RC is a drilling method widely used all over the world. This method is indispensable in areas where there is no water or it is too expensive, for example, in Australia, Africa, Northern Canada or in northern Russia.
RC drilling today produces samples of high quality and reliability. Dual-pipe RC drilling utilizes double drill rods where air is passed down the hole through the outside annulus and into the hammer. Drill cuttings are cleared from the bit by the air and travel up through the centre tube of the drill rods remaining free from contamination.
