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

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.