Drilling Fluid
Designing Lightweight Cement Slurries with Gilsonite
In weak or depleted formations, heavy cement slurries can fracture the rock and cause losses. Lightweight slurries solve…
Lightweight extender and lost-circulation additive for oil well cement slurries.
Key benefits
- Lowers slurry density
- Controls lost circulation while cementing
- Improves bonding and elasticity
- Helps prevent gas migration
Product overview
Cementing grade gilsonite lowers slurry density thanks to its low specific gravity, bridges fractures during placement, improves bonding and makes set cement more elastic. It helps prevent gas migration in critical wells.
Applications
- Lightweight cement slurries
- Weak and depleted formations
- Gas wells
- Deep high-temperature wells
Technical data
Data sheet
Cementing Grade Gilsonite
| Property | Typical value | Test method |
|---|---|---|
| Appearance | Black solid, shiny | Visual |
| Softening point (R&B) | 160 – 220 °C | 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 | 5 – 15 % BWOC | |
| Packing | 25 kg bags palletized; 1 MT jumbo bags. | |
Typical values. The final specification is confirmed in the COA of each shipment.
