Introduction
———

PAC (Polyanionic Cellulose) is a high-quality anionic cellulose polymer for water-based drilling fluids (WBM).
It is widely used in freshwater, seawater, and brine-based mud systems to deliver reliable filtration control and to support wellbore stability by improving filter-cake quality.

This product line is available in two rheology profiles:

• PAC-LV — designed for minimal rheology increase while providing strong fluid-loss control.

• PAC-HV — designed to provide supplementary viscosity and improved carrying capacity in addition to filtration control.

Grades & Temperature Rating
——————

• PAC LV — When pumpability / stable hydraulics / low ECD is the priority, with strong filtration control

• PAC HV — When carrying capacity / suspension / hole cleaning is required, while maintaining filtration control

Applications / Functions
—————

• Controls filtration rates in freshwater, seawater and brine-based WBM systems

• Helps form a thin, tough, low-permeability filter cake, reducing the risk of differential sticking

• Helps control dispersion of reactive solids and supports wellbore integrity

• PAC-LV: filtration control with minimal viscosity increase

• PAC-HV: filtration control with supplementary viscosity for cuttings transport and hole cleaning

Advantages
———

• Two rheology options (LV / HV) to match field objectives without changing product family

•  Consistent filtration control and improved filter-cake quality

• Effective across a broad range of water chemistries (freshwater → seawater → brines)

• High degree of substitution supports stable performance in challenging conditions

Recommended Treatment
—————

• Typical treatment range: 0.5–3.0 ppb (optimize based on solids, salinity, temperature and target filtration)

Package
———

• 25 kg sack

• Custom packaging available upon request