Product Detail Description
Polyanionic Cellulose Polymer PAC-LV is a high-purity, low-viscosity cellulose derivative engineered for superior filtration control in water-based drilling fluids. This premium-grade additive is chemically designed to provide exceptional fluid loss reduction with minimal impact on the overall rheological profile of the system. Through advanced carboxymethylation and purification processes, this high-quality Polyanionic Cellulose Polymer PAC-LV achieves consistent performance across a wide spectrum of aqueous environments, including fresh water, seawater, and saturated brine formulations, while maintaining stability at elevated temperatures up to 300°F (149°C).
The primary mechanism of this advanced additive involves the adsorption of its anionic polymeric chains onto clay surfaces through electrostatic interactions and hydrogen bonding, simultaneously dissolving in the aqueous phase to increase filtrate viscosity. This dual-action mechanism significantly reduces spurt loss and total filtrate volume by promoting the formation of a thin, impermeable, and tough filter cake. The efficient filter cake formation minimizes the risk of differential pipe sticking and formation damage, representing a key operational advantage of Polyanionic Cellulose Polymer PAC-LV in maintaining wellbore stability and protecting reservoir productivity.
Furthermore, this specific additive provides secondary shale inhibition through a combination of encapsulation and efficient coating of reactive solids. The polymer molecules form a protective membrane around shale particles, controlling dispersion and mitigating the hydration of swelling clays. This supplementary inhibition capability enhances wellbore stability in water-sensitive formations, making it particularly valuable when drilling through reactive shale sections.
Typical applications include reservoir drill-in fluids, completion fluids, and other water-based systems where excellent filtration control and minimal formation damage are critical requirements. The recommended treatment concentration ranges from 0.5 to 3.0 pounds per barrel (ppb), depending on specific system requirements and downhole conditions. Its compatibility with other common drilling fluid additives allows flexible formulation design while maintaining consistent filtration control performance.
Advantages
Temperature stable up to 300°F (149°C)
No fermenting, no biocide needed
Effective in fresh water, seawater and brine fluids
Functions in all pH range (6-12)
Produces thin, slick, tough filter cake
Inhibits hydratable, swelling shales
Rapid hydration and easy dispersion
Compatible with other drilling fluid additives
Appearance
White free-flowing powder
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