Sleeve anti-abrasion joint structure

Abstract

The utility model discloses an anti-abrasion joint structure of a sleeve, which comprises a joint body and an anti-abrasion sleeve, and the middle part of the joint body is fixedly connected with a mounting part; fixing rings are arranged on the two sides of the installation part and fixedly connected with the connector body. The wear-resistant sleeve is rotationally connected to the outer side of the mounting part and located between the fixing rings; a plurality of rolling grooves are formed in the outer side of the mounting part in the circumferential direction, and a mounting groove is formed in the inner side of the fixing ring; rolling columns are arranged in the rolling grooves, and the two sides of the rolling columns are located in the mounting grooves; and the wear-resistant sleeves are positioned outside the rolling columns. And the wear-resistant sleeve can easily rotate when being in contact with the wall of the sleeve, so that the wear of the wear-resistant sleeve is reduced. And meanwhile, abrasion of the wear-resistant sleeve and the mounting part is reduced through rotation of the rolling column, and the service life of the whole connector is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of casing joints, in particular to a casing wear-resistant joint structure. Background Art

[0002] A sleeve joint is a device used to connect two pipes. It usually consists of two sleeves and a connector. A sleeve is a pipe connector with internal or external threads, used to connect pipes. A connector is a device that connects two sleeves together, usually by threading or welding. The sleeve joint plays a role of connection and sealing in the pipeline system, allowing the pipeline to smoothly transfer fluids or gases. It is widely used in the fields of petroleum, chemical industry, natural gas, water supply, drainage, etc.

[0003] In the field of oil drilling, casing drilling technology uses casing to replace drill pipe and becomes the main drilling method. The connection between casings requires the use of casing joints, which are generally larger than the diameter of the casing. Therefore, during drilling operations, the casing joints are prone to friction with the casing wall and produce friction, affecting normal drilling work. At the same time, the long-term friction between the casing joints and the pipe wall will cause the casing joints to wear faster and the joints need to be replaced more frequently.

[0004] A petroleum casing joint is disclosed in the patent with publication number CN113323600A. This joint can fix the annular outer tube to the threaded male joint by completely threading the threaded male joint to the threaded female joint and then using a pushing mechanism to push one end of the connecting clamp block into the connecting clamp groove. However, since this joint needs to be provided with a convex plate for clamping, the overall diameter of the joint is relatively large. When drilling with this joint, the joint is prone to friction with the casing wall. Utility Model Content

[0005] The purpose of the utility model is to provide a casing anti-wear joint structure to solve the following technical problems raised in the background technology:

[0006] The casing joints are prone to rubbing against the pipe wall and generating friction, which affects the normal drilling work.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A casing anti-wear joint structure comprises a joint body and a wear-resistant sleeve, wherein a mounting portion is fixedly connected to the middle of the joint body;

[0009] Fixed rings are arranged on both sides of the mounting portion, and the fixed rings are fixedly connected to the joint body; the wear-resistant sleeve is rotatably connected to the outside of the mounting portion and is located between the fixed rings;

[0010] The outer side of the mounting portion is provided with a plurality of rolling grooves along the circumferential direction, and the inner side of the fixing ring is provided with a mounting groove; a rolling column is provided in the rolling groove, and both sides of the rolling column are located in the mounting groove; and the wear-resistant sleeve is located on the outer side of the rolling column.

[0011] Furthermore, a female connector and a male connector are respectively provided on both sides of the connector body, an external thread is provided on the outer side of the male connector, and an internal thread is provided on the inner side of the female connector.

[0012] Furthermore, a flow channel is arranged on the outer side of the wear-resistant sleeve.

[0013] Furthermore, the flow channel is a spiral structure and is evenly spaced along the circumferential direction on the outer side of the wear-resistant sleeve.

[0014] Furthermore, a hard alloy wear-resistant layer is arranged on the outer side of the wear-resistant sleeve.

[0015] Furthermore, a hard alloy wear-resistant layer is arranged on the outer side of the fixing ring.

[0016] Furthermore, a circle of limiting grooves is arranged on the side of the fixed ring facing the wear-resistant sleeve, and a circle of matching grooves is arranged on both sides of the wear-resistant sleeve; a wear-resistant ring is arranged between the wear-resistant sleeve and the fixed ring, one side of the wear-resistant ring is located in the limiting groove, and the other side is located in the matching groove.

[0017] Furthermore, a smooth transition portion is provided on one side of the fixing ring.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In the utility model, the wear-resistant sleeve can rotate easily when in contact with the casing wall, thereby reducing the wear of the wear-resistant sleeve. At the same time, the rotation of the rolling column reduces the wear of the wear-resistant sleeve and the mounting portion, thereby increasing the service life of the entire joint. The rotation of the wear-resistant sleeve reduces the friction resistance caused by friction, thereby making the rotation of the drill pipe smoother, reducing power consumption and friction heat, and improving drilling efficiency. The movable groove limits the rolling column to ensure the stable rotation of the rolling column. The fixed ring limits the wear-resistant sleeve to ensure the stable rotation of the wear-resistant sleeve. In general, the service life of the entire joint is extended by reducing wear and friction resistance, as well as improving stability. This reduces the frequency of replacement and maintenance, and improves the reliability and economic benefits of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the utility model;

[0021] Figure 2 This is one of the internal structure schematic diagrams of the utility model;

[0022] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0023] Figure 4 This is a schematic diagram of the overall structure of the utility model after the wear-resistant sleeve is removed;

[0024] Figure 5 for Figure 4 A magnified schematic diagram of part B;

[0025] Figure 6 This is the second schematic diagram of the internal structure of the utility model;

[0026] Figure 7 for Figure 6 Enlarged view of part C.

[0027] Markings in the figure: 1-connector body, 2-male connector, 3-transition part, 4-flow channel, 5-wear-resistant sleeve, 6-fixing ring, 7-installation part, 8-rolling column, 9-female connector, 10-matching groove, 11-wear-resistant ring, 12-limiting groove, 13-installation groove, 14-rolling groove. 15-positioning screw, 16-first positioning hole, 17-second positioning hole, 18-second positioning groove, 19-positioning part, 20-first positioning groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example

[0030] A casing anti-wear joint structure, such as Figure 1 As shown, hereinafter referred to as the anti-wear joint, comprises a joint body 1 and a wear-resistant sleeve 5, and a mounting portion 7 is fixedly connected to the middle of the joint body 1;

[0031] like Figure 1 , Figure 2 as well as Figure 4 As shown, fixing rings 6 are provided on both sides of the mounting portion 7, and the fixing rings 6 are fixedly connected to the joint body 1; the wear-resistant sleeve 5 is rotatably connected to the outside of the mounting portion 7 and is located between the fixing rings 6;

[0032] like Figures 2 to 5 As shown, a plurality of rolling grooves 14 are circumferentially arranged on the outer side of the mounting portion 7, and a mounting groove 13 is arranged on the inner side of the fixing ring 6; a rolling column 8 is arranged in the rolling groove 14, and both sides of the rolling column 8 are located in the mounting groove 13; and the wear-resistant sleeve 5 is located on the outer side of the rolling column 8.

[0033] Specifically, when the casing wear-resistant joint structure of the utility model is used, during normal drilling, the wear-resistant joint is connected between the rotating rods. Since the outer diameter of the wear-resistant joint is larger than the outer diameter of the drill rod, the wear-resistant joint is more likely to contact the pipe wall of the casing during the rotation of the drill rod. The outer side of the wear-resistant joint is a wear-resistant sleeve 5. At the same time, the wear-resistant sleeve 5 is rotatably connected to the outer side of the mounting portion 7 of the wear-resistant sleeve 5, and a plurality of rolling columns 8 are also arranged between the wear-resistant sleeve 5 and the mounting portion 7. The contact between the wear-resistant joint and the pipe wall of the casing is the contact between the wear-resistant sleeve 5 and the pipe wall of the casing. Since the wear-resistant sleeve 5 is in contact with the pipe wall of the casing. The wear-resistant sleeve 5 can be easily rotated, thereby reducing the wear of the wear-resistant sleeve 5 and the friction resistance caused by friction. During the rotation of the wear-resistant sleeve 5, the rolling column 8 between the wear-resistant sleeve 5 and the mounting portion 7 will also rotate, reducing the wear of the wear-resistant sleeve 5 and the mounting portion 7, and increasing the service life of the wear-resistant joint. The rolling groove 14 can limit the rolling column 8 to ensure the stable rotation of the rolling column 8. The fixing rings 6 on both sides can limit the wear-resistant sleeve 5, ensuring the stable rotation of the wear-resistant sleeve 5. The mounting groove 13 on the fixing ring 6 is used to limit the rolling column 8, reducing the axial movement of the rolling column 8, that is, reducing the wear of the rolling column 8, and improving the service life of the entire anti-wear joint.

[0034] In a preferred embodiment, Figure 1 , Figure 2 as well as Figure 4 As shown, a female connector 9 and a male connector 2 are respectively provided on both sides of the connector body, an external thread is provided on the outer side of the male connector 2, and an internal thread is provided on the inner side of the female connector 9. Specifically, the anti-wear connector is connected to the drill pipe through the female connector 9 and the male connector 2. The external thread and the internal thread are provided to facilitate quick connection and ensure stability after connection.

[0035] In a preferred embodiment, Figure 1 or Figure 4 As shown, the flow channel 4 is arranged on the outside of the wear-resistant sleeve 5. Further optimization, the flow channel 4 is a spiral structure and is evenly spaced along the circumferential direction on the outside of the wear-resistant sleeve 5. The design of the flow channel 4 is used to ensure the need for chip removal. The design of setting the flow channel 4 on the outside of the wear-resistant sleeve 5 can effectively guide and accelerate the flow of chips and debris in the annulus. The flow channel 4 is designed as a spiral structure, so that a vortex effect can be generated when the fluid passes through, further improving the discharge efficiency of chips and debris. At the same time, the flow channel 4 is evenly spaced along the circumferential direction, ensuring that the entire surface of the wear-resistant sleeve 5 can be evenly flushed and cleaned.

[0036] In a preferred embodiment, a hard alloy wear-resistant layer is disposed on the outer side of the wear-resistant sleeve 5. The hard alloy wear-resistant layer here can be made of tungsten-titanium carbide. This hard alloy material has excellent wear resistance and corrosion resistance, and can effectively protect the surface of the wear-resistant sleeve 5, thereby improving the service life.

[0037] In a preferred embodiment, a hard alloy wear-resistant layer is provided on the outer side of the fixing ring 6. Because the fixing ring 6 is also located at the outermost side of the wear-resistant joint, it is inevitable that friction will occur with the pipe wall of the casing, so a wear-resistant layer is required. Similarly, the hard alloy wear-resistant layer here can be made of tungsten titanium carbide. This hard alloy material has excellent wear resistance and corrosion resistance, and can effectively protect the surface of the fixing ring 6, thereby improving the service life.

[0038] In a preferred embodiment, if Figure 3 As shown, a circle of limiting grooves 12 is provided on the side of the fixed ring 6 facing the wear-resistant sleeve 5, and a circle of matching grooves 10 are provided on both sides of the wear-resistant sleeve 5; a wear-resistant ring 11 is provided between the wear-resistant sleeve 5 and the fixed ring 6, and one side of the wear-resistant ring 11 is located in the limiting groove 12, and the other side is located in the matching groove 10. Through such a design structure, a tightly matched assembly system is formed between the fixed ring 6, the wear-resistant sleeve 5 and the wear-resistant ring 11. This assembly system can ensure the stability and reliability of the wear-resistant sleeve 5 during operation, and provides good sealing performance and wear resistance, thereby improving the service life and performance of the wear-resistant joint. In this embodiment, the fixed ring 6 can be made of polytetrafluoroethylene material.

[0039] In a preferred embodiment, if Figure 1 , Figure 2 as well as Figure 4 As shown, a smooth transition portion 3 is provided on one side of the fixing ring 6. The design of this transition portion 3 is intended to guide the flow of debris and reduce the impact and wear of the debris on the fixing ring 6. The transition portion 3 adopts a smooth curve shape, so that the debris can smoothly change the flow direction when passing through the transition portion 3, reducing the impact force and friction force of the debris on the fixing ring 6. The fixing ring 6 can better cope with the impact and wear of the debris, and extend the service life of the fixing ring 6.

[0040] In a preferred embodiment, if Figure 6As shown, the fixing rings 6 on both sides are threadedly connected to the joint body 1, and a first positioning hole 16 is provided on the fixing ring 6, and a plurality of second positioning holes 17 are provided circumferentially on the joint body 1. After the fixing ring 6 is threadedly connected to the joint body 1 and connected in place, the positioning screw 15 is screwed into the first positioning hole 16, and one end of the positioning screw 15 passes through the first positioning hole 16 and enters the second positioning hole 17. The fixing ring 6 is prevented from loosening by the positioning screw 15. The fixing ring 6 is threadedly connected to the joint body 1 to facilitate the installation of the wear-resistant sleeve 5. Further optimized, a circle of first positioning grooves 20 are provided in the wear-resistant sleeve 5, a circle of second positioning grooves 18 are provided on the joint body 1, and a circle of positioning parts 19 are provided on the outer side of the rolling column 8. One side of the positioning part 19 is located in the first positioning groove 20, and the other side is located in the second positioning groove 18. Through this design, the rolling column 8 and the wear-resistant sleeve 5 can be limited to prevent the rolling column 8 and the wear-resistant sleeve 5 from moving in the axial direction.

[0041] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A casing anti-wear joint structure, characterized in that: It comprises a joint body (1) and a wear-resistant sleeve (5), wherein a mounting portion (7) is fixedly connected to the middle of the joint body (1); Fixed rings (6) are provided on both sides of the mounting portion (7), and the fixed rings (6) are fixedly connected to the joint body (1); the wear-resistant sleeve (5) is rotatably connected to the outside of the mounting portion (7) and is located between the fixed rings (6); The outer side of the mounting portion (7) is provided with a plurality of rolling grooves (14) along the circumferential direction, and the inner side of the fixing ring (6) is provided with a mounting groove (13); a rolling column (8) is provided in the rolling groove (14), and two sides of the rolling column (8) are located in the mounting groove (13); and the wear-resistant sleeve (5) is located on the outer side of the rolling column (8).

2. The casing anti-wear joint structure according to claim 1, characterized in that: A female connector (9) and a male connector (2) are respectively arranged on both sides of the connector body; an external thread is arranged on the outer side of the male connector (2) and an internal thread is arranged on the inner side of the female connector (9).

3. The casing anti-wear joint structure according to claim 1, characterized in that: A flow channel (4) is arranged on the outer side of the wear-resistant sleeve (5).

4. The casing anti-wear joint structure according to claim 3, characterized in that: The flow channels (4) are of a spiral structure and are evenly spaced apart along the circumferential direction on the outer side of the wear-resistant sleeve (5).

5. The casing anti-wear joint structure according to claim 1, characterized in that: A hard alloy wear-resistant layer is arranged on the outer side of the wear-resistant sleeve (5).

6. The casing anti-wear joint structure according to claim 1, characterized in that: A hard alloy wear-resistant layer is arranged on the outer side of the fixing ring (6).

7. The casing anti-wear joint structure according to claim 1, characterized in that: A circle of limiting grooves (12) is arranged on the side of the fixed ring (6) facing the wear-resistant sleeve (5), and a circle of matching grooves (10) are arranged on both sides of the wear-resistant sleeve (5); a wear-resistant ring (11) is arranged between the wear-resistant sleeve (5) and the fixed ring (6), and one side of the wear-resistant ring (11) is located in the limiting groove (12), and the other side is located in the matching groove (10).

8. The casing anti-wear joint structure according to claim 1, characterized in that: A smooth transition portion (3) is provided on one side of the fixing ring (6).

Images