Well pipe construction and retrieval equipment

Abstract

A well casing retrieval device includes a casing and a clamping structure. The casing has a movable cavity, and the casing wall has an opening communicating with the movable cavity. The clamping structure is rotatably mounted within the opening. When the casing is inserted into a geothermal well casing, it partially or completely retracts into the movable cavity through the opening, and returns to its initial state when exiting the geothermal well casing, thus achieving a secure connection with the geothermal well casing. This well casing retrieval device can retrieve geothermal well casings, has a low overall cost, requires minimal installation space, and offers convenient and quick retrieval.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a well pipe construction and retrieval device. Background Technology

[0002] When the well casing breaks or tilts, it is at a certain height above the ground. Therefore, retrieval requires well casing lifting equipment. Well casing lifting equipment is relatively expensive, and it is also difficult to deploy in areas with small construction areas. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a well pipe construction and retrieval device that can retrieve geothermal well pipes, with low overall cost, no need for a large space for deployment, and convenient and quick retrieval.

[0004] This utility model provides a well pipe construction and retrieval device, including a pipe body and a claw structure. The pipe body has a movable cavity, and the pipe body wall has an opening communicating with the movable cavity. The claw structure is rotatably assembled in the opening, and is used to partially or completely retract into the movable cavity through the opening when the pipe body is inserted into the geothermal well pipe, and to return to the initial state when it is inserted into the geothermal well pipe, so as to achieve a clamping and fixing with the geothermal well pipe.

[0005] In one embodiment, the claw structure includes at least two sets of claw components, which are rotatably assembled in the opening, and the two sets of claw components have different heights.

[0006] In one embodiment, the claw component includes a plurality of claws and a plurality of elastic elements. The claws are rotatably mounted in the corresponding openings, and the elastic elements connect the claws to the outer wall of the tube body, so that the claws are located outside the tube body in the initial state, and the plurality of claws are located at the same height position.

[0007] In one embodiment, the opening includes a small hole segment and a large hole segment, the small hole segment and the large hole segment are connected, the claw is rotatably connected to the small hole segment, and the claw is movably located within the large hole segment.

[0008] In one embodiment, the tube includes a main body segment, a connecting segment, and a hook. The connecting segment is disposed on the main body segment, the hook is disposed on the connecting segment, and the movable cavity and the opening are formed on the main body segment.

[0009] In one embodiment, the pipe body further includes reinforcing ribs that connect the connecting segment and the main body segment.

[0010] The well pipe retrieval device provided by this utility model can retrieve geothermal well pipes. It has a low overall cost, does not require a large space for deployment, and is convenient and quick to retrieve. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 is a structural schematic diagram of the well pipe construction and retrieval device provided by this utility model. Detailed Implementation

[0013] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0014] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection, or... This can be achieved through an intermediate medium for indirect connection. Those skilled in the art will understand the specific meaning of the above terms based on the specific circumstances.

[0015] The terms "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this utility model is usually placed in during use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0017] The terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed. Referring to Figure 1, the well casing construction and retrieval device provided by this utility model includes a casing 1 and a claw structure 3. The casing 1 has a movable cavity inside, and an opening 2 communicating with the movable cavity is provided on the wall of the casing 1. The claw structure 3 is rotatably mounted in the opening 2, and is used to partially or completely retract into the movable cavity through the opening 2 when the casing 1 is inserted into the geothermal well casing, and to return to its initial state when it is withdrawn from the geothermal well casing, thereby achieving a locking and fixing with the geothermal well casing.

[0018] Understandably, during the retrieval operation, the pipe body 1 can be connected and fixed to the retrieval rope. The outer diameter of the pipe body is smaller than the inner diameter of the geothermal well pipe. The pipe body 1 is inserted into the inner cavity of the geothermal well pipe from the top. Under the action of gravity, the pipe body 1 moves downward along the inner cavity of the geothermal well pipe. Under the action of gravity and the action of the inner wall of the geothermal well pipe, the chuck structure 3 will partially or completely retract into the movable cavity, thus facilitating the downward movement of the pipe body 1 along the inner cavity of the geothermal well pipe until it reaches the bottom of the geothermal well pipe where the retrieval device passes through. After passing through, the chuck structure 3 will return to its initial position and remain in the initial state without rotating, thus allowing the chuck structure 3 to engage with the bottom of the geothermal well pipe. Pulling the retrieval rope upward will pull out the geothermal well pipe. After the geothermal well pipe is pulled up, continue to push the pipe body 1 downward to detach the device from the geothermal well pipe.

[0019] Please refer to Figure 1. In some embodiments, the chuck structure 3 includes at least two sets of chuck components. These two sets of chuck components are rotatably mounted within the opening 2, and the heights of the two sets of chuck components are different. It is understood that during the retrieval process, when the two sets of chuck components are at different heights, one set of chuck components will extend outwards and then return to its initial position. The other set will remain inside the geothermal well pipe, generating corresponding friction with the well pipe, thereby improving the stability of the connection between the chuck component and the overall geothermal well pipe.

[0020] Referring to Figure 1, in some embodiments, the claw component includes a plurality of claws 301 and a plurality of elastic elements. 302, the claw 301 is rotatably mounted in the corresponding opening 2, and the elastic element 302 connects the claw 301 and the outer wall of the tube 1 so that the claw 301 is located outside the tube 1 in the initial state, and several claws 301 are located at the same height position.

[0021] It is known that the elastic element 302 can be a spring, and the number of pawls 301 can be four, with each pair positioned opposite the other. When the two pawls 301 are in the initial state, they abut against each other at the ends of the movable cavity of the tube body 1, thereby keeping the pawls 301 in the initial state. When the tube body is inserted into the geothermal well pipe, the pawls 301 rotate under the weight of the tube body 1 and retract completely or partially into the movable cavity of the tube body 1. When the tube body is inserted out of the tube body 1, the spring causes the pawls 301 to return to the initial state.

[0022] Please refer to Figure 1. In some embodiments, the opening 2 includes a small hole segment 201 and a large hole segment 202, which are connected. The claw 301 is rotatably connected to the small hole segment 201 and is movable within the large hole segment 202.

[0023] It is understandable that the size of the large hole section 202 is several times that of the small hole section 201. The chuck 301 can be rotatably connected to the small hole section 201 via a rotating shaft. This setting of the opening 2 can effectively prevent dirt or other issues from affecting the rotation of the chuck 301 between the chuck 301 and the opening 2.

[0024] Please refer to Figure 1. In some embodiments, the tube 1 includes a main body segment 101, a connecting segment, and a hook 103. The connecting segment is disposed on the main body segment 101, the hook 103 is disposed on the connecting segment, and the movable cavity and the opening 2 are formed on the main body segment 101.

[0025] It is known that the main body section 101 and the connecting section can be an integral structure, and the hook 103 can be used to connect the salvage rope, so that the connection with the pipe body 1 is convenient and quick.

[0026] Please continue to refer to Figure 1. In some embodiments, the pipe body 1 also includes a reinforcing rib 102, which connects the connecting section and the main body section 101.

[0027] It is understandable that the reinforcing rib 102 can be a welded connection between the connecting section and the main body section 101, thereby improving the overall strength of the pipe body 1.

[0028] As can be seen from the above description, the well pipe construction and retrieval device provided by this utility model can retrieve geothermal well pipes, with low overall cost and no need for a large space for deployment, making retrieval convenient and quick.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A water well pipe construction fishing device characterized by comprising: The device includes a pipe body and a clamping structure. The pipe body has a movable cavity, and the pipe body wall has an opening communicating with the movable cavity. The clamping structure is rotatably mounted within the opening, allowing it to partially or completely retract into the movable cavity when the pipe body is inserted into the geothermal well pipe, and return to its initial state when it exits the geothermal well pipe, thus achieving a secure clamping connection. The clamping structure includes at least two sets of clamping components, each set rotatably mounted within the opening, with different heights. Each clamping component includes several clamping claws and several elastic elements. The clamping claws are rotatably mounted within their respective openings, and the elastic elements connect the clamping claws to the outer wall of the pipe body, ensuring that the clamping claws are initially located outside the pipe body, with all clamping claws at the same height. The opening includes a small section and a large section, which are connected. The clamping claws are rotatably connected to the small section, and the clamping claws are movably positioned within the large section.

2. The water well pipe construction fishing device according to claim 1, wherein The tube body includes a main body section, a connecting section, and a hook. The connecting section is disposed on the main body section, the hook is disposed on the connecting section, and the movable cavity and the opening are formed on the main body section.

3. The water well pipe construction fishing device of claim 2 wherein, The pipe body also includes reinforcing ribs, which connect the connecting section and the main body section.

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