By using the elastoplastic finite element method, mechanical model for wear tension and internalpressureresistance of casing joints is set up.
采用弹塑性有限元方法，建立了套管接头磨损拉伸与抗内压的有限元力学模型。
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Viscosity: viscosity is the crude oil in the flow caused by the internal frictional resistance, crude oil viscosity depends on temperature, pressure, dissolved gas and its chemical composition.
Liquids may only be filled into inner packagings which have an appropriate resistance to internalpressure that may be developed under normal conditions of transport.