HR®-25 Cement Retarder

HR®-25 is a high-temperature retarder/ intensifier. As a stand-alone retarder, HR-25 retarder/intensifier can be used to gel cement. However, this product was primarily designed for intensifying common retarders, such as SCR-100™ retarder.

HR-25 retarder/intensifier can be used at bottomhole circulating temperatures (BHCTs) between 200°F and 400°F (93°C and 204°C). Normal retarder/intensifier concentrations are 0.5% to 2.0%.

HR-25 retarder/intensifier can provide the following benefits:

  • This product is highly soluble in water. Consequently, it exhibits more uniform thickening times in the laboratory and has less effect on cement compressive-strength development, especially at the top of a long cement column.
  • Can be added directly to the mixing water, or it can be dry-blended.
  • Interacts well with other cement additives.
  • Helps extend pumping times.
  • Allows improved displacement rates at steady pressures.
  • Allows operators to better predict thickening times.
  • The Environmental Protection Agency (EPA) does not classify HR-25 retarder/ intensifier a as hazardous waste.
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