Build Angle 1 : The act of increasing the inclination of the drilled hole; the rate of change (degrees/100 ft.) of the increasing angle in the hole. (Bul D20)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}