Method for placing cement briquettes of submarine pipeline

A technology for cement briquettes and submarine pipelines, which is applied in pipeline laying and maintenance, pipes/pipe joints/fittings, mechanical equipment, etc., and can solve the problem of inability to effectively guide the movement of cement briquettes and the inability to determine the details of cement briquettes and submarine oil pipelines. Location etc.

Active Publication Date: 2015-05-06
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some sea areas, due to the low underwater visibility, the video electronic eyes of underwater robots have become night blind. Block movement, placing cement briquettes on the subsea oil pipeline

Method used

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  • Method for placing cement briquettes of submarine pipeline
  • Method for placing cement briquettes of submarine pipeline
  • Method for placing cement briquettes of submarine pipeline

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] Such as figure 1 — Figure 8 As shown, the present invention uses the dynamic positioning vessel 1 as the construction platform. Before going out to sea, the underwater robot 2, the cement briquette 3 and the hoisting frame 4 of the special tool are placed on the dynamic positioning vessel 1 according to the equipment and material loading design drawings. respective locations.

[0029] The following steps are used during offshore operations:

[0030] Step 1: After the dynamic positioning vessel 1 arrives at the sea area of ​​the construction site, install the camera and the obstacle avoidance sonar head on the parent body of the underwater robot 2, and insert the information transmission line between the above-water and underwater observation equipment. Put the robot 2 into the water to check whether the obstacle avoidance sonar 6 is working normally;

[0031] Step 2: Under the guidance of the DGPS positioning system, the dynamic positioning ship 1 stays near the sub...

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Abstract

Disclosed is a method for placing cement briquettes of a submarine pipeline. The method includes the steps: firstly, when a dynamic positioning ship arrives at a scene, mounting a camera and an obstacle-avoiding sonar head on an underwater robot, and connecting an overwater observation device with an underwater observation device through a transmission line, and checking whether the obstacle-avoiding sonar works normally or not; secondly, locating the dynamic positioning ship close to the submarine pipeline, turning a heading of the underwater robot to face to the submarine pipeline, and then adjusting sweeping survey distances of the obstacle-avoiding sonar until a strong-signal slim line for pipe displaying appears on an overwater displayer of the obstacle-avoiding sonar; thirdly, placing a hanger frame and cement briquettes into the water synchronously, and laying down the cement briquettes under a guidance of an obstacle-avoiding sonar image; and fourthly, repeating the second step to the third step until laying of all the cement briquettes is completed. By the method, on a special condition of inactivation of a robot video electronic eye underwater, a sonar object recognition technology can be served for guiding movements of the cement briquettes and the cement briquettes placing can be performed, so that work can be continued.

Description

technical field [0001] The invention relates to a method for installing cement briquettes, in particular to a method for arranging cement briquettes for submarine pipelines by using an underwater robot sonar system in an environmental working condition with low underwater visibility. Background technique [0002] At present, in offshore oilfield development projects, when the submarine oil pipeline is laid, the curved section near the root of the platform—the expansion bend will be covered with some "concrete mattresses" made of concrete materials, commonly known as cement briquettes. Used to protect the stability of submarine oil pipelines. [0003] With the transfer of offshore oil fields to sub-deep water and deep water, and the application of underwater robot (ROV) technology, this work is gradually replaced by underwater robots. Conventional underwater robots are equipped with working tools such as video electronic eyes, compass and manipulator. When the underwater ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L1/16
Inventor 李士涛于长生商涛李鹏刘富鹏
Owner CHINA NAT OFFSHORE OIL CORP
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