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Underwater installation construction method for submarine pipeline underwater holing operation under pressure

A technology for subsea pipelines and under pressure drilling, which is applied in the directions of pipeline laying and maintenance, pipes, and excavation. Accuracy and other issues to achieve the effect of increasing underwater working time, improving visibility, and reducing impact

Active Publication Date: 2021-01-15
深圳市杉叶实业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a construction method for underwater installation of subsea pipelines under pressure, which aims to solve the problem that the prior art cannot make subsea pipelines underwater under pressure under the conditions of muddy water and tidal currents. Hole opening operation and the technical problems that it is difficult to control the levelness accuracy and the orientation accuracy of the hole opening machine

Method used

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  • Underwater installation construction method for submarine pipeline underwater holing operation under pressure

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Embodiment Construction

[0045]The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0046]It should be noted that all the directional indicators (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. , If the specific posture changes, the directional indication will change accordingly.

[0047]It should also be noted that when an element is referred to as being "fixed on" or "dis...

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Abstract

The invention is suitable for the technical field of submarine pipeline maintenance and transformation, and discloses an underwater installation construction method for submarine pipeline underwater holing operation under pressure. The method comprises a mud removing step, a cement balance weight layer and anticorrosive layer removing step, a grinding step, a polishing step, a protection frame assembly skid underwater mounting step, a tapping machine assembly mounting step, a testing step, a tapping step and a dismounting step, wherein the mud removing step comprises the step of removing mud below a pre-installed mechanical tee joint part of the submarine pipeline to form a foundation pit used for providing an operation space for a diver to perform suspended operation beside the submarinepipeline. According to the method, the phenomenon that mud is raised due to the fact that the diver touches the bottom during operation can be effectively reduced, so that the visibility of seawater at a construction site is improved, the influence of tidal large water flow on diving operation is effectively reduced, and the underwater working time of the diver is prolonged; and finally, a good construction condition is created for underwater pressure tapping of the submarine pipeline under the sea condition that muddy water and tidal water flow influence is large.

Description

Technical field[0001]The invention relates to the technical field of maintenance and transformation of submarine pipelines, in particular to a construction method for underwater installation of submarine pipelines under pressure under pressure.Background technique[0002]Submarine pipelines are pipelines set on the seabed to transport oil, natural gas and other fluid media. As the service life of submarine pipelines continues to increase, the maintenance and transformation of submarine pipelines will also increase. Among them, the submarine pipeline opening under pressure under water is the necessary emergency response capability required by the submarine pipeline emergency repair and pipeline network transformation. However, in the prior art, the submarine pipeline underwater pressure tapping technology has the following two problems in specific applications:[0003]1) Under the sea conditions where muddy water and tidal currents have a great influence, the presence of floating mud wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/16F16L1/20F16L41/04E02D17/02
CPCE02D17/02F16L1/16F16L1/20F16L41/04
Inventor 闫向峰胡松肖晓凌李宗伟向朝华徐进程微高喜元张捷
Owner 深圳市杉叶实业有限公司
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