Percussion Rotary Air Blast Drilling (RAB)

RAB drilling is utilized primarily for mineral mining.

The usage of air compressors that induce on 900-1150 cfm of air at 300-350 psi down the pit ensures drilling of a hole up to ~1250 m due to air pressure that compels on all rock cuttings and some other water. The cuttings gathered in the surface and are blown up the exterior of the sticks. Air or a mix of air and foam raise the cuttings. RAB drilling is utilized in the mineral mining industry. (This instrument is also called a Down-the-hole drill) The tungsten buttons would be the bit's surface.

RAB drilling is utilized primarily for mineral mining, water supply drilling and blast-hole drilling, in mines in addition to different programs like technology, etc... Quality samples that are lower are produced by RAB since the cuttings are blown up the exterior of the sticks and may be infected from contact with rocks. RAB drilling in thickness that is extreme, in case it encounters water, can clog the exterior of the hole precluding removal of drill cuttings. This may be counteracted, but by means of both "stabilizers" also called "reamers", that can be large cylindrical parts of steel attached to the drill string, also designed to perfectly match the dimensions of the hole being drilled. All these have sets of pliers on the side using tungsten buttons, so that break down cuttings.