The invention discloses an L-shaped shallow sea pipeline laying process, and relates to the technical field of pipeline laying engineering. The L-shaped shallow sea pipeline laying process comprises the following steps of towing a pipeline laying ship to a pipeline laying axis position, carrying out anchoring by an anchoring ship, and adjusting the pipeline laying ship to the designed pipeline laying axis center position; hoisting two sections of steel pipes to a guide frame for pipeline laying, enabling the pipe sections to slide downwards to a pipeline welding platform along a track of the guide frame, and welding the two sections of steel pipes into a pipeline; enabling the pipeline to slide downwards to a stinger, and fixing the pipeline through a clamping device; hoisting a next pipe section to the guide frame, and completing welding of the pipe section and the pipeline on the welding platform; loosening the pipe clamping device, and enabling the first two sections of pipelines to enter water by adopting a water injection method; enabling the pipeline laying ship to move backwards and retreat, and enabling the pipeline to slide down to the seabed along the stinger; and repeating the procedures of fixing, hoisting, welding and lowering until all pipelines are laid. According to the L-shaped shallow sea pipeline laying process, the construction efficiency of offshore pipeline laying can be improved, the influence of environmental factors on pipeline laying construction operation is reduced, the effect is good, and the positioning precision is higher.
一种L型浅海管道敷设工艺,涉及管道敷设工程技术领域,其步骤如下,将管道敷设船拖带至管道敷设轴线位置处,抛锚船抛锚,调整管道敷设船至设计管道敷设轴线中心位置处;吊运两节钢管至管道敷设的导向架上,将管节沿着导向架的轨道下滑至管道焊接平台处,将两节钢管焊接为管道;将管道下滑至托管架上,夹紧器将管道固定;吊运下一个管节至导向架上,在焊接平台处完成管节和管道的焊接;放松夹管器,采用注水法使前两节管道下水;管道敷设船后移退放,管道沿托管架下滑至海底;重复固定、吊运、焊接、下放工序直至全部管道敷设完成。本发明能够提高海上管道敷设的施工效率,降低环境因素对管道敷设施工作业的影响,效果较好,定位精度更高。
L-shaped shallow sea pipeline laying process
一种L型浅海管道敷设工艺
2021-05-28
Patent
Electronic Resource
Chinese
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