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< Natural Gas and Oil > Editorial Department
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China Petroleum Engineering & Construction Corporation
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Overseas Research Center of Research Institute of Petroleum Exploration and Development
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Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
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Issue:ISSN 1006-5539
          CN 51-1183/TE

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    Your Position ：Home->Past Journals Catalog->2013 Vol.6

    Numerical Simulation Analysis on Corroded Casing Residual Strength
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    Key Words： Casing; Corrosion; Residual strength; Circular arc and semilune; Numerical simulation
    Abstract：Corrosion failure of casing is one of key problems in oil and gas field development. Current researches at home and abroad focus on casing corrosion rate and control. Less analytical investigation is conducted on corroded casing residual strength. Adopted is the numerical simulation to analyze circular arc and semilune forms after casing corrosion and analysis results show that residual tension strength increases when circular arc corrosion defect length increases，residual collapsing strength and residual internal pressure strength decrease when circular arc corrosion defect length increases，residual tension strength increases when semilune corrosion defect length increases，residual collapsing strength decrease when circular arc corrosion defect length increases, residual internal pressure strength and residual tension strength decreases linearly when semilune corrosion defect length increases and residual tension strength, residual collapsing strength and residual internal pressure strength increase when casing wall thickness increases.
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