Provides multiple benefits

SACK BLACK shale inhibitor additive is a partially water-soluble, water-dispersible, coupled gilsonite used to assist in reducing: HPHT fluid loss, dynamic fluid loss, torque and drag, and filter-cake thickness. The coupler enhances the additive’s wettability in water-base fluids and requires no additional coupler when added to a mud system.

Easy to use

The free-flowing powder goes direction to the mud system through the mixing hopper. SACK BLACK additive is ~80% non-soluble in water and therefore remains in a particulate phase in the mud system, becoming a malleable solid that deforms as needed to seal microfractures in shales and to reduce filtrate invasion in sands.

Case Studies


Shale Inhibitor

Partially water-soluble, water-dispersible, coupled gilsonite.