US 12,247,167 B2
Salt tolerant friction reducer
Wenwen Li, Pearland, TX (US); and Rajesh Saini, Cypress, TX (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by ARAMCO SERVICES COMPANY, Houston, TX (US)
Filed on Dec. 15, 2021, as Appl. No. 17/644,450.
Claims priority of provisional application 63/135,887, filed on Jan. 11, 2021.
Prior Publication US 2022/0220367 A1, Jul. 14, 2022
Int. Cl. C09K 8/90 (2006.01); C08F 220/06 (2006.01); C08F 220/28 (2006.01); C08F 220/56 (2006.01); C09K 8/68 (2006.01)
CPC C09K 8/905 (2013.01) [C08F 220/06 (2013.01); C08F 220/282 (2020.02); C08F 220/56 (2013.01); C09K 8/68 (2013.01); C09K 2208/28 (2013.01)] 2 Claims
OG exemplary drawing
 
1. 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.