Polymer crosslinking system

Details Polymer crosslinking system Polymer crosslinking system

C - Chemistry, Metallurgy

09

K

C09K 8/68 (2006.01)

Patent

CA 2535193

A composition useful for making gelled fluids by crosslinking hydratable polymers is an aqueous solution of zirconium complexed with carbonate and bicarbonate as the only multidentate ligands complexed with zirconium. The composition also provides pH modifying capability and the crosslinking is delayed, so that the single composition replaces several liquid additives previously necessary for generation of fluids used, for example, in hydraulic fracturing.

Formulation utile pour la fabrication de fluides gélifiés par réticulation de polymères hydratables dans une solution aqueuse de zirconium complexé avec du carbonate et du bicarbonate comme seuls ligands multicoordinants complexés avec le zirconium. La formulation procure aussi une capacité de modification du pH, et retarde la réticulation, de telle sorte qu'une seule formulation remplace plusieurs additifs liquides auparavant nécessaires pour la génération des fluides employés, par exemple, dans la fracturation hydraulique.

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