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.
Claims31
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.
A fracturing composition according to claim to 16, 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.
A fracturing fluid according to claim 27, wherein said proppant is gravel, quartz sand grains, sintered bauxite, glass and ceramic beads, walnut shell fragments, or aluminum pellets
Dependencies are inferred from the claim text.