BENTONE^® 990

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. This allows the formulation of low viscosity muds with undiminished penetration rates and cuttings removal.

BENTONE 990 can be used alone or in combination with conventional organoclay gellants.The solids suspension capacity of a fluid which is already thickened with an organoclay can be increased by the addition of BENTONE 990, without substantially increasing the viscosity of the system.

Key properties

• Effectively suspends weighting materials and other solids
• 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
• Increases the suspension of solids in fluids thickened with organoclay gellants
• Has little effect of filtration; this must be controlled separately

Functions

Market segment

• Energy

Application

• Drilling Fluid Additives