Drilling Fluid
Gilsonite in Workover and Completion Fluids
Workover and completion operations use fluids that must control the well without damaging the reservoir. Gilsonite can play…
HPHT fluid loss control and shale stabilizer for oil-based and water-based drilling muds.
Key benefits
- Reduces HPHT fluid loss
- Stabilizes shale and micro-fractures
- Reduces torque, drag and sticking
- Stable above 150 °C
Product overview
Drilling fluid grade gilsonite is milled to about 200 mesh and supplied in several softening point ranges. At downhole temperature the particles soften and seal pores and micro-fractures, reducing HPHT fluid loss, stabilizing shale and adding lubricity.
Applications
- Oil-based and synthetic muds
- Water-based muds (with dispersant)
- Lost circulation pills
- Horizontal and HPHT wells
Technical data
Data sheet
Drilling Fluid Grade Gilsonite
| Property | Typical value | Test method |
|---|---|---|
| Appearance | Black, shiny powder | Visual |
| Softening point (R&B) | 160 – 220 °C (grades) | ASTM D36 |
| Ash content | 3 – 8 % | ASTM D3174 |
| Solubility in TCE | 95 – 99 % | ASTM D2042 |
| Specific gravity @ 25°C | 1.04 – 1.06 | ASTM D70 |
| Moisture, max | 1 % | ASTM D95 |
| Particle size | 75 – 200 µm | Sieve |
| Typical dosage | 2 – 8 lb/bbl | |
| Packing | 25 kg (50 lb) bags palletized; 1 MT jumbo bags. | |
Typical values. The final specification is confirmed in the COA of each shipment.
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