US 12,281,260 B2
Wellbore treatment fluids comprising an amphiphilic hyperbranched copolymer
Feng Liang, Cypress, TX (US); Hui-Hai Liu, Katy, TX (US); Jin Ge, Cleveland, OH (US); Jose I. Rueda, Dhahran (SA); and Mohammed A. Bataweel, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA); and Case Western Reserve University, Cleveland, OH (US)
Filed by Saudi Arabian Oil Company, Dhahran (SA); and Case Western Reserve University, Cleveland, OH (US)
Filed on Jun. 23, 2023, as Appl. No. 18/340,357.
Prior Publication US 2024/0425747 A1, Dec. 26, 2024
Int. Cl. C09K 8/60 (2006.01); E21B 43/16 (2006.01); E21B 43/26 (2006.01)
CPC C09K 8/602 (2013.01) [E21B 43/16 (2013.01); E21B 43/26 (2013.01)] 17 Claims
 
1. A wellbore treatment fluid comprising:
an aqueous component; and
an amphiphilic hyperbranched copolymer comprising a polymerized reaction product of at least a first monomer and a second monomer, wherein
the amphiphilic hyperbranched copolymer is a linear-hyperbranched block copolymer, a linear-hyperbranched graft copolymer, or a hyperbranched-hyperbranched graft copolymer,
the first monomer comprises at least one surface reactive end group chosen from the group consisting of carboxylates, phosphonates, sulfonates, and zwitterions,
the second monomer comprises 2-hydroxyethyl methacrylate and acrylamide, and
the amphiphilic hyperbranched copolymer comprises 1 wt. % to 80 wt. % of the first monomer.