Seabed pipeline leakage plugging device

Abstract

The utility model belongs to the technical field of underwater pipeline repair, and provides a submarine pipeline leakage plugging device which comprises a pair of ring ribs, a plugging plate and a positioning plate, each ring rib is composed of a pair of semi-circular rings hinged together, the ring ribs are hooped and sleeved outside a pipeline in a closed mode through the ring ribs, hinge shafts of the two ring ribs are connected into a whole through a connecting rod, and the positioning plate is arranged on the plugging plate. The two ends of the annular rib extend outwards in the radial direction to form straight strip sections. The plugging plate is transversely arranged between the two annular ribs, and wing plates are arranged on the side edges of the plugging plate. The underwater pipeline leakage blocking device is suitable for leakage blocking operation of a seabed underwater pipeline, the leakage position of the pipeline is accurately sealed, the device is not affected by impurities attached to the outer wall of the underwater pipeline, the using effect is excellent, compared with a traditional pipe clamp mechanical sealing mode, the polishing area of the outer wall of the pipeline is greatly reduced, operation time is saved, and the working efficiency is improved. And the underwater staying time of the maintenance personnel is shortened, safe operation is ensured, and the personal safety of the maintenance personnel is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of underwater pipeline repair technology, specifically relating to a leak sealing device for subsea pipelines. Background Technology

[0002] Subsea pipelines are closed systems that continuously transport large quantities of oil (gas) across the seabed. They are a major component of offshore oil (gas) field development and production systems, and are the fastest, safest, and most economical and reliable mode of offshore oil and gas transportation.

[0003] Currently, when pipelines leak, the traditional mechanical seal method of completely covering the leaking part of the pipeline with pipe clamps is mainly used to plug the leak. However, on the one hand, due to the long-term adhesion of impurities to the outer wall of underwater pipelines, there are certain irregular deformations and abnormal protrusions on its surface, which makes it difficult for the pipe clamp mechanical seal to cover tightly and ensure the sealing of the leak, resulting in poor performance. On the other hand, grinding the pipeline underwater is difficult, and the longer it stays in the water, the greater the risk, which is likely to be detrimental to the personal safety of maintenance workers. Obviously, it is not practical to grind a large area of ​​the leaking part of the underwater pipeline to adapt to the pipe clamp mechanical seal method.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of this invention is to overcome the problem that traditional mechanical sealing methods using pipe clamps are difficult to guarantee the sealing performance of underwater pipelines after repair and are not suitable for underwater pipeline leak sealing operations, and to provide a submarine pipeline leak sealing device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A leak sealing device for a subsea pipeline includes: a pair of ring ribs, a sealing plate, and a positioning plate. Each pair of ring ribs is composed of a pair of hinged semicircular rings, which are closed and fitted onto the outside of the pipeline. The hinge axes of the two ring ribs are connected as a single unit by a connecting rod. Both ends of each ring rib extend radially outward to form straight segments. The sealing plate is placed transversely between the two ring ribs, and its side is provided with a wing plate to overlap the side of the sealing plate onto the ring rib. When the clamp is on the outside of the pipe, the sealing surface of the sealing plate contacts the outer wall of the pipe, and the wing plate and the ring reinforcement are spaced apart. By squeezing the wing plate, the sealing surface of the sealing plate is made to fit tightly against the leak in the pipe. The two ends of the positioning plate are respectively hinged to the straight segments of the two ring reinforcements, so that by rotating the positioning plate, the straight segments of the two ring reinforcements in the closed state are gathered together. The positioning plate is threaded with a set screw, so that by rotating the set screw, its head end is pressed against the two adjacent straight segments.

[0008] In the subsea pipeline leak sealing device described above, preferably, the inner surface of the sealing plate is arc-shaped to adapt to the pipeline shape.

[0009] Preferably, the outer ring of the rib has a positioning post protruding vertically in the radial direction;

[0010] The wing plate is fitted over the outside of the positioning post.

[0011] Preferably, the external thread of the positioning post is fitted with a fastening nut, so that rotating the fastening nut compresses the wing plate to make the sealing plate fit tightly against the leak in the pipeline.

[0012] Preferably, a rubber sealing gasket is adhered to the sealing surface of the sealing plate.

[0013] Preferably, the sealing plate and the wing plate are integrally T-shaped;

[0014] The positioning plate is U-shaped;

[0015] The positioning plate has a cylindrical column protruding from the outer surface of the middle plate to thread the set screw inside the cylindrical column.

[0016] Preferably, a steel wire is threaded through the inside of the ring rib;

[0017] The two ends of the steel wire are exposed from the two ends of the ring reinforcement.

[0018] Preferably, the ends of the two ring ribs are connected as one unit by a constriction cap.

[0019] Preferably, both ends of the gathering cover are provided with gathering grooves;

[0020] The gathering groove can accommodate both ends of the ring rib.

[0021] Preferably, the gathering groove is provided with through holes for the two ends of the steel wire to pass through;

[0022] The two ends of the steel wire pass through the through hole and are then wrapped together to secure the gathering cap.

[0023] Beneficial effects: This utility model is applicable to sealing leaks in underwater pipelines, providing precise sealing of leaks without being affected by impurities adhering to the outer wall of the underwater pipeline. It has excellent performance. Compared with traditional pipe clamp mechanical sealing methods, this utility model greatly reduces the area of ​​the outer wall of the pipeline to be ground, saves operation time, shortens the time that maintenance personnel spend underwater, ensures safe operation, and guarantees the personal safety of maintenance personnel. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0025] Figure 1 This is a schematic diagram illustrating the practical application of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 3 This is a front sectional view of the present invention;

[0028] Figure 4 for Figure 2 Another perspective illustration;

[0029] Figure 5 This is a schematic diagram of the overall structure of the retractable cover of this utility model;

[0030] Figure 6 This is a schematic diagram of the overall structure of the ring reinforcement of this utility model;

[0031] Figure 7 This is a schematic diagram of the overall structure of the sealing plate of this utility model.

[0032] In the diagram: 1. Ring rib; 2. Connecting rod; 3. Straight section; 4. Sealing plate; 5. Wing plate; 6. Positioning plate; 7. Top screw; 8. Positioning pin; 9. Fastening nut; 10. Rubber sealing gasket; 11. Cylindrical column; 12. Steel wire strip; 13. Gathering cap; 14. Gathering groove; 15. Through hole. Detailed Implementation

[0033] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0034] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0036] This embodiment aims to provide a subsea pipeline leakage sealing device, whose main function is to effectively seal leaks in subsea pipelines. It is simple to operate, quick to use, effectively shortens the underwater operation time of maintenance personnel, and ensures their personal safety.

[0037] Reference Figure 1 and Figure 2 It includes: a pair of ring bars 1, a sealing plate 4 and a positioning plate 6. Each pair of ring bars 1 is composed of a pair of semi-circular rings hinged together, so that the ring bars 1 can open and close to fit around the outside of the pipe. Since the contact area between the ring bars 1 and the pipe is small, it only plays a positioning role and will not affect the sealing effect. The hinge shafts of the two ring bars 1 are connected as one unit by a connecting rod 2, and both ends of the ring bars 1 extend outward radially to form straight segments 3.

[0038] Reference Figure 1-7The sealing plate 4 is horizontally placed between two ring ribs 1. The inner surface of the sealing plate 4 is arc-shaped to adapt to the shape of the pipe. Both sides of the sealing plate 4 have horizontally extending flanges 5, so that the left and right sides of the sealing plate 4 can overlap the ring ribs 1. The sealing plate 4 and the flanges 5 are T-shaped as a whole. Specifically, there are two or more positioning posts 8 that protrude vertically in the radial direction from the outer ring of one of the semicircular rings of the ring rib 1. The positioning posts 8 are threaded posts. The flanges 5 on the left and right sides of the sealing plate 4 are correspondingly fitted outside the positioning posts 8. When the ring rib 1 is fitted outside the pipe, the sealing surface of the sealing plate 4 contacts the outer wall of the pipe. The flanges 5 and the ring rib 1 are spaced apart, that is, the thickness of the flanges 5 is less than that of the sealing plate 4. The external threads of the positioning posts 8 are fitted with fastening nuts 9. By rotating the fastening nuts 9, the flanges 5 are squeezed to make the sealing plate 4 fit tightly with the leak in the pipe. The sealing surface of the sealing plate 4 is adhered with a rubber sealing gasket 10 to ensure the sealing of the leak in the pipe.

[0039] Reference Figure 1-3 The two ends of the positioning plate 6 are respectively hinged to the straight segments 3 of the two ring ribs 1. The positioning plate 6 is rotated to surround the straight segments 3 of the two ring ribs 1 in the closed state. The positioning plate 6 is U-shaped and has a set screw 7 threaded on it. The set screw 7 is rotated so that its head end presses against the two adjacent straight segments 3. A cylindrical column 11 is protruding on the outer surface of the middle plate of the positioning plate 6 so that the set screw 7 is threaded into the inside of the cylindrical column 11. In this state, there is a gap between the middle plate of the positioning plate 6 and the straight segments 3 of the ring ribs 1 to avoid hindering the rotation of the positioning plate 6.

[0040] In this embodiment, a steel wire 12 is threaded through the inside of the ring rib 1, with both ends of the steel wire 12 protruding from both ends of the ring rib 1. The ends of the two ring ribs 1 are connected as one unit by a gathering cap 13. Specifically, both ends of the gathering cap 13 are provided with gathering grooves 14, which can simultaneously accommodate both ends of the ring rib 1. The gathering groove 14 is provided with through holes 15 for the two ends of the steel wire 12 to pass through, so that the two ends of the steel wire 12 can be wound together after passing through the through holes 15 to secure the gathering cap 13. At the same time, it can also work together with the top screw 7 to tighten the ring rib 1, enhancing the stability of the ring rib 1 when it is fitted outside the pipe.

[0041] During actual installation, first grind around the leak point of the pipeline to remove impurities. Then, put the ring rib 1 on the pipeline and align the sealing plate 4 with the leak point. Next, rotate the positioning plate 6 to the correct position and use the set screw 7 to tighten the straight sections 3 at both ends of the ring rib 1 so that the ring rib 1 can be clamped onto the pipeline. Then, install the tightening cap 13 so that the two ends of the ring rib 1 are inserted into the tightening groove 14 of the tightening cap 13. During this process, the end of the steel wire 12 is passed through the through hole 15 in the tightening groove 14. Finally, twist the exposed ends of the steel wire 12 together into a twist shape to secure the tightening cap 13. This also works with the set screw 7 to tighten the ring rib 1.

[0042] The sealing device provided in this embodiment is suitable for sealing leaks in subsea pipelines. It accurately seals leaks in the pipeline and is not affected by impurities adhering to the outer wall of the underwater pipeline. It has excellent performance. Compared with the traditional pipe clamp mechanical seal method, this device greatly reduces the area of ​​the outer wall of the pipeline to be ground, saves operation time, shortens the time that maintenance personnel stay underwater, ensures safe operation, and guarantees the personal safety of maintenance personnel.

[0043] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A device for sealing leaks in subsea pipelines, characterized in that, include: A pair of ring bars, each consisting of a pair of semi-circular rings hinged together, are closed and fitted around the outside of the pipe by the ring bars. The hinge axes of the two ring bars are connected as one unit by a connecting rod. Both ends of the ring bars extend outward radially to form straight segments. A sealing plate is placed horizontally between two ring reinforcements. The sealing plate has wing plates on its side so that the side of the sealing plate overlaps the ring reinforcements. When the ring reinforcements are fitted around the outside of the pipe, the sealing surface of the sealing plate contacts the outer wall of the pipe. The wing plates are spaced apart from the ring reinforcements. By squeezing the wing plates, the sealing surface of the sealing plate is tightly fitted to the leak in the pipe. The positioning plate is hinged at both ends to the straight segments of the two ring ribs respectively, so that rotating the positioning plate will bring the straight segments of the two ring ribs together in the closed state. The positioning plate is threaded with a set screw, so that rotating the set screw will cause its head end to press against the two adjacent straight segments.

2. The subsea pipeline leak sealing device according to claim 1, characterized in that, The inner surface of the sealing plate is curved to adapt to the shape of the pipeline.

3. The subsea pipeline leak sealing device according to claim 1, characterized in that, The outer ring of the rib has a positioning post protruding vertically in the radial direction; The wing plate is fitted over the outside of the positioning post.

4. The subsea pipeline leak sealing device according to claim 3, characterized in that, The external thread of the positioning post is fitted with a fastening nut, which is rotated to compress the wing plate so that the sealing plate fits tightly against the leak in the pipe.

5. The subsea pipeline leak sealing device according to claim 1, characterized in that, The sealing surface of the sealing plate is adhered with a rubber sealing gasket.

6. The subsea pipeline leak sealing device according to claim 1, characterized in that, The sealing plate and the wing plate are integrally T-shaped; The positioning plate is U-shaped; The positioning plate has a cylindrical column protruding from the outer surface of the middle plate to thread the set screw inside the cylindrical column.

7. The subsea pipeline leak sealing device according to claim 1, characterized in that, The annular reinforcement has steel wires inserted inside it; The two ends of the steel wire are exposed from the two ends of the ring reinforcement.

8. The subsea pipeline leak sealing device according to claim 7, characterized in that, The ends of the two ring ribs are connected as one unit by a constriction cap.

9. The subsea pipeline leakage sealing device according to claim 8, characterized in that, Both ends of the gathering cover are provided with gathering grooves; The gathering groove can accommodate both ends of the ring rib.

10. The subsea pipeline leakage sealing device according to claim 9, characterized in that, The gathering groove is provided with through holes for both ends of the steel wire to pass through; The two ends of the steel wire pass through the through hole and are then wrapped together to secure the gathering cap.

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