A submarine pipeline mud-entry leakage test device applicable to deep-sea scenarios

Abstract

The present invention discloses a subsea pipeline mud-in leakage test device applicable to deep-sea scenarios, which includes a high-pressure pipe body. There are lifting points at both ends of the high-pressure pipe body, an underwater inclination sensor and a high-pressure hose for filling water or gas into the high-pressure pipe body at the middle position. High-pressure sealing flanges are provided at both ends of the high-pressure pipe body, and high-pressure sealing blind plates are provided outside the high-pressure sealing flanges. Depth gauges are respectively provided at positions near both ends on the outside of the high-pressure pipe body. There are leakage points on the side of the high-pressure pipe body, and the leakage points are located at the middle position and one side of the high-pressure pipe body. An exhaust hole is provided at the top on the side of the high-pressure pipe body away from the leakage point, and support legs are provided at the bottom. Deep-water solenoid valves are provided on the high-pressure hose, the exhaust hole and the leakage point. An underwater high-pressure pressure transmitter is provided inside the high-pressure pipe body. The present invention is simple for offshore construction, the underwater information can be monitored onshore, and various pipeline leakage conditions can be simulated, effectively constructing a subsea pipeline leakage scenario.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore oil and gas resource exploitation, and particularly relates to a subsea pipeline mud-in leakage test device applicable to deep-sea scenarios. Background Art

[0002] Oil and gas gathering and transportation is an important part of offshore oil and gas development. Subsea pipelines have become the main form of oil and gas gathering and transportation due to their advantages such as continuity, speed, efficiency, and little influence by climate, and are the "lifeline" of offshore oil and gas production systems. Once a subsea pipeline is damaged, it will cause oil and gas leakage and serious consequences. Not only will the normal production of offshore oil and gas fields be affected, resulting in huge economic losses; more seriously, the oil and gas leakage will cause serious pollution to the marine environment, damage the marine ecosystem, and also have an adverse social impact. And the restoration and management of the marine ecosystem will be very difficult and costly. Therefore, the research on the behavior of subsea pipeline leakage is particularly important.

[0003] Constructing a subsea pipeline leakage scenario using newly laid subsea pipelines is extremely costly; using in-service subsea pipelines cannot guarantee the needs of downstream users. Therefore, there is an urgent need to study a device that is applicable to deep-sea scenarios, easy to construct, and can cause leakage of subsea pipelines under mud. Summary of the Invention

[0004] To solve the above technical problems, the present invention discloses a subsea pipeline mud-in leakage test device applicable to deep-sea scenarios. To achieve the above object, the present invention adopts the following technical solutions:

[0005] A subsea pipeline mud-in leakage test device applicable to deep-sea scenarios includes a high-pressure pipe body. Both ends of the high-pressure pipe body are provided with lifting points, and an underwater inclination sensor and a high-pressure hose for filling water or gas into the high-pressure pipe body are provided at the middle position. High-pressure sealing flanges are provided at both ends of the high-pressure pipe body, and high-pressure sealing blind plates are provided outside the high-pressure sealing flanges. Depth gauges are respectively provided at positions close to both ends on the outside of the high-pressure pipe body. Leak points are provided on the side of the high-pressure pipe body, and the leak points are provided at the middle position and one side of the high-pressure pipe body. An exhaust hole is provided at the top on the side of the high-pressure pipe body away from the leak point, and support legs are provided at the bottom. Deep-water solenoid valves are provided on the high-pressure hose, exhaust hole, and leak point, and an underwater high-pressure pressure transmitter is provided inside the high-pressure pipe body.

[0006] As an improvement, a circumferential high-pressure jet pipe is provided outside the sealing blind plate on one side of the high-pressure pipe body. One end of the circumferential high-pressure jet pipe passes through the high-pressure sealing blind plate and penetrates into the high-pressure pipe body, and the other end surrounds downward outside the blind plate. Deep-water solenoid valves and jet holes are provided on the high-pressure jet pipe.

[0007] As an improvement, the leakage points are arranged at the middle position of the high-pressure pipe body and near the circumferential high-pressure jet pipe. The leakage points include downward leakage points, lateral leakage points and upward leakage points, which are respectively arranged at the bottom, side and top of the high-pressure pipe body.

[0008] As an improvement, a hose collecting box is provided at the connection between the high-pressure hose and the high-pressure pipe body.

[0009] As an improvement, the test device is provided with cables for supplying power to the deep-water solenoid valve and the underwater high-pressure pressure transmitter, and a cable collecting box for collecting cables is provided at the middle position of the top of the high-pressure pipe body.

[0010] As an improvement, the support legs are telescopic inclined support legs.

[0011] As an improvement, the test device is connected by a plurality of high-pressure pipe bodies, and the adjacent high-pressure pipe bodies are fixedly connected by high-pressure sealing flanges.

[0012] As an improvement, the test device is made of stainless steel.

[0013] The present invention has the following advantages:

[0014] The present invention is simple for offshore construction, the underwater information can be monitored on shore, the simulation of pipeline leakage conditions is diverse, and the leakage scenario of the submarine pipeline can be effectively constructed. Description of the Drawings

[0015] Figure 1 It is a structural diagram of a submarine pipeline mud-in leakage test device applicable to deep-sea scenarios in Embodiment 1;

[0016] Figure 2 It is a structural diagram of a circumferential high-pressure jet pipe in a submarine pipeline mud-in leakage test device applicable to deep-sea scenarios in Embodiment 1;

[0017] Figure 3 It is a working principle diagram of a submarine pipeline mud-in leakage test device applicable to deep-sea scenarios in Embodiment 1;

[0018] Figure 4 It is a structural diagram of a submarine pipeline mud-in leakage test device applicable to deep-sea scenarios in Embodiment 2.

[0019] The labels in the figure are:

[0020] 1 - High - pressure pipe body, 11 - Hanging point, 12 - Underwater inclination sensor, 13 - High - pressure sealing flange, 14 - High - pressure sealing blind plate, 15 - Exhaust hole, 16 - Support leg, 17 - Underwater high - pressure pressure transmitter, 2 - High - pressure hose, 21 - Hose collection box, 3 - Depth gauge, 4 - Circumferential high - pressure jet pipe, 41 - Jet hole, 5 - Deep - water solenoid valve, 6 - Leak point, 61 - Downward leakage, 62 - Lateral leakage, 63 - Upward leak point, 7 - Cable, 71 - Cable collection box, 8 - Ship, 81 - Crane, 82 - Suspension rope, 83 - Water surface, 84 - Seabed mud surface. Detailed implementation manners

[0021] The present invention will be introduced in detail and specifically through specific embodiments below to better understand the present invention. However, the following embodiments do not limit the protection scope of the present invention.

[0022] Embodiment 1

[0023] This embodiment discloses a submarine pipeline mud - penetration leakage test device applicable to deep - sea scenarios, including a high - pressure pipe body 1.

[0024] Hanging points 11 are provided at both ends of the high - pressure pipe body 1, and an underwater inclination sensor 12 and a high - pressure hose 2 for filling water or gas into the high - pressure pipe body 1 are provided at the middle position. A hose collection box 21 is provided at the connection between the high - pressure hose 2 and the high - pressure pipe body 1. High - pressure sealing flanges 13 are provided at both ends of the high - pressure pipe body 1, and high - pressure sealing blind plates 14 are provided outside the high - pressure sealing flanges 13. Depth gauges 3 are respectively provided at positions near both ends on the outside of the high - pressure pipe body 1.

[0025] A circumferential high - pressure jet pipe 4 is provided outside the sealing blind plate 13 on one side of the high - pressure pipe body 1. One end of the circumferential high - pressure jet pipe 4 penetrates through the high - pressure sealing blind plate 14 and enters the high - pressure pipe body 1, and the other end surrounds the outside of the high - pressure sealing blind plate 14 downward. Deep - water solenoid valves 5 and jet holes 41 are provided on the high - pressure jet pipe 4.

[0026] Leak points 6 are provided on the side of the high - pressure pipe body 1, and the leak points 6 are provided at the middle position of the high - pressure pipe body 1 and near the circumferential high - pressure jet pipe 4. The leak points 6 include a downward leak point 61, a lateral leak point 62, and an upward leak point 63, which are respectively provided at the bottom, side, and top of the high - pressure pipe body 1.

[0027] An exhaust hole 15 is provided at the top on the side of the high - pressure pipe body 1 far from the leak point 6, and a support leg 16 is provided at the bottom. The support leg 16 is a telescopic inclined support leg. Deep - water solenoid valves 5 are provided on the high - pressure hose 2, the exhaust hole 15, and the leak point 6, and an underwater high - pressure pressure transmitter 17 is provided inside the high - pressure pipe body 1.

[0028] The test device is provided with a cable 7 for supplying power to the underwater inclination sensor 12, the deep - water solenoid valve 5, and the underwater high - pressure pressure transmitter 17. At the middle position on the top of the high - pressure pipe body 1, there is a cable collecting box 71 for collecting cables. The main body of the test device is made of stainless steel material.

[0029] When this embodiment is in use, the circumferential high - pressure jet pipe 4 is arranged to incline downward, and the inclination angle and the length of the support leg 16 can be set. Then, the device is placed on the seabed by a ship's crane. During the placement process, the attitude of the pipe body in water is judged by the water depth gauge 3 and the underwater inclination sensor 12.

[0030] After the attitude of the pipe body is stable, the deep - water solenoid valve 5 at the high - pressure hose 3 is opened, and high - pressure gas is filled into the pipe body. When the reading of the high - pressure pressure transmitter 17 reaches the preset pressure value, the deep - water solenoid valve 5 at the circumferential high - pressure jet pipe 4 is opened, so that the jet holes 41 jet high - pressure gas, thereby causing the head end of the high - pressure pipe body 1 to sink. During the sinking process, the values of the pipe body attitude, depth, internal pressure, etc. are observed, and the mud - entry depth of the mud - entry leak point is comprehensively judged.

[0031] When the seabed mud is hard, the jet medium can be changed to water. The specific method is to open the deep - water solenoid valve 5 at the exhaust hole 15 to empty the pressure in the high - pressure pipe body 1 to the external water pressure. The high - pressure hose 2 on the ship is connected to a water pump, and tap water on the ship is injected into the high - pressure pipe body 1. When there are no more bubbles emerging from the exhaust hole 15 on the water surface, it means that the high - pressure pipe body 1 is full of water. Close the deep - water solenoid valve 5 at the exhaust hole 15 and the deep - water solenoid valve 5 at the high - pressure hose 2. Empty the high - pressure hose 2 section on the ship and connect it to a high - pressure gas tank. By opening the deep - water solenoid valve 5 at the high - pressure hose 2 and observing the pressure reading of the high - pressure pipe body 1, when the set pressure value is reached, open the deep - water solenoid valve 5 at the circumferential high - pressure jet pipe 4, and the jet holes 41 eject high - pressure water columns to wash away the hard soil at the lower side of the head end of the high - pressure pipe body 1, prompting the leak point to reach the predetermined depth. After the head end of the high - pressure pipe body 1 enters the mud, the situation of leakage under the mud can be simulated.

[0032] When the mud - entry depth is reached, the leakage scenarios of the submarine pipeline, including leakage under the mud, leakage above the mud, and lateral leakage, can be simulated through three leakage points: the lateral leakage point 62, the downward leakage point 61, and the downward leakage point 63. By adjusting the pressure value in the high - pressure pipe body 1 through the exhaust hole 15, the leakage under different pressure values (10 Mpa - 0.1 Mpa) can be simulated. By replacing the leakage point 6, the leakage scenarios with different shapes of the leakage point 6 and different diameters of the leakage holes can be simulated.

[0033] Embodiment 2

[0034] This embodiment discloses a test device for the mud - entry leakage of submarine pipelines applicable to deep - sea scenarios.

[0035] In this embodiment, the test device is formed by connecting a plurality of high-pressure pipe bodies 1, and the adjacent high-pressure pipe bodies 1 are fixedly connected through high-pressure sealing flanges 13. The other structures of this embodiment are the same as those of Embodiment 1.

[0036] The specific embodiments of the present invention have been described in detail above, but they are only examples, and the present invention is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions made to the present invention are also within the scope of the present invention. Therefore, all equivalent transformations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A submarine pipeline mud entry leakage test device applicable to deep - sea scenarios, characterized in that, It includes a high-pressure pipe body. There are lifting points at both ends of the high-pressure pipe body, an underwater inclination sensor and a high-pressure hose for filling water or gas into the high-pressure pipe body at the middle position. There are high-pressure sealing flanges at both ends of the high-pressure pipe body, and high-pressure sealing blind plates are arranged outside the high-pressure sealing flanges. Depth gauges are respectively arranged at positions close to both ends on the outside of the high-pressure pipe body. There is a leak point on the side of the high-pressure pipe body, and the leak point is located at the middle position and one side of the high-pressure pipe body. There is an exhaust hole at the top of the high-pressure pipe body on the side away from the leak point, and support legs are arranged at the bottom. Deep-water solenoid valves are arranged on the high-pressure hose, exhaust hole and leak point. An underwater high-pressure pressure transmitter is arranged inside the high-pressure pipe body; There is a circumferential high-pressure jet pipe outside the sealing blind plate on one side of the high-pressure pipe body. One end of the circumferential high-pressure jet pipe passes through the high-pressure sealing blind plate and penetrates into the high-pressure pipe body, and the other end surrounds downward outside the high-pressure sealing blind plate. Deep-water solenoid valves and jet holes are arranged on the high-pressure jet pipe. By opening the deep-water solenoid valve at the circumferential high-pressure jet pipe, the jet holes spray high-pressure gas, which can make the head end of the high-pressure pipe body sink.

2. The submarine pipeline mud entry leakage test device applicable to deep - sea scenarios according to claim 1, wherein, The leak point is located at the middle position of the high-pressure pipe body and close to the circumferential high-pressure jet pipe. The leak point includes a downward leak point, a lateral leak point and an upward leak point, which are respectively arranged at the bottom, side and top of the high-pressure pipe body.

3. The seabed pipeline mud entry leakage test device applicable to deep - sea scenarios according to claim 1, wherein, A hose collecting box is arranged at the connection between the high-pressure hose and the high-pressure pipe body.

4. The submarine pipeline mud entry leakage test device applicable to deep-sea scenarios according to claim 1, wherein The test device is provided with cables for supplying power to the deep-water solenoid valves and the underwater high-pressure pressure transmitter. A cable collecting box for collecting cables is arranged at the middle position of the top of the high-pressure pipe body.

5. The submarine pipeline mud entry leakage test device applicable to deep - sea scenarios according to claim 1, wherein, The support legs are telescopic inclined support legs.

6. The submarine pipeline mud entry leakage test device applicable to deep - sea scenarios according to claim 1, characterized in that, The test device is connected by multiple high-pressure pipe bodies, and adjacent high-pressure pipe bodies are fixedly connected through high-pressure sealing flanges.

7. A submarine pipeline mud entry leakage test device applicable to deep - sea scenarios according to claim 1, characterized in that, The test device is made of stainless steel.

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