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Filtration Control Agent

PAC™-R filtration control agent is used in most water-based drilling fluids, can provide secondary viscosity and is effective even at low concentrations. It is suitable for use in fresh water, salt water and brine-based fluids. PAC-R filtration control agent is stable to 300°F (149°C), non-toxic and does not require a biocide. PAC filtration control agent products are premium quality fluid loss control products providing superior performance to most other products in their class. PAC-R filtration control agent exceeds the European specifications for regular viscosity polyanionic cellulose.

Data Sheets (DS)

Applications and Functions

  • Helps control filtration rates
  • Helps retard shale swelling and disintegration
  • Helps provide supplementary viscosity in fresh water, sea water, and brine-based fluids


  • Effective in fresh water, salt water, and brine-based fluids. 
  • Effective in small concentrations for viscosity and filtration control
  • Stable at temperatures up to 300°F (149°C)
  • Effective in moderate to high pH systems
  • Nontoxic
  • Does not require a bactericide