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L80油管腐蚀失效原因分析

Oil Field Equipment(2011)

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Abstract
西江油田某油井井管出现腐蚀穿孔现象,根据现场工况并结合SEM、EDS、XRD等技术手段对其腐蚀失效原因进行了系统分析。结果表明:油管材质的各项性能指标均符合标准要求,其失效的主要原因是CO2腐蚀、氧腐蚀和Cl-联合作用使得油管管体穿孔,油管内部的腐蚀性介质进入套管和油管的环空导致油管外壁的CO2腐蚀和氧腐蚀。
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Key words
oxygen corrosion,CO2corrosion,L80 tubing
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