High Specific Gravity Solids : In the petroleum industry, this usually refers to the barite solids (could be Galena or other solids more than 4.2 specific gravity). (Bul 13C)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}