MUD ROTARY DRILLING

Mud rotary drilling is a method of drilling that can be useful for deeper boreholes allowing for less torque on the drilling equipment as compared to auger drilling. 

With mud rotary drilling, a drill bit is attached to the drill rods and lowered into the ground. As the drill bit rotates, a high pressured mud mixture is pumped down through the drill rods and out the bottom of the drill bit. The mud mixture serves multiple purposes, including cooling the drill bit, carrying the drill cuttings up and out of the borehole and stabilizing the walls of the borehole. 

Some benefits of mud rotary drilling is its ability to drill through hard soils and rock formations and is able to reach deeper drilliing depths compared to augers. The mud mixture acts as a lubricant reducing friction in the borehole allowing for smoother drilling.