Poly Anionic Cellulose (PAC) is a water-soluble polymer derived from cellulose and is widely used in the oil and gas industry, particularly in drilling fluids.
- Viscosity Control: PAC acts as a viscosifier, helping to increase the thickness of drilling mud, which is essential for carrying drill cuttings to the surface.
- Fluid Loss Reduction: It’s highly effective in reducing fluid loss by forming a thin, impermeable filter cake on the borehole wall, preventing the drilling fluid from seeping into the surrounding formation.
- Shale Stabilization: PAC helps stabilize shale formations by inhibiting their swelling or disintegration when exposed to water-based drilling fluids.
- Temperature and Salt Tolerance: It performs well under high-temperature conditions and in saline environments, making it versatile for various drilling scenarios.
Poly Anionic Cellulose comes in different grades, such as high-viscosity (PAC-HV) and low-viscosity (PAC-LV), depending on the specific needs of the drilling operation. It’s a critical additive for improving the efficiency and safety of oil drilling processes.