Pregelatinized starch
Pre-Gelatinized Starch is a high-performance, cold-water–soluble polymeric additive designed to control filtrate loss and improve the overall rheological behavior of water-based drilling fluids. It is produced by gelatinizing natural starch under controlled temperature and mechanical shear, followed by drying and milling to achieve instant hydration properties. Because of this pre-processing, the starch becomes fully dispersible and rapidly soluble in both cold and hot water, allowing immediate development of viscosity and filtration control without needing high temperature activation. The product forms a thin, tough, and low-permeability filter cake on the borehole wall, significantly reducing fluid invasion and stabilizing water-sensitive formations.
Pre-Gelatinized Starch is effective in freshwater, brine, KCl, polymer muds, salted systems, and lightly contaminated muds. It performs efficiently in a wide pH range and maintains stability in the presence of calcium and magnesium hardness. The product also improves mud consistency by enhancing carrying capacity, reducing high-pressure fluid loss, and preventing thick filter cake formation.
Specification
| Parameters | Test Results |
|---|---|
| 1. Moisture | - 8% Max |
| 2. Salt Water Test 4 % | |
| Base Suspension: | |
| API Filtrate Loss | - 90 +/- 10 |
| Apparent Viscosity CP | - 6 Max |
| PH | - 8 +/- 1 |
| Starch Treated Concentration to give 10 ML API Filtrate Loss G/L | - 9 Max |
| Starch Treated Suspension Apparent Viscosity CP | - 9 Max |
| 3. Saturated Salt Water Test | |
| Base Suspension: | |
| API Filtrate Loss | - 100 +/- 10 |
| Apparent Viscosity CP | - 10 Max |
| PH | - 8 +/- 1 |
| Concentrated Starch to give 10 ML API Filtrate Loss G/L | - 12 Max |
| Starch Treated Suspension Apparent Viscosity CP | - 12 Max |
| 4. pH | - 6.0 to 7.0 |
| 5. Stability | - No preservative needed |
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