全井筒试压时140V钢级油层套管管体爆裂原因  

Burst Cause of 140V Steel Grade Production Casing Pipe During Wellbore Pressure Test

作　　者：赵金兰 仝珂 李虹 郭军[3] 刘剑雄 刘青 ZHAO Jinlan;TONG Ke;LI Hong;GUO Jun;LIU Jianxiong;LIU Qing(CNPC Tubular Goods Research Institute,Xi'an 710077,China;Safety,Environment,and Technology Supervision Research Institute of Petrochina Southwest Oil&.Gasfield Company,Chengdu 610096,China;PetroChina Southwest Oil and Gasfield Company,Chengdu 610017,China)

机构地区：[1]中国石油集团工程材料研究院有限公司,西安710077 [2]西南油气田安全环保与技术监督研究院,成都610096 [3]中国石油天然气股份有限公司西南油气田物资分公司,成都610017

出　　处：《机械工程材料》2022年第11期97-101,110,共6页Materials For Mechanical Engineering

摘　　要：140V钢级油层套管在进行全井筒试压时管体爆裂,采用宏观形貌分析、几何尺寸测量、力学试验、金相检测、扫描电镜及能谱分析等方法,分析了该套管管体爆裂原因。结果表明:该失效套管显微组织、几何尺寸、力学性能及抗内压强度等均符合标准要求,其管体爆裂模式为韧性断裂,爆裂的主要原因是管体内部压力超过了管体自身承压强度,导致发生过载断裂。The 140 V steel grade production casing pipe bursted during the wellbore pressure test.The causes of the casing pipe burst were analyzed by macromorphology analysis,geometry measurement,mechanical test,metallographic examination,scanning electron microscopy and energy spectrum analysis and so on.The results show that the microstructure,geometric size,mechanical properties and internal pressure strength of the failed casing met the requirements of the standard.The burst mode of the pipe was ductile fracture.The main reason for the burst was that the internal pressure of the pipe exceeded its own pressure bearing capacity,resulting in the overload fracture.

关 键 词：套管 塑性断裂 爆裂 失效分析 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]