Back to results
US 12,559,662 B2Granted
Geopolymer compositions and methods
AssigneeSchlumberger Technology Corporation
InventorsMark Meade, Andrey Vladimirovich Yakovlev, Anatoly Vladimirovich Medvedev, Nathan Fischer, Christopher Parton, Veronica Richter McDonald, Yeukayi Nenjerama, Randy Tercero
Life of this patent
Estimating the term…
Abstract
Geopolymeric compositions are presented that are useful as geopolymer slurries for cementing subterranean wells. The slurries may contain an aluminosilicate source, an alkaline source, and a carrier fluid. The slurries generate an alkali metal or alkaline earth hydroxide activator in situ, thereby avoiding or reducing handling of alkali materials at a wellsite.
Claims19
A method, comprising:
- preparing a pumpable geopolymer slurry comprising an aluminosilicate source, an alkaline source, and a carrier fluid, wherein the alkaline source is encapsulated by an encapsulant and comprises at least one of:
- (i) a mixture of an alkaline earth metal hydroxide and an alkali metal salt, wherein the alkali metal salt is selected from a group consisting of:
- M2CO3, M2SO4, M3PO4, M2C2O4, M2SiO3, MF, M2SiF6, MIO3, M2MoO4, and any combination thereof, and wherein Mis Li, Na, K, Rb, or Cs;
- or
- (ii) an alkaline earth metal oxide, a calcium silicate, or a combination thereof;
- placing the pumpable geopolymer slurry in a subterranean well;
- and
- releasing the alkaline source from the encapsulant in the subterranean well, whereby the released alkaline source generates an alkali metal hydroxide, an alkaline earth metal hydroxide, or both via an in situ reaction.
5 more elements
A method, comprising:
- preparing a pumpable geopolymer slurry comprising an aluminosilicate source, an alkaline precursor system, and a carrier fluid, wherein the alkaline precursor system is encapsulated by an encapsulant and configured to generate an alkali metal hydroxide, an alkaline earth metal hydroxide, or both via an in situ reaction when released from the encapsulant;
- placing the pumpable geopolymer slurry in a subterranean well;
- releasing the alkaline precursor system from the encapsulant in the subterranean well, whereby the released alkaline precursor system generates the alkali metal hydroxide, the alkaline earth metal hydroxide, or both via the in situ reaction;
- and
- setting the pumpable geopolymer slurry to form a geopolymer.
2 more elements
A method, comprising:
- preparing a pumpable geopolymer slurry comprising an aluminosilicate source, an alkaline source, and a carrier fluid, wherein the alkaline source is encapsulated by an encapsulant, and wherein the aluminosilicate source comprises a fly ash, a volcanic ash, a ground blast furnace slag, a calcined or partially calcined clay, an aluminum-containing silica fume, a natural aluminosilicate, a synthetic aluminosilicate glass powder, a zeolite, a scoria, an allophone, a bentonite, a red mud, a calcined red mud, a pumice, or any combination thereof;
- placing the pumpable geopolymer slurry in a subterranean well;
- releasing the alkaline source from the encapsulant in the subterranean well;
- and
- generating an alkali metal hydroxide, an alkaline earth metal hydroxide, or both in the subterranean well via an in situ reaction of the released alkaline source in the subterranean well.
2 more elements
Dependencies are inferred from the claim text.