文献类型：期刊文献

中文题名：套铣钻杆接头螺纹断裂分析与有限元模拟

英文题名：Thread Fracture Analysis and Finite Element Simulation of Drill Pipe Joint

作者：丁洁琼[1];鲁喜宁[1];高连新[2]

机构：[1]上海海隆石油管材研究所,上海200949;[2]华东理工大学机械与动力工程学院,上海200237

年份：2022

卷号：8

期号：2

起止页码：60

中文期刊名：石油管材与仪器

外文期刊名：Petroleum Tubular Goods & Instruments

语种：中文

中文关键词：钻杆接头;失效分析;过载;套铣作业;有限元

外文关键词：drill pipe joint;failure analysis;overload;milling;finite element

摘要：为了确定某油田在一次套铣作业时NC31(LH)钻杆外螺纹接头断裂的原因,对断裂钻杆接头的断口宏观、微观形貌、化学成分、力学性能和金相组织等进行了试验分析,并用管柱拉扭复合载荷图及有限元分析方法,对断裂失效的钻杆管体及接头的性能进行相关计算。分析结果表明,断裂钻杆化学成分与力学性能合格;断裂原因为套铣作业时,井底钻柱承受超载扭矩,在轴向拉伸与井底扭矩的共同作用下,外螺纹接头发生过载断裂失效。
In order to find out the fracture reason of NC31(LH)external thread joint in a milling operation in an oilfield,the macro and micro morphology,chemical composition,mechanical properties and metallographic structure of the fractured drill pipe joint were analyzed,and the performance of the failed pipe string and joint was calculated by using the string tension-torsion composite load diagram and finite element method.The analysis results show that the chemical composition and mechanical properties of the fractured drill pipe are qualified.The fracture reason is that the bottom hole drill string bears overload torque during milling operation.Under the combined action of axial tensile load and bottom hole torque,the overload failure of external thread joint occurs.