LIFTING SYSTEM OF DRILLING INSTALLATION Russian patent published in 2018 - IPC E21B19/00 B66D1/36 

FIELD: machine building.

SUBSTANCE: invention relates to engineering, in particular to drilling rigs for operational and exploratory drilling of oil and gas wells. Lifting system of drilling rig includes winch with working and emergency brakes, rope thrown over crown block and travel block, roller rope restorer containing fixed rolling pin, rollers with axes, between which gap is missing with gap, having possibility of limited movement of locks along rolling pin. Rope dampers provided with additional upper roller with arrangement of roller axes centers in plan on vertices of right-angled triangle between two parallel jaws with guaranteed clearance. Axes of rollers in the plan, located on tops of sharp corners, are rigidly connected with jaws, and third roller is mounted on rolling pin, axis of which is located at right angle apex. Rope damper center of mass is in its upper part in the opposite side from rolling pin with respect to rope.

EFFECT: technical result consists in preventing weakening of movable branch of wireline rope in drum and breaking of rope winding on drum during emergency braking of winch.

3 cl, 5 dwg