Water-Base Drilling Fluid : Common conventional drilling fluids. Water is the suspending medium for solids and is the continuous phase, whether or not oil is present. (Bul D11)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}