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Pumice-containing remedial compositions and systems for use

  • US 8,910,708 B2
  • Filed: 12/30/2013
  • Issued: 12/16/2014
  • Est. Priority Date: 04/30/2013
  • Status: Active Grant
First Claim
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1. A remedial cementing system for cementing in a subterranean formation comprising:

  • a lightweight settable composition comprising pumice, a calcium activator, and water, wherein the water is present in an amount in a range of from about 40% to about 200% by weight of the pumice, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon;

    wherein the lightweight settable composition is essentially free of any additional cementitious components; and

    wherein the lightweight settable composition is foamed with a foaming additive and a gas;

    mixing equipment for mixing the lightweight settable composition; and

    pumping equipment for delivering the lightweight settable composition into a void or crack in the subterranean formation, a gravel pack, a conduit, a cement sheath, or a microannulus.

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