Anti-leakage double-layer subsea pipeline plugging device

Abstract

The utility model discloses an anti-leakage double-layer subsea pipeline plugging device, and particularly relates to the technical field of subsea pipeline plugging, the anti-leakage double-layer subsea pipeline plugging device comprises a double-layer subsea pipeline, a sealing mechanism for plugging the double-layer subsea pipeline is arranged on one side of the double-layer subsea pipeline, and the sealing mechanism comprises a sealing plate arranged on one side of the double-layer subsea pipeline. A first rubber ring is arranged on one side of the sealing plate, a second rubber ring is arranged in the first rubber ring, inserting rods are arranged on one side of the first rubber ring and one side of the second rubber ring, one ends of the inserting rods penetrate through the sealing plate and extend out of one side of the double-layer subsea pipeline, and three supporting frames are fixedly arranged on one side of the sealing plate. A first threaded hole is formed in the supporting frame. The pipeline can be plugged through the sealing mechanism, the situation that residual oil leaks and pollutes the environment is avoided, the rubber pad can be taken down from the mounting plate through the dismounting mechanism, replacement of the rubber pad is facilitated, and the service life of the pipeline plugging device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of subsea pipeline plugging technology, specifically to a leak-proof double-layer subsea pipeline plugging device. Background Technology

[0002] In marine engineering, subsea pipelines are mainly used for the transport of oil, gas, water, or chemicals between offshore oil and gas platforms, and between platforms and subsea production trees. Some oilfields, due to design requirements for heat-insulated oil and gas transport, have selected subsea pipelines with double-layer structures. Due to secondary development or abandonment of oilfields, some old subsea pipelines need to be cut and dismantled, with some sections temporarily abandoned on the seabed. To prevent residual oil leakage from the cut double-layer subsea pipelines and environmental pollution, the temporarily abandoned pipelines need to be sealed.

[0003] For example, a pipe sealing device provided in Chinese patent application number 202223546263.1 involves moving the sealing seat towards the pipe end, rotating the bidirectional threaded rod to cause the two moving plates and the arc-shaped plate to move relative to each other, clamping them onto the outer surface of the pipe for fixation, and then activating the electric push rod to push the fixing block into the pipe, thereby gradually pushing the sealing sleeve to the inner wall of the pipe and gradually making it tightly fit against the inner wall of the pipe to seal the pipe end. After maintenance, the electric push rod is activated again to pull the fixing block back to its original position, causing the sealing sleeve and sealing ring to leave the pipe. Then, the bidirectional threaded rod is rotated in the opposite direction to drive the arc-shaped plates to move in opposite directions, allowing the sealing seat to be removed, thus achieving the effect of easy disassembly, simple operation, and saving time.

[0004] However, the following problems still exist in this technical solution: the sealing ring and sealing sleeve are fixed on the fixing block. When the sealing ring and sealing sleeve are damaged, they cannot be disassembled, which makes it impossible to seal the subsea pipeline. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof double-layer subsea pipeline sealing device. The sealing mechanism can seal the pipeline to prevent residual oil leakage and environmental pollution. The disassembly mechanism allows the rubber gasket to be removed from the mounting plate for easy replacement, thus extending the service life of this invention and solving the above-mentioned shortcomings in the technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof double-layer subsea pipeline sealing device, comprising a double-layer subsea pipeline, wherein a sealing mechanism for sealing the double-layer subsea pipeline is provided on one side of the double-layer subsea pipeline.

[0007] Preferably, the sealing mechanism includes a sealing plate disposed on one side of the double-layer subsea pipeline. A first rubber ring is disposed on one side of the sealing plate, and a second rubber ring is disposed inside the first rubber ring. A plug rod is disposed on one side of both the first and second rubber rings. One end of the plug rod passes through the sealing plate and extends out of one side of the double-layer subsea pipeline. Three support frames are fixedly disposed on one side of the sealing plate. A first threaded hole is opened on the support frame, and a second threaded hole is opened on the plug rod. A first bolt is threadedly connected inside the connected first and second threaded holes for sealing the double-layer subsea pipeline.

[0008] Preferably, the double-layer subsea pipeline is provided with an installation mechanism for fixing the sealing mechanism to the double-layer subsea pipeline. The installation mechanism includes two mounting plates respectively provided on both sides of the double-layer subsea pipeline. Each of the two mounting plates is provided with a rubber pad. Two connecting plates are fixed on both sides of the mounting plates. Each connecting plate is provided with a third threaded hole. The two connected third threaded holes are threaded with the same second bolt for fixing the sealing mechanism to the double-layer subsea pipeline.

[0009] Preferably, the mounting plate is provided with a disassembly mechanism for easy removal of the rubber pad. The disassembly mechanism includes multiple fourth threaded holes on the mounting plate and multiple fifth threaded holes on the rubber pad. The fourth and fifth threaded holes are connected internally by the same third bolt for easy removal of the rubber pad.

[0010] Preferably, the sealing plate is provided with a connecting mechanism for fixing the sealing mechanism to the mounting plate. The connecting mechanism includes multiple support plates provided on the sealing plate. Each support plate is provided with a sixth threaded hole. The mounting plate is provided with two seventh threaded holes. The sixth and seventh threaded holes are connected internally by the same fourth bolt for fixing the sealing mechanism to the mounting plate.

[0011] Preferably, two handles are fixedly provided on one side of the sealing plate, and a connecting ring is fixedly provided on one side of the mounting plate, for convenient handling of this utility model.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0013] 1. When the first rubber ring and the second rubber ring are damaged, rotate the first bolt to turn it out of the second threaded hole and the inside of the first threaded hole, and then pull the first rubber ring and the second rubber ring to remove them from the sealing plate for easy replacement and to extend the service life of this utility model.

[0014] 2. When the rubber pad is damaged, turn the third bolt to unscrew it from the fifth and fourth threaded holes, and then pull the rubber pad to remove it from the mounting plate for easy replacement, thus extending the service life of this utility model. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model in use;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is a front view of the present invention;

[0019] Figure 4 This is a schematic diagram of the sealing mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the installation mechanism of this utility model;

[0021] Figure 6 This is a schematic diagram of the connection mechanism of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Double-layer subsea pipeline;

[0024] 2 sealing mechanism, 201 sealing plate, 202 first rubber ring, 203 second rubber ring, 204 plug rod, 205 support frame, 206 first threaded hole, 207 second threaded hole, 208 first bolt;

[0025] 3. Mounting mechanism, 301. Mounting plate, 302. Rubber pad, 303. Connecting plate, 304. Third threaded hole, 305. Second bolt;

[0026] 4. Disassembly mechanism; 401. Fourth threaded hole; 402. Fifth threaded hole; 403. Third bolt;

[0027] 5. Connecting mechanism, 501. Support plate, 502. Sixth threaded hole, 503. Seventh threaded hole, 504. Fourth bolt;

[0028] 6 connecting rings, 7 handles. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] This utility model provides, for example Figure 1-6 The above describes a leak-proof double-layer subsea pipeline sealing device, which includes a double-layer subsea pipeline 1 and a sealing mechanism 2 for sealing the double-layer subsea pipeline 1 on one side.

[0031] like Figure 5 As shown, the double-layer subsea pipeline 1 is provided with an installation mechanism 3 for fixing the sealing mechanism 2 to the double-layer subsea pipeline 1. The installation mechanism 3 includes two installation plates 301 respectively provided on both sides of the double-layer subsea pipeline 1. Each of the two installation plates 301 is provided with a rubber pad 302. Two connecting plates 303 are fixedly provided on both sides of the installation plate 301. Each connecting plate 303 is provided with a third threaded hole 304. The two connected third threaded holes 304 are threadedly connected with the same second bolt 305. A connecting ring 6 is fixedly provided on one side of the installation plate 301.

[0032] Connect the external rope to the connecting ring 6, and place the mounting plate 301 on one side of the double-layer subsea pipeline 1 through the rope. Then rotate the second bolt 305 to rotate the second bolt 305 into the connecting plate 303, and use the second bolt 305 to fix the two mounting plates 301 to both sides of the double-layer subsea pipeline 1.

[0033] like Figure 4 As shown, the sealing mechanism 2 includes a sealing plate 201 disposed on one side of the double-layer subsea pipeline 1. A first rubber ring 202 is provided on one side of the sealing plate 201. A second rubber ring 203 is provided inside the first rubber ring 202. A plug-in rod 204 is provided on one side of both the first rubber ring 202 and the second rubber ring 203. One end of the plug-in rod 204 passes through the sealing plate 201 and extends out of one side of the double-layer subsea pipeline 1. Three support frames 205 are fixedly provided on one side of the sealing plate 201. A first threaded hole 206 is opened on the support frame 205. A second threaded hole 207 is opened on the plug-in rod 204. A first bolt 208 is threadedly connected inside the connected first threaded hole 206 and second threaded hole 207. Two handles 7 are fixedly provided on one side of the sealing plate 201.

[0034] like Figure 6As shown, the sealing plate 201 is provided with a connecting mechanism 5 for fixing the sealing mechanism 2 to the mounting plate 301. The connecting mechanism 5 includes a plurality of support plates 501 provided on the sealing plate 201. Each support plate 501 is provided with a sixth threaded hole 502. The mounting plate 301 is provided with two seventh threaded holes 503. The sixth threaded hole 502 and the seventh threaded hole 503 are connected by the same fourth bolt 504.

[0035] Pull the handle 7 to move the sealing plate 201 to one end of the double-layer subsea pipeline 1. Insert the first rubber ring 202 and the second rubber ring 203 into the double-layer subsea pipeline 1 respectively. Use the first rubber ring 202 and the second rubber ring 203 to seal the inside of the double-layer subsea pipeline 1 to prevent residual oil leakage and environmental pollution. Turn the fourth bolt 504 to the seventh threaded hole 503 and the sixth threaded hole 502. Use the fourth bolt 504 to fix the sealing plate 201 on the mounting plate 301 to prevent the sealing plate 201 from shaking.

[0036] like Figure 5 As shown, the mounting plate 301 is provided with a disassembly mechanism 4 for convenient disassembly of the rubber pad 302. The disassembly mechanism 4 includes a plurality of fourth threaded holes 401 opened on the mounting plate 301, and a plurality of fifth threaded holes 402 opened on the rubber pad 302. The fourth threaded holes 401 and the fifth threaded holes 402 are connected by the same third bolt 403.

[0037] When the rubber pad 302 is damaged, rotate the third bolt 403 to turn it out from the fifth threaded hole 402 and the fourth threaded hole 401, and then pull the rubber pad 302 to remove it from the mounting plate 301 for easy replacement and to extend the service life of this utility model.

[0038] When the first rubber ring 202 and the second rubber ring 203 are damaged, rotate the first bolt 208 to unscrew it from the second threaded hole 207 and the first threaded hole 206, and then pull the first rubber ring 202 and the second rubber ring 203 to remove them from the sealing plate 201 for easy replacement and to extend the service life of this utility model.

[0039] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A leak-proof double-layer subsea pipeline sealing device, comprising a double-layer subsea pipeline (1), characterized in that: The double-layer subsea pipeline (1) is provided with a sealing mechanism (2) on one side to seal the double-layer subsea pipeline (1); The sealing mechanism (2) includes a sealing plate (201) disposed on one side of the double-layer subsea pipeline (1). A first rubber ring (202) is provided on one side of the sealing plate (201). A second rubber ring (203) is provided inside the first rubber ring (202). A plug rod (204) is provided on one side of both the first rubber ring (202) and the second rubber ring (203). One end of the plug rod (204) passes through the sealing plate (201) and extends out of one side of the double-layer subsea pipeline (1). Three support frames (205) are fixedly provided on one side of the sealing plate (201). A first threaded hole (206) is opened on the support frame (205). A second threaded hole (207) is opened on the plug rod (204). A first bolt (208) is threadedly connected inside the connected first threaded hole (206) and second threaded hole (207).

2. The leak-proof double-layer subsea pipeline plugging device according to claim 1, characterized in that: The double-layer subsea pipeline (1) is provided with an installation mechanism (3) for fixing the sealing mechanism (2) to the double-layer subsea pipeline (1); The installation mechanism (3) includes two mounting plates (301) respectively located on both sides of the double-layer subsea pipeline (1). Each of the two mounting plates (301) is provided with a rubber pad (302). Two connecting plates (303) are fixedly provided on both sides of the mounting plate (301). Each connecting plate (303) is provided with a third threaded hole (304). The two connected third threaded holes (304) are threaded with the same second bolt (305).

3. The leak-proof double-layer subsea pipeline plugging device according to claim 2, characterized in that: The mounting plate (301) is provided with a disassembly mechanism (4) for easy disassembly of the rubber pad (302); The disassembly mechanism (4) includes a plurality of fourth threaded holes (401) on the mounting plate (301), and a plurality of fifth threaded holes (402) on the rubber pad (302). The fourth threaded holes (401) and the fifth threaded holes (402) that are connected to each other are internally threaded with the same third bolt (403).

4. The leak-proof double-layer subsea pipeline plugging device according to claim 2, characterized in that: The sealing plate (201) is provided with a connecting mechanism (5) for fixing the sealing mechanism (2) to the mounting plate (301); The connecting mechanism (5) includes multiple support plates (501) provided on the sealing plate (201). Each support plate (501) is provided with a sixth threaded hole (502). The mounting plate (301) is provided with two seventh threaded holes (503). The sixth threaded hole (502) and the seventh threaded hole (503) that are connected to each other are internally threaded with the same fourth bolt (504).

5. The leak-proof double-layer subsea pipeline plugging device according to claim 1, characterized in that: Two handles (7) are fixedly provided on one side of the sealing plate (201).

6. The leak-proof double-layer subsea pipeline plugging device according to claim 2, characterized in that: A connecting ring (6) is fixedly provided on one side of the mounting plate (301).

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