夾雜物對套管抗硫化氫應(yīng)力腐蝕性能的影響

Effect of Inclusions on Hydrogen Sulfide Stress Corrosion Resistance of Casing

摘要: 對套管硫化氫應(yīng)力腐蝕A法試驗(yàn)的早期斷裂試樣進(jìn)行了分析。結(jié)果表明：B類條形氧化鋁類夾雜物可引起硫化氫應(yīng)力腐蝕A法試驗(yàn)早期斷裂失效；表面及內(nèi)部B類夾雜物形成的魚眼型白點(diǎn)，均可成為裂紋源；D類球形氧化物夾雜作為裂紋源可引起硫化氫應(yīng)力腐蝕A法試驗(yàn)斷裂失效；改進(jìn)煉鋼工藝，采取各種措施減少夾雜物數(shù)量是提高抗硫套管硫化氫應(yīng)力腐蝕A法試驗(yàn)通過率的重要途徑之一。

Abstract: Analyzed is the casing sample with early-stage failure under the Method A test of hydrogen sulfide stress corrosion.The analysis reveals that Type B aluminide strip-inclusion may lead to early-stage failure of the sample under Method A test of hydrogen sulfide stress corrosion;Type B inclusions presenting as flakes on the sample surface or inside the sample are regarded as potential crack sources;and likely, Type D spherical inclusions as crack sources may also cause sample failure under Method A test of hydrogen sulfide stress corrosion;It is regarded that one of the major approaches to enhancing the qualifcation rate of the Method A test of hydrogen sulfide stress corrosion of the SSC casing is improving the steel-making process by means of various measures for reducing inclusion quantities.