Polyanionic cellulose

Carboxymethylcellulose Application of polyanionic cellulose Widely used in the oil industry in drilling fluids, especially when working with seawater in oil production wells. This is a combined filtration controller and thickener in fresh and salt water for drilling systems. PAC stabilizes the structure of soft soil and prevents wellbore wall collapse. It can be used to increase and stabilize viscosity to improve wellbore cleaning. Also used to minimize pressure losses in the backflow of the system during well drilling. PAC is effective at low concentrations and is insensitive to bacterial action. Polyanionic cellulose is effective over a wide pH range, has an affinity for clay surfaces and limits their hydration and dispersion. The polyanionic cellulose polymer is designed to provide reduced viscosity and filtration rate of drilling muds. Polyanionic cellulose encapsulates shale particles to reduce dispersion. PAC plays an important role in reducing filtration losses in fresh and seawater.