PAC (Polyanionic Cellulose)
Polyanionic cellulose drilling-fluid additive. Three viscosity grades for filtrate control and rheology in water-based mud systems.
Overview
Polyanionic cellulose (PAC) is a water-soluble cellulose derivative engineered specifically for oilfield drilling-fluid applications. Created by reacting cellulose with monochloroacetic acid under controlled conditions, PAC is anionic and salt-tolerant — performing in fresh water, seawater, and saturated brine systems alike. FiveRivers Materials supplies all three viscosity grades from qualified producers in China and India.
PAC’s primary function is filtrate control — building a thin, low-permeability filter cake on the wellbore wall that prevents drilling fluid from invading the formation. The three grades (LV, R, HV) trade off filtrate-control efficiency against viscosity contribution, letting drilling fluid engineers select the right grade for each mud system. PAC remains effective in calcium-contaminated muds, high-salinity systems, and at elevated downhole temperatures — making it one of the most widely-used filtrate-control additives in modern drilling operations.
Technical Specifications
Variants & Forms
PAC-LV (Low Viscosity)
Filtrate control without significant viscosity build. Preferred for high-density mud systems where additional viscosity is not desired.
PAC-R (Regular)
Balanced filtrate control and moderate viscosity. The most versatile and commonly used PAC grade.
PAC-HV (High Viscosity)
High viscosity development for hole cleaning in low-solids muds. Preferred for horizontal and extended-reach wells.
Packaging Options
Applications by Industry
Oil & Gas
- ◢ Drilling-fluid filtrate control — primary fluid-loss additive
- ◢ Viscosity development in water-based muds
- ◢ Wellbore stability — shale inhibition
- ◢ Workover and completion fluid viscosifier
- ◢ High-salinity mud systems — salt-tolerant filtration
- ◢ Horizontal and extended-reach drilling — hole cleaning
Storage & Handling
Stocking & Logistics
Inventory held at the operational hubs listed below. Direct FCL from origin (Mumbai / Ahmedabad / China) available for buyers requiring custom specs, branded packaging, or origin documentation.