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Cement set activators for set-delayed cement compositions and associated methods

  • US 9,227,872 B2
  • Filed: 03/31/2013
  • Issued: 01/05/2016
  • Est. Priority Date: 03/09/2012
  • Status: Active Grant
First Claim
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1. A method of cementing in a subterranean formation, comprising:

  • providing a set-delayed cement composition comprising water, pumice, hydrated lime, a phosphonic acid derivative set retarder, and a polycarboxylated ether dispersant;

    activating the set-delayed cement composition with a cement set activator, wherein the cement set activator comprises at least one activator selected from the group consisting of nanosilica, a polyphosphate, and combinations thereof;

    introducing the set-delayed cement composition into a subterranean formation; and

    allowing the set-delayed cement composition to set in the subterranean formation.

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