射孔套管弹性抗挤能力分析

ANALYSIS OF ELASTIC COLLAPSING OF PERFORATED CASING

套管射孔后其抗挤能力将有所降低。建立了射孔段套管弹性抗挤性能分析控制一般方程,并采用摄动理论给出了的孔段套管弹性抗挤能力降低系数一般计算公式。并与方孔精确解比较后得出,摄动法所得近似解具有足够的精度。为进一步开展射孔套管的弹塑性抗挤分析奠定了基础。

The perforated casing is more vulnerable to collapse under external pressure than that without per- forates. This paper gives the elastic differential equa- tion of collapse of perforated casing, and a general for- mula for reduction factor of elastic collapsing by perturba- tion method. Compared with the exact solution of square holes, the perturbation ones are of high precision for elas- tic collapsing of perforated casing.