Research news on rotary drilling

Rotary drilling is a boring method in which a rotating drill bit, driven by surface or downhole power, mechanically cuts and grinds rock or unconsolidated formations while drilling fluid circulates through the drill string and annulus. The fluid cools and cleans the bit, stabilizes the borehole, and transports cuttings to the surface. Rotary systems typically employ a bottom-hole assembly with drill collars and stabilizers to control trajectory and weight on bit, and may use roller-cone or fixed-cutter bits. The method underlies most modern oil, gas, and geothermal well construction and is compatible with directional and horizontal drilling technologies.