Suspension additive for oil-based drilling fluids
BENTONE 990 rheological additive is an organophilic amino-attapulgite which controls the settling of solids in oil-based drilling muds and other drilling fluids. BENTONE 990's unique rheological structure suspends weighting materials and other solids with less increase in viscosity and gel strength than conventional bentonite or hectorite based organoclays.
Key Properties
• Effectively suspends weighting materials and reduces sag at all temperatures • Controls settling with minimal increases in viscosity and gel strength • Reduces top separation of oil • Maintains suspension over a wide range of water contents • Maintains suspension over a wide temperature range up to 400F • Increases the suspension of solids in fluids thickened with organoclay gellants
