分析了套管柱在高压工艺条件下的受力状况，并给出了计算公式。实施压裂、酸化或注水而形成的高压差和高温差，会使井口处套管和水泥面处套管的受力发生突变。在采用环室或光油管压裂、酸化或注水时，套管处于直接承压状态，其中井口处套管受压力效应、温度效应和重力的综合影响；水泥面处套管则受到附加轴向载荷的作用。通过实际井例进行了计算和验证。在此基础上，提出了采用封隔器管柱保护套管的途径。此外，还对封隔器管柱作了受力分析。 The stress condition of casing string under high pressure was analyzed and the calculation formula was given. Implementation of fracturing, acidification or water injection to form the high pressure and high temperature difference, will make the wellhead casing and cement surface casing force mutation. In the use of ring chamber or oil pipe fracturing, acidification or water injection, the casing in a direct pressure state, where the casing at the wellhead by the pressure effect, the temperature effect and the combined effect of gravity; casing surface by the additional axial The role of load. Calculated and validated by actual well example. On this basis, the way to protect casing with packer pipe string is proposed. In addition, packer column was subjected to force analysis.