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09102 SSC Resistance of High Strength Low Alloy Steel OCTG in High Pressure H2S Environments

Picture for 09102 SSC Resistance of High Strength Low Alloy Steel OCTG in High Pressure H2S Environments
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Product Number: 51300-090102-SG
ISBN: 09102 2009 CP
Author: Kenji Kobayashi, Tomohiko Omura and Masakatsu Ueda
Publication Date: 2009
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SSC resistance of 110 ksi sour grade low alloy steel OCTG was evaluated in highly pressurized H2S environments assuming the application to High Pressure/High Temperature (HPHT) oil and gas fields. The DCB test was selected to numerically evaluate the environmental severity in view of SSC. Effects of H2S pressure and temperature on KISSC values were investigated. Test results showed that the increase in H2S pressure from 0.1 to 1.5MPa decreased KISSC values. KISSC values increased with increasing testing temperature over the range from 24 to 65oC. SSC mechanism in the high pressure H2S environments was discussed in view of corrosion weight loss, structures or chemical compositions of corrosion products formed on the steel surface, and atomic hydrogen absorption and its stability in the steel.

Keywords: sulfide stress cracking, hydrogen sulfide, temperature, double cantilever beam test, hydrogen
SSC resistance of 110 ksi sour grade low alloy steel OCTG was evaluated in highly pressurized H2S environments assuming the application to High Pressure/High Temperature (HPHT) oil and gas fields. The DCB test was selected to numerically evaluate the environmental severity in view of SSC. Effects of H2S pressure and temperature on KISSC values were investigated. Test results showed that the increase in H2S pressure from 0.1 to 1.5MPa decreased KISSC values. KISSC values increased with increasing testing temperature over the range from 24 to 65oC. SSC mechanism in the high pressure H2S environments was discussed in view of corrosion weight loss, structures or chemical compositions of corrosion products formed on the steel surface, and atomic hydrogen absorption and its stability in the steel.

Keywords: sulfide stress cracking, hydrogen sulfide, temperature, double cantilever beam test, hydrogen
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