High temperature fluid loss additive for drilling, completion or workover fluids
Polytex AHT is a proprietary synthetic polymer designed to impart fluid loss control and relatively high temperature stability without significantly increased fluid viscosity. Polytex AHT is packaged in 50 lb or 25 kg sacks.
Polytex AHT may be used in fresh water, potassium chloride, sodium chloride, sodium formate, and sodium bromide brines.
- Polytex AHT can be used to control downhole fluid loss of a Bridgecarb Ultra®, Bridgesal Ultra®, Thixsal-Ultra®, or Ultra Carb Systems
- Polytex AHT is compatible with viscosifiers such as xanthan gum biopolymer, hydroxyethyl cellulose and bentonite clay
- Polytex AHT, when used in sufficient concentrations and in combination with Thermasal®-A and Thermasal-B, will control high pressure fluid loss at temperatures up to 325°F with minimum viscosity increases
Polytex AHT is readily dispersed into fluids through a conventional mud hopper. A normal concentration is 3 to 7 lb/bbl, depending upon the fluid loss control needed.
Laboratory tests show Polytex AHT is essentially non-damaging. Films or "filter cakes" of Polytex AHT do not hinder clean-up procedures following completion and workovers.