DRILLING BIT LOADING COMPLEX Russian patent published in 2002 - IPC

FIELD: mining, particularly, equipment for well drilling. SUBSTANCE: drilling bit loading complex includes device of module type assembled of separate modules whose bodies are combined by reactive subs with formation of cylinder block. Each cylinder has piston connected via driving shaft to drilling bit. Pistons delimit high- and low-pressure chambers connected respectively with intrapipe and annular spaces. Body is connected with drill collar string, and hollow rods of cylinder blocks interconnected between each other and driving shaft by safety couplings having holes for communication with intrapipe space of hollow rods and driving shaft. EFFECT: extended process potentialities and higher operating characteristics. 1 dwg