Low Specific Gravity Solids : Salts, drilled solids of every size, commercial colloids, lost circulation materials; i.e., all solids in drilling fluid, except barite or other commercial weighting materials. (Bul 13C)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}