Rotary Air Blast (R.A.B.) Drilling

Rotary Air Blast Drilling is used when you want a quick inexpensive hole to obtain a sample of decent quality. Is normally used for shallow applications such as Gravel searches or Bedrock probing.

A hole is drilled down with either a Tricone Rotary bit or a conventional down hole hammer. The drill pipe is a conventional single passage pipe with the air travelling down the inside of the pipe and the sample travelling up the outside between the pipe and the hole.