低Cr經(jīng)濟型抗腐蝕油套管的開發(fā)與腐蝕試驗研究

Development of Economical Low Chromium Anti-corrosion Tubing/Casing and Relevant Corrosion Test Study

摘要: 介紹了CS80-3CrSS經(jīng)濟型抗腐蝕油套管的研發(fā)及應用情況；在模擬油田CO₂腐蝕環(huán)境下，研究了不同腐蝕影響因素對N80Q鋼和CS80-3CrSS鋼的作用規(guī)律，利用掃描電鏡研究了N80Q鋼和CS80-3CrSS鋼腐蝕產(chǎn)物膜的特征；CS80-3CrSS鋼的管體和接箍均通過抗SSC試驗。結(jié)果表明：CS80-3CrSS經(jīng)濟型抗腐蝕油套管產(chǎn)品各項性能指標良好，適用于中/輕度CO₂腐蝕環(huán)境或CO₂、H₂S共存腐蝕環(huán)境下的油氣田。

Abstract: Elaborated in the paper are the R&D and application of the economical CS-3Cr80SS anti-corrosion tubing/casing.With the simulated oil field CO₂ corrosive environment, the regularity of corrosive effects by various factors on the N80Q steel and CS80-3CrSS steel is studied.Also studied with the SEM are the characteristics of the corrosion product film of these two steels.And both the pipe body and coupling as made of the CS80-3CrSS are SSC tested.The study result shows that since all of their product performance indexes are very good, the economical CS80-3CrSS anti-corrosion tubing/casing are suitable for gas/oil fields with medium/light CO₂ corrosive level environment or CO₂ &H₂S co-existing corrosive environment.