×

Compositions and methods for well cementing

  • US 9,394,202 B2
  • Filed: 04/28/2011
  • Issued: 07/19/2016
  • Est. Priority Date: 05/03/2010
  • Status: Active Grant
First Claim
Patent Images

1. A method for cementing a subterranean well having a borehole, comprising:

  • (i) providing a cementing composition comprising;

    a. a geopolymer composition consisting of an aluminosilicate source, an activator and a carrier fluid; and

    b. a retarder that comprises at least one organic compound comprising at least one nitrogen atom such that the retarder retards a setting time, a thickening time, or both of the geopolymer composition;

    (ii) pumping the composition into the borehole; and

    (iii) allowing the composition to set and harden,wherein the activator is a carbonate salt, a metal silicate, a metal aluminate, sodium hydroxide or potassium hydroxide,wherein the geopolymer composition undergoes dissolution followed by polycondensation to form a poly(sialate) network, a poly(sialate-siloxo) network or a poly(sialate-disiloxo) network.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×