[1]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.[doi:10.19291/j.cnki.1001-3938.2024.05.008]
 LIU Jinxin.Failure Analysis of 316L Stainless Steel Hydraulic Pipeline Used in an Oil Well in Bohai Oilfield[J].,2024,47(5):53-60.[doi:10.19291/j.cnki.1001-3938.2024.05.008]
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渤海某油井用316L不锈钢液控管线断裂失效分析()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
47
期数:
2024年第5期
页码:
53-60
栏目:
失效分析
出版日期:
2024-05-28

文章信息/Info

Title:
Failure Analysis of 316L Stainless Steel Hydraulic Pipeline Used in an Oil Well in Bohai Oilfield
文章编号:
10.19291/j.cnki.1001-3938.2024.05.008
作者:
刘金鑫
中海油田服务股份有限公司,天津 300450
Author(s):
LIU Jinxin
China Oilfield Services Limited, Tianjin 300450, China
关键词:
316L不锈钢液控管线晶间腐蚀失效分析
Keywords:
316L stainless steelhydraulic pipelineintergranular corrosionfailure analysis
分类号:
TG174
DOI:
10.19291/j.cnki.1001-3938.2024.05.008
文献标志码:
A
摘要:
渤海某油井A井和B井井下316L不锈钢液控管线在服役过程中发生断裂,导致现场修井更换管柱。通过宏观检验、理化检测、金相分析、扫描电镜(SEM)以及能谱分析(EDS)等手段对该液控管线失效的原因进行分析。结果表明:失效管段试样沿晶界位置有密集分布的铁素体和链状分布的富Cr碳化物,导致在井下含H2S的介质中发生晶间腐蚀,拉力作用下在外表面产生晶间裂纹,并逐步沿周向和由外壁向内壁扩展,直至裂纹贯穿管体壁厚,发生瞬时断裂失效。
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 ontaining 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.

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备注/Memo

备注/Memo:
收稿日期:2024-01-29
作者简介:刘金鑫(1983—),男,工程师,主要从事油气田完井工具方面研究工作。
更新日期/Last Update: 2024-05-30