General description
TRXR-250L is a phosphate-based retarder with no special water-quality requirements. Within its application temperature range, it extends cement slurry thickening time. It is suitable for all classes of oil-well cement that comply with the Chinese national standard, as well as typical weighting and lightweight materials. TRXR-250L has some dispersing effect on cement slurries and little effect on fluid loss.
Physical and chemical properties
| Property | Specification |
|---|---|
| Appearance | Yellow liquid |
| Density (20 ± 2°C), g/cm³ | 1.06 ± 0.02 |
Technical specifications
| Property | Specification |
|---|---|
| Initial consistency, Bc | 25 max. |
| Transition time from 40 Bc to 100 Bc, min | 30 max. |
| Thickening curve | Normal |
| Thickening time (80°C, 46.5 MPa), min | 120 minimum |
| Free fluid, % | 1.4 max. |
| Compressive strength (80°C, ATM, 24 h), MPa | 14.0 minimum |
Recommended cement slurry composition: Class G cement (HSR) 800 g; distilled water 328.0 g; TRXR-250L 1.6 g; fluid-loss additive 24.0 g; defoamer 0.4 g. | |
Application
Application temperature range: 55–110°C (BHCT).
Dosage: 0.1–3.0% (BWOC).
Packaging
Packed in 80 kg plastic drums or as requested by the customer.
