- Sized, fine particle water-soluble completion and workover fluid additive
- Added to high density brines to provide effective bridging and temporary plugging of productive formations or sand control screens after gravel packing
Hysal HT is a blend of polymer and a high purity, specially ground fine particle sodium chloride. The particle size ranges from 0.07 - 44 microns. Hysal HT is packaged in 50 lb or 25 kg sacks.
Hysal HT is added to high density brines composed of calcium bromide and/or zinc bromide mixtures having densities ranging from 12.0 - 18.5 lb/gal to provide bridging and fluid loss control at temperatures up to 280° F.
- Hysal HT makes it possible to temporarily seal a permeable formation with a high density fluid and flow easily through a 6 or 8 gauge wire-wrapped production or tell-tale screen
- Hysal HT can be used to seal inside a completion screen to prevent losses after gravel packing by the addition of larger salt particles, Plug-Sals
A concentration of 100 pounds of Hysal HT and 0.5 gal of Hysal Activator per barrel of base fluid is required with fluid densities in the 12.0 - 18.5 lb/gal range. Formulations from 17.5 - 18.5 lb/gal should be verified by laboratory testing.