摘要
通过宏观分析、化学成分分析、力学性能试验、金相分析和腐蚀产物分析,结合服役工况,对注水井采油树测试阀腐蚀原因进行了分析。结果表明:测试阀的化学成分和力学性能试验结果满足API Spec 6A—2018标准要求;测试阀内壁腐蚀产物主要由FeCO_(3)、FeS、Fe_(2)O_(3)和CaCO_(3)组成。测试阀腐蚀为溶解氧腐蚀、CO_(2)腐蚀和细菌腐蚀共同作用的结果。
Corrosion cause analysis of production tree test valve in a water injection was carried out through macrograph observation, chemical composition analysis, mechanical properties testing and corrosion products composition anylysis, combined with its working conditions. The result indicates that the chemical composition and material properties of the test valve meet the requirements of API Spec 6 A—2018 standard. Corrosion products in the inner wall of the test valve consists of FeCO_(3)、FeS、Fe_(2)O_(3) and CaCO_(3). The corrosion of the test valve was the synergistic effects of dissolve oxygen corrosion, CO_(2) corrosion and bacterial corrosion.
作者
吉楠
宋文文
邢星
赵密锋
邝献任
JI Nan;SONG Wenwen;XING Xing;ZHAO Mifeng;KUANG Xianren(State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China;Oil and Gas Engineering Research Institute,PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000,China)
出处
《石油管材与仪器》
2021年第6期90-93,共4页
Petroleum Tubular Goods & Instruments
关键词
注水井
采油树测试阀
溶解氧腐蚀
CO_(2)腐蚀
细菌腐蚀
water injection well
production tree test valve
dissolve oxygen corrosion
CO2 corrosion
bacterial corrosion
