焊管2024，Vol.47Issue(5)：53-60,8.DOI:10.19291/j.cnki.1001-3938.2024.05.008
渤海某油井用316L不锈钢液控管线断裂失效分析
Failure Analysis of 316L Stainless Steel Hydraulic Pipeline Used in an Oil Well in Bohai Oilfield
刘金鑫1
作者信息
- 1. 中海油田服务股份有限公司,天津 300450
- 折叠
摘要
Abstract
The 316L stainless steel hydraulic pipeline in well A and well B of Bohai oilfield broke during service,resulting in on-site workover and replacement of pipe string.The reasons for the failure of the liquid control line were analyzed bymacroscopic inspection,physical and chemical detection,metallographic analysis,scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS).The results show that there are dense distribution of ferrite and chain distribution of Cr-rich carbides along the grain boundary of the sample in the failed pipe section,which leads to intergranular corrosion in the H2S-containing medium in the well.Intergranular cracks occur on the outer surface under the action of tension,and gradually spread from the outer wall to the inner wall along the circumference and until the cracks penetrate the thickness of the pipe body wall,and instantaneous fracture failure occurs.关键词
316L不锈钢/液控管线/晶间腐蚀/失效分析Key words
316L stainless steel/hydraulic pipeline/intergranular corrosion/failure analysis分类
矿业与冶金引用本文复制引用
刘金鑫..渤海某油井用316L不锈钢液控管线断裂失效分析[J].焊管,2024,47(5):53-60,8.
