钻柱失效原因中的制造因素分析  

ANALYSIS OF MANUFACTURING FACTORS AFFECTING DRILLING STRING FAILURE

作　　者：李方坡 刘永刚 王新虎 

机构地区：[1]中国石油集团石油管工程技术研究院

出　　处：《钻采工艺》2013年第6期86-88,7,共3页Drilling & Production Technology

基　　金：中国石油天然气集团公司科学研究与技术开发项目"油井管柱完整性技术研究"(2011A-4208)

摘　　要：结合我国近年来发生的典型钻柱失效案例对油气井钻柱失效原因中的制造因素进行系统研究分析,结果表明,钻柱的失效模式与失效原因是两个不同的概念,钻柱的主要失效模式是疲劳,而钻柱的失效原因则主要包括制造因素、设计因素、使用因素和环境因素四个方面。钻柱制造过程中形成的缺陷主要包括非金属夹杂、折皱、表面脱碳、螺纹成型、加工缺陷和耐磨带堆焊不当等,这些缺陷通过降低疲劳裂纹萌生寿命而诱发钻柱的早期失效。建议加强钻柱的失效分析工作,减少钻柱失效事故的发生。In this paper,typical drill string failure cases and manufacturing factors caused drill string failure were studied and analyzed.Failure mode and failure reason are different concepts.The main failure mode of drilling string is fatigue failure,but its main failure reasons include manufacture,design,application and environment factors.The main defects formed in manufacturing process include blended nonmetal,crumple,surface decarburization and mechanical damage and so on.These defects could cause drilling string's early fatigue failure through reducing fatigue crack initiation life.In order to guarantee drill string's safety and reliability,effective measures should be taken in failure analysis to avoid the failure accidents.

关 键 词：钻柱 疲劳 失效分析 制造缺陷 

分 类 号：TE921[石油与天然气工程—石油机械设备]