Temporary plugging device for gas well tie-back cementing

The utility model relates to the field of oil extraction engineering in oil fields and belongs to a mechanical temporary plugging device for a high pressure gas well, aiming at solving the problem that junks formed during the unplugging of a temporary plugging device can block and fracture the channel. The mechanical temporary plugging device mainly comprises a preset working barrel 1, a throwing and dragging joint 2, a sealing section 3, a positioning body 4 and a guiding head 5, wherein the sealing section 3 is arranged at the lower end of the throwing and dragging joint 2 in a sleeving way, and the throwing and dragging joint 2 and the positioning body 4 are connected by trapezoidal thread, thereby realizing the axial positioning of the sealing section 3; and the throwing and dragging joint 2 and the guiding head 5 are connected by trapezoidal thread. The mechanical temporary plugging device is mainly used in a temporary plugging process for the tie-back cementing and has the advantages of simple structure