fixedly connected to the outside of the rotating rod. A ratchet is fixedly connected to the outside of the rotating rod. A fixing block is fixedly connected to the top of the movable plate. A force-applying plate is fixedly connected to the top of the fixing block. A rotating rod is rotatably connected to the inner wall of the protective shell. A pawl is fixedly connected to the outside of the rotating rod. A clamping plate is fixedly connected to the bottom of the rotating plate. A buffer assembly for fixing the drill bit during fixation is rotatably connected to the right side of the clamping plate.
[0008] As a further description of the above technical solution:
[0009] The buffer assembly includes a connecting rod 1, the left side of which is rotatably connected to the right side of the clamping plate, the right side of which is fixedly connected to a right protective cover, the right side of which is slidably connected to a right force plate 2, the left side of which is fixedly connected to a right telescopic rod, and a spring is fixedly connected to the outside of the telescopic rod.
[0010] As a further description of the above technical solution:
[0011] The ratchet is engaged with the pawl, and a connector is fixedly connected to the top of the protective shell.
[0012] As a further description of the above technical solution:
[0013] The rotating rod 2 is externally fixedly connected to a force-bearing plate 1, and the top of the force-applying plate is in contact with the bottom of the force-bearing plate 1.
[0014] As a further description of the above technical solution:
[0015] A magnetic fixing plate is fixedly connected to the bottom of the protective shell, and a movable block is fixedly connected to the inner wall of the magnetic fixing plate. The top of the movable block is in contact with the bottom of the movable plate.
[0016] As a further description of the above technical solution:
[0017] The inner wall of the protective shell is fixedly connected to two guide plates, and the front and rear sides of the movable plate are fixedly connected to connecting plates. The outer side of the connecting plates is slidably connected to the inner wall of the guide plates.
[0018] As a further description of the above technical solution:
[0019] The inner wall of the protective cover is fixedly connected to two guide plates, and the front and rear sides of the force plate are fixedly connected to connecting plates. The opposite sides of the two connecting plates are slidably connected to the opposite sides of the two guide plates.
[0020] As a further description of the above technical solution:
[0021] The rotating plate 2 is externally rotatably connected to the left and right sides of the protective shell. The bottom of the clamping plate is fixedly connected to the fixing block 2. The top of the outer shell is fixedly connected to the connecting rod 2. The connecting rod 2 is internally threaded with a drill rod.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, the movable plate moves, thereby driving the grooved plate and the fixed block one to move, so that the grooved plate causes the rotating plate one to rotate, causing the ratchet to rotate. At this time, the force plate causes the pawl to rotate in front of the ratchet, so that the pawl limits the ratchet and prevents it from rotating back. This achieves the clamping of the drill bit after magnetic attraction. In addition, it can ensure that the drill bit is firmly grasped during the retrieval process, thereby greatly improving the reliability of retrieval.
[0024] 2. In this utility model, the second force plate is subjected to force, which drives the spring and telescopic rod to move. Under the action of the first connecting plate, the force plate moves linearly. Under the action of the spring and telescopic rod, the force plate is buffered, thus realizing the buffering of the drill bit after clamping. In addition, it can prevent the drill bit from being damaged by rigid collision, thereby ensuring the structural integrity of the drill bit during retrieval and reducing maintenance costs. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of a drill bit retrieval device for oil drilling proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the stress plate structure of a drill bit retrieval device for oil drilling proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the rotating rod structure of a drill bit retrieval device for oil drilling proposed in this utility model;
[0028] Figure 4 This is a schematic diagram of the load-bearing plate structure of a drill bit retrieval device for oil drilling proposed in this utility model.
[0029] Legend:
[0030] 1. Outer shell; 2. Moving plate; 3. Grooved plate; 4. Rotating plate one; 5. Rotating rod one; 6. Rotating plate two; 7. Ratchet; 8. Fixing block one; 9. Force-applying plate; 10. Force-receiving plate one; 11. Rotating rod two; 12. Pawl; 13. Clamping plate; 14. Connecting rod one; 15. Protective cover; 16. Force-receiving plate two; 17. Guide plate one; 18. Connecting plate one; 19. Telescopic rod; 20. Spring; 21. Magnet fixing plate; 22. Connecting plate two; 23. Guide plate two; 24. Fixing block two; 25. Protective shell; 26. Connecting rod two; 27. Drill rod. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Reference Figure 2 and Figure 3 This utility model provides an embodiment of a drill bit retrieval device for oil drilling, comprising a housing 1, which is the exterior of the entire device and thus protects it. A protective shell 25 is fixedly connected to the inner top wall of the housing 1, protecting the internal clamping components. A movable plate 2 is slidably connected inside the protective shell 25. The movable plate 2 moves upward under impact. Two grooved plates 3 are fixedly connected to the top of the movable plate 2. A rotating plate 4 is rotatably connected to the top of each grooved plate 3. A rotating rod 5 is rotatably connected to the top of the rotating plate 4. Two rotating plates 6 are fixedly connected to the outside of the rotating rod 5. A ratchet 7 is fixedly connected to the outside of the rotating rod 5. The grooved plates 3 receive the pushing force of the movable plate 2. This causes the rotating plate 4 to rotate, which in turn causes the rotating rod 5 to rotate, which in turn causes the ratchet 7 to rotate, thus driving the rotating plate 6 to rotate. The top of the moving plate 2 is fixedly connected to the fixing block 8, and the top of the fixing block 8 is fixedly connected to the force plate 9. The inner wall of the protective shell 25 is rotatably connected to the rotating rod 11, and the outside of the rotating rod 11 is fixedly connected to the pawl 12. The bottom of the rotating plate 6 is fixedly connected to the clamping plate 13. The rotating rod 11 drives the pawl 12 to rotate, making it stable. The force plate 9 moves with the fixing plate 1, and the fixing plate 1 moves upward with the moving force of the moving plate 2. The clamping plate 13 clamps the drill bit, and the right side of the clamping plate 13 is rotatably connected to a buffer assembly for fixing the drill bit.
[0033] Reference Figure 2 and Figure 4The buffer assembly includes a connecting rod 14. The left side of the connecting rod 14 is rotatably connected to the right side of the clamping plate 13. The connecting rod 14 connects the clamping plate 13 and the buffer assembly to stabilize them. The right side of the connecting rod 14 is fixedly connected to a right protective cover 15. The right side of the protective cover 15 is slidably connected to a force-bearing plate 16. The left side of the force-bearing plate 16 is fixedly connected to a telescopic rod 19. The outside of the telescopic rod 19 is fixedly connected to a spring 20. The protective cover 15 protects the internal buffer assembly. The force-bearing plate 16 receives the impact force of the drill bit and moves accordingly, causing the telescopic rod 19 and the spring 20 to compress and then transfer the elastic force to the force-bearing plate 16.
[0034] Reference Figures 1 to 3 The ratchet 7 is externally engaged with the pawl 12, which limits the ratchet 7, preventing it from rotating. A connector is fixedly connected to the top of the protective shell 25; this connector is the upper part of the retrieval mechanism and drives the lifting and lowering assembly. A force-bearing plate 10 is fixedly connected to the outside of the rotating rod 21. The top of the force-applying plate 9 contacts the bottom of the force-bearing plate 10, which receives the impact force from the force-applying plate 9, thereby driving the rotating rod 21 to rotate. The protective shell 25... A magnetic fixing plate 21 is fixedly connected to the bottom of the moving plate 2. A movable block is fixedly connected to the inner wall of the magnetic fixing plate 21. The top of the movable block contacts the bottom of the moving plate 2. The magnetic fixing plate 21 contacts the drill bit. The movable block receives the impact force of the drill bit, thereby transmitting the force to the moving plate 2. Two guide plates 23 are fixedly connected to the inner wall of the protective shell 25. Connecting plates 22 are fixedly connected to the front and rear sides of the moving plate 2. The outer side of the connecting plates 22 is slidably connected to the inner wall of the guide plates 23. The guide plates 23 are... The connecting plate 22 moves linearly, transmitting the linear motion from the guide plate 23 to the moving plate 22. Two guide plates 17 are fixedly connected to the inner wall of the protective cover 15. Connecting plates 18 are fixedly connected to both the front and rear sides of the force-bearing plate 26. The opposite sides of the two connecting plates 18 are slidably connected to the opposite sides of the two guide plates 17. The guide plates 17 allow the connecting plates 18 to move linearly, thus transmitting the linear motion to the force-bearing plate 26. The rotating plate 26 is externally rotatably connected to the left and right sides of the protective shell 25. The rotating plate 26 receives the rotational force of the rotating rod 5 and thus rotates. The bottom of the clamping plate 13 is fixedly connected to the fixing block 24, which is used to clamp the drill bit and make it stable. The top of the outer shell 1 is fixedly connected to the connecting rod 26. The internal thread of the connecting rod 26 is connected to the drill rod 27. The connecting rod 26 and the drill rod 27 are threaded together, so that the drill rod 27 drives the clamping device to move.
[0035] Working principle: When the drill bit is attracted by the magnet, its inertia causes it to impact the magnet, causing its moving block to impact the moving plate 2. This causes the moving plate 2 to move upward, which in turn moves the grooved plate 3 and the fixing block 8. The grooved plate 3 drives the rotating plate 4 to rotate, which in turn causes the rotating rod 5 to drive the rotating plate 6 and the ratchet 7 to rotate, causing the clamping plate 13 to rotate and clamp the drill bit. The fixing plate 1 then drives the force application plate 9 to move upward, thereby... The force-applying plate 9 impacts the force-receiving plate 10, causing the rotating rod 11 to rotate. The rotating rod 11 then causes the pawl 12 to rotate, which in turn rotates onto the ratchet 7. At this point, the pawl 12 is not easily rotated back under the action of gravity and moves downward, thus being limited by the ratchet 7. This prevents the clamping plate 13 from rotating, thereby clamping the drill bit. This achieves clamping of the drill bit after magnetic attraction and ensures that the drill bit is firmly grasped during the retrieval process, thus greatly improving the reliability of the retrieval.
[0036] When the drill bit is clamped by the clamping plate 13, its force-bearing plate 16 is subjected to force, causing it to move linearly under the action of the connecting plate 18. This compresses the spring 20 and the telescopic rod 19, which store elastic force. The elastic force is then returned to the force-bearing plate 16, causing the force-bearing plate 16 to exert force on the drill bit. Under the action of these two forces, the drill bit is subjected to uniform force under clamping, thus achieving buffering of the drill bit after clamping. In addition, it can prevent the drill bit from being damaged by rigid collisions, thereby ensuring the structural integrity of the drill bit during retrieval and reducing maintenance costs.
[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A drill bit retrieval device for oil drilling, comprising a housing (1), characterized in that: A protective shell (25) is fixedly connected to the top inner wall of the outer shell (1). A movable plate (2) is slidably connected inside the protective shell (25). Two grooved plates (3) are fixedly connected to the top of the movable plate (2). A rotating plate (4) is rotatably connected to the top of each of the two grooved plates (3). A rotating rod (5) is rotatably connected to the top of the rotating plate (4). Two rotating plates (6) are fixedly connected to the outside of the rotating rod (5). A ratchet (7) is fixedly connected to the top of the movable plate (2), a fixing block (8) is fixedly connected to the top of the fixing block (8), a force-applying plate (9) is fixedly connected to the top of the protective shell (25), a rotating rod (11) is rotatably connected to the inner wall of the protective shell (25), a pawl (12) is fixedly connected to the outside of the rotating rod (11), a clamping plate (13) is fixedly connected to the bottom of the rotating plate (6), and a buffer assembly for fixing the drill bit is rotatably connected to the right side of the clamping plate (13).
2. The drill bit retrieval device for oil drilling according to claim 1, characterized in that: The buffer assembly includes a connecting rod (14), the left side of which is rotatably connected to the right side of the clamping plate (13), the right side of which is fixedly connected to a right protective cover (15), the right side of which is slidably connected to a right force plate (16), the left side of which is fixedly connected to a right telescopic rod (19), and a spring (20) is fixedly connected to the outside of the telescopic rod (19).
3. The drill bit retrieval device for oil drilling according to claim 1, characterized in that: The ratchet (7) is engaged with the outside of the pawl (12), and a connector is fixedly connected to the top of the protective shell (25).
4. The drill bit retrieval device for oil drilling according to claim 1, characterized in that: The rotating rod 2 (11) is externally fixedly connected to the force plate 1 (10), and the top of the force plate (9) is in contact with the bottom of the force plate 1 (10).
5. The drill bit retrieval device for oil drilling according to claim 1, characterized in that: A magnetic fixing plate (21) is fixedly connected to the bottom of the protective shell (25), and a moving block is fixedly connected to the inner wall of the magnetic fixing plate (21). The top of the moving block is in contact with the bottom of the moving plate (2).
6. The drill bit retrieval device for oil drilling according to claim 1, characterized in that: The inner wall of the protective shell (25) is fixedly connected to two guide plates (23), and the front and rear sides of the movable plate (2) are fixedly connected to connecting plates (22). The outer side of the connecting plates (22) is slidably connected to the inner wall of the guide plates (23).
7. The drill bit retrieval device for oil drilling according to claim 2, characterized in that: The inner wall of the protective cover (15) is fixedly connected to two guide plates (17), and the front and rear sides of the force plate (16) are fixedly connected to connecting plates (18). The two connecting plates (18) are slidably connected to the two guide plates (17) on opposite sides.
8. The drill bit retrieval device for oil drilling according to claim 1, characterized in that: The rotating plate 2 (6) is externally rotatably connected to the left and right sides of the protective shell (25). The bottom of the clamping plate (13) is fixedly connected to the fixing block 2 (24). The top of the outer shell (1) is fixedly connected to the connecting rod 2 (26). The internal thread of the connecting rod 2 (26) is connected to the drill rod (27).