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A construction method for underwater installation of subsea pipeline under pressure drilling operation

A submarine pipeline and pressure drilling technology, which is applied in pipeline laying and maintenance, excavation, pipes, etc., can solve the problem of incapable underwater pressure drilling of submarine pipelines, difficulty in controlling the levelness accuracy of the drilling machine and the drilling orientation Accuracy and other issues, to achieve the effect of increasing underwater working time, improving visibility and better control

Active Publication Date: 2021-06-04
深圳市杉叶实业有限公司
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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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  • A construction method for underwater installation of subsea pipeline under pressure drilling operation

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0046] It should be noted that all directional indications (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 conditions between the various components in a certain posture , if the specific posture changes, the directional indication also changes accordingly.

[0047] It should also be noted that when an element is referred to as being “f...

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Abstract

The invention is applicable to the technical field of submarine pipeline maintenance and transformation, and discloses a construction method for underwater installation of submarine pipelines with underwater pressure opening operation, which includes a mud removal step, a cement weight layer and anti-corrosion layer removal step, a grinding step, Polishing step, protective frame group skid underwater installation step, drilling machine assembly installation step, testing step, drilling step and dismantling step, wherein the desilting step includes desilting and forming under the pre-installed mechanical tee part of the submarine pipeline It is a foundation pit that provides operating space for divers to work in the air next to the submarine pipeline. The present invention can effectively reduce the occurrence of mud lifting caused by divers touching the bottom during operation activities, thereby improving the visibility of seawater at the construction site, and effectively reducing the impact of tidal currents on diving operations, which is beneficial to increasing divers' underwater work Finally, good construction conditions were created for underwater pressure drilling of submarine pipelines under the sea conditions with muddy water and tidal currents.

Description

technical field [0001] The invention relates to the technical field of submarine pipeline maintenance and modification, in particular to a construction method for underwater installation of submarine pipelines under pressure and under pressure. Background technique [0002] Submarine pipelines are pipelines installed on the seabed to transport oil, natural gas and other fluid media. With the continuous increase of the service life of submarine pipelines, the maintenance and transformation of submarine pipelines will also increase. Among them, the underwater pressurized drilling of in-service submarine pipelines is an essential emergency response capability required for emergency repairs of submarine pipelines and pipeline network transformation. However, in the prior art, there are two problems in the specific application of underwater pressure drilling technology for submarine pipelines: [0003] 1) In the sea conditions where muddy water and tidal currents are greatly af...

Claims

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Application Information

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Patent Type & Authority Patents(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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