Oleophilic sulfonated asphalt
Drilling fluids agent Consatone ®

Filtration and fluid-loss control, stabilization of water-based or oil-based drilling fluids
Shale stabilizer, fluid loss reducing agent

Oleophilic sulfonated asphalt is used in oil-based drilling fluids. Designed specifically to solve problems associated with wellbore and shale stabilizer instability, rock softening and shedding, and plugging of microcracks.

Resistant to major drilling fluid contaminants and resistant to temperatures up to 400 °F (204 °C).


Particle size
0–2 mm

Specific gravity

Powder from brown to dark brown

25 kg three-layer paper bags with inner lamination or polypropylene bags with liner.

Fields of application and purpose

Reduces high temperature filtration.

Shale stabilizer.

Improves well hole stability.
Thermally stable up to 400 °F (204 °C).

Seals microfractures and clays.

Improves filter cake quality.

Rates and recommendations

The standard concentration of sulfonated asphalt for shale stabilization is from 5 to 30 kg/m3.

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