ELECTROMECHANICAL DRILLING RIG WITH REVERSE BOREHOLE AIR CIRCULATION Russian patent published in 2023 - IPC E21B7/00 E21B25/00 

FIELD: drilling equipment.

SUBSTANCE: invention can be used for core drilling of wells in the snow-firn layer of glaciers in the Arctic and Antarctic. An electromechanical drilling tool with reverse bottom-hole air circulation includes a drill bit, a core pipe, a sludge collection filter, an electrical compartment, a spacer device, and a cable lock. The sludge collection filter consists of a pipe, in the upper part of which a cyclone filter is rigidly fixed, to the bottom of which a sludge collection tank is removably attached. An air flow sensor is rigidly fixed in the outlet pipe of the cyclone filter, and a motor turbine with a brush collector assembly is rigidly fixed in the sludge collection filter pipe above the air flow sensor, opposite which there are outlet windows. An electric motor with frequency control is rigidly fixed in the electrical compartment.

EFFECT: increase in the efficiency of core drilling of the snow-firn horizon.

1 cl, 2 dwg, 2 ex