High viscosity polyanionic cellulose (PAC HV) is a type of carboxymethylcellulose sodium salt with a high degree of substitution.
In the process of drilling production and production oil, gas and water wells, polyanionic cellulose (PAC) used as additives for drilling fluids performs two functions — creates a filtering layer at the borehole walls to minimize water losses and controls the rheology of fluid systems.
Both water and organic solvents can serve as the basis for drilling fluids; however, today’s environmental protection requirements and technological features of well drilling processes determine the use of water-based drilling fluids in most cases. Since PAC is a water-soluble polymer, it is used in drilling fluids as an additive that improves performance. Unlike CMC, PAC is more effective in saline solutions.
– Thanks to its film-forming properties, it slows down the erosion of the walls of the well, preventing it from falling asleep.
– Improves the cooling and lubricating properties of drilling fluids.
– Contributes to the maintenance of thermal and biological stability of drilling fluids.