• Is a unique and effective calcium resistant filtrate control additive for drilling, completion and workover fluids


FL-7 Plus is a specially processed, stabilized non-ionic starch derivative that controls high pressure-high temperature filtrate loss at temperatures to 275°F with the addition of pH Buffer, and enhances the low shear rate viscosity of a fluid containing xanthan gum biopolymer. This unique polymer combination is synergistic and yields improved static suspension as well as highly pseudoplastic behavior under dynamic conditions. FL-7 Plus is environmentally safe, presenting no toxicity or ecological problems. FL-7 Plus is packaged in 25 kg sacks.

FL-7 Plus is suitable for all water base drilling fluids, workover and completions fluids including, sea water, potassium chloride, magnesium chloride, sodium chloride, calcium chloride, sodium bromide, calcium bromide, and zinc bromide. FL-7 Plus resists calcium contamination over a wide pH range.

FL-7 Plus, when used in combination with properly sized bridging/weighting particles, provides filtration control and helps minimize damage to the productive formation. Fluid compositions mixed with FL-7 Plus may be utilized for the following applications:
  • Drilling into pay zones
  • Lost circulation pills
  • Underreaming
  • Pre/post gravel pack fluid loss pills

FL-7 Plus is easily dispersed into fluids through conventional mud mixing equipment. Concentrations range from 4-7 lb/bbl.

FL-7 Plus is soluble in acids and/or oxidizers and cleans up readily following drilling, workover, or completion operations.