Which drilling method is defined by the rotation of the bit to cut rock?

Which drilling method is defined by the rotation of the bit to cut rock?

• A. Percussive Drilling
• B. Milling
• C. Rotary Drilling
• D. Diamond drilling

Answer: (C)

Rotary drilling is defined by rotating the drill bit to cut rock. As the bit turns, it shears and fractures the rock to create a borehole, with drilling fluid circulated to cool the bit, carry cuttings to the surface, and keep the hole clean. This continuous rotation distinguishes it from percussive drilling, which relies on hammer blows to break rock rather than sustained rotation. Milling involves removing material with cutters, often for shaping or enlarging openings rather than standard borehole drilling, while diamond drilling uses a diamond-tipped bit within a rotating system but the defining feature here is the rotation to cut rock, which points to rotary drilling.

Rotary drilling is defined by rotating the drill bit to cut rock. As the bit turns, it shears and fractures the rock to create a borehole, with drilling fluid circulated to cool the bit, carry cuttings to the surface, and keep the hole clean. This continuous rotation distinguishes it from percussive drilling, which relies on hammer blows to break rock rather than sustained rotation. Milling involves removing material with cutters, often for shaping or enlarging openings rather than standard borehole drilling, while diamond drilling uses a diamond-tipped bit within a rotating system but the defining feature here is the rotation to cut rock, which points to rotary drilling.