Anti-corrosion pipe plugging

Abstract

The present invention provides an anti-corrosion plugging pipe, which relates to the technical field of casing repair, and comprises an outer layer plugging mechanism, an end locking assembly, an inner layer plugging mechanism and an adjusting rod. Positioning channels are provided on the inner walls of the outer layer plugging mechanism and the end locking assembly, a spring rod is inserted into the positioning channel, and a gap is provided between the inner walls of the outer layer plugging mechanism and the end locking assembly and the surface of the oil well pipeline body, and a rubber ring is sleeved on the side of the inner layer plugging mechanism. The present invention can avoid sliding friction with the surface of the pipeline to be repaired during the insertion process, avoids the problem of wear on the surfaces of other areas of the pipeline to be repaired and the inner wall of the plugging pipe, and ensures that the end can maintain a high-pressure sealing state during the subsequent pouring of cement, cooperates with the inner layer plugging mechanism to prevent a large amount of cement from penetrating into the interior, and the inner layer structure can be taken out after the repair and plugging is completed, and the cement that has penetrated into the interior can be polished and eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of casing repair, in particular to an anti-corrosion plugging pipe. Background Art

[0002] After the oil well pipeline is damaged, it can be repaired to comprehensively detect the corrosion degree, damage, support status, etc. of the pipeline, and hidden problems can be discovered and dealt with in time, thereby extending the service life of the pipeline. Potential problems can be identified and dealt with in time through repair, avoiding small problems from gradually expanding and leading to greater losses and higher repair costs. In addition, using pipe plugging for repair is a targeted maintenance method that can avoid unnecessary repairs and reduce overall maintenance costs.

[0003] In the prior art, the plugging pipe used for damaged oil well pipelines is directly sleeved from the outside to the surface of the pipeline to be repaired, and after sliding to the damaged area, cement can be poured for repair. However, in order to ensure that the cement does not seep out of the edge of the plugging pipe, it is necessary to ensure that the edge of the plugging pipe and the surface of the pipeline to be repaired are kept in a tightly pressed state. This causes the surface of other areas of the pipeline to be repaired and the inner wall of the plugging pipe to be worn due to the pressing state during the forward penetration process, and also causes the sleeve process to be time-consuming, labor-intensive, and difficult to operate. On the other hand, it is easy for cement to penetrate into some damaged pipes when poured, and only by installing a retaining structure on the inside, the diameter of the inner wall will change, thus affecting the subsequent liquid flow. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an anti-corrosion plugging pipe to solve the problems raised in the above-mentioned background technology. The present invention can generate no sliding friction with the surface of the pipe to be repaired during the penetration process, thereby avoiding the problem of wear on the surfaces of other areas of the pipe to be repaired and the inner wall of the plugging pipe, and ensuring that the end can maintain a high-pressure sealing state during the subsequent pouring of cement. The inner layer sealing mechanism can prevent a large amount of cement from penetrating into the interior, and the inner layer structure can be taken out after the repair and plugging is completed, and the cement that has penetrated into the interior can be polished and eliminated.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: an anti-corrosion plugging pipe, comprising a plugging pipe body and an oil well pipeline body, the plugging pipe body comprising an outer layer plugging mechanism, an end locking assembly, an inner layer plugging mechanism and an adjusting rod, the inner walls of the outer layer plugging mechanism and the end locking assembly are both provided with positioning channels, a spring rod is inserted into the interior of the positioning channel, and a gap is provided between the inner walls of the outer layer plugging mechanism and the end locking assembly and the surface of the oil well pipeline body, the side of the inner layer plugging mechanism is sleeved with a rubber ring, the side of the rubber ring is covered with a sealing film, both ends of the sealing film are integrally mounted on the surface of the inner layer plugging mechanism, the adjusting rod passes through the middle position of the inner layer plugging mechanism, the sealing film is stretched open by the inner rubber ring and pressed on the inner wall of the oil well pipeline body, the number of the end locking assemblies is two, and the two end locking assemblies are respectively embedded in the inner sides of the two ends of the outer layer plugging mechanism, and the surface of the outer layer plugging mechanism is coated with a corrosion-resistant coating.

[0006] Furthermore, the outer sealing mechanism includes an outer sealing sleeve and an extrusion strip, a second docking ring is integrally formed at both ends of the outer sealing sleeve, a plug-in groove is provided between the extrusion strip and the outer sealing sleeve, and a casting hole is provided on the surface of the outer sealing sleeve.

[0007] Furthermore, a telescopic groove is provided on the inner wall of the outer sealing sleeve, a telescopic rod is embedded in the telescopic groove, the bottom of the extrusion strip is attached to the surface of the telescopic rod, there are multiple telescopic rods, and each telescopic rod is evenly distributed around the extrusion strip.

[0008] Furthermore, the end locking assembly includes an end extrusion sleeve and an insert bevel plate, the insert bevel plate is integrally formed at the bottom of the end extrusion sleeve, a first docking ring is provided on the side of one end of the end extrusion sleeve, and a ball is embedded at the end of the spring rod.

[0009] Furthermore, the spring rod is pressed against the surface of the oil well pipe body through the ball at the end, and the spring rod is evenly distributed around the oil well pipe body, the plug-in inclined plate is used to be embedded in the inside of the plug-in groove, and the plug-in inclined plate is pressed against the outside of the extrusion strip, and the first docking ring and the second docking ring are locked and connected by bolts.

[0010] Furthermore, the inner sealing mechanism includes an inner sleeve and an outer sleeve, and an interlayer is provided between the inner sleeve and the outer sleeve, a support sleeve is inserted inside the interlayer, a reset spring is connected to the bottom of the support sleeve, the bottom of the reset spring is welded to the inner wall of the interlayer, and a pull rope is connected to the end of the support sleeve.

[0011] Furthermore, a threading hole is provided on the surface of the inner sleeve, and the pull rope passes through the threading hole. A rubber ring is sleeved on the surface of the inner sleeve. There are four pull ropes, and each pull rope is evenly connected to the edge of the supporting sleeve.

[0012] Furthermore, the end of the support sleeve is in a beveled state, and after the support sleeve moves upward, it is used to stretch the rubber ring toward the outside. A grinding ring is embedded in the end of the outer sleeve. There are two rubber rings, and one end of the sealing film is attached to the end of the outer sleeve.

[0013] Furthermore, a fixing plate is welded to the bottom end of the adjusting rod, a limiting baffle is integrally formed at the top end of the adjusting rod, a clamping plate is integrally formed at the top of the limiting baffle, a supporting frame is welded to the inner wall of the inner sleeve, and a docking sleeve is welded to the inner side of the supporting frame.

[0014] Furthermore, a card slot is provided inside the docking sleeve, a connecting column is integrally formed on the top of the card plate, a pull ring is welded on the top of the connecting column, and the end of each pull rope is fixedly connected to the pull ring.

[0015] Beneficial effects of the present invention:

[0016] 1. With the help of the outer sealing mechanism, the anti-corrosion plugging pipe can avoid sliding friction with the surface of the pipe to be repaired during the insertion process, avoiding the problem of wear on the surface of other areas of the pipe to be repaired and the inner wall of the plugging pipe, and ensuring that the end can maintain a high-pressure sealing state during the subsequent pouring of cement.

[0017] 2. The anti-corrosion plugging pipe is provided with an inner layer plugging mechanism to support and seal the inner wall area of ​​the pipe to be repaired. Cooperating with the outer layer plugging mechanism, it can prevent a large amount of cement from penetrating into the interior, and the inner layer structure can also be removed after the repair and plugging is completed.

[0018] 3. After the anti-corrosion plugging pipe is poured with cement, the inner sealing mechanism can be rotated with the help of the adjusting rod. The cement that has penetrated into the interior can be polished and eliminated by this process, thereby avoiding a large amount of cement adhering to the inner wall of the pipe to be repaired, so that the inner wall always remains flat and avoids interference with the subsequent flow of liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded view of an anti-corrosion plugging pipe according to the present invention;

[0020] Figure 2 A side cross-sectional view of an anti-corrosion plugging pipe after installation according to the present invention;

[0021] Figure 3It is a schematic diagram of the connection between the outer layer blocking mechanism and the end locking assembly of the present invention;

[0022] Figure 4 for Figure 2 A magnified image of area A;

[0023] Figure 5 It is a structural schematic diagram of the inner layer blocking mechanism part of the present invention;

[0024] Figure 6 It is a side sectional view of the inner layer blocking mechanism of the present invention;

[0025] Figure 7 It is a schematic diagram of the connection between the docking sleeve and the clamping plate of the present invention;

[0026] In the figure: 1. oil well pipeline body; 2. outer layer plugging mechanism; 3. end locking assembly; 4. inner layer plugging mechanism; 5. adjusting rod; 6. end extrusion sleeve; 7. spring rod; 8. ball; 9. first docking ring; 10. outer layer plugging sleeve; 11. second docking ring; 12. plug-in groove; 13. extrusion strip; 14. casting hole; 15. plug-in inclined plate; 16. positioning channel; 17. telescopic groove; 18. telescopic rod; 19. inner layer casing; 20. sealing film; 21. outer layer casing; 22. grinding ring; 23. pull rope; 24. card plate; 25. limit baffle; 26. fixing plate; 27. interlayer; 28. support sleeve; 29. ​​reset spring; 30. rubber ring; 31. threading hole; 32. pull ring; 33. docking sleeve; 34. support frame; 35. card slot; 36. connecting column. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7The present invention provides the following technical solutions: an anti-corrosion plugging pipe, comprising a plugging pipe body and an oil well pipeline body 1, the plugging pipe body comprising an outer plugging mechanism 2, an end locking assembly 3, an inner plugging mechanism 4 and an adjusting rod 5, the inner walls of the outer plugging mechanism 2 and the end locking assembly 3 are both provided with a positioning channel 16, a spring rod 7 is inserted into the positioning channel 16, and a gap is provided between the inner walls of the outer plugging mechanism 2 and the end locking assembly 3 and the surface of the oil well pipeline body 1, the The side of the inner plugging mechanism 4 is sleeved with a rubber ring 30, and the side of the rubber ring 30 is covered with a sealing film 20. Both ends of the sealing film 20 are integrally mounted on the surface of the inner plugging mechanism 4. The adjusting rod 5 passes through the middle position of the inner plugging mechanism 4. The sealing film 20 is pressed on the inner wall of the oil well pipeline body 1 after being stretched open by the inner rubber ring 30. The number of the end locking components 3 is two, and the two end locking components 3 are respectively embedded in the inner sides of the two ends of the outer plugging mechanism 2. The anti-corrosion plugging pipe is used to plug the surface of the damaged oil well pipeline and pour cement for repair.

[0029] When the present invention is used, the outer layer sealing mechanism 2 is first sleeved on the surface of the pipe to be repaired, and then the upper end locking components 3 are respectively sleeved on both ends. The outer layer sealing mechanism 2 is pressed against and squeezed with the help of the end locking components 3, and it is ensured that the outer layer sealing mechanism 2 will enclose and seal the damaged area on the surface of the pipe to be repaired, and then the inner layer sealing mechanism 4 is penetrated into the interior of the pipe to be repaired and also moved to the inner side of the broken area. With the help of the external adjusting rod 5, the support sleeve 28 is manually controlled to move so that the entire inner layer sealing mechanism 4 is pressed against the inner wall of the pipe to be repaired. At this time, cement can be poured from the pouring hole 14 into the interior of the outer layer sealing mechanism 2 to achieve sealing of the damaged area. After the pouring is completed and solidified, the adjusting rod 5 can be controlled again to drive the inner layer sealing mechanism 4 to rotate, and the cement part that has penetrated into the interior is polished during the advancement process. A fluorocarbon coating is coated on the surface of the outer layer sealing mechanism 2 to improve corrosion resistance.

[0030] In this embodiment, the outer plugging mechanism 2 includes an outer plugging sleeve 10 and an extrusion strip 13. The two ends of the outer plugging sleeve 10 are integrally formed with a second docking ring 11. A plugging groove 12 is provided between the extrusion strip 13 and the outer plugging sleeve 10. A casting hole 14 is provided on the surface of the outer plugging sleeve 10. A telescopic groove 17 is provided on the inner wall of the outer plugging sleeve 10. A telescopic rod 18 is embedded in the telescopic groove 17. The bottom of the extrusion strip 13 is attached to the surface of the telescopic rod 18. There are multiple telescopic rods 18, and each telescopic rod 18 is evenly distributed around the extrusion strip 13. With the help of the outer plugging mechanism 2, no sliding friction is generated with the surface of the pipeline to be repaired during the penetration process, avoiding the problem of wear on the surface of other areas of the pipeline to be repaired and the inner wall of the plugged pipe, and ensuring that the end can maintain a high-pressure sealing state during the subsequent cement pouring.

[0031] Specifically, the outer layer sealing mechanism 2 only pushes the ball 8 against the surface of the pipe to be repaired through the multiple spring rods 7 on the inner side. Therefore, when the entire outer layer sealing mechanism 2 is sleeved on the surface of the pipe to be repaired, there is always a gap between the extrusion strip 13 and the surface of the pipe to be repaired. With the help of this gap, friction with the surface of the pipe to be repaired can be avoided, and the protection effect of the inner wall of the outer layer sealing mechanism 2 can also be improved in the process.

[0032] In this embodiment, the end locking assembly 3 includes an end extrusion sleeve 6 and an insertion inclined plate 15, the insertion inclined plate 15 is integrally formed at the bottom of the end extrusion sleeve 6, a first docking ring 9 is provided on one end side of the end extrusion sleeve 6, and a ball 8 is embedded at the end of the spring rod 7. The spring rod 7 is pressed against the surface of the oil well pipeline body 1 through the ball 8 at the end, and the spring rod 7 is evenly distributed around the oil well pipeline body 1, the insertion inclined plate 15 is used to be embedded in the inside of the insertion groove 12, and the insertion inclined plate 15 is pressed against the outside of the extrusion strip 13, and the first docking ring 9 and the second docking ring 11 are locked and connected by bolts.

[0033] Specifically, after completing the installation of the end locking components 3, control the first docking rings 9 of the two end locking components 3 to lean against the two end positions of the outer sealing mechanism 2, and use bolts to lock and dock the end locking components 3 with the outer sealing mechanism 2. At this time, the plug-in inclined plate 15 in each end locking component 3 will be embedded into the inside of the plug-in groove 12 and lean against the outside of the extrusion strip 13. With the help of the leaning effect of the plug-in inclined plate 15, the extrusion strip 13 can be pressed against the surface of the pipe to be repaired. In this process, each telescopic rod 18 extends from the inside of the telescopic groove 17 to ensure that a sealed cavity structure is formed between the inside of the outer sealing mechanism 2 and the surface of the pipe to be repaired. Finally, cement can be poured directly from the pouring hole 14.

[0034] In this embodiment, the inner layer blocking mechanism 4 includes an inner layer sleeve 19 and an outer layer sleeve 21, and an interlayer 27 is provided between the inner layer sleeve 19 and the outer layer sleeve 21, a support sleeve 28 is inserted inside the interlayer 27, a reset spring 29 is connected to the bottom of the support sleeve 28, the bottom of the reset spring 29 is welded to the inner wall of the interlayer 27, and a pull rope 23 is connected to the end of the support sleeve 28. A threading hole 31 is provided on the surface of the inner layer sleeve 19, and the pull rope 23 passes through the inside of the threading hole 31. A rubber ring 30 is sleeved on the surface of the inner layer sleeve 19, and the number of the pull ropes 23 is four, and each pull rope 23 is evenly connected to the edge of the support sleeve 28. The end of the support sleeve 28 is in a bevel state, and after the support sleeve 28 moves upward, it is used to open the rubber ring 30 toward the outside. The end of the outer sleeve 21 is embedded with a grinding ring 22, and the number of the rubber rings 30 is two. One end of the sealing film 20 is attached to the end of the outer sleeve 21. After the cement is poured, the inner sealing mechanism 4 can be rotated by means of the adjusting rod 5. With the help of this process, the cement that has penetrated into the inside can be polished and eliminated, thereby avoiding a large amount of cement adhering to the inner wall of the pipeline to be repaired, so that the inner wall always remains flat and avoids interference with the flow of subsequent liquids. The bottom end of the adjusting rod 5 is welded with a fixing plate 26, and the top of the adjusting rod 5 is integrally formed with a limit baffle 25, and the top of the limit baffle 25 is integrally formed with a clamping plate 24. A support frame 34 is welded on the inner wall of the inner sleeve 19, and a docking sleeve 33 is welded on the inner side of the support frame 34. A card slot 35 is provided inside the docking sleeve 33, a connecting column 36 is integrally formed at the top of the card plate 24, a pull ring 32 is welded to the top of the connecting column 36, and the end of each pull rope 23 is fixedly connected to the pull ring 32. An inner layer plugging mechanism 4 is provided inside to support and seal the inner wall area of ​​the pipeline to be repaired, and the outer layer plugging mechanism 2 can prevent a large amount of cement from penetrating into the interior, and the inner layer structure can also be removed after the repair and plugging are completed.

[0035] Specifically, by manually controlling the adjusting rod 5, the entire inner layer plugging mechanism 4 is driven to move to the damaged area inside the pipe to be repaired. In the initial state, the adjusting rod 5 abuts against the inner layer plugging mechanism 4. In this process, the limit baffle 25 can be used to abut against the docking sleeve 33, so that the pull rope 23 does not provide tension to the support sleeve 28. The support sleeve 28 is always embedded in the inner layer 27 until the inner layer plugging mechanism 4 is in place. At this time, the adjusting rod 5 can be pulled to pull the support sleeve 28 out of the interlayer 27 with the help of the pull rope 23, and then the two can be connected with the help of the inclined surface at the end of the support sleeve 28. The rubber rings 30 are scooped up to make the two rubber rings 30 open, and the sealing film 20 can be pressed against the inner wall of the pipe to be repaired by means of the opening effect. Finally, the sealing film 20 is fitted with the damaged area of ​​the pipe to be repaired to avoid a large amount of cement penetration. After the pouring is completed and solidified, the clamping rod on the adjusting rod 5 can be controlled again to cooperate with the clamping groove 35 to rotate the entire inner layer sealing mechanism 4, and push it, so that the grinding ring 22 can grind the cement penetrated on the inner wall of the pipe to be repaired and the adhered sealing film 20, so as to ensure that the inner wall of the pipe to be repaired is kept flat.

[0036] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An anti-corrosion plugging pipe, comprising a plugging pipe body, the plugging pipe body is used to repair an oil well pipeline body (1), characterized in that: The plugging pipe body comprises an outer plugging mechanism (2), an end locking assembly (3), an inner plugging mechanism (4) and an adjusting rod (5); the inner walls of the outer plugging mechanism (2) and the end locking assembly (3) are provided with positioning channels (16); a spring rod (7) is inserted into the positioning channel (16); a gap is provided between the inner walls of the outer plugging mechanism (2) and the end locking assembly (3) and the surface of the oil well pipe body (1); a rubber ring (30) is sleeved on the side of the inner plugging mechanism (4); the side of the rubber ring (30) is covered with a sealing film (20); both ends of the sealing film (20) are integrally mounted on the surface of the inner plugging mechanism (4); the adjusting rod (5) is arranged from the inner plugging mechanism The outer sealing mechanism (2) is provided with a sealing film (20) which is stretched through the middle position of the outer sealing mechanism (4); the sealing film (20) is pressed against the inner wall of the oil well pipeline body (1) after being stretched open by the inner rubber ring (30); the number of the end locking components (3) is two, and the two end locking components (3) are respectively embedded in the inner sides of the two ends of the outer sealing mechanism (2); the surface of the outer sealing mechanism (2) is coated with a corrosion-resistant coating; the outer sealing mechanism (2) comprises an outer sealing sleeve (10) and an extrusion strip (13); the two ends of the outer sealing sleeve (10) are integrally formed with a second docking ring (11); a plug-in groove (12) is provided between the extrusion strip (13) and the outer sealing sleeve (10); and a casting hole (11) is provided on the surface of the outer sealing sleeve (10). 4), the end locking assembly (3) comprises an end extrusion sleeve (6) and an inserting inclined plate (15), the inserting inclined plate (15) is integrally formed at the bottom of the end extrusion sleeve (6), a first docking ring (9) is arranged on the side of one end of the end extrusion sleeve (6), a ball (8) is embedded at the end of the spring rod (7), the inner layer blocking mechanism (4) comprises an inner layer sleeve (19) and an outer layer sleeve (21), and an interlayer (27) is provided between the inner layer sleeve (19) and the outer layer sleeve (21), a support sleeve (28) is inserted inside the interlayer (27), a return spring (29) is connected to the bottom of the support sleeve (28), and the bottom of the return spring (29) is welded to the inner layer of the interlayer (27). The adjusting rod (5) is provided with a fixing plate (26) welded to the bottom end of the adjusting rod (5), a limit baffle (25) is integrally formed at the top end of the adjusting rod (5), a clamping plate (24) is integrally formed at the top end of the limit baffle (25), a supporting frame (34) is welded to the inner wall of the inner sleeve (19), a docking sleeve (33) is welded to the inner side of the supporting frame (34), a clamping groove (35) is provided inside the docking sleeve (33), a connecting column (36) is integrally formed at the top end of the clamping plate (24), a pull ring (32) is welded to the top end of the connecting column (36), and the end of each of the pull ropes (23) is fixedly connected to the pull ring (32).

2. The anti-corrosion plugging pipe according to claim 1, characterized in that: A telescopic groove (17) is provided on the inner wall of the outer sealing sleeve (10), a telescopic rod (18) is embedded in the telescopic groove (17), the bottom of the extrusion strip (13) is attached to the surface of the telescopic rod (18), there are a plurality of telescopic rods (18), and each telescopic rod (18) is evenly distributed around the extrusion strip (13).

3. The anti-corrosion plugging pipe according to claim 1, characterized in that: The spring rod (7) is pressed against the surface of the oil well pipe body (1) via a ball (8) at the end, and the spring rod (7) is evenly distributed around the oil well pipe body (1). The plug-in inclined plate (15) is used to be embedded in the plug-in groove (12), and the plug-in inclined plate (15) is pressed against the outside of the extrusion strip (13). The first docking ring (9) and the second docking ring (11) are locked and connected by bolts.

4. The anti-corrosion plugging pipe according to claim 3, characterized in that: A threading hole (31) is provided on the surface of the inner sleeve (19), and the pull rope (23) passes through the inside of the threading hole (31). A rubber ring (30) is sleeved on the surface of the inner sleeve (19). There are four pull ropes (23), and each pull rope (23) is evenly connected to the edge of the support sleeve (28).

5. The anti-corrosion plugging pipe according to claim 4, characterized in that: The end of the support sleeve (28) is in an inclined state, and after the support sleeve (28) moves upward, it is used to open the rubber ring (30) toward the outside. The end of the outer sleeve (21) is embedded with a grinding ring (22). The number of the rubber rings (30) is two, and one end of the sealing membrane (20) is attached to the end of the outer sleeve (21).

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