Treated Bentonite for Drilling Fluids
CAS Number: 1302-78-9
Treated bentonite is a sodium montmorillonite clay mineral that serves as the primary viscosifier and filtration control agent in water-based drilling fluid systems. API-grade treated bentonite hydrates readily in freshwater to build yield point and gel strength for cuttings suspension, with a yield of ≥91 bbl/ton. It forms a flexible, low-permeability filter cake on the borehole wall during drilling operations.
Technical Specifications
| appearance | Off-white to gray free-flowing powder |
| API yield (bbl/ton) | ≥91 |
| moisture content (%) | ≤10 |
| API filtrate (mL/30 min) | ≤15 |
| screen residue on 75 μm (%) | ≤4.0 |
Applications
- Water-based drilling fluid viscosity and gel strength building
- Borehole wall filter cake formation
- Drill cuttings suspension during static periods
- Shallow well freshwater-based drilling systems
- Geotechnical and water well drilling
Key Features
- API-grade high-yield bentonite meeting ISO 13500 standard
- Rapid hydration in freshwater for quick mud buildup
- Forms flexible, thin filter cake for wellbore protection
- Cost-effective primary viscosifier for freshwater mud systems
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