The Atlas Copco DM-M3 is a crawler mounted, hydraulic tophead drive, multi-pass rotary drilling rig primarily designed for deep drilling of overburden for cast blasting and is used at several of the largest coal mines in the world. The Atlas Copco DM-M3 has an onboard depth capability of 200 ft (61 m) using 10¾ in diameter drill pipe and up to 240 ft (73 m) using 8 5/8 in diameter drill pipe with a 5-rod carousel. Weight on bit is rated at 90,000 lbf (400 kN) using a patented hydrostatic, closed loop system acting through twin, double rod hydraulic cylinders and cable.
|Hole diameter||9 7/8 - 12 7/32 inch (251 - 311 mm)|
|Weight on bit||90000 lb (40800 kg)|
|Maximum hole depth (m, ft)||200 - 240 ft (61 - 73.2 m)|
|Estimated weight||230000 lb (104 t)|
|Drilling method||Rotary and DTH - Multi pass|
|Single pass depth||37 ft (11.3 m)|