What method does rotary drilling utilize?

Rotary drilling primarily employs a rotating drill bit to efficiently cut through rock and soil. This method consists of a drill bit that is attached to a drill string, which is rotated by a drilling rig. The rotation allows the bit to penetrate the ground, chipping away at the material and removing it from the borehole.

One of the significant advantages of rotary drilling is that it can be used to drill through a variety of geological formations, including hard rock, making it a versatile option in drilling operations. As the bit rotates, drilling fluid is often circulated through the system to cool the bit, carry away the drill cuttings, and stabilize the hole. This approach ensures effective drilling in various conditions and promotes greater penetration rates compared to other methods.

Alternative methods mentioned, such as hammering actions, high-pressure water jets, or static drilling with augers, have their specific applications, but they do not embody the fundamental mechanics of rotary drilling.