摘要
采用宏观检验、XRD、SEM及模拟海水试验等方法研究了某海上油田油井套管腐蚀断裂的原因。结果表明,该油井套管腐蚀断裂的原因为海水进入套管环空,环空中含有空气,在海水液面附近,形成氧浓差电池,引起隔水套管在海水中腐蚀穿孔,在氯离子的促进下致使套管腐蚀断裂。
Macroscopic examination, XRD, SEM. simulated seawater testing and other methods were used to study the corrosion cracking reasons of an offshoe oil well casing pipe. The results show that the reason causing cracking was due to seawater entering the casing annulus which contained air. Near the surface of the sea, concentration cell was formed, leading to corrosion of the casing pipe in seawater. With the promotion corrosion cracking occurred.
出处
《腐蚀与防护》
CAS
北大核心
2014年第1期102-106,共5页
Corrosion & Protection
关键词
失效分析
油套管
氧浓差电池
腐蚀断裂
failure analysis
oil well casing pipe
oxygen concentration cell
corrosion fracture e oxygen
作者简介
通信作者：孙爱平（1977-），工程师．硕士．从事油田防腐蚀．13670971645．sunaip@cnooc.com.cn
