Case Study SACK BLACK enhances high performance WBM, eliminates casing (Alaska)
The well was drilled with no losses, stuck pipe or wellbore stability problems.
Asphaltite shale Inhibitor
SACK BLACK shale inhibitor additive is a partially water-soluble, water-dispersable, coupled Gilsonite. It helps reduce HPHT and dynamic fluid losses, torque, drag, and filter-cake thickness. The coupler enhances inhibitor wettability in water-based fluids and requires no additional coupler when added to a mud system.
The free-flowing powder is added directly 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.