Light double-node pipeline J-shaped laying system

Abstract

The invention provides a light double-node pipeline J-shaped laying system comprising a J-shaped tower, a J-shaped tower angle adjusting portion, a pipeline conveying portion and a pipeline laying portion. The J-shaped tower is used for supporting, fixing and connecting other structures and key devices of the J-shaped laying system. The J-shaped tower angle adjusting system comprises an angle adjuster, an A-shaped frame and a hydraulic cylinder and can achieve free adjustment of the J-shaped tower within a certain angle range. The pipeline conveying portion comprises a horizontal conveying system, a loading arm, a rotating arm and a vertical idler wheel. The pipeline laying portion comprises an outer centralizer, a tensioning device, a welding station and a coating station which have the conveying function, the centering function and the fixing functions in the laying process. The J-shaped laying system can achieve a 2*2 node laying manner. Some key devices are installed by selecting, arranging and optimizing relevant devices. In this way, the laying cost is reduced, and laying efficiency is improved.

Description

technical field [0001] The invention relates to pipeline laying equipment, in particular to a light double-node pipeline J-shaped laying system, which is mainly used for laying deep-water submarine pipelines and standpipes. Background technique [0002] In recent years, with the increasing demand for oil and gas resources, the development of offshore oil and gas has been moving towards the deep sea. At present, the methods suitable for deepwater subsea pipeline laying are mainly S-Lay and J-Lay. Due to the large bending deformation of the pipeline in the S-Lay laying method, a stinger and a large tensioner capacity are required, which limits its application. The J-type submarine pipeline laying method is a pipeline laying method that lowers the pipeline to the seabed in a nearly vertical form. The required pipeline tension is small, the suspension length of the pipeline during the laying process is small, and the residual stress of the pipeline after laying is small. Theref...

AI Technical Summary

Problems solved by technology

Due to the limitation of the bending degree of the pipe section, the angle range it can adapt to is relatively small, and the bending of the laying pipe section may cause damage to the pipeline

Moreover, there is no relevant upper pipe device on the tower, and other lifting equipment on the hull must be used to transfer the pipe, which complicates the transfer of the pipe section.

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