非均匀地应力作用下套管与水泥环的受力分析

ANALYSIS OF LOADING PROPEKTY OF CASING AND CEMENT SHEATH UNDER NONUNIFORM GEOLOGIC STRESS

以地层－水泥环－套管组合系统为研究对象。以弹性力学为基础。对套管及水泥环在理想状况下受非均匀地应力和均匀内压共同作用时的受载特性进行了分析，并依据不同的接触条件推导出相应的线性代数方程组。借助于计算机计算出不同地应力作用下套管、水泥环内部应力及表面受力分布，并可分析水泥环弹性模量及厚度、套管壁厚、水泥环与套管的接触状况等因素对套管及水泥环受力分布的影响。

This paper discusses the stress of casing and cement sheath by studyin g thecombining system of stratum-cement sheath-casing, which is subject to nonumi form geologic.stress on the outer surface and hydrostatic pressure on the inner surface,Some groups oflinear equations for different contact conditi ons are deduced based on elasticity.