某海上平台4130钢注水泵泵体开裂失效分析
Failure analysis on cracking of 4130 steel casing of an offshore platform water injection pump
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- 引用格式:
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杨中娜,赵杰瑛,孟强,夏明磊,金磊,杨阳.某海上平台4130钢注水泵泵体开裂失效分析[J].天然气与石油,2021,39(4):78-84.doi:10.3969/j.issn.1006-5539.2021.04.014
YANG Zhongna, ZHAO Jieying, MENG Qiang, XIA Minglei, JIN Lei, YANG Yang.Failure analysis on cracking of 4130 steel casing of an offshore platform water injection pump[J].Natural Gas and Oil,2021,39(4):78-84.doi:10.3969/j.issn.1006-5539.2021.04.014
- DOI:
- 10.3969/j.issn.1006-5539.2021.04.014
- 作者:
- 杨中娜1 赵杰瑛2 孟强1 夏明磊1 金磊1 杨阳1
YANG Zhongna1, ZHAO Jieying2, MENG Qiang1, XIA Minglei1, JIN Lei1, YANG Yang1
- 作者单位:
- 1. 中海油(天津)管道工程技术有限公司, 天津 300452; 2. 中海石油(中国)有限公司湛江分公司, 广东 湛江 524000
1. CNOOC (Tianjin) Pipeline Engineering Technology Co., Ltd., Tianjin, 300452, China; 2. Zhanjiang Branch of CNOOC (China) Co., Ltd., Zhanjiang, Guangdong, 524000, China
- 关键词:
- 注水泵;开裂;失效分析;腐蚀疲劳
Water injection pump; Cracking; Failure analysis; Corrosion fatigue
- 摘要:
- 某海上平台注水泵在累计运行3个月后发生开裂,为查找开裂原因,通过宏观形貌分析、无损检测、解剖分析、微观分析(SEM)、腐蚀产物分析(XRD & EDS)、理化性能分析及有限元分析等手段对开裂注水泵进行失效分析。分析结果表明,开裂注水泵碳含量超标,耐海水腐蚀性较差,在水平和垂直内孔的十字交汇处(6点钟和12点钟位置)存在严重的应力集中,注水泵在腐蚀及交变应力的联合作用下导致腐蚀疲劳失效开裂。根据分析结果提出了避免或降低类似事故再次发生的相关建议,对保障平台注水系统的安全生产具有重要意义。
An offshore platform injection pump casing cracked after 3 months of operation. In order to find out the cause of the casing cracking, failure analysis was conducted by macroscopic morphology analysis, Non-Destructive Testing (NDT), anatomical analysis, microscopic analysis (SEM), corrosion products analysis (XRD & EDS), physical and chemical performance analysis and finite element analysis. The analysis results showed that the injection pump had excessive carbon content, poor seawater corrosion resistance, and severe stress concentrations at the intersection of the horizontal and vertical inner bore (6 oclock and 12 oclock location). The failure of water injection pump was due to fatigue corrosion caused by a combination of corrosion and alternating stress In this paper, recommendation is made to avoid or mitigate such incidents in future, which is of great significance to ensure the safe operation of the platform water injection system.
