A new four-node j-drum integrated laying system

Abstract

The invention provides a novel four-joint J-shape-winding drum integrated laying system. The laying system mainly comprises a laying tower, a winding drum, a laying tower angle adjusting system, a straightening system, a pipe laying and conveying system and key equipment for pipe laying, wherein the laying tower angle adjusting system comprises A frames, angle adjusters, hydraulic cylinders and angle adjuster connecting shafts; the straightening system comprises a correcting wheel, a straightener and a straightening roller; the pipe laying and conveying system comprises a horizontal conveying system, a loading arm and an elevator; the key equipment for pipe laying comprises a tensioner and a moving platform. The laying system can complete pipe laying work of pipes in various sizes, materials and diameters at various water depths; not only can the total use amount of equipment be reduced, but also laying manners can be switched timely according to actual laying requirements, and under the condition that stress to the pipe is reduced, the quality and the efficiency of pipe laying are improved, the economy is improved, and the system has quite high comprehensive operation capacity.

Description

technical field [0001] The invention relates to a laying system, in particular to a novel four-node J-type-drum integrated laying system. Background technique [0002] In recent years, with the continuous increase of offshore oil and gas development activities, deep-sea pipeline laying technology has continued to innovate and develop rapidly in the face of challenges. According to the existing actual pipe laying engineering experience, there are mainly four types of pipe laying methods: S-shaped laying, J-shaped laying, reel laying and drag-and-drop laying. [0003] There are many practical application cases of S-type laying, but S-type laying is greatly affected by water depth. As water depth increases, longer stingers and higher tension are required, which will lead to loss of stability and increase operational risks; J-type laying can Ensure that the stress on the pipeline during the laying process is small, but the height of the laying tower on the pipe-laying ship in t...

AI Technical Summary

Problems solved by technology

[0003] There are many practical application cases of S-type laying, but S-type laying is greatly affected by water depth. As water depth increases, longer stingers and higher tension are required, which will lead to loss of stability and increase operational risks; J-type laying can Ensure that the stress on the pipeline during the laying process is small, but the height of the laying tower on the pipe-laying ship in the current project is generally 80-135m, stability is a problem, and the laying speed is relatively slow: the typical laying speed is 1-1.5 km / Day; drum laying has high laying efficiency, which can effectively reduce the working time at sea and reduce the operating cost at sea, but the drum laying has high requirements on the performance of pipeline materials, and the straightening system of the current drum laying straightening system The direction has an included angle with the direction of gravity, which is easy to produce circumferential strain; the drag-and-drop laying has lower requirements on various aspects and is more convenient to operate, but its laying capacity and the length of the installable pipe are limited, which affects its application range

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