Pipeline-laying vessel and pipeline-laying method using same

Abstract

Disclosed are a pipeline-laying vessel and a pipeline-laying method using same. According to one embodiment, the pipeline-laying vessel comprises: a platform which is provided along the pipeline-laying route and on which is placed one or more work stations where pipeline assembly is carried out; a stringer which is connected near to one end of the platform and guides the pipeline to the sea floor; and a raising-and-lowering actuator which adjusts the angle of inclination of the platform.

Description

technical field [0001] The present invention relates to a pipeline laying vessel for laying pipelines on the seabed, and a pipeline laying method using the pipeline laying vessel. Background technique [0002] A laying vessel for laying pipelines on the seabed moves along the coast or deep sea and lays pipelines on the seafloor using a pipeline laying system provided on the hull. The pipeline is connected to each other by welding each pipeline segment per unit length on the laying ship and lowered to the seabed. [0003] Such a pipeline laying ship uses the S-lay and J-lay methods according to the method of laying pipelines. [0004] In the S-lay method, when the pipeline is dropped from the laying ship along the pipeline laying route, it descends along an S-shaped route with a large curvature radius by means of an inclined arched ramp (ramp) known as a stinger. laid on the seabed. Therefore, in this S-lay method, due to the load of the laid pipeline, there is a danger of...

AI Technical Summary

Problems solved by technology

[0007] However, there is a problem that in order to use the S-lay ship for deep-sea pipeline laying work, the length of the erection device for bearing the weight of the pipeline to be laid needs to be lengthened, and therefore, the structural rigidity and restorability of the laying ship caused by this make it difficult For deep sea pipeline laying operations

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