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Calcium phosphate cement compositions comprising pumice and/or perlite and associated methods

  • US 9,499,731 B2
  • Filed: 12/29/2014
  • Issued: 11/22/2016
  • Est. Priority Date: 11/21/2011
  • Status: Active Grant
First Claim
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1. A well cement composition comprising:

  • calcium aluminate;

    sodium polyphosphate in an amount of about 2% to about 20% by weight of the cement composition;

    an additive comprising pumice, wherein the additive has a mean particle size of less than about 15 microns; and

    water in an amount sufficient to form a pumpable slurry;

    wherein the additive is present in an amount that will increase a compressive strength of the well cement composition by at least 20% compared to the well cement composition comprising a comparable amount of fly ash instead of the additive.

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