US 12,247,167 B2 · Salt tolerant friction reducer

Abstract

Provided are water-soluble polymers that may include a water-soluble bipolymer, a water-soluble anionic terpolymer, and a water-soluble cationic terpolymer. The water-soluble polymers may include a reaction product of a first monomer that has a vinyl-containing group linked to a pendant carbohydrate moiety; a second monomer that has a vinyl group, a carbonyl group and a nitrogen; an anionic monomer in a water-soluble anionic terpolymer; and a cationic monomer in a water-soluble cationic terpolymer. Further provided are aqueous solutions that may include a water-soluble bipolymer, a water-soluble anionic terpolymer, and a water-soluble cationic terpolymer. Further provided are methods of use that may include introducing an aqueous solution into a formation such that the formation fractures, where the aqueous solution may include a water-soluble bipolymer, a water-soluble anionic terpolymer, and a water-soluble cationic terpolymer.

Claims2

Dependent claims

An aqueous solution comprising:

a water-soluble anionic terpolymer that is a reaction product of a first monomer that has a vinyl-containing group that is an acryloyl group linked to a pendant carbohydrate moiety, a second monomer that has a vinyl group, a carbonyl group and a nitrogen, and an anionic monomer,
where the first monomer is glucose acrylate, the second monomer is acrylamide, and the anionic monomer is acrylic acid, and
where the aqueous solution has a salinity in a range of from about 4,000 mg/L to about 57,000 mg/L total dissolved solids.

Dependencies are inferred from the claim text.

Salt tolerant friction reducer

Life of this patent

Salt tolerant friction reducer

Life of this patent

Abstract

Claims2