Lignite Powder
Lignite Powder is a fine, water-dispersible form of naturally occurring lignite, primarily used as an additive in water-based drilling fluids (WBM).It is a humic substance-rich material that helps improve fluid-loss control, wellbore stability, and rheological properties of drilling muds.
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Use :
- (a) Fluid Loss Control
- Forms a thin, compact filter cake on the wellbore wall
- Reduces API and HTHP fluid loss
- Protects the formation from excessive filtrate invasion
- (b) Rheology Adjustment
- Mildly thins the drilling fluid
- Helps control plastic viscosity (PV) and yield point (YP)
- Prevents mud from thickening under static conditions
- (c) Shale and Clay Stabilization
- Coats shale and clay surfaces
- Reduces hydration and swelling
- Minimizes wellbore instability in reactive formations
- (d) Dispersant Action
- Keeps drilled solids suspended in mud
- Prevents flocculation and sedimentation
Specification
| Parameters | Test Results |
|---|---|
| Moisture | 15.0% (Maximum) |
| Caustic Solubility | 60.0 (Maximum) |
| Pass through 40-mesh | 90% (Minimum) |
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