DRILLING RIG Russian patent published in 1994 - IPC

FIELD: drilling equipment. SUBSTANCE: drilling rig includes base, rotary platform, frame of feeder, adjusted hydraulic drive or electric drive of feed, carriages with swivel head and supplementary drive of feed, means for orientation of frame of feeder in space, differential- planetary gear, stoppers, hydraulic lock. Carrying shafts and wheels of differential planetary gear are connected with flexible driving elements and traction element is attached to carriage or put into grooves of wheels of supplementary drive of feed, driven wheels of carrier, wheels mounted in lower part of frame of feeder and rotary platform and wheels put on axle of rotary rollers. EFFECT: enhanced operational reliability. 5 dwg