A fishing device for downhole operations

Abstract

This utility model discloses a retrieval device for downhole operations, relating to the technical field of downhole operation equipment. The retrieval device includes a ferrule, a connecting rod, and a hydraulic rod. The connecting rod is located at the top of the ferrule, and the hydraulic rod is located inside the ferrule. An expansion tube is provided inside the ferrule, and an anti-slip thread is provided on the outside of the expansion tube. A cutting slit is formed on the expansion tube, dividing the lower half of the expansion tube into multiple groups of expansion strips. A locking block is connected to the inside of each expansion strip. This retrieval device, by setting up the expansion tube, expansion strips, and locking block, can firmly grasp objects of different sizes when driven by the hydraulic rod, making it widely applicable. The anti-slip thread on the outside of the expansion tube increases the friction between the expansion tube and the object, further improving the reliability of the grasp and preventing the object from falling off. A spiral-shaped pickup tip is provided at the bottom of the ferrule for easy insertion into gaps around the object.

Description

Technical Field

[0001] This utility model relates to the field of downhole operation equipment technology, specifically a retrieval device for downhole operations. Background Technology

[0002] During underground operations in oil fields, mines, and other places, tools, parts, and other objects often fall off. If these objects are not retrieved in time, they may affect the normal progress of subsequent operations or even cause equipment damage and safety accidents.

[0003] There are many types of commonly used downhole fishing devices, such as fishing spears and fishing tubes. However, these devices often have problems such as unstable gripping, limited applicability, and complicated operation, making it difficult to meet the fishing needs of objects of different sizes and shapes.

[0004] Therefore, there is a need for a downhole retrieval device that is simple in structure, easy to operate, reliable in grabbing, and widely applicable, in order to overcome the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this utility model is to provide a retrieval device for downhole operations to solve the problems mentioned in the background art. To achieve the above objective, this utility model is implemented through the following technical solution: A retrieval device for downhole operations includes a ferrule, a connecting rod, and a hydraulic rod. The connecting rod is located at the top of the ferrule, and the hydraulic rod is located inside the ferrule. An expansion tube is provided inside the ferrule, and an anti-slip thread is provided on the outside of the expansion tube. A cutting slit is formed on the expansion tube, and the cutting slit evenly divides the lower half of the expansion tube into multiple groups of expansion strips. A locking block is connected to the inner side of each expansion strip.

[0006] Preferably, the top of the sleeve is connected to a hexagonal prism, the top of the hexagonal prism is connected to an insertion tube, a positioning pin is inserted into the inner side of the sleeve, and a spirally protruding downward picking tip is provided at the bottom of the sleeve.

[0007] Preferably, a sleeve is connected to the bottom of the connecting rod, the sleeve is fitted onto the outside of the insertion tube, and the sleeve and the insertion tube are threaded together.

[0008] Preferably, the hydraulic rod is inserted into the inside of the hexagonal prism and located inside the insertion tube, and the outer side of the hydraulic rod is symmetrically provided with slots, and the output end of the hydraulic rod is sleeved with a slider.

[0009] Preferably, the slot corresponds to the positioning pin, and the slot engages with the inside of the positioning pin.

[0010] Preferably, the slider is located inside the card block, and the slider can push the card block outward.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] By setting up expansion tubes, expansion bars, and locking blocks, and driven by hydraulic rods, it can firmly grasp objects of different sizes, making it widely applicable.

[0013] The expansion tube is equipped with anti-slip threads on the outside, which can increase the friction between the tube and the falling object, further improving the reliability of the grip and preventing the object from falling off.

[0014] The bottom of the retrieval sleeve is equipped with a spiral-shaped pickup tip, which makes it easy to insert into the gaps around the fallen object, thus improving the success rate of retrieval.

[0015] Most of the components are connected by threaded joints and plug-in joints, which makes the structure simple, easy to install and disassemble, and convenient for maintenance and replacement. The cooperation between the positioning pin and the slot ensures the stability of the hydraulic rod during operation and improves the safety of the device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the card sleeve of this utility model;

[0020] Figure 4 This is a schematic diagram of the hydraulic rod of this utility model.

[0021] In the diagram: 1. Sleeve; 11. Hexagonal prism; 111. Insert tube; 12. Expansion tube; 121. Anti-slip thread; 122. Cutting slit; 123. Expansion strip; 124. Locking block; 13. Positioning pin; 14. Pick-up tip; 2. Connecting rod; 21. Sleeve; 3. Hydraulic rod; 31. Slot; 32. Slider. Detailed Implementation

[0022] 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.

[0023] This application provides a retrieval device for downhole operations, which solves the problems of existing devices such as weak gripping, limited applicability, and complex operation, making it difficult to meet the retrieval needs of objects of different sizes and shapes, and achieves the firm gripping of objects of different sizes.

[0024] This utility model discloses a retrieval device for downhole operations.

[0025] Example 1: According to the appendix Figure 1-4 As shown, it includes a sleeve 1, a connecting rod 2, and a hydraulic rod 3. The connecting rod 2 is located at the top of the sleeve 1, and the hydraulic rod 3 is located inside the sleeve 1. An expansion tube 12 is provided inside the sleeve 1, and an anti-slip thread 121 is provided on the outside of the expansion tube 12. A cutting slit 122 is opened on the expansion tube 12, and the cutting slit 122 divides the lower half of the expansion tube 12 into multiple groups of expansion strips 123. A locking block 124 is connected to the inside of the expansion strips 123.

[0026] Furthermore, a hexagonal prism 11 is connected to the top of the sleeve 1, and an insertion tube 111 is connected to the top of the hexagonal prism 11. A positioning pin 13 is inserted into the inside of the sleeve 1, and a spirally protruding downward picking tip 14 is provided at the bottom of the sleeve 1.

[0027] By setting up the expansion tube 12, expansion bar 123, and locking block 124, the hydraulic rod 3 can firmly grasp objects of different sizes, making it widely applicable. The expansion tube 12 has anti-slip threads 121 on its outer side, which increases the friction between the expansion tube and the object, further improving the reliability of the grasp and preventing the object from falling off. The bottom of the locking sleeve 1 has a spiral-shaped pickup tip 14, which is easy to insert into the gaps around the object, improving the success rate of retrieval. Most of the components are connected by threads and plugs, which makes the structure simple, easy to install and disassemble, and easy to maintain and replace. The positioning pin 13 and the locking groove 31 work together to ensure the stability of the hydraulic rod 3 during operation and improve the safety of the device.

[0028] Furthermore, a sleeve 21 is connected to the bottom of the connecting rod 2. The sleeve 21 is fitted onto the outside of the insertion tube 111, and the sleeve 21 and the insertion tube 111 are threaded together.

[0029] Specifically disclosed, the hydraulic rod 3 is inserted into the inside of the hexagonal prism 11 and located inside the insertion tube 111. The outer side of the hydraulic rod 3 is symmetrically provided with slots 31, and the output end of the hydraulic rod 3 is sleeved with a slider 32.

[0030] Specifically, the slot 31 corresponds to the positioning pin 13, and the slot 31 is engaged inside the positioning pin 13.

[0031] Example 2: Includes a sleeve 1, a connecting rod 2, and a hydraulic rod 3. The connecting rod 2 is located at the top of the sleeve 1, and the hydraulic rod 3 is located inside the sleeve 1. An expansion tube 12 is provided inside the sleeve 1, and an anti-slip thread 121 is provided on the outside of the expansion tube 12. A cutting slit 122 is provided on the expansion tube 12, which divides the lower half of the expansion tube 12 into multiple groups of expansion strips 123. A locking block 124 is connected to the inside of the expansion strips 123.

[0032] It is important to emphasize that slider 32 is located inside block 124, and slider 32 can push block 124 outward.

[0033] Working principle:

[0034] In use, the device is connected to the external lifting equipment via the connecting rod 2, and the device is lowered to the location of the object to be dropped into the well.

[0035] Then, the picking tip 14 at the bottom of the ferrule 1 is inserted into the gap around the falling object, so that the ferrule 1 can accurately catch the falling object in the well and improve the stability of the gripping.

[0036] Finally, the output end of the hydraulic rod 3 is extended by the external control device, which drives the slider 32 to move downward. The slider 32 pushes the locking block 124, causing the expansion strip 123 to open outward. The locking block 124 is in close contact with the inside of the falling object. The anti-slip thread 121 increases the friction and achieves a firm grip on the falling object.

[0037] After the object is grabbed, the device and the object are lifted to the ground together by the lifting equipment. Then, the output end of the hydraulic rod 3 is retracted, the slider 32 moves upward, and the expansion bar 123 contracts under its own elasticity, releasing the object and completing the salvage operation.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A retrieval device for downhole operations, comprising a ferrule (1), a connecting rod (2), and a hydraulic rod (3), wherein the connecting rod (2) is located at the top of the ferrule (1), and the hydraulic rod (3) is located inside the ferrule (1), characterized in that, An expansion tube (12) is provided on the inner side of the sleeve (1), and an anti-slip thread (121) is provided on the outer side of the expansion tube (12). A cutting slit (122) is provided on the expansion tube (12), and the cutting slit (122) divides the lower half of the expansion tube (12) into multiple groups of expansion strips (123). A locking block (124) is connected to the inner side of the expansion strip (123).

2. The downhole fishing device according to claim 1, characterized in that, The top of the sleeve (1) is connected to a hexagonal prism (11), the top of the hexagonal prism (11) is connected to a tube (111), a positioning pin (13) is inserted into the inside of the sleeve (1), and a spiral downward protruding picking tip (14) is provided at the bottom of the sleeve (1).

3. The downhole fishing device according to claim 1, characterized in that, The bottom of the connecting rod (2) is connected to a sleeve (21), which is sleeved on the outside of the insertion tube (111), and the sleeve (21) and the insertion tube (111) are threaded together.

4. A retrieval device for downhole operations according to claim 1, characterized in that, The hydraulic rod (3) is inserted into the inside of the hexagonal prism (11) and located inside the insertion tube (111). The hydraulic rod (3) has symmetrical slots (31) on its outer side, and a slider (32) is sleeved on the outer side of the output end of the hydraulic rod (3).

5. A retrieval device for downhole operations according to claim 4, characterized in that, The slot (31) corresponds to the positioning pin (13), and the slot (31) is engaged inside the positioning pin (13).

6. A retrieval device for downhole operations according to claim 5, characterized in that, The slider (32) is located inside the block (124), and the slider (32) can push the block (124) outward.

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