US 11,999,905 B2
Degradable friction reducer for hydraulic fracturing treatments
Fuchen Liu, Beijing (CN); Jianshen Li, Beijing (CN); Lijun Lin, Katy, TX (US); Jiangshui Huang, Sugar Land, TX (US); Genyao Lin, Houston, TX (US); Lulu Song, Houston, TX (US); and Stephanie Yu, Houston, TX (US)
Assigned to CNPC USA CORPORATION, Houston, TX (US); BEIJING HUAMEI INC., Beijing (CN); and CHINA NATIONAL PETROLEUM CORPORATION, Beijing (CN)
Filed by CNPC USA CORPORATION, Houston, TX (US); BEIJING HUAMEI INC., Beijing (CN); and China National Petroleum Corporation, Beijing (CN)
Filed on Aug. 10, 2022, as Appl. No. 17/885,251.
Claims priority of provisional application 63/260,187, filed on Aug. 11, 2021.
Prior Publication US 2023/0058884 A1, Feb. 23, 2023
Int. Cl. C09K 8/68 (2006.01); E21B 43/26 (2006.01)
CPC C09K 8/68 (2013.01) [E21B 43/26 (2013.01); C09K 2208/28 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A composition for reducing friction in a fracturing fluid comprising:
a polyacrylamide friction reducer comprising:
a polyacrylamide polymer; and
one or more surfmers bonded to the polyacrylamide polymer.