Clearance 06 : Space between the outer diameter of the tool in question and the side of the drilled hole; the difference in the diameter of the hole and the tool. (Bul D20)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}