Chrome Lignite
Chrome Lignite is selected lignite material which has been solubilized with caustic soda and chromium salt. It is a fine dry free-flowing powder and readily disperses in the drilling mud. Chrome Lignite is highly soluble and is stable at high temperature. It exhibits tolerance for soluble contaminants. It was more temperature-stable than plain lignite in clay-based water muds.
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Benefits
- 1. Filtration Control
- Reduces API and HTHP fluid loss by forming a thin, tough, and low-permeability filter cake.
- Controls filtrate invasion into permeable formations.
- 2. Rheology Modification (Thinning Agent)
- Acts as a chemical thinner, reducing plastic viscosity (PV) and yield point (YP).
- Helps maintain stable and manageable mud rheology.
- 3. High-Temperature Stability
- Working temperature up to 350°F – 400°F (175°C – 200°C).
- Prevents thermal breakdown of mud properties in deep, high-temperature wells.
- 4. Dispersant Action
- Improves dispersion of solids and prevents flocculation of clay particles.
- Maintains a stable mud system even with high solids loading.
Specification
| Parameters | Test Results |
|---|---|
| Appearance | Dark brown to black free-flowing powder |
| Moisture Content | 10% Max. |
| Bulk Density (g/cc) | 0.40 – 0.65 |
| Particle Size | 90% passing 40 mesh |
| pH (2% Solution) | 9.5 Min. |
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