Halliburton’s Halad®-862 fluid-loss additive was developed as a less dispersive alternative to Halad®-413 fluid-loss additive. It has a broad range of applications and has been developed to meet response requirements in heavyweight slurries, seawater, and saturated salt designs. Halad-862 fluid-loss additive is designed for use in heavyweight (high-density), high-temperature slurries or any slurry that contains salt (2% up to saturated) with no loss of performance, it is the ideal fluid-loss additive for high-temperature, high-density slurries.
Halad-862 fluid-loss additive provides excellent fluid-loss control at high temperatures and is compatible with lower-temperature fluid-loss additives, such as Halad®-344™ fluid-loss additive.
Halad-862 fluid-loss additive is a dry powder that is easily and most commonly dry blended.
It is less dispersive to the slurry and, in some cases, the use of a viscosifying agent (FWCA™ cement additive, Econolite™ additive, Halad-344 or Halad®-766™ fluid-loss additives) might not be required.
Because of the reduced dispersion provided by Halad-862 fluid-loss additive, often high-temperature retarders can be used without over dispersing the slurry.
In many cases, Halad-862 fluid-loss additive provides better fluid-loss control than Halad®-413™ fluid-loss additive.
Current slurry designs might need further evaluation of viscosity when Halad-862 fluid-loss additive is used as a one-for-one replacement of Halad-413 fluid-loss additive. In some cases, a dispersant material might need to be added with Halad-862 fluid-loss additive slurry designs. There can be some slight retardation at temperatures below 200°F (93.3°C).
The CST™ cement support tool, tubing release tool (TRT), bottomhole kickoff assembly (BHKA) disconnect tool, and bottomhole kickoff assembly (BHKA) tool system were designed to aid in setting balanced and competent cement plugs during remedial and primary cementing operations.