【摘要】 根据弯曲梁理论，建立了套管柱受非均布外挤压力作用的力学模型；并应用解超静定问题的正则方程和力法准则对该力学模型进行求解，得到了在非均布外挤压力作用下套管圆周上的弯矩、剪力、轴力、应力和位移的分布规律。计算表明，在非均布外挤压力作用下，套管抗挤毁强度大大降低。该力学模型不仅可以解释深井套管挤毁机理，而且可以改进深井套管抗挤强度设计。更多还原

【Abstract】 According to bending theory , the authors set up the casing mechanical model under nonuniform collapse ,which is solved by using canonical equation and the distribution of bending moment,shear force,axial force,stress and deformation on the circumference of casing under nonuniform collapse.Calculation shows that the casing collapse resistance decreases greatly under nonuniform loads.Model not only shows good casing collapse mechanism,but also can improve casing collapse resistance design.更多还原