Fire-free plugging device and process for perforation failure of oil and gas gathering and transportation pipeline

Abstract

The invention relates to the technical field of pipeline plugging, in particular to a fire-free plugging device and process for perforation failure of an oil and gas gathering and transportation pipeline. The fire-free plugging device for the oil and gas gathering and transportation pipeline perforation failure comprises a sealing gasket, a pressing plate and a pressing adjusting assembly, the sealing gasket is used for being laid on the surface of a leakage point of the oil and gas gathering and transportation pipeline, the pressing plate is arranged on the outer surface of the sealing gasket, and the pressing adjusting assembly is installed on the pressing plate and connected with the oil and gas gathering and transportation pipeline. The pressing adjusting assembly is used for adjusting the pressure, acting on the sealing gasket, of the pressing plate so that the sealing gasket can be tightly pressed at the leakage point in a sealed mode. The leak stopping clamp has the advantages that the design is reasonable, fire welding is not needed, a conveying medium in the pipeline does not need to be replaced, and compared with an existing leak stopping clamp, the leak stopping clamp is lighter in mass and more convenient to operate under the same pressure bearing capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline plugging, and particularly relates to a non - fire plugging device and process for perforation failure of oil and gas gathering and transportation pipelines. Background Art

[0002] In recent years, failures of the oil and gas gathering and transportation pipeline body and girth welds under complex terrains have exposed major safety hazards in gathering and transportation pipelines under special topographical and geological conditions. There are a large number of technical pipelines in domestic oil and gas fields located in large - undulation terrains and landforms. Therefore, there are a large number of gathering and transportation pipelines in crossing sections and subsidence areas. Such pipelines are difficult to access, resulting in difficult emergency repair operations and inability to perform emergency repairs in a timely manner, thus leading to the escalation and expansion of leakage situations. For pipeline leakage failures, production is currently mainly restored through the following two methods: One is pipe replacement, which usually requires pipeline shutdown, production suspension, and replacement of the medium inside the pipeline. After cutting the failed part and welding a section of intact pipeline, production is restored after passing the inspection. The overall cost is relatively high. The other is plugging the failed part. The main methods include repair welding, clamping, and plugging devices, etc. It is not necessary to replace the conveying medium inside the pipeline, but it is necessary to depressurize the pipeline until it stops transporting according to different plugging methods, and the overall cost is relatively low.

[0003] Among the above - mentioned repair technologies for pipeline leakage failures, both pipe replacement and repair welding require hot - work welding. Since the transported oil and gas media are flammable and explosive, there are certain risks, and it requires a large amount of manpower, material resources, and a long time. Currently, there are also clamps or plugging devices for the plugging part, such as steel - belt tightening, pipeline repairers, pipeline connection repairers, strong - magnetic plugging, plugging tapes, etc. However, different plugging technologies have their own limitations.

[0004] Steel - belt tightening technology: Applicable to temporary plugging of media such as water, natural gas, and oil in pipelines within the temperature range of - 30°C to 120°C and pressure range of ≤1.6 MPa. However, it mainly has problems such as low applicable pressure, difficult operation and installation, requiring multiple people to cooperate, and poor sealing performance.

[0005] Pipeline repairer: Applicable to plugging of media such as water, natural gas, and oil in pipelines within the temperature range of - 30°C to 120°C and pressure range of ≤4.0 MPa. However, it mainly has problems such as limited opening angle, difficult centering, high roundness requirements, difficult fastening to grasp, and poor sealing performance.

[0006] Pipeline connection repairer: Applicable to plugging of media such as water, natural gas, and oil in pipelines within the temperature range of - 30°C to 120°C and pressure range of ≤6.4 MPa. It mainly has problems such as large mass, requiring hoisting machinery for installation, high roundness requirements, and requiring multiple people to cooperate to complete.

[0007] Strong magnetic leak plugging: applicable to the temperature range of -30°C to 120°C, the pressure range of ≤2.0 MPa, and temporary leak plugging of media such as pipe-transported water, natural gas, and oil. However, it mainly has problems such as low pressure resistance, the need for grinding, poor sealing performance, and the need for multi-person cooperation.

[0008] Leak plugging tape: applicable to the temperature range of -30°C to 120°C, the pressure range of ≤8.0 MPa, and temporary leak plugging of media such as pipe-transported water, natural gas, and oil. However, it mainly has problems such as difficult fastening and high cost, resulting in its inability to be widely used in gathering and transportation pipelines.

[0009] Based on this, there is a need to develop a lightweight leak plugging technology that is easy to operate, has strong pressure-bearing capacity, can achieve leak plugging without stopping the pipeline, without replacement, and without hot work after the perforation failure of oil and gas gathering and transportation pipelines, and can significantly improve the leak plugging efficiency and reliability of pipelines that are difficult to access, such as crossing sections. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide a device and process for leak plugging without hot work for perforation failure of oil and gas gathering and transportation pipelines, effectively overcoming the defects of the prior art.

[0011] The technical solution of the present invention to solve the above technical problems is as follows:

[0012] A device for leak plugging without hot work for perforation failure of oil and gas gathering and transportation pipelines includes a sealing gasket, a pressing plate, and a pressing adjustment assembly. The above-mentioned sealing gasket is used to be laid on the surface of the leak point of the oil and gas gathering and transportation pipeline. The above-mentioned pressing plate is arranged on the outer surface of the above-mentioned sealing gasket. The above-mentioned pressing adjustment assembly is installed on the above-mentioned pressing plate and is connected to the oil and gas gathering and transportation pipeline. The above-mentioned pressing adjustment assembly is used to adjust the pressure of the above-mentioned pressing plate acting on the above-mentioned sealing gasket, so that the above-mentioned sealing gasket is sealed and pressed at the above-mentioned leak point.

[0013] On the basis of the above technical solution, the present invention can also be improved as follows.

[0014] Further, one side of the above-mentioned pressing plate is provided with a groove adapted to the above-mentioned sealing gasket. The above-mentioned sealing gasket is partially embedded in the above-mentioned groove, and the above-mentioned pressing adjustment assembly is installed on the other side of the above-mentioned pressing plate.

[0015] Further, the above-mentioned pressing adjustment assembly includes a movable plate, a displacement adjustment mechanism, and at least one tightening rope. The above-mentioned displacement adjustment mechanism is installed on the other side of the above-mentioned pressing plate. The above-mentioned movable plate is connected to the above-mentioned displacement adjustment mechanism. The above-mentioned tightening rope surrounds the above-mentioned oil and gas gathering and transportation pipeline, and its two ends are respectively connected to the two ends of the above-mentioned movable plate. The above-mentioned displacement adjustment mechanism is used to adjust the movement of the above-mentioned movable plate closer to or away from the above-mentioned pressing plate, thereby adjusting the tension of the above-mentioned tightening rope and realizing the adjustment of the pressure of the above-mentioned pressing plate acting on the above-mentioned sealing gasket.

[0016] Furthermore, the displacement adjustment mechanism includes a screw and a handle. The screw is vertically arranged on the other side of the pressure plate. One end of the screw is rotatably connected to the pressure plate. The handle is mounted on the other end of the screw. A through hole is provided in the middle of the movable plate. A nut seat is fixed in the through hole. The nut seat is screwed onto the screw.

[0017] Furthermore, the other end of the screw rod is provided with a through hole vertically passing through it, and the handle is a long straight rod and passes through the through hole.

[0018] Furthermore, the clamping and adjusting assembly further comprises a guide rod, which is vertically fixed to the other side of the pressure plate and passes through a matching guide hole on the movable plate.

[0019] Furthermore, pins for fixing the ends of the tightening ropes are respectively provided at both ends of the movable plate.

[0020] Furthermore, two tightening ropes are provided, and the two ends of the side ends of the movable plate are provided with the pin shafts respectively, and the two ends of the two tightening ropes are detachably connected to the two pin shafts on both sides of the movable plate respectively.

[0021] Furthermore, the pressure plate is vertically provided with a plurality of bolts penetrating therethrough and screwed therewith, and the bolts abut against the sealing gasket after passing through the pressure plate.

[0022] The beneficial effects are: reasonable design, no need for hot welding, no need to replace the conveying medium in the pipeline, and compared with the existing plugging clamps, under the same pressure bearing capacity, it is lighter and more convenient to operate.

[0023] A non-fire plugging process for perforation failure of oil and gas gathering and transportation pipelines is also provided, comprising the following steps:

[0024] S1. Select the appropriate length of the tightening rope, the appropriate size of the sealing gasket and the pressure plate, and install them at the leaking point of the oil and gas gathering and transportation pipeline;

[0025] S2. Wrap the tightening rope around the oil and gas gathering and transportation pipeline and connect it to the two ends of the movable plate, ensure that the tightening rope passes around the pipeline and there is no twisting, and adjust the chain length;

[0026] S3. Adjust the angle of the entire plugging device so that the sealing gasket and the pressure plate are in a straight line with the leaking point, and fine-tune the entire device along the axial direction of the pipeline so that the center of the sealing gasket and the pressure plate is aligned with the center of the leaking point;

[0027] S4, operate the displacement adjustment mechanism to increase the distance between the movable plate and the pressure plate to achieve the pressurized tightening operation;

[0028] S5. Detect the leakage point plugging situation. If there is no leakage or seepage around the leakage point, the pipeline pressure can be gradually increased to the normal operating pressure; if there is leakage or seepage around the leakage point, adjust the bolts according to the leakage or seepage part, and complete the plugging by adjusting the pressing degree of the gasket on the pipeline; if leakage or seepage occurs during the pressure increase process, adjust the bolts to complete the plugging.

[0029] The beneficial effects are: simple and fast process, and effective on-line plugging without hot work can be achieved. Brief Description of the Drawings

[0030] Figure 1 It is a structural schematic diagram of the device for plugging perforation failure of oil and gas gathering and transportation pipeline without hot work of the present invention;

[0031] Figure 2 It is a structural schematic diagram of another embodiment of the device for plugging perforation failure of oil and gas gathering and transportation pipeline without hot work of the present invention.

[0032] In the drawings, the list of components represented by each reference numeral is as follows:

[0033] 1. Gasket; 2. Pressing plate; 3. Pressing adjustment component; 4. Oil and gas gathering and transportation pipeline; 21. Bolt; 31. Movable plate; 32. Displacement adjustment mechanism; 33. Tightening rope; 34. Guide rod; 41. Leakage point; 311. Pin shaft; 321. Screw rod; 322. Handle. Detailed Embodiment

[0034] The principle and characteristics of the present invention will be described below with reference to the drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0035] Embodiment: As Figure 1 shown, the device for plugging perforation failure of oil and gas gathering and transportation pipeline without hot work in this embodiment includes a gasket 1, a pressing plate 2 and a pressing adjustment component 3. The above-mentioned gasket 1 is used to be laid on the surface of the leakage point 41 of the oil and gas gathering and transportation pipeline 4. The above-mentioned pressing plate 2 is arranged on the outer surface of the above-mentioned gasket 1. The above-mentioned pressing adjustment component 3 is installed on the above-mentioned pressing plate 2 and is connected to the oil and gas gathering and transportation pipeline 4. The above-mentioned pressing adjustment component 3 is used to adjust the pressure of the above-mentioned pressing plate 2 acting on the above-mentioned gasket 1, so that the above-mentioned gasket 1 is tightly sealed at the above-mentioned leakage point 41.

[0036] The process of using for plugging is as follows:

[0037] Lay the gasket 1 on the surface of the leak point 41 of the oil and gas gathering and transportation pipeline 4, install the pressure plate 2, connect the compression adjustment component 3 with the oil and gas gathering and transportation pipeline 4. Next, adjust the pressure exerted by the pressure plate 2 on the gasket 1 by operating the compression adjustment component 3, so that the gasket 1 effectively plugs and seals the leak point 41. The structure is reasonably designed, without the need for hot welding and without replacing the conveying medium in the pipeline. Compared with the existing leak plugging fixtures, it is lighter in weight and more convenient to operate under the same pressure-bearing capacity.

[0038] As a preferred embodiment, a groove adapted to the gasket 1 is provided on one side of the pressure plate 2, a part of the gasket 1 is embedded in the groove, and the compression adjustment component 3 is installed on the other side of the pressure plate 2.

[0039] In the above embodiment, the design of the groove facilitates the relative position between the gasket 1 and the pressure plate 2 to be maintained, and prevents the gasket 1 from shifting relative to the pressure plate 2.

[0040] As a preferred embodiment, the compression adjustment component 3 includes a movable plate 31, a displacement adjustment mechanism 32 and at least one tightening rope 33. The displacement adjustment mechanism 32 is installed on the other side of the pressure plate 2. The movable plate 31 is connected to the displacement adjustment mechanism 32. The tightening rope 33 surrounds the oil and gas gathering and transportation pipeline 4, and its two ends are respectively connected to the two ends of the movable plate 31. The displacement adjustment mechanism 32 is used to adjust the movement of the movable plate 31 closer to or farther away from the pressure plate 2, so as to adjust the tension of the tightening rope 33, and realize the adjustment of the pressure exerted by the pressure plate 2 on the gasket 1.

[0041] In the above embodiment, during operation, the distance between the movable plate 31 and the pressure plate 2 is adjusted through the displacement adjustment mechanism 32, so as to adjust the tension (pulling force) of the tightening rope 33 tightly surrounding the surface of the oil and gas gathering and transportation pipeline 4. The reaction force of this force will act on the displacement adjustment mechanism 32, forming a pressure on the pressure plate 2 and acting on the gasket 1, realizing the pressing and leak plugging of the gasket 1 at the leak point 41.

[0042] As a preferred embodiment, the displacement adjustment mechanism 32 includes a screw 321 and a handle 322. The screw 321 is vertically arranged on the other side of the pressure plate 2. One end of the screw 321 is rotatably connected to the pressure plate 2. The handle 322 is installed at the other end of the screw 321. A perforation is provided in the middle of the movable plate 31, and a nut seat is fixed in the perforation. The nut seat is screwed onto the screw 321.

[0043] In the above-described embodiments, the operating handle 322 drives the screw 321 to rotate, thereby increasing the distance between the movable plate 31 and the pressing plate 2, causing the tightening rope 33 to be tensioned. This tension force will exert a pressure on the sealing gasket 1 by the screw 321 and the pressing plate 2, causing the sealing gasket 1 to press and plug the leakage point 41.

[0044] In this embodiment, a through hole vertically penetrating the other end of the screw 321 is provided, and the handle 322 is a long straight rod and passes through the through hole. When in use, the handle 322 passes through the through hole to drive the screw 321 to rotate. When not in use, the handle 322 can be pulled out.

[0045] As a preferred embodiment, as Figure 2 shown, the pressing adjustment assembly 3 further includes a guide rod 34. The guide rod 34 is vertically fixed to the other side of the pressing plate 2 and passes through a matching guide hole on the movable plate 31.

[0046] In the above-described embodiments, the setting of the guide rod 34 enables the movable plate 31 not to twist during the rotation of the screw 321, but only to move in the direction of the long axis of the guide rod 34 and the screw 321 to adjust the distance from the pressing plate 2.

[0047] In this embodiment, pins 311 for fixing the ends of the tightening rope 33 are respectively provided at both ends of the movable plate 31. The two ends of the tightening rope 33 can be detachably connected to the corresponding pins 311.

[0048] In this embodiment, the tightening rope 33 can be a chain, a steel wire rope, etc.

[0049] In this embodiment, two tightening ropes 33 are provided. Pins 311 are respectively provided at both ends of the two side ends of the movable plate 31. The two ends of the two tightening ropes 33 are respectively detachably connected to the two pins 311 on both sides of the movable plate 31. The two tightening ropes 33 are respectively connected to both sides of the movable plate 31 and are distributed in parallel at intervals, so that the movable plate 31 is stressed more evenly, and the whole device will not be skewed when the screw 321 is rotated.

[0050] As a preferred embodiment, a plurality of bolts 21 vertically penetrating and screwed with the pressing plate 2 are provided on the pressing plate 2. After passing through the pressing plate 2, the bolts 21 abut against the sealing gasket 1.

[0051] In the above-described embodiments, the design of the bolts 21 can realize fine adjustment of pressing the sealing gasket 1 at the leakage point 41. Specifically, when the distance between the movable plate 31 and the pressing plate 2 increases, if leakage or seepage still occurs at the leakage point 41, by screwing the bolts 21, the bolts 21 press the sealing gasket 1 tightly against the pipe surface to achieve leakage plugging.

[0052] In this embodiment, a plurality of bolts 21 are provided at intervals around the operating screw 321 on the pressing plate 2.

[0053] More specifically, the non - hot - work plugging process for perforation failure of oil - gas gathering and transportation pipelines includes the following steps:

[0054] S1. Select a hoop - tightening rope 33 with a suitable length, a gasket 1 with a suitable size, and a pressing plate 2, and install them at the leakage point 41 of the oil - gas gathering and transportation pipeline 4.

[0055] S2. Connect the two ends of the movable plate 31 after surrounding the oil - gas gathering and transportation pipeline 4 with the hoop - tightening rope 33, ensure that the hoop - tightening rope 33 bypasses the pipeline without torsion, and adjust the length of the chain.

[0056] S3. Adjust the angle of the entire plugging device so that the gasket 1 and the pressing plate 2 are in a straight line with the leakage point 41, and finely adjust the entire device along the axial direction of the pipeline so that the centers of the gasket 1 and the pressing plate 2 are directly opposite the center of the leakage point 41.

[0057] S4. Operate the displacement adjustment mechanism 32 to increase the distance between the movable plate 31 and the pressing plate 2, and achieve the pressurized tightening operation.

[0058] S5. Detect the plugging condition of the leakage point 41. If there is no leakage or seepage around the leakage point 41, the pipeline pressure can be gradually increased to the normal operating pressure. If there is leakage or seepage around the leakage point 41, adjust (tighten) the bolts 21, and complete the plugging by adjusting the pressing degree of the gasket 1 on the pipeline. If leakage or seepage occurs during the pressure - increasing process, adjust (tighten) the bolts 21 to complete the plugging.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counter - clockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "connected to", "fixed" and the like shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0063] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A non - hot - work plugging device for perforation failure of oil and gas gathering and transportation pipelines, characterized in that: It includes a gasket (1), a pressing plate (2) and a pressing adjustment assembly (3). The gasket (1) is used to be laid on the surface of the leakage point (41) of the oil and gas gathering and transportation pipeline (4). The pressing plate (2) is arranged on the outer surface of the gasket (1). The pressing adjustment assembly (3) is installed on the pressing plate (2) and connected to the oil and gas gathering and transportation pipeline (4). The pressing adjustment assembly (3) is used to adjust the pressure exerted by the pressing plate (2) on the gasket (1) so that the gasket (1) is tightly sealed at the leakage point (41).

2. The plugging device for perforation failure of oil and gas gathering and transportation pipelines without hot work according to claim 1, wherein: One side of the pressing plate (2) is provided with a groove adapted to the gasket (1), and a part of the gasket (1) is embedded in the groove. The pressing adjustment assembly (3) is installed on the other side of the pressing plate (2).

3. The plugging device for perforation failure of oil and gas gathering and transportation pipelines without hot work according to claim 2, characterized in that: The pressing adjustment assembly (3) includes a movable plate (31), a displacement adjustment mechanism (32) and at least one tightening rope (33). The displacement adjustment mechanism (32) is installed on the other side of the pressing plate (2). The movable plate (31) is connected to the displacement adjustment mechanism (32). The tightening rope (33) surrounds the oil and gas gathering and transportation pipeline (4), and its two ends are respectively connected to the two ends of the movable plate (31). The displacement adjustment mechanism (32) is used to adjust the movement of the movable plate (31) to approach or move away from the pressing plate (2), thereby adjusting the tension of the tightening rope (33) and realizing the adjustment of the pressure exerted by the pressing plate (2) on the gasket (1).

4. The plugging device for perforation failure of oil and gas gathering and transportation pipelines without hot work according to claim 3, characterized in that: The displacement adjustment mechanism (32) includes a screw rod (321) and a handle (322). The screw rod (321) is vertically arranged with the other side of the pressing plate (2). One end of the screw rod (321) is rotatably connected to the pressing plate (2). The handle (322) is installed at the other end of the screw rod (321). A through hole is provided in the middle of the movable plate (31), and a nut seat is fixed in the through hole. The nut seat is screwed on the screw rod (321).

5. A non - hot - work plugging device for perforation failure of oil and gas gathering and transportation pipelines according to claim 4, characterized in that: A through hole vertically penetrating it is provided at the other end of the screw rod (321), and the handle (322) is a long straight rod and passes through the through hole.

6. The plugging device for perforation failure of oil and gas gathering and transportation pipelines without hot work according to claim 4, characterized in that: The pressing adjustment assembly (3) further includes a guide rod (34). The guide rod (34) is vertically fixed on the other side of the pressing plate (2) and passes through a matching guide hole on the movable plate (31).

7. The plugging device for perforation failure of oil and gas gathering and transportation pipelines without hot work according to claim 3, characterized in that: Pin shafts (311) for fixing the ends of the tightening rope (33) are respectively provided at both ends of the movable plate (31).

8. A non - fire plugging device for perforation failure of oil and gas gathering and transportation pipelines according to claim 7, characterized in that: There are two tightening ropes (33). Pin shafts (311) are respectively provided at both ends of both side ends of the movable plate (31). The two ends of the two tightening ropes (33) are respectively detachably connected to the two pin shafts (311) on both sides of the movable plate (31).

9. A plugging device for perforation failure of oil and gas gathering and transportation pipelines without hot work according to any one of claims 3 to 8, characterized in that: A plurality of bolts (21) vertically passing through and screwed with the pressing plate (2) are provided on the pressing plate (2). After passing through the pressing plate (2), the bolts (21) abut against the gasket (1).

10. A non - hot - work plugging process for perforation failure of oil - gas gathering and transportation pipelines, which is implemented by using the non - hot - work plugging device for perforation failure of oil - gas gathering and transportation pipelines as described in claim 9, is characterized in that, It includes the following steps: S1. Select a tightening rope (33) with a suitable length, a gasket (1) and a pressing plate (2) with suitable sizes, and install them at the leakage point (41) of the oil and gas gathering and transportation pipeline (4). S2. After surrounding the oil and gas gathering and transportation pipeline (4) with the tightening rope (33), connect it to both ends of the movable plate (1), ensure that the tightening rope (33) bypasses the pipeline without torsion, and adjust the length of the chain; S3. Adjust the angle of the entire leak plugging device so that the gasket (1) and the pressing plate (2) are in a straight line with the leak point (41), and finely adjust the entire device along the axial direction of the pipeline so that the centers of the gasket (1) and the pressing plate (2) are directly opposite the center of the leak point (41); S4. Operate the displacement adjustment mechanism (32) to increase the distance between the movable plate (31) and the pressing plate (2) to achieve the pressurized tightening operation; S5. Detect the leak plugging situation of the leak point (41). If there is no leakage or seepage around the leak point (41), the pipeline pressure can be gradually increased to the normal operating pressure; if there is leakage or seepage around the leak point (41), adjust the bolt (21) according to the leakage or seepage location, and complete the leak plugging by adjusting the pressing degree of the gasket (1) on the pipeline; if leakage or seepage occurs during the pressure increase process, adjust the bolt (21) to complete the leak plugging.

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