Fishing spear

Abstract

The utility model relates to the technical field of underground salvage, and provides a salvage spear which comprises an upper connector and a lower connector. The spear body is arranged on the surface of the upper joint; the inner cavity is formed in the inner wall of the upper connector, and a check block is fixedly arranged on the inner wall of the inner cavity; and the hydraulic cylinder is arranged on the inner wall of the inner cavity, and a conical block is fixedly arranged on the surface of the output end of the hydraulic cylinder. According to the utility model, the upper joint is used for mounting, when the hydraulic cylinder works, the conical block is driven to move, and when the conical block is in contact with the L-shaped connecting rods, the L-shaped connecting rods are driven to obliquely work in the connecting block by taking the positioning shaft as a fixed point, so that the other ends of the plurality of L-shaped connecting rods are close to each other, and the two ends of the matched spring are respectively connected to the surfaces of the inner cavity and the L-shaped connecting rods; and the L-shaped connecting rod can be reset conveniently, the clamping piece is matched to clamp an object, the anti-skid pad on the surface is matched to provide anti-skid work, and the phenomenon that normal work is affected due to the fact that the object slides off during moving is prevented.

Description

Technical Field

[0001] This utility model relates to the field of downhole salvage technology, and in particular to a salvage spear. Background Technology

[0002] A retrieval spear is a retrieval tool that can retrieve objects with internal holes, such as drill pipes, tubing, casing, and liners. During well workover, if downhole tubing, liners, or other objects break, become dislodged, or get stuck, they will hinder the normal operation of the workover. Therefore, it is necessary to use a retrieval spear to sink into the fault point, reverse the stuck objects, and retrieve them.

[0003] In the existing technology, the operation of some retrieval spears is complicated, the retrieval effect is poor, it is difficult to clamp the fallen items, the items are easy to fall during the retrieval process, which delays the retrieval time. At the same time, when the retrieval spear is used for a long time, the retrieval parts are prone to wear when moving downhole, and some retrieval parts are not convenient to replace quickly, which affects the normal operation of retrieval. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art: the operation of some existing retrieval spears is complicated, the retrieval effect is poor, it is difficult to clamp the fallen items, the items are easy to fall during the retrieval process, which delays the retrieval time. At the same time, when the retrieval spear is used for a long time, the retrieval parts are prone to wear when moving downhole, and some retrieval parts are inconvenient to replace quickly, which affects the normal operation of retrieval.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a retrieval spear, comprising: an upper connector; a spear body disposed on the surface of the upper connector; and further comprising:

[0006] An inner cavity is formed on the inner wall of the upper connector, and a stop block is fixedly provided on the inner wall of the inner cavity;

[0007] A hydraulic cylinder is disposed on the inner wall of the inner cavity, and a conical block is fixedly disposed on the output end surface of the hydraulic cylinder;

[0008] A sealing ring is movably fitted onto the output end surface of the hydraulic cylinder, and the sealing ring is detachably mounted on the inner wall of the stop block;

[0009] Multiple connecting blocks are disposed on the inner wall of the inner cavity. Positioning shafts are fixedly disposed on the inner walls of the multiple connecting blocks. L-shaped connecting rods are sleeved on the outer surfaces of the multiple positioning shafts. One end of the multiple L-shaped connecting rods is slidably connected to the surface of the conical block.

[0010] Preferably, a spring is provided on one side surface of the plurality of L-links, and one end of the plurality of springs is fixedly installed on the inner wall of the inner cavity.

[0011] The technical advantage of adopting the above-mentioned further solution is that by connecting the two ends of the spring to the surface of the inner cavity and the L-link respectively, it is convenient to provide a reset function for the L-link.

[0012] Preferably, one end of the plurality of L-links is provided with an installation groove, and the inner wall of the plurality of L-links is provided with a threaded hole.

[0013] The technical advantage of adopting the above-mentioned further solution is that the installation groove and threaded hole inside the L-link facilitate the installation of internal parts.

[0014] Preferably, bolts are embedded in the internal threads of the plurality of threaded holes, and mounting blocks are movably embedded in the internal threads of the plurality of mounting slots.

[0015] The technical effect of adopting the above-mentioned further solution is that one end of the threaded hole is threaded into the inside of the bolt to provide positioning, while the mounting groove is used to install the mounting block.

[0016] Preferably, the surfaces of the plurality of mounting blocks are provided with through holes, and the plurality of through holes are movably fitted onto the surface of the bolt.

[0017] The technical effect of adopting the above-mentioned further solution is that the mounting block is fixed by the bolts embedded in the through hole.

[0018] Preferably, one side surface of the plurality of mounting blocks is provided with a clamping member, and one side surface of the plurality of clamping members is provided with an anti-slip pad.

[0019] The technical effect of adopting the above-mentioned further solution is that the clamping component is fixed by the mounting block, and the anti-slip pad on the surface is used to clamp the item.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0021] 1. In this utility model, the upper connector is used for installation. When the hydraulic cylinder works, it drives the conical block to move. When the conical block contacts the L-link, it drives the L-link to tilt inside the connecting block with the positioning shaft as the fixed point, so that the other ends of multiple L-links move closer to each other. The two ends of the spring are respectively connected to the inner cavity and the surface of the L-link, which facilitates the reset of the L-link. The mounting block is movably installed inside the mounting groove. The mounting block is fixed by bolts passing through the through hole and one end being threaded into the threaded hole. This allows the clamping component to clamp the item. The anti-slip pad on the surface provides anti-slip protection to prevent the item from slipping during movement and affecting normal operation.

[0022] 2. In this utility model, the mounting block is fixed by means of a bolt passing through the through hole and having one end threaded into the inside of the threaded hole, thereby enabling the clamping component to clamp the object. When not in use, the mounting block can be easily detached from the inside of the mounting groove by removing the bolt inside the threaded hole, allowing for easy disassembly and quick replacement of the mounting block. Attached Figure Description

[0023] Figure 1 A side view of the structure of a retrieval spear is provided for this utility model;

[0024] Figure 2 This utility model provides a partial cross-sectional structural diagram of a retrieval spear;

[0025] Figure 3 A schematic diagram of a partially unfolded structure of a retrieval spear is provided for this utility model;

[0026] Figure 4 This utility model proposes a retrieval spear. Figure 3 Enlarged structural diagram at point A in the middle.

[0027] Legend:

[0028] 1. Upper connector; 101. Spear body; 1011. Inner cavity; 1012. Stop block; 1013. Sealing ring; 102. Hydraulic cylinder; 1021. Conical block; 103. Connecting block; 1031. Positioning shaft; 1032. L-connecting rod; 1033. Spring; 1034. Mounting groove; 1035. Threaded hole; 1036. Bolt; 104. Mounting block; 1041. Through hole; 1042. Clamping component; 1043. Anti-slip pad. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0031] Example 1, as Figures 1 to 4As shown, this utility model provides a retrieval spear, including: an upper connector 1; a spear body 101 disposed on the surface of the upper connector 1; and further including: an inner cavity 1011 formed on the inner wall of the upper connector 1, with a stop block 1012 fixedly disposed on the inner wall of the inner cavity 1011; a hydraulic cylinder 102 disposed on the inner wall of the inner cavity 1011, with a conical block 1021 fixedly disposed on the output end surface of the hydraulic cylinder 102; a sealing ring 1013 movably sleeved on the output end surface of the hydraulic cylinder 102, and the sealing ring 1013 detachably disposed on the inner wall of the stop block 1012; and multiple connecting blocks 103 disposed on the inner wall of the inner cavity 1011, with a positioning shaft 1031 fixedly disposed on the inner wall of the multiple connecting blocks 103, and L-shaped connecting rods 1032 bearingly sleeved on the outer surface of the multiple positioning shafts 1031, with one end of the multiple L-shaped connecting rods 1032 slidably connected to the surface of the conical block 1021.

[0032] In this embodiment, the upper connector 1 is used for installation. When the hydraulic cylinder 102 works, it drives the conical block 1021 to move. When the conical block 1021 contacts the L-link 1032, it drives the L-link 1032 to tilt inside the connecting block 103 with the positioning shaft 1031 as the fixed point. This causes the other ends of the multiple L-links 1032 to move closer to each other. The two ends of the spring 1033 are respectively connected to the inner cavity 1011 and the surface of the L-link 1032, which facilitates the reset of the L-link 1032. The mounting block 104 is movably installed inside the mounting groove 1034. The mounting block 104 is fixed by bolts 1036 passing through the through hole 1041 and one end being threaded into the threaded hole 1035. This allows the clamping member 1042 to clamp the item. The anti-slip pad 1043 on the surface provides anti-slip protection to prevent the item from slipping during movement and affecting normal operation.

[0033] In Example 2, a spring 1033 is provided on one side surface of a plurality of L-links 1032. One end of the plurality of springs 1033 is fixedly installed on the inner wall of the inner cavity 1011. One end of the plurality of L-links 1032 is provided with a mounting groove 1034. A threaded hole 1035 is provided on the inner wall of the plurality of L-links 1032. A bolt 1036 is embedded in the internal thread of the plurality of threaded holes 1035. A mounting block 104 is movably embedded in the interior of the plurality of mounting grooves 1034. A through hole 1041 is provided on the surface of the plurality of mounting blocks 104. The plurality of through holes 1041 are movably sleeved on the surface of the bolt 1036. A clamping member 1042 is provided on one side surface of the plurality of mounting blocks 104. An anti-slip pad 1043 is provided on one side surface of the plurality of clamping members 1042.

[0034] In this embodiment, the mounting block 104 is fixed by a bolt 1036 passing through the through hole 1041 and having one end threaded into the threaded hole 1035, thereby allowing the clamping member 1042 to clamp the object. When not in use, the mounting block 104 can be easily detached from the mounting groove 1034 by removing the bolt 1036 inside the threaded hole 1035, making it easy to disassemble the mounting block 104 and quickly replace it.

[0035] Working principle: During use, it is installed via the upper connector 1. When the hydraulic cylinder 102 works, it drives the conical block 1021 to move. When the conical block 1021 contacts the L-connecting rod 1032, it drives the L-connecting rod 1032 to tilt inside the connecting block 103 with the positioning shaft 1031 as the fixed point. This causes the other ends of multiple L-connecting rods 1032 to move closer to each other. The two ends of the spring 1033 are respectively connected to the inner cavity 1011 and the surface of the L-connecting rod 1032, facilitating the reset of the L-connecting rod 1032. It is movably mounted on the mounting block 104. Inside the mounting groove 1034, a bolt 1036 passes through the through hole 1041 and is threaded into the threaded hole 1035 to fix the mounting block 104, thereby allowing the clamping member 1042 to clamp the item. The anti-slip pad 1043 on the surface provides anti-slip function to prevent the item from slipping during movement and affecting normal operation. In addition, by removing the bolt 1036 inside the threaded hole 1035, the mounting block 104 can be easily detached from the inside of the mounting groove 1034 for quick replacement.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A salvage spear, comprising: Upper connector (1); The spear body (101) is disposed on the surface of the upper connector (1); characterized in that it further comprises: The inner cavity (1011) is formed on the inner wall of the upper connector (1), and a stop block (1012) is fixedly provided on the inner wall of the inner cavity (1011). A hydraulic cylinder (102) is disposed on the inner wall of the inner cavity (1011), and a conical block (1021) is fixedly disposed on the output end surface of the hydraulic cylinder (102). A sealing ring (1013) is movably sleeved on the output end surface of the hydraulic cylinder (102), and the sealing ring (1013) is detachably mounted on the inner wall of the stop block (1012); Multiple connecting blocks (103) are disposed on the inner wall of the inner cavity (1011). The inner wall of the multiple connecting blocks (103) is fixedly provided with positioning shafts (1031). The outer surface of the multiple positioning shafts (1031) is sleeved with L-connecting rods (1032). One end of the multiple L-connecting rods (1032) is slidably connected to the surface of the conical block (1021).

2. The retrieval spear according to claim 1, characterized in that: A spring (1033) is provided on one side surface of the plurality of L-links (1032), and one end of the plurality of springs (1033) is fixedly installed on the inner wall of the inner cavity (1011).

3. A retrieval spear according to claim 2, characterized in that: One end of each of the L-links (1032) is provided with an installation groove (1034), and the inner wall of each of the L-links (1032) is provided with a threaded hole (1035).

4. A retrieval spear according to claim 3, characterized in that: Bolts (1036) are embedded in the internal threads of the plurality of threaded holes (1035), and mounting blocks (104) are movably embedded in the internal threads of the plurality of mounting slots (1034).

5. A retrieval spear according to claim 4, characterized in that: The surfaces of the plurality of mounting blocks (104) are provided with through holes (1041), and the plurality of through holes (1041) are movably fitted onto the surface of the bolt (1036).

6. A retrieval spear according to claim 5, characterized in that: One side surface of each of the mounting blocks (104) is provided with a clamping member (1042), and one side surface of each of the clamping members (1042) is provided with an anti-slip pad (1043).

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