Basic parameters Nominal drilling depth 4 000 m (114 mm drill pipe) Maximum load 2 250 kN ( 250 ton ), API Spec 8A/8C Power supply 600 VAC /50 Hz (optional 60Hz) Rated current 445 A high current 770 A Drilling parameters range of rotation 0 〜180 r/min Back clamp clamping range 87 ~ 200 mm … Continue reading Beijing Petroleum|BPM Top Drive DQ40BCQ