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Hydrolyzed Polyacrylonitrile sodium salt Na-HPAN
Na-HPAN is copolymer of several polymers such as acrylamide and sodium acrylate acrylonitrile. soluble in water, and its solution is alkalescent, widely used for water-based drilling fluid loss with some role of viscosifier; In freshwater drilling fluid system, anti-scar can reach 250℃ and is stable.
Specification and performance:
Appearance, Free-flowing powder or granules
Loss on drying, ≤10.0%
Screen margin, ≤5.0%
Residue on ignition, ≤3.0%
Ammonium, ≥5.5%
Item | Technical index | ||
Freshwater system | Salt water system | ||
Base mud | Apparent viscosity, mPa.s | ≤8.0 | ≤10.0 |
Filtration, mL | 18.0-25.0 | 55.0-65.0 | |
Base mud+NH4-HPAN | Apparent viscosity, mPa.s | ≤8.0 | ≤10.0 |
Reduced filtration rate,% | ≥45.0 | ≥50.0 | |
Packing: 25 kgs PE bag.