Fishing socket

Abstract

The utility model relates to a fishing socket which comprises a fishing socket body connected with a drill rod, the lower portion of the fishing socket body is provided with a fishing cavity extending from bottom to top, the lower end of the fishing socket body is provided with a leading-in structure facilitating falling objects to enter the fishing cavity, and a magnet used for attracting the falling objects is fixedly arranged on the outer wall of the fishing socket body. The fishing socket body is of the barrel-shaped structure with the fishing cavity, small fallen objects which are fished can be effectively protected, and the fallen objects are prevented from falling off due to the fact that the fallen objects are connected with the well wall in the pulling-out process. The magnet on the outer wall of the fishing socket body is used for adsorbing metal falling objects, so that the metal falling objects can be conveniently fished up; through the arrangement of the communicating hole and the backflow hole, local reverse circulation is conveniently formed, the Venturi effect is achieved, and small falling objects can be promoted to enter the fishing cavity of the fishing barrel body; and the introduction structure at the bottom of the fishing socket body can be used for correcting small falling objects so that the small falling objects can be smoothly introduced into the fishing cavity.

Description

Technical Field

[0001] This utility model belongs to the technical field of oilfield salvage tools, specifically relating to a salvage cylinder. Background Technology

[0002] During oilfield development, metal fragments sometimes fall into wells. If these fragments are not handled promptly, they can affect oil and gas production, and in severe cases, even cause production accidents. Therefore, metal fragments that fall into wells should be retrieved in a timely manner. However, existing retrieval tools are not very effective at retrieving small metal fragments, so there is an urgent need for a retrieval structure specifically designed for small objects. Utility Model Content

[0003] To address all or some of the aforementioned problems, the present invention aims to provide a retrieval cylinder. The cylinder body is a cylindrical structure with a retrieval cavity, which effectively protects small objects being retrieved and prevents them from falling back into the wellbore during the tripping process. Magnets on the outer wall of the cylinder body are used to attract metallic objects, facilitating their retrieval. An introduction structure at the bottom of the cylinder body can orient small objects so they can be smoothly guided into the retrieval cavity. The retrieval cylinder of this invention has a superior retrieval effect.

[0004] According to one aspect of the present invention, a retrieval cylinder is provided, including a retrieval cylinder body connected to a drill rod, wherein the lower part of the retrieval cylinder body is provided with a retrieval cavity extending from bottom to top, and the lower end of the retrieval cylinder body is provided with an introduction structure to facilitate the entry of fallen objects into the retrieval cavity, and a magnet for adsorbing fallen objects is fixedly provided on the outer wall of the retrieval cylinder body.

[0005] Furthermore, the upper end of the retrieval cylinder body is provided with a threaded hole extending from top to bottom, and the retrieval cylinder body is connected to the drill rod through the threaded hole.

[0006] Furthermore, the retrieval cylinder body is provided with a diversion hole that connects the threaded hole to the outside of the retrieval cylinder body below it, and the diameter of the diversion hole is smaller than the diameter of the threaded hole.

[0007] Furthermore, the retrieval cylinder body is also provided with a connecting hole that connects the retrieval cavity and the threaded hole. The diameter of the connecting hole is smaller than the diameter of the retrieval cavity and smaller than the diameter of the threaded hole.

[0008] Furthermore, the retrieval cylinder body is provided with a return hole that connects the retrieval cavity to the outside of the retrieval cylinder body above it, and the diameter of the return hole is smaller than the diameter of the retrieval cavity.

[0009] Furthermore, the outer wall of the retrieval tube body is provided with a number of magnet mounting holes, and a magnet is fixedly installed in each of the magnet mounting holes.

[0010] Furthermore, the outer wall of the retrieval cylinder body is provided with a fixing groove that mates with all the magnets at the same height. All the magnets at the same height are fixed in their respective magnet mounting holes by snap rings provided in the fixing groove.

[0011] Furthermore, a marking groove is provided on the outer wall of the retrieval cylinder body.

[0012] Furthermore, the introduction structure is a spiral introduction head disposed at the lower end of the retrieval cylinder body.

[0013] As can be seen from the above technical solution, the retrieval tube provided by this utility model has the following beneficial effects:

[0014] The retrieval cylinder body of this utility model is a cylindrical structure with a retrieval cavity, which can effectively protect small objects that are retrieved and prevent them from falling off the well wall during the tripping process. The magnet on the outer wall of the retrieval cylinder body is used to attract metal objects, making it easier to retrieve them. The setting of the connecting hole and the return hole facilitates the formation of local reverse circulation, which has a Venturi effect and can promote the small objects to enter the retrieval cavity of the retrieval cylinder body. The introduction structure at the bottom of the retrieval cylinder body can straighten the small objects so that they can be smoothly guided into the retrieval cavity. Attached Figure Description

[0015] Figure 1 This is a front view of the retrieval tube according to an embodiment of the present utility model;

[0016] Figure 2 This is a side view of the retrieval tube according to an embodiment of the present utility model;

[0017] Figure 3 This is a cross-sectional view of the retrieval tube according to an embodiment of the present invention. Detailed Implementation

[0018] To better understand the purpose, structure, and function of this utility model, a retrieval tube of this utility model will be described in further detail below with reference to the accompanying drawings.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown, it illustrates a retrieval tube according to an embodiment of the present invention, including a retrieval tube body 1 connected to a drill rod, a retrieval cavity 8 extending from bottom to top at the lower part of the retrieval tube body 1, an introduction structure at the lower end of the retrieval tube body 1 to facilitate the entry of fallen objects into the retrieval cavity 8, and a magnet 7 for adsorbing fallen objects is fixedly installed on the outer wall of the retrieval tube body 1.

[0020] The retrieval tube in this embodiment includes a retrieval tube body 1. The upper end of the retrieval tube body 1 is provided with a threaded hole 2 extending from top to bottom. The threaded hole 2 facilitates the connection between the retrieval tube body 1 and the drill pipe, so that the retrieval tube can be easily lowered into the well through the drill pipe.

[0021] In this embodiment, the structure introduced here is designed to facilitate the entry of the dropped object into the retrieval chamber 8. The dropped object is attracted by the magnet 7 and remains in the retrieval chamber 8. Thus, the retrieval chamber 8 in this embodiment can effectively protect the small dropped object being retrieved and prevent it from falling off the well wall during the drilling process.

[0022] In practice, for example, magnet 7 is fixed on the outer wall of the retrieval tube body 1 corresponding to the position of retrieval cavity 8.

[0023] In practice, the size of the retrieval tube body 1 can be adjusted according to the size of the small falling object, thereby facilitating the adjustment of the magnetic force distribution of the magnet 7.

[0024] For example, the introduction structure is a spiral introduction head 9 set at the lower end of the retrieval tube body 1.

[0025] The retrieval cylinder body 1 is provided with a diversion hole 4 that connects the threaded hole 2 to the outside of the retrieval cylinder body 1 below it. The diameter of the diversion hole 4 is smaller than the diameter of the threaded hole 2.

[0026] The retrieval cylinder body 1 is also provided with a connecting hole 10 that connects the retrieval cavity 8 and the threaded hole 2. The diameter of the connecting hole 10 is smaller than the diameter of the retrieval cavity 8 and smaller than the diameter of the threaded hole 2.

[0027] The retrieval cylinder body 1 is provided with a return hole 5 that connects the retrieval chamber 8 with the outside of the retrieval cylinder body 1 above it. The diameter of the return hole 5 is smaller than the diameter of the retrieval chamber 8.

[0028] In this embodiment, the connection hole 10 and the return hole 5 are designed to form a local reverse circulation, which has a Venturi effect and can promote small objects to enter the retrieval chamber 8 of the retrieval cylinder body 1.

[0029] The outer wall of the retrieval tube body 1 is provided with several magnet 7 mounting holes, and a magnet 7 is fixedly installed in each magnet 7 mounting hole.

[0030] The outer wall of the retrieval cylinder body 1 is provided with a fixing groove that cooperates with all the magnets 7 at the same height. All the magnets 7 at the same height are fixed in their respective magnet 7 mounting holes by snap rings 6 set in the fixing groove.

[0031] In this embodiment, all magnets 7 at the same height are fixed by a retaining spring 6 set in the fixing groove, which has the advantage of convenient installation. As an alternative, the retaining spring 6 can be replaced with a ring made of rope set in the fixing groove.

[0032] The outer wall of the retrieval cylinder body 1 is provided with a marking groove 3.

[0033] The retrieval tube of this utility model embodiment has a cylindrical structure 1 with a retrieval cavity 8, which can effectively protect small objects that are retrieved and prevent them from falling off the well wall during the drilling process. The magnet 7 mounting holes on the outer wall of the retrieval tube body 1 are provided for easy installation of magnets 7. The size of the retrieval tube body 1 can be adjusted according to the size of the small objects, which facilitates the adjustment of the magnetic force distribution. The connection hole 10 and the return hole 5 facilitate the formation of local reverse circulation, which has a Venturi effect and can promote the small objects to enter the retrieval cavity 8 of the retrieval tube body 1. The introduction structure at the bottom of the retrieval tube body 1 can straighten the small objects so that they can be smoothly guided into the retrieval cavity 8.

[0034] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fishing socket, characterized in that, The device includes a retrieval cylinder body connected to the drill pipe. The lower part of the retrieval cylinder body is provided with a retrieval cavity extending from bottom to top. The lower end of the retrieval cylinder body is provided with an introduction structure to facilitate the entry of fallen objects into the retrieval cavity. Magnets for adsorbing fallen objects are fixedly installed on the outer wall of the retrieval cylinder body.

2. The socket of claim 1, wherein, The upper end of the retrieval cylinder body is provided with a threaded hole extending from top to bottom, and the retrieval cylinder body is connected to the drill rod through the threaded hole.

3. The socket of claim 2, wherein, The retrieval cylinder body is provided with a diversion hole that connects the threaded hole to the outside of the retrieval cylinder body below it, and the diameter of the diversion hole is smaller than the diameter of the threaded hole.

4. The socket of claim 3, wherein, The retrieval cylinder body is also provided with a connecting hole that connects the retrieval cavity and the threaded hole. The diameter of the connecting hole is smaller than the diameter of the retrieval cavity and smaller than the diameter of the threaded hole.

5. The socket of claim 1, wherein, The retrieval cylinder body is provided with a return hole that connects the retrieval cavity to the outside of the retrieval cylinder body above it, and the diameter of the return hole is smaller than the diameter of the retrieval cavity.

6. The socket of claim 1, wherein, The outer wall of the retrieval tube body is provided with several magnet mounting holes, and a magnet is fixedly installed in each of the magnet mounting holes.

7. The retrieval tube according to claim 6, characterized in that, The outer wall of the retrieval cylinder body is provided with a fixing groove that mates with all the magnets at the same height. All the magnets at the same height are fixed in their respective magnet mounting holes by snap rings provided in the fixing groove.

8. The socket of any one of claims 1-7, wherein, The outer wall of the retrieval cylinder body is provided with a marking groove.

9. The socket of claim 8, wherein, The inlet structure is a spiral inlet head located at the lower end of the retrieval cylinder body.

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