Back to results
US 6,579,947 B2Granted
Hydraulic fracturing fluid comprising a block copolymer containing at least one water-soluble block and one hydrophobic block
AssigneeRhodia Chimie
InventorsCaroline Heitz, Mathieu Joanicot, Robert J. Tillotson
Life of this patent
Estimating the term…
Abstract
The invention relates to a hydraulic fracturing fluid comprising an aqueous liquid, and a block copolymer containing at least one water-soluble block and one hydrophobic block and being particularly suited for use in high temperature ranges, greater than 180° C.
Claims28
A hydraulic fracturing fluid composition comprising:
- a) an aqueous liquid, and
- b) at least one block water-soluble in nature and containing hydrophobic units and at least one block predominantly hydrophobic in nature forming a viscoelastic gel in said aqueous liquid, and, wherein, said predominantly hydrophobic block has hydrophilic units in an amount equal to between 0 and less than 33% by weight, with respect to the total weight of the units of the hydrophobic block.
A fracturing composition according to claim to 15, wherein the monomers that can be rendered hydrophilic by hydrolysis are:
- methyl acrylate, ethyl acrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, tert-butyl acrylate;
- vinyl acetate;
- quaternized 2-dimethylaminoethyl methacrylate, quaternized 2-dimethylaminoethyl acrylate;
- acrylamide or (meth)acrylamide.
1 more element
Dependencies are inferred from the claim text.