Physical and Chemical Properties
| Item | Index |
| Appearance | Black or brown black powder |
| Bulk density, g/cm3 | 0.80±0.20 |
| Solubility, % | 100 |
| Moisture content, % | ≤5.0 |
| Rheological property, 90℃ | Φ3≤15/Φ6≤20 |
| Fluid loss amount (90℃ , 6.9MPa,30min),
mL |
≤60 |
| Cement slurry composition: 100% Grade “G” cement, +44% fresh water +1% fluid loss agent OOC-G90S+0.25% defoaming agent OOC-X60L | |