Fluid-loss control
Thin, low-permeability filter cake under API and HTHP testing.
08 · Industrial
Oilfield drilling fluids
Evaluated up to 165°C in brine and formate systems
165°Chighest verified system
Modified starch is a cost-effective fluid-loss control agent for water-based drilling fluids. Gaofeng evaluates its drilling starches under API and HTHP conditions across calcium chloride, sodium chloride, saturated brine and formate systems, including clay-free and calcium-carbonate-free formulations. Grades for up to 180°C are in development.
Request sample & data sheetTypical products
- Water-based drilling fluids
- Clay-free brine systems
- Formate (potassium / sodium) systems
- Completion and workover fluids
Recommended starch families
What the starch has to do
Salt and calcium tolerance
Works in CaCl₂, NaCl and saturated brine.
Temperature stability
Systems evaluated from 100°C to 165°C.
Clay-free compatibility
Suitable for clay-free and CaCO₃-free formulations.
Verified performance
Fluid-loss control verified in API/HTHP tests from 100°C to 165°C, in CaCl₂, NaCl, saturated-brine and formate systems.
Development target
A 180°C high-temperature grade and a dedicated brine-system starch are in development. They are not offered as standard supply yet.
Drilling grades
| GFSY-A10 | 25°C · GB/T 5005-2010 |
| GFSY-B14 | 140°C · API 13A |
| GFSY-B149 | 149°C · Saudi Aramco |
| GFSY-B16 | 160°C · CNOOC |
| GFSY-B165 | 165°C · PetroChina |
Temperature = test temperature for API fluid loss. CNOOC: China National Offshore Oil Corporation. Standards as stated in Gaofeng's product documentation; test reports available on request.
Where it is used
- Land and offshore drilling, including deep and ultra-deep wells
- Complex formations with high temperature, high salinity and high pressure
- Horizontal and directional wells: stable cuttings transport and hole cleaning
Evaluated mud systems
Research and evaluation conditions. Final recommendations depend on the complete drilling-fluid formulation and test protocol.
- 120°C · 28% CaCl₂ · API
- 140°C · 4% / saturated brine · API
- 100°C · 20% brine · clay-free
- 165°C · potassium formate · clay- and CaCO₃-free · API
- 138°C · brine · clay- and CaCO₃-free · API
- 121°C HTHP · 10% brine · clay-free
- 160°C · NaCl + potassium formate · clay- and CaCO₃-free · API
- 149°C HTHP · potassium/sodium formate · clay-free
Send us your formulation and process conditions.
Tell us the product, process temperature, pH, shear and the result you need. Our application team will suggest grades and an evaluation route.