US 12,146,095 B2
pH-responsive nano-gel plugging material, and preparation method therefor and use thereof
Jie Zhang, Beijing (CN); Rongchao Cheng, Beijing (CN); Jie Feng, Beijing (CN); Zhiliang Zhao, Beijing (CN); Shuangwei Wang, Beijing (CN); Long Li, Beijing (CN); and Tianyi Zhang, Beijing (CN)
Assigned to CHINA NATIONAL PETROLEUM CORPORATION, Beijing (CN); and CNPC ENGINEERING TECHNOLOGY R & D COMPANY LIMITED, Beting (CN)
Filed by CHINA NATIONAL PETROLEUM CORPORATION, Beijing (CN); and CNPC ENGINEERING TECHNOLOGY R&D COMPANY LIMITED, Beijing (CN)
Filed on Jul. 18, 2023, as Appl. No. 18/354,616.
Application 18/354,616 is a continuation of application No. PCT/CN2022/074520, filed on Jan. 28, 2022.
Claims priority of application No. 202110777697.3 (CN), filed on Jul. 7, 2021.
Prior Publication US 2023/0365853 A1, Nov. 16, 2023
Int. Cl. C09K 8/508 (2006.01); C09K 8/035 (2006.01); C09K 8/42 (2006.01)
CPC C09K 8/5083 (2013.01) [C09K 8/035 (2013.01); C09K 8/426 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A pH-responsive nano-gel plugging material, wherein the raw materials for the pH-responsive nano-gel plugging material comprises, in parts by mass, 50-70 parts of water, 2-3 parts of an emulsifier, 25-35 parts of an acrylic terpolymer, 10-15 parts of a polyol-based compound, and 10-20 parts of a vinyl pyridine-based compound.