Journal
ANTI-CORROSION METHODS AND MATERIALS
Volume 67, Issue 5, Pages 453-463Publisher
EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/ACMM-04-2020-2296
Keywords
Failure analysis; 110 steel; Downhole tubing; Stress corrosion cracking
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Funding
- National Key Research and Development Program of China [2018YFB0605502]
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Purpose This paper aims to analyze a failure case of a P110 tube in a CO(2)flooding well. Design/methodology/approach The chemical composition, microstructure and mechanical properties of the failed P110 tubing steel were tested, and met the API Spec 5CT standard. The fractures were investigated by scanning electron microscopy and energy dispersive spectroscopy. Findings Fracture was induced by stress corrosion cracking (SCC) and that the stress concentration caused by the mechanical damage played an important role in the failure. The failure case is a SCC failure affected by mechanical damage and galvanic corrosion. Originality/value The effect of the infiltration of groundwater was studied in the failure case. The stress concentration caused by the mechanical damage played an important role in the failure.
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