【摘要】 利用弹性力学理论推导出了非均匀地应力条件下套管-地层系统的位移场、应力场和套管载荷的解析表达式。将非均匀地应力分解为均匀地应力和偏差地应力两部分,并用弹性力学方法分别对其进行求解,得出理论解,最后将两部分叠加得到非均匀地应力条件下的套管-地层系统的位移场、应力场和套管载荷。应用实例表明,套管径向压力载荷图形的长轴指向地应力场的最小主压应力方向。更多还原

【Abstract】 The analytic formulas for displacement field and stress field of formation as well as the casing loading in a casing-stratum system under non-uniform ground stress were deduced in terms of elasticity theory.The non-uniform ground stress can be decomposed into mean part and partial part.Then the problem of casing loading can be decomposed into two easier problems,which can be separately solved.The solutions of two problems can be composed together to get the final result.An example shows that the long axis of the casing pressure figure directs to the minimum principal compression stress.更多还原