Fluid loss and gas migration control additive
Control fluid loss and gas migration at temperatures ranging from 150 to 400 degF [66 to 204 degC].
The UNIFLAC universal fluid-loss additive for cement product family contains universal and cost-effective solutions for fluid-loss and gas migration control for all cementing applications. Solid solutions for dry-blending in the cement include D167 and D167A. Liquid solutions for adding to the mix water include D168 and D168A. The additives are custom-made third-generation solid polymers that can be predissolved in the mix water or dry blended with the cement. The robust properties make slurry design very simple and produce predictable results in the field from the surface casing to the liners.
Test results show the very low sensitivity of UNIFLAC additives to small temperature or concentration variations. They are least sensitive to cement brands at bottomhole circulating temperatures (BHCTs) from 32 to 400 degF [0 to 204 degC]. Synergy between Schlumberger retarders and UNIFLAC additives, such as UNISET additive, provides additional operational benefits. Early compressive strength (CS) development reduces waiting-on-cement time. The concentration of retarder required to achieve a desired thickening time is reduced.