Study on Repair Methods for Deepwater Pipeline

Abstract

Abstract:

The special environment conditions of oil and gas fields near Liwan 3-1 are introduced with their adverse effects on pipelines, and three damage scenarios of deepwater pipeline for repairing damaged pipeline are listed. According to the damage scenarios, methods for repairing damaged pipeline in deep water are summarized with repair procedure and equipment, and those methods are compared. Finally, the application possibility of all methods for pipeline repair in deepwater field is analyzed. It is concluded that repair with bolted clamp or connector can be main repair methods for deepwater pipelines in China.

Key words: deepwater pipeline, damage scenarios of pipeline, pipeline repair, repair procedure

CLC Number:

TE973

Chao MA, Kun SUN, Ye-zhou HUANG, Xiao-dong CHEN, Shou-yang SUN. Study on Repair Methods for Deepwater Pipeline[J]. Ocean Engineering Equipment and Technology, 2015, 2(3): 168-174.

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事故类型	水深/m	推荐方法	维修工况	技术原理
穿孔小漏	>300	管卡维修	不停产	封闭隔离
管线大漏	>300	受损管段更换维修	停产	局部损坏管段更换
管道变形	>300	受损管段更换维修	停产	局部损坏管段更换

深水海管维修方法	管卡维修	受损管段更换维修
深水海管维修方法	管卡维修	连接器维修	焊接维修	螺栓管卡维修
限时停产维修	否	是	是	是
快速性	快	一般	一般	一般
经济性	高	一般	一般	一般
密封质量	中等	中等	优	中等
海底地形	适应性良好	受限	受限	受限
适用管线直径/英寸	4~42	4~24	4~42	4~42
适用管线压力	高压、低压均可	高压、低压均可	高压、低压均可	高压、低压均可
适用情形	损伤区域较小时	损伤区域较大时	损伤区域较大时	损伤区域较大时