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Expansive cement

  • US 10,208,562 B2
  • Filed: 01/16/2018
  • Issued: 02/19/2019
  • Est. Priority Date: 09/30/2014
  • Status: Active Grant
First Claim
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1. A method of using an expansion additive composition, the method comprising:

  • mixing the expansion additive composition, a Portland cement and water so as to form a slurry, wherein the expansion additive composition comprises;

    a calcium aluminate cement in an amount from about 0.5% to about 8.0% by weight of said Portland cement;

    a lithium compound in an amount from about 0.001% to about 0.50% by weight of said Portland cement;

    calcium sulfate present in an amount from about 1% to about 15% by weight of said Portland cement;

    calcium hydroxide present in an amount from about 0.1% to about 3.0% by weight of said Portland cement; and

    sodium bicarbonate present in an amount from about 0.01% to about 1.00% by weight of said Portland cement; and

    introducing the slurry into a subterranean formation.

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