PAC Polyanionic Cellulose - Drilling Fluids

PAC Polyanionic Cellulose

PAC Polyanionic Cellulose polymer of high purity and used as a main fluid-loss reducer for water-based drilling fluids.

Polyanionic cellulose (PAC) is a widely used drilling fluid additive. It has a similar molecular structure to carboxymethyl cellulose (CMC). However, it is considered better than CMC in terms of filtration reduction, anti-salt, anti-collapse, and high-temperature resistance. It can be used at temperatures up to 150°C.

PAC is considered a premium product because it typically has a higher degree of carboxymethyl substitution and can contain less residual Sodium Chloride.

There are to main versions of PAC available – PAC HV (Polyanionic cellulose High Viscosity) and PAC LV (Polyanionic cellulose Low Viscosity)

PAC polyanionic cellulose is added to drilling fluids and other mixtures of chemicals to aid in several actions, including the cool down and lubrication of the mud bit, suspension of formation cuttings, and aid transportation of the surface, and management formation pressure throughout the oil well.

Adding PAC can prevent any dangerous situations such as well blockages or bore collapses during the production process by making the drilling fluid stiffer. Its low water loss properties can reduce the amount of water needed to go into the productive zone.

PAC is used to adjust the mud’s viscosity levels, and it can be used as part of a mixture to change the PH levels.

PAC Polyanionic cellulose usage can be adjusted to meet local conditions. It is recommended to bring in a qualified individual to advise on any adjustment that may be required.

Preparation & Procedures

PAC should be stored in a dry location. To avoid lumping, it is added to the mud system through the hopper with less than two sacks been added in an hour.

Those working with PAC should wear appropriate Personal Protective Equipment, including dust masks and eye protection, while mixing powdered products. Always try to avoid skin contact and do not inhale dust or allow contact with eyes.