DRILLING RIG WITH TELESCOPIC MAST Russian patent published in 2023 - IPC E21B7/02 E21B15/00 E21B19/08 

FIELD: drilling equipment.

SUBSTANCE: invention is intended for use in installations for drilling water wells and engineering wells for various purposes. The drilling rig comprises a base with a mast fixed on the axis, consisting of a fixed section and a movable section moved relative to it, equipped with a carriage with a rotator and a feed mechanism made in the form of a chain hoist driven by a feed hydraulic cylinder. The chain hoist is equipped with rollers mounted on the movable section and upper and lower branches mating with them, located symmetrically with respect to the axis of the movable section. The mast sections have a closed loop in cross section and are equipped with carriages that ensure parallel movement of the movable section along the fixed one. The feed hydraulic cylinder is placed in the cavity of the movable section and is fixed with its lower part on a bracket made in the lower part of the fixed section, and its rod is connected to the upper part of the movable section. The upper branches of the chain hoist are fixed at one end on the upper part of the fixed section or on the specified bracket, and at the other end on the rotator in the same plane with the axis of rotation of its shaft or on the carriage without being aligned with the axis of rotation of the rotator shaft. The lower branches of the chain hoist are fixed at one end on the upper part of the fixed section, and at the other end on the rotator carriage.

EFFECT: increased reliability of the installation and reduction of its mass.

2 cl, 5 dwg