HOLE DRILLING RIG WITH IN-BUILT INTERNAL DEVICE TO LIFT AND LOWER AGGREGATE OF CRACK-ANDWORK BLOCK Russian patent published in 2019 - IPC E21B7/02 E21B15/00 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to cluster drilling rigs for production and exploratory drilling of oil and gas wells. Cluster drilling rig with built-in device for lifting and leveling of hoist-and-hoist unit, comprising above-winch unit, comprising base and derrick, movement mechanism, containing truck with wheels, supports, lifting and leveling device, including hydraulic cylinders with piston with rod, equipped with retainer and having possibility of interaction with support. Plant is equipped with paired hydraulic cylinders with external jackets, made in form of barrel with central hole mating stem with possibility of limited axial movement between upper stop of hydraulic cylinders and bogie or rod stop with possibility of alternate interaction with them, wheels are installed between casings of coupled hydraulic cylinders, and hydraulic cylinder retainer is made in the form of wedges installed in grooves of casings with conical surface, made with mating wedges interacting with hydraulic cylinders.

EFFECT: reduced labor intensiveness and duration of erection-dismantling and lifting-lowering of hoisting-and-hoisting unit.

3 cl, 12 dwg