Definition(s)
High Specific Gravity Solids
Solids added to a drilling fluid specifically to increase drilling-fluid density. NOTE Barite (specific gravity = 4,2) and haematite (specific gravity = 5,05) are the most common.
Source: API RP 13C, Recommended Practice on Drilling Fluids Processing Systems Evaluation, Upstream Segment, Fourth Edition, December 2010. Global Standards