Rotary drilling rig process

A rotary drilling rig works by rotating a drill string, which applies downward pressure to a drill bit that grinds the earth. Drilling fluid or air is pumped down the drill string to cool the bit, carry cuttings to the surface, and stabilize the borehole. [pdf]

Drilling rig parts in usa

Buy drilling equipment, drilling supplies and spare parts for Reverse Circulation (RC), Down The Hole (DTH) and geothermal applications. Hammers, drill bits, pipes and more. [pdf]