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The Study and Application of the Gravity Type Atmosphere Pressure Dry Cabin Technology for the Sub-sea Pipeline Repairing

机译:重力式气氛压力干燥舱技术对亚海管道修复的研究与应用

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摘要

There are some methods to repair damaged and distorted sub-sea pipelines, including gripper connector reparation, pipeline lifting and flange welding reparation and gravity atmosphere pressure dry cabin ( GAPDC ) reparation etc. Different methods can be applied in different scopes: gripper connector can be used in both shallow and deep sea, pipeline lifting and flange welding reparation can only be used in shallow sea which is less than 30 meters, and GAPDC can be used in special occasion in shallow sea that can not lift the pipeline or need welding under gravity atmosphere pressure. The writer of this paper, as the project manager, presided the Dongfang 1-1 landing pipeline repair project. Taking all the circumstances into consideration, such as the nearshore pipeline buried 9 meters under the rubble mound, the pipeline tip 24 meters to the rubble mound, can not lift the pipe to weld the flange and booking a ball flange need a long term, a new method-GAPDC, was developed and applied in the Dongfang 1-1 landing pipeline repair project successfully. This paper specifically introduced the pipieline repair scheme design, GAPDC structure design and operation procedures, including the prospecting of the damaged pipelines, the manufacture of the GAPDC, the clearance and cutting of the damaged pipeline, the fishing operation of pipeline, the emplacement of the GAPDC, flange welding in the dry cabin etc. At the same time, it also introduced new technology innovation and application in this project, and provided some experience to the similar project for the future.
机译:有一些方法可以修复损坏和扭曲的亚海管道,包括夹具连接器恢复,管道提升和法兰焊接恢复和重力气氛压力干燥舱(GAPDC)拒绝等。不同的方法可以应用于不同的范围:夹具连接器可以是用于浅层和深海,管道提升和法兰焊接赔偿只能用于浅海,距离不到30米,Gapdc可用于浅海中的特殊场合,不能抬起管道或在重力下需要焊接压力压力。本文的作者,作为项目经理,主持了东方1-1降落管道维修项目。采取所有情况考虑,如近岸管道埋在瓦砾土墩下,管道尖端24米到瓦砾土墩,不能抬起管道焊接法兰并预订球法兰需要长期,a新的方法 - Gapdc,在东方1-1登陆管道修复项目成功开发和应用。本文具体介绍了Pipieline修复方案设计,GapDC结构设计和操作程序,包括损坏管道的勘探,制造Gapdc,损坏管道的间隙,捕捞运行,管道的捕捞操作,施加的施工GAPDC,在干燥舱等中的法兰焊接等。同时,它还在该项目中引入了新技术创新和应用,为未来的类似项目提供了一些经验。

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