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    基于ISO 13679的套管特殊螺紋極限承載能力仿真評價

    ISO 13679-based Simulation Evaluation of Ultimate Bearing Capacity of Casing Premium Connection

    • 摘要: 依照ISO 13679∶2002標準中的極限試驗程序，采用Abaqus有限元分析軟件，評價了Φ177.8 mm×10.36 mm規(guī)格P110鋼級套管JIP特殊螺紋的極限承載能力；建立特殊螺紋的有限元模型，仿真計算JIP新型套管特殊螺紋接頭在8種極限載荷失效路徑下的失效情況。分析結果表明：該套管接頭在各工況下的應力分布合理，管體先于接箍失效，且失效強度大于API標準值；接觸應力和密封積分強度均保持較高水平，接觸應力在693.2～1 042.4 MPa，密封積分強度維持在667.0～1 050.0 MPa·mm；該JIP特殊螺紋的強度滿足使用要求，密封效果良好。

       

      Abstract: Following the limit testing procedure as specified in ISO 13679:2002, the ultimate bearing capacity of the Φ177.8 mm ×10.36 mm P110 JIP new type casing premium connection is evaluated with the Abuqus FEA software.The FEA model for the casing premium connection is established with which simulation computation of the failures of the JIP new type casing premium connection in eight ultimate loading failure ways is performed.Result from the analysis reveals that the stress distribution of the said casing premium connection is reasonable under different work conditions;the pipe body failure takes place prior to that of the coupling, and the failure strength is higher than the API-specified value;and both the contact stress and the seal integral strength are maintaining a rather high level, i.e., the contact stress:693.2~1 042.4 MPa, and the seal integral strength:667.0~1 050.0 MPa·mm.The said new type premium connection has its strength up to the operation requirement, showing excellent sealing effectiveness.

       

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