Leakage-proof device for oil exploitation pipeline

Abstract

The utility model discloses an oil exploitation pipeline leakproof device which comprises two clamps, a lockable telescopic assembly is arranged between the two clamps, and an extensible sealing assembly is arranged between the telescopic assembly and plays a role in blocking gaps of different sizes. The sealing assembly is formed by connecting a plurality of sealing units arranged along the surface of the pipeline, the extensible sealing assembly is assembled through a plurality of supporting assemblies, and the sealing assembly with the appropriate area is assembled according to gaps of different sizes. Then clamping force in the axis direction of the pipeline is provided through the telescopic assembly, sealing is kept between the multiple supporting assemblies, meanwhile, the hoop is attached to the surface of the pipeline gap, and the gap in the pipeline is blocked, so that the problems that an existing repairing block is inconvenient to extend or shrink and is difficult to properly adjust according to the size of the gap, and the using effect is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum pipeline leak protection technical field, concretely is a kind of petroleum exploitation pipeline leak protection device. BACKGROUND

[0002] After oil exploitation, oil is usually transported by using oil pipeline, oil delivery station and other auxiliary related equipment, and due to the long-time use of pipeline, cracks can be caused in the pipeline due to external factors, and oil leakage can occur, so a leak protection device is needed to temporarily block the cracks to facilitate subsequent workers to further reinforce the blocking position or replace the pipeline.

[0003] A kind of petroleum exploitation pipeline leak protection device is disclosed in Chinese utility model patent with publication No.CN22408155U, by being set on the pipe ring, and being used by support, threaded rod and repair block on the side of ring, by threaded rod, repair block is extruded on the surface of pipe, and the rupture of oil pipeline is blocked;But the size of the crack of oil pipeline rupture is difficult to control, and the ductility of repair block is not good, and the repair block of too large size is easy to cause waste to the smaller crack, and the repair block is too small to completely close the larger crack, resulting in poor use effect. UTILITY MODEL CONTENT

[0004] The utility model aims at making up for the deficiency of prior art, and provides a kind of petroleum exploitation pipeline leak protection device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of petroleum exploitation pipeline leak protection device, including two clamps, lockable telescopic assembly is arranged between two clamps, and extendable sealing assembly is arranged between telescopic assembly, and the effect of blocking different size cracks is played;

[0007] The sealing assembly is composed of a plurality of sealing units arranged along the surface of the pipeline.

[0008] Further, the sealing unit includes an arc-shaped support assembly, along the rotation direction of the pipeline axis, one side of the support assembly is provided with a first protrusion, the other side of the support assembly is provided with a first connecting groove, and the first protrusion on the support assembly of the first sealing unit is detachably connected with the first connecting groove on the support assembly of the second sealing unit, and the same applies to the subsequent steps, and the plurality of support assemblies form a plurality of annular structures arranged outside the pipeline.

[0009] Along the pipeline axis direction, the two adjacent annular structures are provided with connecting assemblies, and the left side / right side of the first annular structure is connected with the left side / right side of the second annular structure through the left side / right side of the first connecting piece, and the last annular structure on the left side / right side is detachably connected with the left side / right side of the telescopic assembly, and the middle side of the telescopic assembly is in contact with the side of the annular structure away from the pipeline.

[0010] The third sealing pad is arranged at the edge of the support assembly close to the side of the pipeline, so that the third sealing pads on the adjacent support assemblies are in contact.

[0011] Further, each connecting assembly comprises two groups of second protrusions and a group of connecting pieces, one group of second protrusions is connected to one side of one annular structure, and the other group of second protrusions is connected to the opposite side of the other annular structure, the two groups of second protrusions are staggered, and the ends of the two groups of second protrusions away from the support assembly are connected with a group of connecting pieces.

[0012] Further, each group of connecting pieces comprises a plurality of arc-shaped plates, the number of the arc-shaped plates is the same as the number of the support assemblies in one group of annular structures, and the length of the arc-shaped plates is the same as the length of the support assemblies.

[0013] Each group of second protrusions comprises a plurality of second protrusions which are the same in number as the number of the arc-shaped plates in one group, and the plurality of second protrusions are arranged in a ring array on one side of the annular structure.

[0014] Further, the support assembly comprises an arc-shaped connecting frame, one side of the connecting frame is fixedly connected with the first protrusion along the rotation direction of the pipeline axis, and the other side of the connecting frame is provided with a first connecting groove.

[0015] Along the pipeline axis direction, the opposite sides of the connecting frame are connected with two second protrusions and arc-shaped plates respectively.

[0016] The inner side of the connecting frame is fixedly connected with an arc-shaped bin, the inner side of the arc-shaped bin close to the surface of the pipeline is slidably connected with a first sealing pad and a second sealing pad, and a control assembly is arranged between the first sealing pad and the second sealing pad, so that the first sealing pad drives the second sealing pad to move towards the surface of the pipeline through the control assembly.

[0017] Further, the control assembly comprises a positioning ring installed in the arc-shaped bin, the outer side of the positioning ring is slidably connected with the inner side of the second sealing pad, the inner side of the positioning ring is slidably connected with the first sealing pad, and a buffer structure is further connected to the positioning ring, and the two ends of the buffer structure are connected with the second sealing pad and the first sealing pad respectively.

[0018] Further, the buffer structure comprises a positioning hole, a first air bag and a ring-shaped second air bag.

[0019] One side of the first air bag is fixedly connected with one side of the first sealing gasket, the other side of the first air bag is located between the positioning hole and the first sealing gasket, and the first air bag is arranged on the inner side of the positioning ring;

[0020] One side of the second air bag is fixedly connected with one side of the second sealing gasket, the other side of the second air bag is located between the positioning hole and the second sealing gasket, and the annular second air bag is arranged on the outer side of the positioning ring and the inner side of the arc-shaped bin.

[0021] Further, the telescopic assembly comprises two control rings which are detachably connected with corresponding second protrusions on a plurality of connecting frames on the leftmost side / rightmost side respectively, and the side faces of the two control rings close to each other are respectively provided with a plurality of first connecting rods and second connecting rods, one side of the first connecting rod and one side of the second connecting rod are slidingly connected, and the side of the first connecting rod and the second connecting rod close to the surface of the pipeline is in contact with the side of the connecting frame away from the pipeline.

[0022] Compared with the prior art, the oil exploitation pipeline leakage prevention device has the following beneficial effects:

[0023] The utility model discloses a plurality of support assemblies are assembled into the sealable assembly, and the sealable assembly of proper area size is assembled according to different size gaps, then the clamping force in the pipeline axis direction is provided through the telescopic assembly, the plurality of support assemblies keep sealing, and the gap on the pipeline is plugged by the clamping of the clamp on the surface of the pipeline gap, so that the problem that the existing repair block is inconvenient to extend or reduce, is difficult to adjust properly according to the size of the gap and causes the poor use effect is solved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0025] Figure 2 It is the partial exploded schematic diagram in the utility model;

[0026] Figure 3 It is the three-dimensional structure schematic diagram of the first connecting rod in the utility model;

[0027] Figure 4 It is the three-dimensional structure schematic diagram of the arc-shaped plate in the utility model;

[0028] Figure 5 It is the three-dimensional structure schematic diagram of the connecting frame in the utility model;

[0029] Figure 6 It is the sectional view of the arc-shaped bin in the utility model;

[0030] Figure 7 It is the exploded structure schematic diagram of the positioning ring and the arc-shaped bin in the utility model.

[0031] In the figure: 1, the clamp; 2, the third sealing pad; 3, the telescopic assembly; 301, the first connecting rod; 302, the second connecting rod; 303, the control ring; 4, the arc-shaped bin; 5, the connecting frame; 6, the arc-shaped plate; 7, the first protrusion; 8, the second protrusion; 9, the positioning ring; 10, the first fixed strip; 11, the first sealing pad; 12, the first air bag; 13, the second air bag; 14, the second fixed strip; 15, the second sealing pad. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] As Figures 1-7 shown, the utility model provides a kind of technical scheme: a kind of petroleum exploitation pipeline leak protection device, including two clamps 1, and the telescopic assembly 3 of lockable is provided between two clamps 1, and the sealing assembly of extendable is provided between telescopic assembly 3, play the role of plugging to different size gap;Sealing assembly is by a plurality of sealing units along the surface of pipeline interconnects and is formed;Sealing unit includes arc-shaped support assembly, along the rotation direction of pipeline axis, the side of support assembly is provided with first protrusion 7, the other side of support assembly is provided with first connecting groove, and the first protrusion 7 on the support assembly of first sealing unit is detachably connected with the first connecting groove on the support assembly of second sealing unit, in turn, a plurality of support assemblies form a plurality of annular structure sets in the outside of pipeline;Along the direction of pipeline axis, the connecting assembly is provided between the two adjacent annular structures, to take the gap of pipeline as starting point, the left side / right side of first annular structure is connected with the left side / right side of second annular structure by the left side / right side of first connecting piece, in turn, the side of left side / right side of last annular structure is respectively detachably connected with the left side / right side of telescopic assembly 3, and the middle side of telescopic assembly 3 is in contact with the side of annular structure away from pipeline;The edge of the side of support assembly close to pipeline is provided with third sealing pad 2, to make the third sealing pad 2 on the adjacent support assembly contact.

[0034] In use, the number of telescopic assemblies 3 and clamps 1 is two, symmetrically distributed on both sides of the leakage position, and the middle part of the telescopic assembly 3 spans several annular structures and abuts against the back of the annular structure. After fixing, one clamp 1 is fixed on the outside of the pipeline by bolts through two semicircular structures, so that the mutual close force between the two semicircular structures is transmitted to the outside of the annular structure through the telescopic assembly 3, so as to ensure that the third sealing gasket 2 on the inside of the annular structure is extruded on the surface of the pipeline. The third sealing gasket 2 is made of rubber material, and at the same time, the third sealing gasket 2 deforms and extends to the two sides, so that the two third sealing gaskets 2 in contact with each other are extruded, and the telescopic assembly 3 extends along the pipeline axis direction, and at the same time provides extrusion force for the third sealing gasket 2 in the pipeline axis direction, so as to ensure that the several support assemblies maintain sealing.

[0035] Each connecting assembly includes two groups of second protrusions 8 and a group of connecting pieces, one group of second protrusions 8 is connected to one side of one annular structure, and the other group of second protrusions 8 is connected to the other side of the opposite annular structure. The two groups of second protrusions 8 are staggered and connected to a group of connecting pieces at the ends away from the support assembly.

[0036] In use, a group of connecting pieces is arranged between each two groups of second protrusions 8, and the connecting pieces are connected to the two groups of second protrusions 8 at the same time. The two sides of the connecting pieces are respectively inserted into the sliding grooves on the sides of the annular structures to assemble the two annular structures.

[0037] Each group of connecting pieces includes several arc-shaped plates 6, and the number of arc-shaped plates 6 in each group is the same as the number of support assemblies in a group of annular structures, and the length of the arc-shaped plate 6 is the same as the length of the support assembly. Each group of second protrusions 8 includes several second protrusions 8, and the number of second protrusions 8 in each group is the same as the number of arc-shaped plates 6 in a group. The second protrusions 8 are arranged in a ring array on one side of the annular structure. In use, two second protrusions 8 are arranged on the two sides of one support assembly, and the two second protrusions 8 are staggered and arranged along the pipeline axis direction. From the leakage point to the right, they are in turn a first group of support assemblies, a second group of support assemblies, and so on. The first group of arc-shaped plates 6, the second group of arc-shaped plates 6, and so on. In the clockwise direction around the pipeline axis, they are in turn a first support assembly, a second support assembly, and so on. They are in turn a first arc-shaped plate 6, a second arc-shaped plate 6, and so on.

[0038] The middle of the lower half of the right side of the first support assembly of the first group is fixedly connected with a second protrusion 8, the right side of the first support assembly of the first group and the left side of the first support assembly of the second group abut each other and are both provided with a sliding groove, an arc-shaped plate 6 is arranged between the two, the first arc-shaped plate 6 of the first group is clamped with the second protrusion 8 on the right side of the first support assembly of the first group, meanwhile, the upper half of the first arc-shaped plate 6 of the first group is distributed in the sliding groove of the first support assembly of the first group and the first support assembly of the second group respectively, the lower half of the first arc-shaped plate 6 of the first group is distributed in the sliding groove of the second support assembly of the first group and the second support assembly of the second group respectively and is clamped with the second protrusion 8 on the left side of the second support assembly of the second group, and then the left side and the right side are the same, and the leakage point is taken as a starting point, sequentially extending in the axial direction of the pipeline and the rotation direction of the surface, assembling a sealing assembly of appropriate size and plugging different sizes of gaps.

[0039] The support assembly comprises an arc-shaped connecting frame 5, one side of the connecting frame 5 is fixedly connected with the first protrusion 7 along the rotation direction of the pipeline axis, and the other side of the connecting frame 5 is provided with a first connecting groove; the opposite sides of the connecting frame 5 are connected with two second protrusions 8 and an arc-shaped plate 6 along the pipeline axis direction; the inner side of the connecting frame 5 is fixedly connected with an arc-shaped bin 4, the first sealing gasket 11 and the second sealing gasket 15 are slidably connected to the inner side of the arc-shaped bin 4, and a control assembly is arranged between the first sealing gasket 11 and the second sealing gasket 15, so that the first sealing gasket 11 drives the second sealing gasket 15 to move towards the surface of the pipeline through the control assembly.

[0040] The first protrusion 7 is in the shape of an isosceles trapezoid and is fixedly connected with the support assembly, when assembling, the first connecting groove on the other support assembly is pushed along the first protrusion 7, so that the first protrusion 7 is clamped with the first connecting groove, the two first support assemblies are assembled in a ring shape along the pipeline, a plurality of support assemblies form an arc-shaped ring, and the arc-shaped plate 6 and the second protrusion 8 are extended and assembled in the axial direction, and the surfaces of the arc-shaped plate 6 and the first protrusion 7 are both provided with a rubber sleeve, the sizes of the sliding groove and the arc-shaped plate 6 and the first connecting groove and the first protrusion 7 are adapted to each other, so that the rubber sleeve is extruded after assembly, appropriate elastic support is provided for the contacted parts, and the sealing performance of the assembled position is further improved.

[0041] The control assembly comprises a positioning ring 9 installed inside the arc-shaped bin 4, the outer side of the positioning ring 9 is in sliding connection with the inner side of the second sealing pad 15, the inner side of the positioning ring 9 is in sliding connection with the first sealing pad 11, and a buffer structure is further connected to the positioning ring 9, both ends of the buffer structure are connected with the second sealing pad 15 and the first sealing pad 11 respectively; in use, the outer side of the second sealing pad 15 is provided with a second limiting groove, a second fixing strip 14 is in sliding connection in the second limiting groove, the outer side of the second fixing strip 14 is fixedly connected with the inner wall of the arc-shaped bin 4, the outer side of the second sealing pad 15 is in sliding connection with the side wall inside the arc-shaped bin 4 and is limited by the second fixing strip 14 to limit the sliding distance.

[0042] The outer side of the first sealing pad 11 is provided with a first limiting groove, the inner wall of the first limiting groove is in sliding connection with a first fixing strip 10, the outer side of the first fixing strip 10 is fixedly connected with the inner wall of the positioning ring 9, thereby limiting the sliding distance of the first sealing pad 11; the buffer structure comprises a positioning hole provided on the positioning ring 9, a first air bag 12 and a ring-shaped second air bag 13; one side of the first air bag 12 is fixedly connected with one side of the first sealing pad 11, the other side of the first air bag 12 is located between the positioning hole and the first sealing pad 11, and the first air bag 12 is arranged on the inner side of the positioning ring 9; one side of the second air bag 13 is fixedly connected with one side of the second sealing pad 15, the other side of the second air bag 13 is located between the positioning hole and the second sealing pad 15, and the ring-shaped second air bag 13 is arranged on the outer side of the positioning ring 9 and the inner side of the arc-shaped bin 4.

[0043] In use, the first sealing gasket 11, the second sealing gasket 15 and the third sealing gasket 2 are the same in mass, the first sealing gasket 11 is arranged at the opening of the arc-shaped bin 4 towards the pipeline surface and is pressed against the pipeline surface, the second sealing gasket 15 and the third sealing gasket 2 are both arc-shaped rectangular rings, the first sealing gasket 11 is located in the middle and the second sealing gasket 15 and the third sealing gasket 2 are sequentially arranged outside; when the first sealing gasket 11 is impacted by the oil leaking from the gap, if the first sealing gasket 11 is larger than the gap, the first sealing gasket 11 pushes one side of the first air bag 12 to contract, the other side of the first air bag 12 is fixedly connected with the inner wall of the positioning ring 9, so that the side of the first air bag 12 expands, pushes the liquid in the arc-shaped bin 4 to move, so that the liquid passes through the positioning hole and flows to the outside of the positioning ring 9, and pushes the second air bag 13 away from one side of the second sealing gasket 15, since the side is fixed on the arc-shaped bin 4 and the positioning ring 9, and the second sealing gasket 15 is located outside the gap and contacts the pipeline surface, the extrusion force received is smaller than that at the gap leaking position, so that the fluid pushes one side of the second air bag 13 to compress and the other side to expand, i.e. the second sealing gasket 15 is pushed to extrude against the pipeline surface, the extrusion force between the second sealing gasket 15 and the pipeline surface is increased, and the sealing effect is improved; when the gap is larger than one first sealing gasket 11, one sealing assembly larger than the gap is assembled through the connecting frame 5, and the first sealing gasket 11 and the second sealing gasket 15 distributed on the gap are impacted, since the first air bag 12 and the second air bag 13 are both installed in the arc-shaped bin 4, and the outer side of the arc-shaped bin 4 is fixed by the telescopic assembly 3 and the clamp 1 through the connecting frame 5, the first air bag 12 and the second air bag 13 are compressed and reversely support the first sealing gasket 11 and the second sealing gasket 15, the gap between the assembled sealing assemblies is sealed by the third sealing gasket 2, the arc-shaped plate 6 and the first protrusion 7, so that the gap between the assembled sealing assemblies does not leak, and then the first sealing gasket 11, the second sealing gasket 15 and the third sealing gasket 2 at the outermost side of the sealing assembly larger than the gap are in contact with the pipeline surface, so as to seal the gap on the side of the gap, so as to assemble the sealing assembly according to the size of the gap.

[0044] The telescopic assembly 3 comprises two control rings 303 which are detachably connected to the corresponding second protrusions 8 on the leftmost / rightmost connecting frames 5, and the side of the two control rings 303 close to each other is respectively provided with a plurality of first connecting rods 301 and second connecting rods 302, one side of the first connecting rod 301 and one side of the second connecting rod 302 are slidingly connected, and the side of the first connecting rod 301 and the second connecting rod 302 close to the surface of the pipeline is in contact with the side of the connecting frame 5 away from the pipeline; in use, the outer side of the first connecting rod 301 is provided with two second connecting rods 302, the first connecting rod 301 is slidingly connected between the two second connecting rods 302, the first connecting rod 301 and the second connecting rod 302 are detachably connected with the control ring 303, and the distance between the two adjacent first connecting rods 301 is adapted to the arc size of the connecting frame 5, and the holes on the control ring 303 correspond to the positions of the second protrusions 8, which is convenient for fixing on both sides, and at the same time, the back side of each connecting frame 5 is provided with a set of first connecting rods 301 and second connecting rods 302 for support.

[0045] The control ring 303 is detachably connected with the clamp 1, and the control ring 303 is in a semicircular shape; the first connecting rod 301 is provided with a self-locking assembly which locks the first connecting rod 301 and the second connecting rod 302, the self-locking assembly comprises a threaded rod which penetrates the first connecting rod 301, and the two ends of the threaded rod are threadedly connected with nuts, and one of the nuts is located at the end of the second connecting rod 302 away from the first connecting rod 301; or a plurality of threaded holes are formed on the first connecting rod 301 and the second connecting rod 302, and the threaded holes are locked by a bolt penetrating the two threaded holes, which limits the extension of the telescopic assembly 3 to both sides, and at the same time provides a clamping force in the direction of the pipeline axis for the plurality of connecting frames 5, so as to keep the connecting frames 5 sealed, and the first connecting rod 301 and the second connecting rod 302 are driven by the clamp 1 to make the connecting frames 5 press on the surface of the pipeline, which is used for adhering to the surface of the pipeline to play a sealing role.

Claims

1. A leak-proof device for oil extraction pipes comprising two clamps (1), characterized in that, The two clamps (1) are provided with a lockable telescopic assembly (3), and the telescopic assembly (3) is provided with an extendable sealing assembly, which plays a role in plugging different size gaps. The sealing assembly is composed of a plurality of sealing units arranged on the surface of the pipeline and connected with each other.

2. The petroleum production tubing leak prevention device of claim 1, wherein: The sealing unit comprises an arc-shaped support assembly, and a first protrusion (7) is arranged on one side of the support assembly along the rotation direction of the pipeline axis, and a first connecting groove is arranged on the other side of the support assembly, and the first protrusion (7) on the support assembly of the first sealing unit is detachably connected with the first connecting groove on the support assembly of the second sealing unit, and the same applies to the subsequent support assemblies, and a plurality of annular structures are formed by a plurality of support assemblies arranged outside the pipeline. Along the pipeline axis direction, a connecting assembly is arranged between the adjacent two annular structures, and the left side / right side of the first annular structure is connected with the left side / right side of the second annular structure through the left side / right side of the first connecting piece, and the same applies to the subsequent annular structures, and one side of the last annular structure on the left side / right side is detachably connected with the left side / right side of the telescopic assembly (3), and one side of the middle part of the telescopic assembly (3) is in contact with the side of the annular structure away from the pipeline. A third sealing gasket (2) is arranged at the edge of the side of the support assembly close to the pipeline, so that the third sealing gaskets (2) on the adjacent support assemblies are in contact.

3. The petroleum production tubing leak prevention device of claim 2, wherein: Each connecting assembly comprises a plurality of second protrusions (8) and a connecting piece, one group of second protrusions (8) is connected to one side of one of the annular structures, the other group of second protrusions (8) is connected to one side of the opposite annular structure, the two groups of second protrusions (8) are staggered, and the ends of the two groups of second protrusions (8) away from the support assembly are connected with the connecting piece.

4. The petroleum production tubing leak prevention device of claim 3, wherein: Each connecting piece comprises a plurality of arc-shaped plates (6), the number of the arc-shaped plates (6) in one group is the same as the number of the support assemblies in one group of annular structures, and the length of the arc-shaped plates (6) is the same as the length of the support assemblies. Each group of second protrusions (8) comprises a plurality of second protrusions (8) which are the same in number as the arc-shaped plates (6) in one group, and the second protrusions (8) are arranged in a ring array on one side of the annular structure.

5. The petroleum production tubing leak prevention device of claim 4, wherein: The support assembly comprises an arc-shaped connecting frame (5), and one side of the connecting frame (5) is fixedly connected with the first protrusion (7) along the rotation direction of the pipeline axis, and the other side of the connecting frame (5) is provided with a first connecting groove; Along the pipeline axis direction, the opposite sides of the connecting frame (5) are respectively connected with two second protrusions (8) and arc-shaped plates (6); The arc-shaped bin (4) is fixedly connected inside the connecting frame (5), the first sealing gasket (11) and the second sealing gasket (15) are slidably connected to the inside of the arc-shaped bin (4) near the surface of the pipeline, and the control assembly is arranged between the first sealing gasket (11) and the second sealing gasket (15), so that the first sealing gasket (11) drives the second sealing gasket (15) to move towards the surface of the pipeline through the control assembly.

6. The petroleum production tubing leak prevention device of claim 5, wherein: The control assembly comprises a positioning ring (9) installed inside the arc-shaped bin (4), the outer side of the positioning ring (9) is slidably connected to the inner side of the second sealing gasket (15), the inner side of the positioning ring (9) is slidably connected to the first sealing gasket (11), and the positioning ring (9) is further connected with a buffer structure, and the two ends of the buffer structure are connected with the second sealing gasket (15) and the first sealing gasket (11) respectively.

7. The petroleum production tubing leak prevention device of claim 6, wherein: The buffer structure comprises a positioning hole, a first air bag (12) and a ring-shaped second air bag (13) formed in the positioning ring (9). One side of the first air bag (12) is fixedly connected to one side of the first sealing gasket (11), the other side of the first air bag (12) is located between the positioning hole and the first sealing gasket (11), and the first air bag (12) is arranged on the inner side of the positioning ring (9). One side of the second air bag (13) is fixedly connected to one side of the second sealing gasket (15), the other side of the second air bag (13) is located between the positioning hole and the second sealing gasket (15), and the ring-shaped second air bag (13) is arranged on the outer side of the positioning ring (9) and the inner side of the arc-shaped bin (4).

8. The petroleum production tubing leak prevention device of claim 5, wherein: The telescopic assembly (3) comprises two control rings (303), the corresponding second protrusions (8) on the leftmost / rightmost side of each of the two control rings (303) are detachably connected to the corresponding connecting frames (5), the side surfaces of the two control rings (303) close to each other are respectively provided with a plurality of first connecting rods (301) and second connecting rods (302), one side of the first connecting rod (301) and one side of the second connecting rod (302) are slidably connected, and the side of the first connecting rod (301) and the side of the second connecting rod (302) close to the surface of the pipeline are in contact with the side of the connecting frame (5) away from the pipeline.

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