LARGE-DIAMETER WELL CASING COMPLEX Russian patent published in 2011 - IPC E21D5/00 

FIELD: mining.

SUBSTANCE: large-diameter well casing complex includes grating platforms and gear wheel, which are fixed on skis, drilling machine installed on manipulator and moving in circumferential direction. At that, rod in upper part has attachment lug for hoisting line and canopy for ensuring safe works, and in lower part - crosspiece on the ends of which there fixed are skis for downward movement of complex along the well. Besides, manipulator is installed so that it can be rotated along gear wheel and provides circumferential drilling of bore pits, and control panel is located on grating platform above drilling machine.

EFFECT: improving working conditions of mine workers; ensuring safe mine works.

4 dwg