LIFTING SYSTEM FOR ULTRA-DEEP VERTICAL WELLBORE Russian patent published in 2021 - IPC B66B15/00 B66B7/10 

FIELD: mining.

SUBSTANCE: disclosed is a lifting system for an ultra-deep vertical wellbore. The system consists of a friction pulley, the left idler pulley, the right idler pulley, the left lift container, the right lift container, balancing cables, a tension control system, sets of split pulleys, steel cables, coils and a steel wire socket. The sets of split pulleys are distributed in a circle around the pulley friction, and the tension of the steel cables is regulated by adjusting the positions of the split pulleys in the sets of split pulleys.

EFFECT: present invention helps to reduce the bending stress of the friction pulley axles and also solves the problem that the bending stress of the friction pulley axles in a conventional friction pulley lifting system is too great. There is no need to install a conventional container tension balancing device, which effectively solves the problem of imbalance caused by the difference in displacement between different steel cables and the high dead weight problem caused by the traditional container tension balancing device.

6 cl, 13 dwg