CNG储气井内插管正循环固井应力分析

Stress Analysis for CNG Storage Gas Well Cemented by Inside-Inserting Pipe in Direct Circulation

对目前采用井筒外部固井工艺建造的高压储气井进行了应力分析,指出了其存在的安全隐患。提出了采用内插管正循环固井工艺建造储气井的方法,从而消除安全隐患,确保CNG加气站的安全运行,为建造高压储气井提供借鉴。

At present, for the high pressure storage gas well built with technology of well cementation out of the pipe, a stress analysis was made. We pointed out that it has hidden danger in safety, and put forward a technology of building a storage gas well, which is cemented by insideinsert pipe in direct circulation. Thus, the hidden danger will be eliminated and CNG gas station operation is ensured safe, and the human life and property in safety around the station are protected. It gives a typical example for building a high pressure storage gas well.