A self-locking pipe tensile repair device

Abstract

This invention relates to a self-locking pipe tensile repair device, comprising two opposing tensile repair units. Each tensile repair unit includes a repair plate and a repair mechanism, the repair mechanism being mounted on the repair plate for compressing the pipe. The advantages of this invention are its compact structure, reasonable design, and the fact that the self-locking pipe tensile repair device requires no hot work welding, effectively suppressing the development of defects in pipe circumferential welds. It is also convenient to operate, highly reliable, and allows for efficient on-site operations while meeting production quality requirements. Furthermore, it can withstand the axial tensile force of the pipe, and its ability to share the pipe tensile force is far superior to fiber-reinforced composite materials and steel epoxy sleeve repair structures, comparable to type B sleeves, resulting in superior tensile repair performance.

Description

Technical Field

[0001] This invention relates to the field of oil and gas pipeline defect repair technology, specifically to a self-locking pipeline tensile repair device. Background Technology

[0002] With the widespread use of high-grade steel pipelines, defects in circumferential welds have increased significantly. Effectively distributing the axial tensile force of circumferential welds is crucial to suppressing defect development. Fiber-reinforced composite materials and steel epoxy sleeves are non-welding repair methods, offering the advantage of not requiring open-pore welding. However, both rely on the adhesive interface to transfer axial loads, thus only partially distributing the axial force on the pipeline. Type B sleeves are a welding repair method, effectively distributing the axial force on the pipeline, but open-pore welding without interrupting pipeline operation poses construction risks. Furthermore, the preheating and post-weld insulation temperatures for in-service pipelines are difficult to guarantee, severely impacting weld quality. Therefore, there is an urgent engineering need for a repair method that requires no open-pore welding and efficiently distributes the axial tensile force on pipelines. Summary of the Invention

[0003] This invention provides a self-locking pipe tensile repair device, which aims to solve the problems in the prior art.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0005] A self-locking pipeline tensile repair device includes two opposing tensile repair units. Each tensile repair unit includes a repair plate and a repair mechanism. The repair mechanism is installed on the repair plate and is used to compress oil and gas pipelines.

[0006] The beneficial effects of this invention are: during the repair process, two repair plates are welded to the oil and gas pipeline, and the oil and gas pipeline is squeezed by the repair mechanism to increase the tensile strength of the pipeline, avoid the development of defects in the circumferential weld of the oil and gas pipeline, and extend the service life of the pipeline.

[0007] This invention features a compact structure and reasonable design. The self-locking pipe tensile repair device requires no hot welding, effectively suppressing the development of defects in pipe circumferential welds. It is easy to operate, highly reliable, and can perform efficient on-site operations while meeting production quality requirements. In addition, it can withstand the axial tensile force of the pipe, and its ability to share the pipe tensile force is far superior to fiber-reinforced composite materials and steel epoxy sleeve repair structures, comparable to type B sleeves, resulting in better tensile repair performance.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the repair mechanism includes at least one pair of repair components, with two of the repair components in each pair mounted opposite each other on the repair plate along a direction from one end to the other.

[0010] The beneficial effect of adopting the above-mentioned further solution is that during the repair process, the two repair plates are welded to the oil and gas pipeline, and the oil and gas pipeline is squeezed by the repair components to increase the tensile strength of the pipeline, avoid the development of defects in the circumferential weld of the oil and gas pipeline, and extend the service life of the pipeline.

[0011] Furthermore, the repair mechanism includes multiple pairs of repair components, which are evenly spaced on the repair plate along the direction from one side to the other.

[0012] The beneficial effect of adopting the above-mentioned further solutions is that the number of repair components is reasonably designed, further improving the tensile strength of oil and gas pipelines.

[0013] Furthermore, each of the repair components includes a slip and a pusher. A wedge-shaped groove is provided on one side surface of the repair plate. The slip is installed in the wedge-shaped groove, one end of which has a wedge-shaped structure and slides in fit with the wedge-shaped groove, and one side of which extends to the outside of the opening of the wedge-shaped groove and is used to squeeze the oil and gas pipeline. The pusher is installed on the repair plate and is drivenly connected to the slip, and is used to push the slip to move along the direction from one end of the wedge-shaped groove to the other end.

[0014] The beneficial effect of adopting the above-mentioned further solution is that during the repair process, the slip can be moved along the wedge groove by the pusher, so that one side of the slip can squeeze the outer wall of the oil and gas pipeline, thereby increasing the tensile strength of the oil and gas pipeline.

[0015] Furthermore, the surface of one side of the slip has a toothed structure, and multiple teeth on one side of the slip are inclined to the same side.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the toothed structure on one side of the slip can more effectively engage the oil and gas pipeline; in addition, the multiple teeth are inclined along the same side, which can further effectively engage the oil and gas pipeline and further increase the tensile strength of the oil and gas pipeline.

[0017] Furthermore, each of the repair components also includes a fastener mounted on the repair plate and fitting against the other side of the slip to compress the slip.

[0018] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. By further squeezing the slips with fasteners, the slips can more effectively grip the oil and gas pipeline, thereby further increasing the tensile strength of the oil and gas pipeline.

[0019] Furthermore, the pusher includes a positioning element, a spring, at least one guide block, and positioning screws in the same number as the guide blocks. A groove with one open end and the other closed is provided on the other side surface of the slip along its direction of movement, and a wedge-shaped guide groove is also provided on the other side surface of the slip, the guide groove communicating with the groove. The spring is installed in the groove, one end abutting against the closed end of the groove, and the other end extending into the guide groove. Each guide block has a wedge-shaped structure, is installed in the guide groove and slides within the guide groove, and abuts against the other end of the spring. The positioning screw is rotatably mounted on the repair plate, one end extending into the wedge-shaped groove and rotatably connected to the guide block. During rotation, the positioning screw can drive the guide block to move along the guide groove. The positioning element is installed on the repair plate and abuts against the slip, used to position the slip when it stops.

[0020] The beneficial effect of adopting the above-mentioned further solution is that during the repair process, the positioning screw is manually rotated, which drives the guide block to move radially along the oil and gas pipeline. The special structure of the guide block and the groove makes the guide block squeeze the spring, which in turn pushes the slip to move in the wedge groove, thereby making the slip squeeze the oil and gas pipeline.

[0021] Furthermore, the other end of the slip has a wedge-shaped structure, and the positioning element includes at least one inclined screw, each of which is threaded onto the repair plate, with one end abutting against the other end of the slip.

[0022] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The other end of the clamp is tightly pressed by the inclined screw, and the stability of the clamp is ensured by the special structure of the other end of the clamp.

[0023] Furthermore, each of the two repair plates has an arc-shaped plate structure and also includes a sealing component, which is installed between the two repair plates and is in contact with the two repair plates.

[0024] The advantages of adopting the above-mentioned further solution are that the shape design of the repair plate is reasonable and can match the shape of the oil and gas pipeline, while the sealing component is used for sealing treatment to prevent leakage.

[0025] Furthermore, the two repair plates are provided with through-hole mounting grooves on opposite sides, and the two repair plates are also provided with two through-hole sealing grooves on opposite sides, with the two sealing grooves located at the two ends of the corresponding mounting grooves respectively; the sealing assembly includes a sealing ring and two sealing rings, the sealing rings are installed between the two mounting grooves and extend into the two mounting grooves respectively; each sealing ring is installed between the corresponding two sealing grooves and extends into the two sealing grooves.

[0026] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. It effectively seals the gap between the two repair plates and the oil and gas pipeline by using the sealing ring and two sealing rings, thus ensuring the leak-proof effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure during the repair process according to the present invention;

[0028] Figure 2 This is a schematic diagram of the tensile repair unit in this invention;

[0029] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0030] Figure 4 This is a partial structural schematic diagram of the tensile repair unit in this invention;

[0031] Figure 5 This is a front view of the Kava in this invention;

[0032] Figure 6 This is one of the side views of the Kava in this invention;

[0033] Figure 7 This is a second side view of the Kava in this invention;

[0034] Figure 8 This is a cross-sectional view of the kava in this invention.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Oil and gas pipeline; 2. Repair plate; 3. Slip; 4. Spring; 5. Clamping screw; 6. Positioning screw; 7. Angled clamping screw; 8. Positioning pin; 9. Guide block; 10. Sealing ring; 11. Sealing ring; 12. Weld. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] like Figures 1 to 8 As shown, this embodiment provides a self-locking pipeline tensile repair device, including two relatively distributed tensile repair units. Each tensile repair unit includes a repair plate 2 and a repair mechanism. The repair mechanism is installed on the repair plate 2 and is used to compress the oil and gas pipeline 1.

[0043] During the repair process, two oil and gas pipelines 1 are welded together, and two repair plates 2 are welded to the oil and gas pipelines 1 respectively, and the two repair plates 2 cover the welds 12 on the two oil and gas pipelines 1; at the same time, the repair mechanism squeezes the oil and gas pipelines 1 to increase the tensile strength of the pipelines, prevent the development of defects in the circumferential welds of the oil and gas pipelines, and extend the service life of the pipelines.

[0044] Preferably, in this embodiment, each wedge groove is an integral structure with the corresponding repair plate 2, and the wedge angle of the wedge surface is smaller than the friction angle between the slip and the pipe.

[0045] This embodiment features a compact structure and reasonable design. The self-locking pipeline tensile repair device requires no hot welding, effectively suppressing the development of defects in pipeline circumferential welds. It is easy to operate and highly reliable, enabling efficient on-site operations while meeting production quality requirements. Furthermore, it can withstand the axial tensile force of the pipeline, and its ability to share the pipeline tensile force is far superior to fiber-reinforced composite materials and steel epoxy sleeve repair structures, comparable to type B sleeves, resulting in better tensile repair performance.

[0046] Example 2

[0047] Based on Embodiment 1, in this embodiment, the repair mechanism includes at least one pair of repair components, and two of the repair components in each pair are mounted opposite each other on the repair plate 2 along the direction from one end to the other.

[0048] During the repair process, two repair plates 2 are welded to the oil and gas pipeline 1, and the oil and gas pipeline 1 is squeezed by the repair components to increase the tensile strength of the pipeline, prevent the development of defects in the circumferential weld of the oil and gas pipeline, and extend the service life of the pipeline.

[0049] Example 3

[0050] Based on Embodiment 2, in this embodiment, the repair mechanism includes multiple pairs of repair components, which are evenly spaced on the repair plate 2 along the direction from one side to the other.

[0051] The number of repair components is reasonably designed, further improving the tensile strength of oil and gas pipelines.

[0052] Example 4

[0053] Based on any one of Embodiments 2 to 3, in this embodiment, each of the repair components includes a slip 3 and a pusher. A wedge-shaped groove is provided on one side surface of the repair plate 2. The slip 3 is installed in the wedge-shaped groove, one end of which has a wedge-shaped structure and slides in cooperation with the wedge-shaped groove, and one side of which extends to the outside of the groove opening and is used to squeeze the oil and gas pipeline 1. The pusher is installed on the repair plate 2 and is connected to the slip 3 for driving the slip 3 to move along the direction from one end of the wedge-shaped groove to the other end.

[0054] During the repair process, the slip 3 can be moved along the wedge groove by the pusher, so that one side of the slip 3 squeezes the outer wall of the oil and gas pipeline 1, thereby increasing the tensile strength of the oil and gas pipeline 1.

[0055] Preferably, in this embodiment, each of the above-mentioned slips 3 has an arc-shaped block structure that matches the shape of the repair plate 2 and the oil and gas pipeline 1, which can better compress the oil and gas pipeline 1.

[0056] Example 5

[0057] Based on Example 4, in this example, the surface of one side of the card 3 has a toothed structure, and multiple teeth on one side of the card 3 are inclined to the same side.

[0058] The surface of the card 3 is provided with a toothed structure, which can more effectively engage the oil and gas pipeline 1; in addition, multiple teeth are inclined along the same side, which can further effectively engage the oil and gas pipeline 1 and further increase the tensile strength of the oil and gas pipeline 1.

[0059] Based on the above scheme, multiple teeth on one side of each Kava 3 are tilted towards the same side, i.e., attached Figure 3 In this case, angle α is greater than angle β.

[0060] Example 6

[0061] Based on any one of Embodiments 4 to 5, in this embodiment, each of the repair components further includes a fastener, which is installed on the repair plate 2 and fits against the other side of the slip 3 to compress the slip 3.

[0062] The solution has a simple structure and reasonable design. By further compressing the slips 3 with fasteners, the slips 3 can more effectively grip the oil and gas pipeline 1, thereby further increasing the tensile strength of the oil and gas pipeline 1.

[0063] Preferably, in this embodiment, the fastener includes at least one clamping screw 5, each clamping screw 5 being threadedly connected to the corresponding repair plate 2, with one end extending into the corresponding wedge groove and abutting against the corresponding slip 3.

[0064] Preferably, in this embodiment, the fastener includes a plurality of clamping screws 5, which are evenly spaced along the direction from one side to the other of the corresponding repair plate 2.

[0065] In addition, it is preferable that there are two clamping screws 5.

[0066] Example 7

[0067] Based on any one of Embodiments 4 to 6, in this embodiment, the pusher includes a positioning element, a spring 4, at least one guide block 9, and positioning screws 6 in the same number as the guide blocks 9. The other side surface of the slip 3 has a groove with one open end and the other closed along its direction of movement, and a wedge-shaped guide groove is also provided on the other side surface of the slip 3, the guide groove communicating with the groove. The spring 4 is installed in the groove, one end abutting against the closed end of the groove, and the other end extending into the guide groove. Each guide block 9 has a wedge-shaped structure, is installed in the guide groove and slides within the guide groove, and abuts against the other end of the spring 4. The positioning screws 6 are rotatably mounted on the repair plate 2, one end extending into the wedge-shaped groove and rotatably connected to the guide block 9. During rotation, the positioning screws 6 can drive the guide block 9 to move along the guide groove. The positioning element is installed on the repair plate 2 and abuts against the slip 3, used to position the slip 3 when it stops.

[0068] During the repair process, the positioning screw 6 is manually rotated, which drives the guide block 9 to move radially along the oil and gas pipeline 1. The special structure of the guide block 9 and the groove makes the guide block 9 squeeze the spring 4, which in turn causes the spring 4 to push the slip 3 to move in the wedge groove, thereby causing the slip 3 to squeeze the oil and gas pipeline 1.

[0069] Preferably, in this embodiment, the bottom of the guide groove is provided with pyramidal teeth.

[0070] In addition, the opposite side of the guide groove is the slip wedge-shaped surface. The wedge angle of the slip wedge-shaped surface is smaller than the friction angle between the slip and the oil and gas pipeline, so as to achieve self-locking of the slip after assembly.

[0071] Preferably, in this embodiment, the number of the above-mentioned guide blocks 9 is preferably two, and the two guide blocks 9 are installed in the guide groove along the direction of movement of the slip 3.

[0072] Preferably, in this embodiment, each positioning screw 6 is threadedly connected to the corresponding repair plate 2, and one end of it is rotatably connected to the corresponding guide block 9 via a positioning pin 8. The positioning pin 8 connects the guide block 9 and the positioning screw 6, but does not affect the rotation of the positioning screw 6. The specific installation method of each positioning screw 6 is as follows: the guide block 9 has a cavity, and one side of the guide block 9 has a through hole communicating with the cavity. One end of the positioning screw 6 extends through the through hole into the cavity; the positioning pin 8 passes through one end of the positioning screw 6, is located in the cavity, and its length is greater than the space of the through hole. When the positioning screw 6 is turned, the positioning pin 8 can be driven to rotate in the cavity; at the same time, the dimensional relationship between the positioning pin 8 and the through hole makes it impossible for the positioning pin 8 to slip off from the guide block 9, so that the positioning screw 6 can push the guide block 9 to move in the guide groove during rotation and axial movement.

[0073] Based on the above scheme, the three sets of assemblies—the positioning screw smooth rod section, the guide block small diameter circular hole, the guide block dovetail, the slip dovetail groove, and the slip wedge surface, together with the compression spring in the slip dovetail groove—to achieve axial linkage of the slip when it is radially fed into the sleeve.

[0074] Alternatively, the guide groove can also adopt other suitable geometric shapes, such as T-shaped grooves, in which case the shape of the guide block 9 also needs to match the guide groove.

[0075] Example 8

[0076] Based on embodiment 7, in this embodiment, the other end of the slip 3 has a wedge-shaped structure, and the positioning member includes at least one inclined screw 7. Each inclined screw 7 is threaded onto the repair plate 2, and one end of it abuts against the other end of the slip 3.

[0077] The solution has a simple structure and a reasonable design. It uses the inclined screw 7 to press the other end of the slip 3 tightly, and at the same time, it uses the special structure of the other end of the slip 3 to ensure the stability of the slip 3.

[0078] Preferably, in this embodiment, the number of the above-mentioned oblique pressure screws 7 is preferably multiple, for example, two. The two oblique pressure screws 7 are respectively threadedly connected to the corresponding repair plate 2, and one end of them abuts against the other end of the slip 3.

[0079] In addition, the other end of the Kava 3 is set in a wedge shape to prevent the Kava 3 from moving in the opposite direction, further ensuring the stability of the Kava 3's positioning.

[0080] Example 9

[0081] Based on the above embodiments, in this embodiment, the two repair plates 2 are respectively in the form of arc-shaped plates, and a sealing component is also included. The sealing component is installed between the two repair plates 2 and is in contact with the two repair plates 2.

[0082] The repair plate 2 has a reasonable shape design that can match the shape of the oil and gas pipeline 1. At the same time, it uses a sealing component for sealing treatment to prevent leakage.

[0083] Example 10

[0084] Based on Embodiment 9, in this embodiment, the two repair plates 2 are provided with through-hole mounting grooves on opposite sides, and the two repair plates 2 are also provided with two through-hole sealing grooves on opposite sides, with the two sealing grooves located at the two ends of the corresponding mounting grooves respectively; the sealing assembly includes a sealing ring 11 and two sealing rings 10, the sealing ring 11 is installed between the two mounting grooves and extends into the two mounting grooves respectively; each sealing ring 10 is installed between the corresponding two sealing grooves and extends into the two sealing grooves.

[0085] The solution has a simple structure and reasonable design. It uses the sealing ring 11 and two sealing rings 10 to effectively seal the gap between the two repair plates 2 and the oil and gas pipeline 1, ensuring the leak-proof effect.

[0086] Based on the above scheme, the sealing ring 11 is wrapped around the weld 12 on the two oil and gas pipelines 1.

[0087] Preferably, in this embodiment, the cross-section of the sealing ring 11 is trapezoidal and effectively matches the mounting groove on the repair plate 2, resulting in better assembly stability.

[0088] In addition, the two sealing rings 10 have wedge-shaped cross sections and effectively cooperate with the sealing grooves on the two repair plates 2, resulting in better assembly stability.

[0089] Based on the above scheme, the two repair plates 2 can form a complete sleeve to wrap around the two oil and gas pipelines 1.

[0090] In addition, two mounting slots can form an annular groove, and each pair of sealing slots can also form an annular groove.

[0091] Preferably, in this embodiment, the sealing ring 11 is preferably made of epoxy resin.

[0092] In addition, the two sealing rings 10 are preferably made of sealing rubber.

[0093] The working principle of this invention is as follows:

[0094] When repairing the weld defect 12 of the pipeline, first screw the positioning screw 6 into the repair plate 2 to expose the smooth section of the positioning screw. After the smooth section of the positioning screw passes through the small diameter hole of the guide block 9, the positioning pin 8 passes through the pin hole of the smooth section to realize the positioning of the guide block along the axial direction of the positioning screw.

[0095] After the dovetail of the guide block 9 is assembled with the dovetail groove of the slip 3, a spring 4 is installed on the dovetail end face and the dovetail groove end face of the guide block; the compressed spring 4 pushes the slip 3 to move along the guide block 9 toward the wedge surface 13 until the wedge surface of the slip and the wedge surface of the sleeve are pressed into contact.

[0096] Two repair plates 2 are assembled to form a complete sleeve, ensuring that the radial clearance between the inner wall of the sleeve and the oil and gas pipeline 1 is basically uniform.

[0097] Tighten the positioning screw 6, the wedge screw 7, and the clamping screw 5 on the repair plate 2 in sequence. With the coordinated cooperation of the three sets of assemblies—the smooth section of the positioning screw 6, the small diameter hole of the guide block 9, the dovetail of the guide block 9, the dovetail groove of the slip 3, and the wedge surface of the slip 3, and the wedge surface of the repair plate 2—under the action of the compression spring 4 in the dovetail groove of the slip 3, the wedge surface at the end of the slip 3 slides along the wedge surface of the repair plate 2 until the slip teeth 3 press against the outer surface of the pipeline. During the process of the positioning screw 6 being fed into the slip 3, the wedge screw 7 can be tightened appropriately to achieve balanced feeding on both sides of the slip 3. After the slip 3 contacts the surface of the oil and gas pipeline 1, tighten the wedge screw 7 and the clamping screw 5.

[0098] After the locking unit is assembled, tighten the sleeve screws and perform epoxy injection.

[0099] To address the safety concerns associated with welding repairs commonly used in pipeline maintenance, and the insufficient tensile load resistance of pure epoxy resin repair methods, this invention proposes a self-locking pipeline tensile repair device, belonging to the field of oil and gas pipeline defect repair technology. It eliminates the need for open-fire welding and effectively inhibits the development of defects in pipeline circumferential welds. The device is easy to operate, highly reliable, and enables efficient on-site operations while meeting production quality requirements.

[0100] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0101] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-locking pipe tensile repair device, characterized in that: The device includes two opposing tensile repair units, each of which includes a repair plate (2) and a repair mechanism. The repair mechanism is mounted on the repair plate (2) and is used to compress the oil and gas pipeline (1). The repair mechanism includes at least one pair of repair components, with two of the repair components in each pair mounted opposite each other on the repair plate (2) along one end to the other. Each repair component includes a slip (3) and a pusher. A wedge-shaped groove is provided on one side surface of the repair plate (2). The slip (3) The actuator is installed in the wedge groove, one end of which has a wedge-shaped structure and slides in fit with the wedge groove, and one side of which extends to the outside of the wedge groove and is used to compress the oil and gas pipeline (1); the pusher is installed on the repair plate (2), which is connected to the slip (3) for driving the slip (3) to move along the direction from one end of the wedge groove to the other end; the pusher includes a positioning element, a spring (4), at least one guide block (9) and positioning screws (6) in the same number as the guide blocks (9), and the other part of the slip (3) One side surface of the clasp (3) has a groove with one open end and the other closed along its direction of movement, and the other side surface of the clasp (3) also has a wedge-shaped guide groove, which communicates with the groove; the spring (4) is installed in the groove, with one end abutting against the closed end of the groove and the other end extending into the guide groove; each guide block (9) has a wedge-shaped structure, is installed in the guide groove and slides with the guide groove, and abuts against the other end of the spring (4); the positioning screw (6) is rotatably installed in the groove. On the repair plate (2), one end extends into the wedge groove and is rotatably connected to the guide block (9). The positioning screw (6) can drive the guide block (9) to move along the guide groove during rotation. The positioning element is installed on the repair plate (2) and abuts against the slip (3). The other end of the slip (3) has a wedge-shaped structure. The positioning element includes at least one inclined screw (7). Each inclined screw (7) is threaded on the repair plate (2) and one end abuts against the other end of the slip (3).

2. The self-locking pipe tensile repair device according to claim 1, characterized in that: The repair mechanism includes multiple pairs of repair components, which are evenly spaced on the repair plate (2) from one side to the other.

3. The self-locking pipe tensile repair device according to claim 1, characterized in that: The surface of one side of the slip (3) has a toothed structure, and multiple teeth on one side of the slip (3) are inclined to the same side.

4. The self-locking pipe tensile repair device according to claim 1, characterized in that: Each of the repair components also includes a fastener mounted on the repair plate (2) and fitting against the other side of the slip (3) for pressing the slip (3).

5. The self-locking pipe tensile repair device according to any one of claims 1-4, characterized in that: The two repair plates (2) are respectively arc-shaped plate structures and also include a sealing component, which is installed between the two repair plates (2) and fits against the two repair plates (2).

6. The self-locking pipe tensile repair device according to claim 5, characterized in that: The two repair plates (2) are provided with mounting grooves that extend through both sides on opposite sides, and the two repair plates (2) are also provided with two sealing grooves that extend through both sides on opposite sides. The two sealing grooves are located at the two ends of the corresponding mounting grooves respectively. The sealing assembly includes a sealing ring (11) and two sealing rings (10). The sealing ring (11) is installed between the two mounting grooves and extends into the two mounting grooves respectively. Each sealing ring (10) is installed between the two corresponding sealing grooves and extends into the two sealing grooves.

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