Turn 7 : Change in bearing of the hole. Usually spoken of as the right or left turn with orientation that of an observer who views the well course from the surface site. (Bul D20)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}