Lifting fishing spear convenient to dive

Abstract

The utility model discloses a lifting fishing spear convenient to dive, and particularly relates to the technical field of pipeline fishing, which comprises a spear rod, an expanding and supporting component sleeved on the spear rod, a limiting component connected with the expanding and supporting component through a spring, a shaft sleeve pressed and connected with the limiting component, and a connecting head propped against the end part of the spear rod, the spear rod is composed of a spear head, an expanding and supporting part, an expanding and supporting block, a frustum part, a straight rod part and a connecting part, all the parts are matched with one another, smooth diving of the fishing spear and stable connection with a fish are achieved, the expanding and supporting assembly comprises a slip, an expanding and supporting groove and a guide head, the limiting assembly comprises a protective sleeve, an abutting groove and a guide rod, and the guide head is in sliding connection with the guide rod. The lifting type salvage spear solves the problems that a traditional lifting type salvage spear is difficult to dive, unstable in connection, inconvenient to withdraw and the like, has the advantages of being smooth in diving, firm in connection, convenient to withdraw, good in component protection, convenient to install and the like, and improves efficiency and reliability of pipeline salvage operation.

Description

Technical Field

[0001] This utility model relates to the field of pipeline retrieval technology, and more specifically, to a retrieval spear that is easy to dive into. Background Technology

[0002] In pipeline retrieval operations, the lifting-and-drop retrieval spear is a widely used tool. Its simple structure, convenient operation, and relatively easy removal of the fallen fish make it the preferred choice for technicians when the condition of the fallen fish inside the well is unknown.

[0003] However, traditional lifting and lowering retrieval spears still have some problems in practical use. For example, the smoothness of the descent during entry into the fish's interior needs improvement. In complex downhole environments with a lot of debris, it is easy to get obstructed, affecting retrieval efficiency. Regarding the stability of the connection with the fish, it is difficult to guarantee a tight connection under all circumstances, which may lead to the fish falling off during retrieval. In addition, when it is necessary to withdraw the retrieval spear separately, the operation is not simple and quick enough, which may consume more time and effort, delay the retrieval process, and increase operating costs.

[0004] Therefore, developing a retrieval spear that can effectively solve the above problems, facilitates diving, has a stable connection, and is easy to withdraw is of great practical significance. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a convenient underwater-launching and retrieving spear to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a retrieval spear that is easy to dive into, comprising a spear shaft, an expansion assembly sleeved on the spear shaft, a spring connected to one end of the expansion assembly, a limit assembly connected to one end of the spring, a bushing pressed to one end of the limit assembly, and a connector abutting against the end of the spear shaft on one side of the bushing.

[0007] Preferably, the spear shaft includes a spearhead, an expansion section, an expansion block, a frustum section, a straight rod section, and a connecting section. The spearhead is connected to the expansion section, the expansion block is symmetrically arranged on the expansion section, the expansion section is connected to the frustum section, the frustum section is connected to the straight rod section, and the straight rod section is connected to the connecting section.

[0008] Preferably, the diameter of the end where the frustum connects to the expansion section is larger than the diameter of the connection between the frustum and the straight rod, and the diameter of the straight rod is larger than the diameter of the connection.

[0009] Preferably, the expansion assembly includes a clamp, an expansion groove, and a guide head. The clamp has symmetrical expansion grooves, and the clamp is connected to the guide head.

[0010] Preferably, the limiting component includes a sheath, a pressing groove, and guide rods. One end of the sheath has a pressing groove, and multiple guide rods are arranged in a ring around the outside of the pressing groove.

[0011] Preferably, the outer surface of the guide head is provided with multiple guide grooves, and each guide rod is slidably connected to the corresponding guide groove.

[0012] Preferably, one end of the guide head has an annular groove, one end of the spring abuts against the pressing groove, and the other end of the spring abuts against the annular groove.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. The expansion section, expansion block, and cone section work together to make the retrieval spear descend into the fish more smoothly. The expansion block of the expansion section can open the slips of the expansion component. As the expansion block goes deeper into the expansion groove, the slips make closer contact with the inner wall of the fish, and the connection becomes tighter and tighter, effectively preventing the fish from falling off during the retrieval process.

[0015] 2. When it is necessary to withdraw the spear, simply lower the spear shaft to move the slip to the conical part. The slip will loosen its connection with the inner wall of the fish. Rotate the spear shaft to displace the expansion block from the expansion groove, and you can withdraw it directly. The operation is simple and quick.

[0016] 3. The guide rod of the limiting component is slidably connected to the guide groove of the guide head of the expansion component, which ensures that the spring and the spear rod are coaxial, avoids excessive friction between the spring and the spear rod when the spring is compressed, and extends the service life of the spring; at the same time, when the spear rod is rotated to withdraw the spear, it can prevent the sheath from rotating synchronously, which makes it easier to adjust the misalignment between the expansion block and the expansion groove and improves the withdrawal efficiency.

[0017] 4. The stepped structure of the straight rod and the connecting part of the spear shaft plays a limiting role in the installation of the limiting component; the connecting part is threaded to facilitate the disassembly and assembly of the connector, thereby facilitating the disassembly and maintenance of the bushing, limiting component, spring and expansion component. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the spear shaft of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the expansion component of this utility model.

[0022] Figure 5This is a schematic diagram of the limiting component of this utility model.

[0023] The reference numerals in the attached drawings are as follows: 1. Spear shaft; 101. Spear head; 102. Expanding part; 103. Expanding block; 104. Frustum part; 105. Straight rod part; 106. Connecting part; 2. Expanding assembly; 201. Slip; 202. Expanding groove; 203. Guide head; 3. Spring; 4. Limiting assembly; 401. Sheath; 402. Pressing groove; 403. Guide rod; 5. Bushing; 6. Connecting head; 7. Guide groove. Detailed Implementation

[0024] 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.

[0025] As attached Figures 1-5 The spear shown is a convenient diving and launching spear, including a spear shaft 1, on which an expansion assembly 2 is sleeved. One end of the expansion assembly 2 is connected to a spring 3, and one end of the spring 3 is connected to a limiting assembly 4. One end of the limiting assembly 4 is pressed against a bushing 5, and one side of the bushing 5 abuts against a connector 6 connected to the end of the spear shaft 1.

[0026] In practice, by connecting its connector 6 to the retrieval column, the pump is turned on to circulate as the retrieval column descends to the vicinity of the fallen fish, washing away debris at the fish's location. Then, the retrieval spear is slowly lowered, allowing the bottom of the spear shaft 1 to enter the fish. Further lowering causes the expansion assembly 2 to be squeezed into the fish as well. Then, the spear shaft 1 is lifted, and the expansion assembly 2, supported by the expansion block 103 on the spear shaft 1, presses against the inner wall of the fish. Under the action of the expansion part 102 in the spear shaft 1, the expansion assembly 2 is secured... The serrations at the lower end of the slip 201 become increasingly tighter against the inner circumference of the fallen fish. If the fallen fish is lifted, continue to lift it until the casing or tubing that has fallen into the well is retrieved. If it is necessary to withdraw the retrieval spear separately, simply continue to lower the spear shaft 1 so that the slip 201 moves to the conical part 104, thereby loosening the connection between the slip 201 and the inner wall of the fallen fish or tubing. Rotate the spear shaft 1 so that the expansion block 103 and the expansion groove 202 are misaligned, thereby preventing the slip 201 from continuing to expand and allowing it to be withdrawn directly.

[0027] The spear shaft 1 includes a spearhead 101, a support portion 102, a support block 103, a frustum portion 104, a straight rod portion 105, and a connecting portion 106. The spearhead 101 is connected to the support portion 102. The support block 103 is symmetrically arranged on the support portion 102. The support portion 102 is connected to the frustum portion 104. The frustum portion 104 is connected to the straight rod portion 105. The straight rod portion 105 is connected to the connecting portion 106.

[0028] The diameter of the end where the frustum portion 104 connects to the expansion portion 102 is larger than the diameter of the connection between the frustum portion 104 and the straight rod portion 105, and the diameter of the straight rod portion 105 is larger than the diameter of the connecting portion 106.

[0029] In specific implementation, the expansion section 102 is used to expand the slip 201. During the expansion process, the expansion block 103 is inserted into the expansion groove 202, opening the expansion groove 202 and causing the slip 201 to expand outward, thus allowing the slip 201 to abut against the inner wall of the pipe. As the expansion block 103 moves deeper into the expansion groove 202, the cross-section of the slip 201 end in contact with the expansion section 102 increases, thereby achieving a tighter and tighter pull. The diameter of the frustum section 104 gradually decreases from the point of engagement with the expansion section 102 to the other end, allowing the bottom of the slip 201 to penetrate deeper into the pipe during the downward movement of the spear 1. During the pullback, this increases the bonding strength between the slip 201 and the pipe. When the spear shank 1 is rotated and the expansion block 103 is pulled back away from the expansion groove 202, the slip 201 is in the frustum portion 104, giving the slip 201 a large inward space, which facilitates its removal. The diameter of the straight rod portion 105 is larger than that of the connecting portion 106, creating a stepped structure at the connection between the straight rod portion 105 and the connecting portion 106. This provides a limiting effect when installing the limiting component 4, preventing it from floating up and down. The end of the connecting portion 106 is threaded, facilitating connection and fixation with the connector 6. During disassembly and assembly, the bushing 5, the limiting component 4, the spring 3, and the expansion component 2 can be disassembled directly by removing the connector 6, improving the ease of disassembly and assembly.

[0030] The expansion component 2 includes a clip 201, an expansion groove 202, and a guide head 203. The clip 201 has symmetrical expansion grooves 202, and the clip 201 is connected to the guide head 203.

[0031] The limiting component 4 includes a protective sleeve 401, a pressing groove 402, and a guide rod 403. One end of the protective sleeve 401 is provided with a pressing groove 402, and multiple guide rods 403 are arranged in a ring around the outside of the pressing groove 402.

[0032] The outer surface of the guide head 203 is provided with a plurality of guide grooves 7, and each guide rod 403 is slidably connected to the corresponding guide groove 7.

[0033] In practice, during the process of individually withdrawing the spear by rotating the spear rod 1, the slip 201 rests against the inner wall of the pipe. When rotating the spear rod 1, the sleeve 401 is pressed against the bushing 5, allowing the spear rod 1 to rotate independently. This avoids the sleeve 401 being fixed, which would cause it to rotate synchronously and exert force on the spring 3, causing the slip 201 to rotate as well. This would make it difficult to adjust the misalignment between the expansion block 103 and the expansion groove 202. Thus, when withdrawing the spear individually, rotating the spear rod 1 allows it to rotate independently, quickly adjusting the misalignment between the expansion block 103 and the expansion groove 202, thereby improving the ease of withdrawal.

[0034] The guide head 203 has an annular groove at one end, and one end of the spring 3 abuts against the pressure groove 402, while the other end of the spring 3 abuts against the annular groove.

[0035] In practice, each guide rod 403 is slidably connected to the guide groove 7, so that the sheath 401, the guide head 203 and the spear rod 1 are coaxially arranged, thereby making the spring 3 coaxial with the spear rod 1. This avoids the spring 3 from sticking to the spear rod 1 when compressed, thus avoiding large friction and protecting the spring 3 and improving its service life.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 spear for easy submersion and retrieval, comprising a spear shaft (1), characterized in that: The lance (1) is sleeved with a expansion assembly (2), one end of the expansion assembly (2) is connected with a spring (3), one end of the spring (3) is connected with a limiting assembly (4), one end of the limiting assembly (4) is crimped with a shaft sleeve (5), one side of the shaft sleeve (5) abuts against a connector (6) connected with the end of the lance (1).

2. A self-deploying spear according to claim 1, wherein: The lance (1) comprises a lance head (101), an expansion part (102), an expansion block (103), a frustum part (104), a straight rod part (105) and a connecting part (106), the lance head (101) is connected with the expansion part (102), the expansion part (102) is symmetrically provided with the expansion block (103), the expansion part (102) is connected with the frustum part (104), the frustum part (104) is connected with the straight rod part (105), and the straight rod part (105) is connected with the connecting part (106).

3. A self-deploying spear according to claim 2, wherein: The diameter size of the end of the frustum part (104) connected with the expansion part (102) is greater than the diameter size of the connecting part of the frustum part (104) and the straight rod part (105), and the diameter size of the straight rod part (105) is greater than the diameter size of the connecting part (106).

4. A self-deploying spear according to claim 3, wherein: The expansion assembly (2) comprises a slip (201), an expansion groove (202) and a guide head (203), the slip (201) is symmetrically provided with the expansion groove (202), and the slip (201) is connected with the guide head (203).

5. A self-deploying spear according to claim 4, wherein: The limiting assembly (4) comprises a sheath (401), a pressing groove (402) and a guide rod (403), one end of the sheath (401) is provided with the pressing groove (402), and the outer side of the pressing groove (402) is annularly provided with a plurality of guide rods (403).

6. A self-deploying spear according to claim 5, wherein: A plurality of guide grooves (7) are formed in the outer surface of the guide head (203), and each guide rod (403) is slidably connected with a corresponding guide groove (7).

7. A self-deploying spear according to claim 6, wherein: One end of the guide head (203) is provided with an annular groove, one end of the spring (3) abuts against the pressing groove (402), and the other end of the spring (3) abuts against the annular groove.

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