Abstract
In this study, the failure analysis of P110 steel in low-temperature annular environment of CO2 flooding wells is addressed. Results show that the chemical composition, microstructure, and mechanical properties (including tensile and impact properties) of the P110 steel tubing meet the standard requirements. According to the analysis of corrosion products, the annular environment contains CO2, Cl−, SO42−, and a small amount of S2− (H2S), which can induce stress corrosion cracking (SCC) in the presence of residual stress. The specimen fractures at the tubing, and the fractures are investigated by visual inspection, scanning electron microscopy, and energy-dispersive spectrometry. Three different areas are present on the fracture surface: the crack initiation area, crack expansion area, and the final fracture area. The fracture initiates from the Y-shaped corrosion cracks, which is accompanied by SCC characteristics. The reduction of ductility and toughness may also facilitate SCC of the tubing.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
