西部某油田修复油管的断裂原因
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摘要
采用无损检测、化学成分分析、金相观察、力学性能测试、断口分析、裂纹分析和腐蚀产物分析等手段系统研究了西部某油田修复油管断裂原因。结果表明:该修复油管失效属于应力腐蚀开裂;油管在修复前,管体内表面已存在应力腐蚀裂纹,后期服役过程中,受应力及井下所注污水中高含量侵蚀性CO2和Cl-影响,裂纹扩展造成油管断裂。
The fracture reasons for repaired tubing in a western oilfield were systematically analyzed by means of nondestructive testing,chemical analysis,metallographic observation,mechanical property testing,fracture analysis,crack analysis and corrosion product analysis.The results showed that the failure of repaired tubing was caused by stress corrosion cracking.Before the tubing was repaired,stress corrosion cracks had existed on the internal surface of tubing.By the influence of stress and high CO2 and Cl-content in injected waste water,the cracks expanded and thus caused the tubing fracture in later service.
The fracture reasons for repaired tubing in a western oilfield were systematically analyzed by means of nondestructive testing,chemical analysis,metallographic observation,mechanical property testing,fracture analysis,crack analysis and corrosion product analysis.The results showed that the failure of repaired tubing was caused by stress corrosion cracking.Before the tubing was repaired,stress corrosion cracks had existed on the internal surface of tubing.By the influence of stress and high CO2 and Cl-content in injected waste water,the cracks expanded and thus caused the tubing fracture in later service.
引文
[1]冯耀荣,杨龙,李鹤林.石油管失效分析预测预防与完整性管理[J].金属热处理,2011(S1):15-16.
[2]郑文照,王峰,任淑萍,等.旧油管检测修复技术的现状与对策[J].石油矿场机械,2003,32(3):54-56.
[3]李鹤林,李平全,冯耀荣.石油钻柱失效分析及预防[M].北京:石油工业出版社,1999.
[4]刘伟,蒲晓林,白小东,等.油田硫化氢腐蚀机理及防护的研究现状及进展[J].石油钻探技术,2008,36(1):83-86.
[5]汪兵,刘素娥,朱自勇,等.管线钢在近中性pH值溶液中的应力腐蚀开裂[J].腐蚀科学与防护技术,2001,13(2):71-73.
[6]张雷,国大鹏,路民旭.Cl-含量对J55钢CO2腐蚀行为的影响[J].中国腐蚀与防护学报,2009,29(1):64-68.
[7]崔志峰,韩一纯,庄力健,等.在Cl-环境下金属腐蚀行为和机理[J].石油化工腐蚀与防护,2011,28(4):1-5.
[2]郑文照,王峰,任淑萍,等.旧油管检测修复技术的现状与对策[J].石油矿场机械,2003,32(3):54-56.
[3]李鹤林,李平全,冯耀荣.石油钻柱失效分析及预防[M].北京:石油工业出版社,1999.
[4]刘伟,蒲晓林,白小东,等.油田硫化氢腐蚀机理及防护的研究现状及进展[J].石油钻探技术,2008,36(1):83-86.
[5]汪兵,刘素娥,朱自勇,等.管线钢在近中性pH值溶液中的应力腐蚀开裂[J].腐蚀科学与防护技术,2001,13(2):71-73.
[6]张雷,国大鹏,路民旭.Cl-含量对J55钢CO2腐蚀行为的影响[J].中国腐蚀与防护学报,2009,29(1):64-68.
[7]崔志峰,韩一纯,庄力健,等.在Cl-环境下金属腐蚀行为和机理[J].石油化工腐蚀与防护,2011,28(4):1-5.