REVERSE CIRCULATION (RC) DRILL

A reverse circulation drill is a specialized drilling system commonly used in mineral exploration and water well drilling. In this method, drilling fluid is forced down the drill pipe, circulates through the bit, and then carries cuttings back up to the surface through the annular space between the borehole wall and the drill pipe. This reverse circulation of drilling fluid efficiently transports cuttings, making the process highly effective for sampling and recovering materials from the subsurface.