US 12,319,871 B2
Application of naphthenic imidazoline in inhibiting formation of natural gas hydrates and composition containing same
Lihong Yang, Beijing (CN); Jiayuan He, Beijing (CN); Haibo Wang, Beijing (CN); Shengyou Zhou, Beijing (CN); Xin Huang, Beijing (CN); Kefeng Yang, Beijing (CN); Shibo Hao, Beijing (CN); Le Zhang, Beijing (CN); Xueqi Cen, Beijing (CN); and Guoxing Chai, Beijing (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC EXPLORATION & PRODUCTION RESEARCH INSTITUTE, Beijing (CN)
Appl. No. 18/554,210
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC EXPLORATION & PRODUCTION RESEARCH INSTITUTE, Beijing (CN)
PCT Filed Sep. 29, 2021, PCT No. PCT/CN2021/121829
§ 371(c)(1), (2) Date Oct. 6, 2023,
PCT Pub. No. WO2023/279554, PCT Pub. Date Jan. 12, 2023.
Claims priority of application No. 202110774301.X (CN), filed on Jul. 8, 2021.
Prior Publication US 2024/0376369 A1, Nov. 14, 2024
Int. Cl. E21B 37/06 (2006.01); C09K 8/524 (2006.01); E21B 41/00 (2006.01)
CPC C09K 8/524 (2013.01) [E21B 37/06 (2013.01); E21B 41/0099 (2020.05); C09K 2208/22 (2013.01)] 11 Claims
 
1. A method for inhibiting formation of natural gas hydrate, comprising adding a composition comprising naphthenic imidazoline into a gas mixture containing methane and water, wherein the naphthenic imidazoline is of formula (I):

OG Complex Work Unit Chemistry