某西部油田高温高压气井连续油管断裂原因  

Cause of coiled tubing fracture of a high-temperature and high-pressure gas well in a western oilfield

作　　者：闫湃 龙岩 窦伟 邝献任 罗金恒 雒设计[1] YAN Pai;LONG Yan;DOU Wei;KUANG Xianren;LUO Jinheng;LUO Sheji(Xi'an Shiyou University,Xi'an 710065,China;CNPC Tubular Goods Research Institute,Xi'an 710077,China;Baoji Petroleum Machinery Co.,Ltd.,Baoji 721002,China)

机构地区：[1]西安石油大学,西安710065 [2]中国石油集团石油管工程技术研究院,西安710077 [3]宝鸡石油机械有限责任公司,宝鸡721002

出　　处：《理化检验（物理分册）》2022年第1期18-22,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某西部油田高温高压气井连续油管在下井过程中发生断裂,采用宏观观察、无损探伤、化学成分分析、力学性能试验、金相检验、扫描电镜及能谱分析等方法,分析了连续油管断裂的原因。结果表明:该连续油管在下井过程中,管壁发生结腊,连续油管受到压缩载荷,导致下井受阻,当压缩载荷超过材料屈服强度后,连续油管发生压缩变形,随后发生断裂。The coiled tubing of a high-temperature and high-pressure gas well in a western oilfield fractured during the downhole process. Macroscopic observation, non-destructive testing, chemical composition analysis, mechanical performance test, metallographic inspection, scanning electron microscopy and energy spectrum analysis were used to analyze the cause of coiled tubing fracture. The results showed that during the downhole process of coiled tubing, wax formation occurred on the pipe wall. The coiled tubing was subjected to a compressive load, which caused the downhole to be blocked. When the compressive load exceeded the yield strength of the material, the coiled tubing was compressed and deformed and subsequently fractured.

关 键 词：连续油管 断裂 失效分析 

分 类 号：TG115[金属学及工艺—物理冶金]