Bit Hydraulic Horsepower (BHHP) : The hydraulic horsepower equivalent of the gallons per minute and the pressure drop across the bit nozzles. GPM x psi = BHHP 1,714 (Bul D10)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}