Perlite Cement Additive

Perlite cement additive is a light, granular material made from crushed volcanic rock. Its primary use is to lower the density of cement slurries.  It can be used at bottomhole temperatures (BHTs) between 40°C and 400°F (4°C and 204°C). Typical concentrations are 1 ft³ Perlite additive/1 ft³ cement or 2 ft³ Perlite additive/1 ft³ cement.  Bentonite (Halliburton Gel) can be added to Perlite additive slurries to help prevent separation.

Perlite additive can provide the following benefits:

  • It exhibits excellent bridging properties that help control lost circulation.
  • Its insulating properties make it useful in thermal cementing compositions.
  • Slurries containing Perlite additive cost less per volume because this additive increases the per-sack yield  of cement.
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