Well cementation rubber plug positioning device and method

The invention belongs to the technical field of well cementation, and discloses a well cementation rubber plug positioning device and method. The device is erected on a sleeve and comprises a shell, a line concentration assembly, a rubber plug and a rotary counting assembly, and the shell is erected on the ground and arranged above the sleeve; the line concentration assembly is arranged in the end, away from the sleeve, of the shell, and multiple layers of connecting lines are wound on the line concentration assembly so that the connecting lines can be borne and released; the rubber plug is arranged at the free end of the connecting line and can drive the connecting line to move in the axis direction of the sleeve. The rotary counting assembly comprises a rotating piece and a counting piece, the rotating piece is rotationally connected to the shell and arranged between the line concentration assembly and the sleeve in the axis direction, the connecting line is wound around the rotating piece in a single layer