General description
TRCF-252S is a multicomponent copolymer produced by copolymerizing several types of ethylene monomers. Cement slurries containing TRCF-252S have good rheology, salt resistance and a mild dispersing effect. TRCF-252S works over a wide temperature range and is particularly suitable for cementing salt-bearing intervals (salt concentrations up to 36%) and high-temperature wells. It is compatible with retarders, dispersants and CaCl2.
Physical and chemical properties
| Property | Specification |
|---|---|
| Appearance | White or gray-white powder |
| Density (20 ± 2°C), g/cm³ | 2.10 ± 0.15 |
| Fineness (residue on a 0.90 mm sieve), % | 5.0 max. |
Technical specifications
| Property | Specification |
|---|---|
| Fluid loss (80°C), mL | 100 max. |
| Fluid loss (140°C), mL | 100 max. |
| Initial consistency, Bc | 25 max. |
| Thickening time (80°C, 46.5 MPa), min | 60 minimum |
| Thickening curve | Normal |
| Free fluid, % | 0.5 max. |
| Compressive strength (80°C, ATM, 24 h), MPa | 14.0 minimum |
Recommended cement slurry composition (80°C): Class G cement (HSR) 800 g; distilled water 352 g; TRCF-252S 16.0 g (dry blended); retarder 0.8 g; defoamer 0.4 g. Recommended cement slurry composition (140°C): Class G cement (HSR) 600 g; silica flour 210 g; TRCF-252S 16.0 g (dry blended); high-temperature retarder 9.0 g; distilled water 330 g; defoamer 0.4 g. | |
Application
Application temperature range: 20–190°C (BHCT).
Dosage: 1.5–2.0% (BWOC).
Packaging
Packed in 25 kg moisture-proof bags or as requested by the customer.
