HOLE DRILLING DEVICE Russian patent published in 2003 - IPC

FIELD: mining industry; applicable in drilling of vertical holes in loose, poorly coherent and porous rocks. SUBSTANCE: device has rock-cutting drilling tool suspended through cable socket on load-carrying cable, direct reducer secured between drilling tool and electric motor, winch with wound load-carrying cable, electric power source. Device is additionally provided with the following components located on one axle: reverse reducer installed on the other end of electric motor, hole reamer, bracer and drill collar. Reamer is made in the form of conical auger with flanges fortified with hard alloy. Conical auger is rigidly connected with reverse reducer. Drill collar is joined with bracer with the help of radial thrust bearings. Drilling tool is made in the form of conical auger with flanges fortified with hard alloy. EFFECT: two-fold increase of device efficiency. 1 dwg