Φ127 mm G105钻杆管体刺漏形成原因分析  

Cause Analysis of Φ127 mm G105 Drill Pipe Body Thorn Leakage

作　　者：陈猛[1] 欧阳志英[1] 余世杰[1] CHEN Meng;OUYANG Zhiying;YU Shijie(Shanghai Hilong Oil Tubular Goods Research Institute,Shanghai 200949,China)

机构地区：[1]上海海隆石油管材研究所,上海200949

出　　处：《石油管材与仪器》2021年第4期41-45,共5页Petroleum Tubular Goods & Instruments

基　　金：上海市优秀技术带头人计划资助(编号:19XD1430400)。

摘　　要：某井一钻杆在服役的过程中发生了刺漏现象,为了查明此钻杆刺漏形成的原因,对失效钻杆样品进行了宏观分析、材料化学成分分析、力学性能分析和金相显微组织分析;对刺孔微观形貌及周围划痕底部金相微观形貌进行了测定和分析;对刺漏的形成过程进行了有限分析和推理。结果表明:钻杆刺穿属于疲劳失效,疲劳裂纹的形成与钻杆外壁周向划痕有直接的关联。In order to find out the cause of thorn leakage of a drill pipe in service of a certain well,macro analysis,material chemical composition analysis,mechanical property analysis and metallographic microstructure analysis were carried out on the failed drill pipe samples.The microscopic morphology of the piercing hole and the bottom of the surrounding scratches were measured and analyzed.The formation process of punctures is analyzed and reasoned by using finite element method.The results show that the puncture of drill pipe is fatigue failure,and the formation of fatigue crack is directly related to the circumferential scratch on outer surface of drill pipe.

关 键 词：周向划痕 疲劳裂纹 刺漏 钻杆 

分 类 号：TE921[石油与天然气工程—石油机械设备]