Thermal production well tail pipe prestress well completion pipe string and well completion method

The invention relates to the technical field of petroleum well cementation and completion, in particular to a thermal production well tail pipe prestress well completion pipe column and a well completion method.The thermal production well tail pipe prestress well completion pipe column comprises an expansion hanger, a tail pipe, a thermal compensator, a ground anchor, a float collar and other well completion tools, the expansion hanger is located at the top of the tail pipe column, the ground anchor is located at the bottom of the tail pipe, and the thermal compensator is located in the middle of the tail pipe; the sealing assembly of the expansion hanger is a metal and rubber double-material composite seal. The anchor flukes of the ground anchor can be opened in a hydraulic state, the anchor flukes and the expansion hanger jointly provide tensile stress for the tail pipe column, tail pipe prestress well completion operation is achieved, lifting stress is applied to the tail pipe column in advance, and the pr