阅读说明：本技术 一种海底管道铺设时防进海水的方法 (Method for preventing seawater from entering during laying of submarine pipeline ) 是由 于文太 赵福臣 李翔 王伟 李静 郑申奎 燕晖 王海龙 党博 李治 于 2021-10-21 设计创作，主要内容包括：本发明公开了一种海底管道铺设时防进海水的方法,在海管铺设时,起始海管和终止海管的端口处,分别安装收球装置和发球装置,发球装置发出球A和球B,分别封堵于起始海管和终止海管的端口处,并在海管内部充入淡水,能够防止海水进入海管内,对海管进行腐蚀,降低了经济损失。(The invention discloses a method for preventing seawater from entering during the laying of a submarine pipeline, wherein when a submarine pipeline is laid, a ball collecting device and a ball serving device are respectively installed at the port parts of a starting submarine pipeline and a stopping submarine pipeline, the ball serving device serves a ball A and a ball B which are respectively blocked at the port parts of the starting submarine pipeline and the stopping submarine pipeline, and fresh water is filled in the submarine pipeline, so that the seawater can be prevented from entering the submarine pipeline to corrode the submarine pipeline, and the economic loss is reduced.)

1. A method for preventing seawater from entering during laying of submarine pipelines is realized by the following steps, and is characterized in that:

(1) installing a ball collecting device at the port of the initial sea pipe, and carrying out backpressure test on a flange at the joint of the ball collecting device and the initial sea pipe;

(2) installing a ball serving device at the port of the termination sea pipe, and carrying out back pressure test on a flange at the joint of the ball serving device and the termination sea pipe;

(3) after all the sea pipes are coated with mud, the ball serving device sends out a ball A blocked at the port of the starting sea pipe, the ball A is blocked at the port of the starting sea pipe, and fresh water is filled into the whole pipeline;

(4) the ball B is sent out by the ball sending device, the ball B is blocked at the port of the sea pipe, and the ball sending device and the ball receiving device are removed, so that the submarine pipeline can be prevented from entering the seawater when being laid.

2. The method for preventing seawater inflow during the laying of a submarine pipeline according to claim 1, wherein: in the step (1) and the step (2), the backpressure test is completed by a self-pressure test system, and the self-pressure test system comprises a hose, a connector, a pressure gauge and a pressurizing pump.

3. The method for preventing seawater inflow during the laying of a submarine pipeline according to claim 1, wherein: ball a and ball B are interference fit at the end of the starting and ending marine pipes.

4. The method for preventing seawater inflow during the laying of a submarine pipeline according to claim 1, wherein: and positioning devices are arranged on the ball A and the ball B.

Technical Field

The invention relates to a method for preventing seawater from entering during laying of a submarine pipeline.

Background

After the marine pipe is laid, the two ends of the marine pipe are subjected to installation measurement of expansion bends, so that the seal heads at the two ends of the marine pipe are required to be removed, seawater can enter the marine pipe when the seal heads are removed, and the seawater entering the marine pipe can corrode the marine pipe due to high content of various salts in the seawater, so that great economic loss is caused.

Disclosure of Invention

The invention provides a method for preventing seawater from entering during laying of a submarine pipeline, which can prevent seawater from entering a sea pipe to corrode the sea pipe during laying of the sea pipe.

In order to solve the technical problem, the invention provides a method for preventing seawater from entering during laying of a submarine pipeline, which is realized by the following steps:

(1) installing a ball collecting device at the port of the initial sea pipe, and carrying out backpressure test on a flange at the joint of the ball collecting device and the initial sea pipe;

(2) installing a ball serving device at the port of the termination sea pipe, and carrying out back pressure test on a flange at the joint of the ball serving device and the termination sea pipe;

(3) after all the sea pipes are coated with mud, the ball serving device sends out a ball A blocked at the port of the starting sea pipe, the ball A is blocked at the port of the starting sea pipe, and fresh water is filled into the whole pipeline;

(4) the ball B is sent out by the ball sending device, the ball B is blocked at the port of the sea pipe, and the ball sending device and the ball receiving device are removed, so that the submarine pipeline can be prevented from entering the seawater when being laid.

Further, in the step (1) and the step (2), the backpressure test is completed by a self-pressure test system, and the self-pressure test system comprises a hose, a connector, a pressure gauge and a pressurizing pump.

Further, ball a and ball B are interference fit at the end of the starting and ending marine pipes.

Furthermore, the ball A and the ball B are provided with positioning devices.

The invention has the technical effects that: (1) when the marine pipe is laid, the port parts of the starting marine pipe and the stopping marine pipe are respectively provided with a ball receiving device and a ball serving device, the ball serving devices serve a ball A and a ball B which are respectively blocked at the port parts of the starting marine pipe and the stopping marine pipe, and fresh water is filled in the marine pipe, so that seawater can be prevented from entering the marine pipe when the marine pipe is installed and expanded, the marine pipe is corroded, and the economic loss is reduced; (2) the back pressure test is carried out on the flanges at the joints of the ball serving device and the ball receiving device and the sea pipe, so that the risk of seawater entering is reduced; (3) the positioning devices are arranged on the ball A and the ball B, so that the positions of the balls can be effectively monitored, and the positions of the ball A and the ball B can be mastered at any time.

Drawings

FIG. 1 is a self-testing system of the present invention;

FIG. 2 is a schematic view of the present invention after ball receiving and launching devices are installed at two ends of the sea pipe;

fig. 3 is a schematic diagram of the present invention after laying of the marine pipeline.

Reference numerals: 1. a self-pressure test system; 11. a hose; 12. a joint; 13. a pressure gauge; 14. a ball valve; 15. a pressurizing pump; 16. a hydraulic oil tank; 2. a ball serving device; 21. a serving end flange; 22. a ball dispensing cylinder; 3. a ball collecting device; 31. a ball-collecting end flange; 32. a ball collecting cylinder; 4. plugging the ball; 5. a sea pipe.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.

The embodiment, as shown in fig. 1 to 3, discloses a method for preventing seawater from entering during submarine pipeline laying, which takes a 316L mechanical composite pipe as an example to specifically describe the implementation steps of the invention, and each step is implemented as follows:

(1) installing a ball receiving device 3 at the port of the starting sea pipe 5, and carrying out backpressure test on a flange at the joint of the ball receiving device 3 and the starting sea pipe 5;

(2) installing a ball serving device 2 at the port of the termination sea pipe 5, and carrying out back pressure test on a flange at the joint of the ball serving device 2 and the termination sea pipe 5;

in step (1) and step (2), the self-pressure testing system 1 comprises a hose 11 and a connector 12, the connector 12 is connected through the hose 11, a pressure gauge 13 is connected in series, a ball valve is arranged between the pressure gauge 13 and a pressurizing pump 15, the oil inlet end of the pressurizing pump 15 is connected with a hydraulic oil tank 16, the oil outlet end of the pressurizing pump 15 is connected with the pressure gauge 13, the pressurizing pump 15 is used for pressurizing a ball sending end flange 21 and a ball receiving end flange 31 before the sea pipe 5 is drained, and therefore the self-pressure testing effect on the flanges is achieved before the drain is verified.

(3) After all the sea pipes 5 are filled with mud, the ball serving device 2 sends out a ball A blocked at the port of the starting sea pipe 5, the ball A is blocked at the port of the starting sea pipe 5, and fresh water is filled into the whole pipeline;

both ball a and ball B are plugging balls 4. After the pipeline is filled with fresh water, the fresh water generates certain pressure on the ball A and the ball B so as to balance the pressure of the external water pressure on the ball A and the ball B after the ball receiving device 3 and the ball serving device 2 are dismantled.

The ball A is pushed by fresh water to reach the position of the ball collecting end flange 31 of the ball collecting cylinder 32 on the ball collecting device 3.

(4) The ball B is sent out by the ball sending device 2, the ball B is blocked at the port of the sea pipe 5, and the ball sending device 2 and the ball receiving device 3 are removed, so that the submarine pipeline can be prevented from entering the seawater when being laid.

The ball collecting device 3 and the ball serving device 2 are provided with a ball collecting barrel 32 and a ball serving barrel 22, and the ball collecting barrel 32 and the ball serving barrel 22 can contain the blocking ball 4.

The ball A and the ball B are in interference fit at the end of the starting sea pipe 5 and the end sea pipe 5, so that the ball A and the ball B can be sealed more tightly and firmly.

Be equipped with positioner on ball A and the ball B, can effectively monitor ball A and ball B, the position of shutoff ball 4 can be mastered at any time to the personnel on the bank.

The invention specifically completes the seawater-entering prevention treatment when the sea pipe 5 is laid by the following steps: (1) before the initial sea pipe 5 enters water, a ball receiving device 3 is installed at the port of the initial sea pipe 5, a back pressure test is carried out on a flange at the joint of the ball receiving device 3 and the initial sea pipe 5, and the sea pipe 5 is laid; (2) before the sea pipe 5 is stopped to enter water, a ball serving device 2 is installed at the port of the sea pipe 5, and back pressure test is carried out on a flange at the joint of the ball serving device 2 and the sea pipe 5; (3) after the sea pipe 5 is completely filled with water and mud, fresh water is filled in the ball serving device 2, and meanwhile, the fresh water pushes the ball A to be blocked at the ball receiving end flange 31; (4) the ball B is sent out by the ball sending device 2, the ball B is blocked at the ball sending end flange 21, and the ball sending device 2 and the ball collecting device 3 are removed, so that the submarine pipeline can be prevented from entering seawater when being laid.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.