PAC HV
PAC HV is a high viscosity polyanionic cellulose polymer used for fluid loss control and encapsulation. The increased number of branch chains on the polymer chain increases the viscosity of the polymer substantially.
Application
PAC HV forms a thin, strong filter cake in order to stabilize the formation and reduce fluid loss the formation. PAC HV will act as a encapsulator in reactive formations reducing problem associated with clay and shale formations. PAC HV increases the viscosity of the fluid system.
Advantages
- Effective in low concentrations for controlling fluid loss and building viscosity
- Encapsulates shale particles to inhibit swelling and dispersion
- Applicable in all water-base fluids, ranging from low-solids, non-dispersed polymer systems to high-density, dispersed systems
Typical Usages
| Typical Amounts of PAC HV Added to freshwater | ||
|---|---|---|
| Drilling Application | lb/100 gal | lb/bbl |
| Normal fluid loss | 1.2 - 2.5 | 0.5 - 1 |
Typical Properties
| Physical Appearance | White, granular powder |
|---|---|
| Specific Gravity | 1.6 |
| pH (1% solution) | 6.5-8.5 |
| Bulk Density | 40-55 lbs/ft³ |
Packaging
PAC HV is packaged in 50 lbs (22.7 kg) bags