Description
High-temperature-resistant (120 °C) grade of carboxymethyl starch (CMS), produced by alkalization and etherification of starch. Excellent saturated-salt-water and calcium resistance.
Characteristics declared for the product and stated conditions. Selection and performance subject to technical evaluation of the fluid system.
Appearance
White / pale-yellow free-flowing powder / granules.
Main Advantages
- Thermal-resistant grade withstands 120 °C for salt-water drilling-fluid.
Fluid Systems Mentioned
Fresh Water
Saturated Salt Water
Specifications
| Parameter | Value / Limit | Unit | Test Conditions |
|---|---|---|---|
| Appearance | White/pale-yellow free-flowing powder/granules | — | — |
| Moisture | ≤10.0 | % | — |
| Sieve residue (0.42 mm) | ≤10.0 | % | — |
| pH value | 7.0–9.0 | — | — |
| Viscosity-reduction rate of 1.5% solution | ≥75.0 | % | — |
| API fluid loss | ≤10.0 | mL | Fresh-water mud @ ambient |
| API fluid loss | ≤12.0 | mL | Fresh-water mud after hot-roll @120 °C–16 h |
| API fluid loss | ≤12.0 | mL | Saturated-salt-water mud @ ambient |
| API fluid loss | ≤15.0 | mL | Saturated-salt-water mud after hot-roll @120 °C–16 h |
Technical note: The four API fluid-loss results are distinguished by water type (fresh / saturated-salt) and by condition (ambient / after hot-rolling at 120 °C for 16 h); they must not be combined or averaged.
Application
Directly applicable in diverse water-based mud systems; compatible with multiple mud additives. Recommended dosage: 1%–3%. Recommended mud pH 9–12. For fresh-water / low-salt mud below 60 °C, add biocide to prevent mud fermentation.
Dosage Guidance
1%–3%. Recommended mud pH: 9–12.
Indicative range from technical documentation. Final dosage requires testing and evaluation of the fluid system.
Packaging & Storage
3-in-1 composite bags with PE liner, net 25 kg/bag. Cool dry ventilated warehouse.
Available Documentation
Catalog technical data sheet: available. Request the applicable SDS and CoA; availability subject to confirmation.
Request technical data sheet, SDS and documentation applicable to the product and batch