Inverted lifting fishing spear
By using an inverted lifting and lowering spear design, and combining components such as a central tube, a retrieval rod, a pressure cap, and a spring, the reversal of the retrieval rod and the sliding of the slip are achieved. This solves the problem that existing retrieval spears cannot rotate in both directions, improves the success rate of retrieval, prevents the spear from falling off, and enhances the reliability of retrieval.
Patent Information
- Application Number
- CN202520535791.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-25
AI Technical Summary
The existing retrieval spears used in oil well operations cannot rotate in both directions, resulting in a low success rate in retrieving fallen objects. Furthermore, the spear is prone to detaching when forcibly pulled up, leading to retrieval failure.
A reverse-type lifting and lowering retrieval spear was designed. Through the combination of a central tube, retrieval rod, pressure cap, spring, swivel ring, track pin and slip, the retrieval rod can be reversed and the slip can be slid. When the retrieval rod is lifted, it can lock the top of the fish and rotate in the opposite direction to complete the retrieval. When it is lowered, the slip is released to realize the lifting and lowering function.
It enables forward and reverse rotation of the fishing rod during oil well operations, improving the success rate of retrieving fallen objects, avoiding the problem of the fishing spear falling off, and enhancing the reliability of retrieval.
Smart Images
Figure CN223676215U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a fishing spear equipment technical field, concretely is a kind of inverted buckle type lifting fishing spear. BACKGROUND
[0002] Fishing spear is widely used in oil well exploitation, overhaul construction, and is the tool with more use frequency.It can fish drill pipe, oil pipe, casing pipe, liner, packer, water distributor, accompanying device and other downhole objects with inner hole, and can also carry out inverted operation on stuck downhole object.
[0003] At present, fishing spear used in oil well operation can only grab and fish, and when forcibly lifting, it will be pulled out, resulting in fishing failure, and when trying to rotate or reverse the fished object, the tightness of the fished object changes from tight to loose, and the fishing spear does not have the function of rotating or reversing, resulting in low success rate of fishing downhole objects, so the inverted buckle type lifting fishing spear is proposed to solve the above problems. UTILITY MODEL CONTENTS
[0004] In view of the deficiencies of the prior art, the utility model provides an inverted buckle type lifting fishing spear, which solves the problem that the fishing spear used in oil well operation can only grab and fish, and when forcibly lifting, it will be pulled out, resulting in fishing failure, and when trying to rotate or reverse the fished object, the tightness of the fished object changes from tight to loose, and the fishing spear does not have the function of rotating or reversing, resulting in low success rate of fishing downhole objects.
[0005] To achieve the above purpose, the utility model is realized by the following technical scheme: an inverted buckle type lifting fishing spear, comprising a central pipe, one end of the central pipe is provided with a joint, the other end of the central pipe is inserted with a fishing rod, the middle part of the fishing rod is sleeved with a pressure cap, the outer side of the central pipe is sleeved with a spring, the inner cavity of the pressure cap and the outer side of the fishing rod are sleeved with a swivel, and the middle part of the outer wall of the fishing rod and the side close to the central pipe are provided with a sliding rail groove;
[0006] The middle part of the outer wall of the swivel is provided with a first pin hole, the inner cavity of the first pin hole is provided with a track pin, the fishing rod and the side away from the central pipe are sleeved with a slip, and one end of the slip is inserted into the inner cavity of the pressure cap;
[0007] The side of the outer wall of the slip is provided with a second pin hole, the inner cavity of the second pin hole is inserted with a slip pin, the outer wall of the fishing rod is provided with a reversing groove, one end of the reversing groove is connected with the sliding rail groove, the side of the reversing groove is communicated with a fishing groove, and the other side of the reversing groove is communicated with a release groove.
[0008] Preferably, one end of the spring is connected with one end of the joint, and the other end of the spring is connected with the pressure cap.
[0009] Preferably, the bottom end of the track pin and the slip pin both extend into the sliding track slot.
[0010] Preferably, the outer diameter of the spring is the same as the outer diameter of the pressure cap.
[0011] Preferably, one end of the center tube is rotationally connected to the inner cavity of the joint, and one end of the fishing rod is rotationally connected to the inner cavity of the center tube.
[0012] Beneficial effects
[0013] The utility model provides a kind of inverted type lifting and placing fishing spear.Compared with prior art, it has the following beneficial effects:
[0014] The inverted type lifting and placing fishing spear, when fishing spear is lowered into well, reaches fish top inner cavity, continues to lower fishing spear, fish top (tubing) end face is pressed to the end face of pressure cap and compresses spring, pressure cap inner track pin and slip pin slide with fishing rod track, drive slip to slide, track pin slides to reversing groove position and reverses, switches to fishing groove, then fishing spear is lifted, fishing rod conical surface is pasted with slip conical surface, slip expands, and fish top inner cavity is tightly clamped, at this time, fishing spear is reversely rotated, (opposite direction with fish top connecting screw thread), fish top lower connecting screw thread is opened, and fishing spear is lifted, if fishing spear is lifted, fishing spear cannot be rotated, fishing spear is lowered, pressure cap compresses spring, so that track pin reverses (slip slides under the action of slip pin, and does not rotate) and switches to release groove, and fishing spear is lifted and withdrawn. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is overall sectional structure schematic diagram of the utility model.
[0016] In the drawing: 1, joint; 2, center tube; 3, fishing rod; 4, pressure cap; 5, spring; 6, swivel; 7, sliding track slot; 8, track pin; 9, slip; 10, slip pin; 11, fishing groove. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0018] Please refer to Figure 1The utility model provides a technical scheme: a reverse buckle type lifting and placing fishing spear, the one end of center tube 2 is provided with joint 1, the other end of center tube 2 is inserted with fishing rod 3, the middle part of fishing rod 3 is sleeved with pressure cap 4, the outside of center tube 2 is sleeved with spring 5, the inner chamber of pressure cap 4 and the outside of fishing rod 3 are sleeved with swivel 6, the middle part of the outer wall of fishing rod 3 and close to center tube 2 one side is equipped with slide rail groove 7, the middle part of the outer wall of swivel 6 is equipped with first pin hole, the inner chamber of first pin hole is provided with track pin 8, the fishing rod 3 and away from center tube 2 one side are sleeved with slip 9, and one end of slip 9 is inserted in the inner chamber of pressure cap 4, the outer wall one side of slip 9 is equipped with second pin hole, and the inner chamber of second pin hole is inserted with slip pin 10, and the outer wall one side of fishing rod 3 is equipped with reversing groove, and one end of reversing groove is connected with slide rail groove 7, and reversing groove one side is communicated with fishing groove 11, and reversing groove other side is communicated with release groove,
[0019] When fishing spear is lowered into well, reaches fish top inner chamber, continues to lower fishing spear, fish top (oil pipe) end face is pressed to the end face of pressure cap 4 and compresses spring 5, and track pin 8 and slip pin 10 in pressure cap 4 slide along the track of fishing rod 3, drive slip 9 to slide, and track pin 8 slides to reversing groove position and reverses, switches to fishing groove 11, and then hoists fishing spear, and the taper surface of fishing rod 3 and slip 9 is combined, and slip 9 expands and tightly clamps fish top inner chamber, at this moment, reversely rotates fishing spear, (opposite direction with the thread connection of fish top), and the thread connection of fish top is opened, and hoisting can complete fishing once, if, fishing spear hoists, cannot rotate fishing spear, can lower fishing spear, and pressure cap 4 compresses spring 5, and track pin 8 reverses to reversing groove position (slip 9 only slides under the action of slip pin 10, does not rotate), switches to release groove, and hoisting can exit fishing spear.
[0020] Refer to Figure 1 One end of spring 5 is connected with one end of joint 1, and the other end of spring 5 is connected with pressure cap 4, so that spring 5 can provide elastic force to one end of pressure cap 4.
[0021] Refer to Figure 1 The bottom end of track pin 8 and slip pin 10 extends to the inner chamber of slide rail groove 7, so that track pin 8 and slip pin 10 can be inserted in the inner chamber of slide rail groove 7, and then track pin 8 and slip pin 10 can slide in the inner chamber.
[0022] Refer to Figure 1 The outer diameter of spring 5 is the same as the outer diameter of pressure cap 4, so that spring 5 can be prevented from falling off from pressure cap 4.
[0023] Refer to Figure 1 One end of center tube 2 is rotationally connected with the inner chamber of joint 1, and one end of fishing rod 3 is rotationally connected with the inner chamber of center tube 2, so that center tube 2 can be conveniently assembled with joint 1 and fishing rod 3.
[0024] When the fishing spear is lowered into the well and reaches the inner cavity of the fish head, continue to lower the fishing spear, the end face of the fish head (tubing) presses the end face of the pressure cap 4 to compress the spring 5, the track pin 8 in the pressure cap 4 and the slip pin 10 slide along the track of the fishing rod 3, drive the slip 9 to slide together, the track pin 8 slides to the reversing groove position for reversing, after switching to the fishing groove 11, raise the fishing spear, the taper surface of the fishing rod 3 and the taper surface of the slip 9 are in close contact, the slip 9 is expanded, and the fish head inner cavity is tightly clamped, at this time, reverse the fishing spear (in the opposite direction of the fish head connecting thread), open the fish head lower connecting thread, and raise it, which can complete a fishing, if the fishing spear is raised and cannot be rotated, the fishing spear can be lowered, the pressure cap 4 compresses the spring 5, so that the track pin 8 reverses to the reversing groove position (the slip 9 only slides under the action of the slip pin 10, but does not rotate) and switches to the release groove, and is raised to exit the fishing spear.
[0025] In summary, the device realizes the lifting and lowering function through track reversing, and realizes the back-off function by controlling the slip position through the slip pin and the fishing rod taper surface blocking groove.
[0026] Meanwhile, the contents not described in detail in the specification all belong to the existing technology known to those skilled in the art.
Claims
1. A reverse-catch spear, characterized in that: The utility model provides a fishing tool, which comprises a center pipe (2), one end of the center pipe (2) is provided with a joint (1), the other end of the center pipe (2) is inserted with a fishing rod (3), the middle part of the fishing rod (3) is sleeved with a pressure cap (4), the outer side of the center pipe (2) is sleeved with a spring (5), the inner cavity of the pressure cap (4) and the outer side of the fishing rod (3) are sleeved with a swivel (6), the middle part of the outer wall of the fishing rod (3) and close to one side of the center pipe (2) is provided with a sliding rail groove (7). The middle part of the outer wall of the swivel (6) is provided with a first pin hole, the inner cavity of the first pin hole is provided with a track pin (8), the fishing rod (3) and away from one side of the center pipe (2) are sleeved with a slip (9), one end of the slip (9) is inserted into the inner cavity of the pressure cap (4). The outer wall of the slip (9) is provided with a second pin hole, the inner cavity of the second pin hole is inserted with a slip pin (10), the outer wall of the fishing rod (3) is provided with a reversing groove, one end of the reversing groove is connected with the sliding rail groove (7), the reversing groove is connected with a fishing groove (11) on one side, and the reversing groove is connected with a release groove on the other side.
2. The inverted-draft spear of claim 1, wherein: One end of the spring (5) is connected with one end of the joint (1), and the other end of the spring (5) is connected with the pressure cap (4).
3. The inverted-draft spear of claim 1, wherein: The bottom ends of the track pin (8) and the slip pin (10) extend into the inner cavity of the sliding rail groove (7).
4. The inverted-draft spear of claim 1, wherein: The outer diameter of the spring (5) is the same as the outer diameter of the pressure cap (4).
5. The inverted-draft spear of claim 1, wherein: One end of the center pipe (2) is rotatably connected with the inner cavity of the joint (1), and one end of the fishing rod (3) is rotatably connected with the inner cavity of the center pipe (2).