Walk (Of Bit) : The action of the bit to change the direction of the wellbore by its tendency to turn into the side of the wellbore while rotating. (Bul D20)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}