油套管抗挤毁性能的初始后屈曲理论分析

Theoretical Study on the Collapse Property of Casing

抗挤毁性能是油套管的一项至关重要的性能指标．椭圆度和壁厚不均是存在于油套管中的初始微小几何缺陷．运用Koiter初始后屈服理论分析承受均匀外压力的长薄壁油套管的后屈曲性态及其缺陷敏感性，得出承受均匀外压力的长薄壁油套管具有后屈曲稳定性的结论．

Koiter's Initial Postbuckling Theory is applied to analyse the long thin-walled casing under uniform external pressure, from which it is concluded that the long thin-walled casing under uniform external pressure owns postbuckling stablity.