Novel sea area pipeline laying floating assisting method

Abstract

The invention discloses a novel sea area pipeline laying floating assisting method, and relates to an offshore pipeline laying engineering technology. A pipeline laying ship is accurately positioned to ensure that a pipeline can be laid along a preset pipeline laying axis, seawater is poured into the pipeline, the dead weight of the pipeline is increased, the pipeline automatically slides down to the sea from a stinger, a certain friction force is provided for the pipeline through a clamping device, buckling and wrinkling caused by too high gliding speed of the pipeline are avoided, floating-assisting bodies composed of foam floating bodies are evenly installed on the pipeline, buoyancy is provided when the pipeline sinks, the deformation curve of the pipeline under water is restrained, stress borne by the pipeline is reduced, the protection effect is achieved, a common pipeline laying project does not adopt floating-assisting facilities, and according to the method, economical and efficient floating-assisting facilities are added on the basis of a traditional laying method, so that the stability during pipeline laying is enhanced.

Description

technical field [0001] The invention relates to engineering technology for laying offshore pipelines, in particular to a novel buoyancy aiding method for laying pipelines in sea areas. Background technique [0002] At present, the pipe-laying barge method is the most commonly used laying method for submarine pipelines in the near-shore area. The pipeline is transported to the pipeline stacking area of ​​the pipe-laying barge by the pipe-laying ship. Pipeline welding and weld inspection work, after the pipeline splicing is completed, the pipeline is lowered to the bottom of the water through the stinger, and the pipeline is supported by the stinger to sink. Because this pipeline laying method does not use pipeline clamps during the pipeline lowering process Due to the lack of buoyancy aid facilities, the deformation curve of the pipeline under water cannot be restrained during the laying process, which will easily lead to the overly long suspension section of the pipeline und...

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Problems solved by technology

[0002] At present, the pipe-laying barge method is the most commonly used laying method for submarine pipelines in the near-shore area. The pipeline is transported to the pipeline stacking area of ​​the pipe-laying barge by the pipe-laying ship. Pipeline welding and weld inspection work, after the pipeline splicing is completed, the pipeline is lowered to the bottom of the water through the stinger, and the pipeline is supported by the stinger to sink. Because this pipeline laying method does not use pipeline clamps during the pipeline lowering process Due to the lack of buoyancy aid facilities, the deformation curve of the pipeline under water cannot be restrained during the laying process, which will easily lead to the overly long suspension section of the pipeline under water, and the stress of the steel pipe will increase, causing the pipeline to break out. Buckling and folding, the pipeline is damaged, so it is necessary to install buoyancy aids above the pipeline

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