With the improvement of the production and manufacture technology of casing, the actual collapse strength of casing cannot be accurately calculated by present API 5C3 formula.
With finite element method, the collapse strength of casing with ovality and eccentricity under unidirectional uniform and ellipse distributive force was calculated and analyzed.
采用有限元法,计算和分析了壁厚不均与椭圆套管在单向均匀和单向椭圆分布外挤力作用下的强度问题。
The proposal model of the high collapse strength in this paper can't only provide the given reference for the present high collapse strength, but also improve the casing manufacturing quality.
Study on the decrease of the collapse strength caused by casing inside worn was done with finite element analysis (FEA). The calculation result was compared with that of a full scale physical test.