General description
This reagent uses water-soluble AMPS-based polymers, low-molecular-weight amides and polyhydroxycarboxylic acid. Aggregation of the molecular chains reduces filter-cake permeability. The polymer provides strong dispersion and resistance to high temperatures and salt.
Performance characteristics
- Suitable for fresh water through to saturated brine.
- Fluid loss: <100 mL API FL.
- Good solubility and compatibility.
- Compatible with any class of cement.
- Good cement slurry stability, with free fluid close to zero.
- Short thickening transition time, with a nearly right-angle thickening profile.
- Suitable for cement slurries of any density.
- Has some retarding effect on cement slurries.
Physical and chemical properties
| Property | Specification |
|---|---|
| Appearance | Greyish-white powder or granules |
| Density (20 ± 2°C), g/cm³ | 1.60 ± 0.10 |
Technical specifications
| Property | Specification |
|---|---|
| Moisture, % | 8.0 max. |
| Fineness (0.315 mm mesh), % | 0.50 max. |
| Initial consistency (80°C, 46.5 MPa, 45 min), Bc | 30 max. |
| Thickening curve | Normal |
| Transition time from 40 Bc to 100 Bc, min | 40 max. |
| Fluid loss (80°C, 6.9 MPa, 30 min), mL | 150 max. |
| Free fluid, % | 1.4 max. |
| Compressive strength (102°C, 21 MPa, 24 h), MPa | 14 minimum |
Recommended cement slurry composition: Class G cement 800 g; water 352 mL; dosage 0.8%. | |
Application
Application temperature range: 30–160°C (BHCT).
Dosage: 0.5–1.2% (BWOC).
Packaging
Packed in 25 kg moisture-proof bags or as requested by the customer.
