理化检验-物理分册2016，Vol.52Issue(5)：328-331,4.DOI:10.11973/lhjy-wl201605010
某钻铤断裂原因分析
Causes Analysis on Fracture of One Drilling Collar
摘要
Abstract
Fracture failure of one 6⅟2″(165.1 mm)drilling collar used in an oil field occurred during drilling. The fracture causes of the drilling collar were analyzed from the aspects of macroscopic inspection,ultrasonic thickness measurement,magnetic powder inspection,chemical composition analysis,metallurgical analysis,and so on.The results show that the fracture mode of the drilling collar was fatigue fracture.The cracks initiated at the bottom of the thread.With the annular clearance enlarged,the cracks initiated and propagated due to the serious stress environment during drilling.Finally,the drilling collar fractured under the impact of the internal high-pressure mud.关键词
钻铤/疲劳断裂/裂纹/理化检验Key words
drilling collar/fatigue fracture/crack/physical testing and chemical analysis分类
能源科技引用本文复制引用
刘强,万朝晖,吕依依,宋生印,白强..某钻铤断裂原因分析[J].理化检验-物理分册,2016,52(5):328-331,4.基金项目
海底油气开采用特殊钢材料产业化技术开发资助项目(2015BAE03B03) （2015BAE03B03）
