(19)

(11)

EP 4 816 491 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24898861.0 (22) Date of filing: 29.11.2024

(51) International Patent Classification (IPC):  C09K 8/54(2006.01) C23F 11/12(2006.01) C23F 11/173(2006.01) (52) Cooperative Patent Classification (CPC): C09K 2208/32; C10G 29/22; C10G 75/02; C09K 8/54; C08G 73/16; C08G 73/1032; C23F 11/173; C23F 11/10 (86) International application number: PCT/US2024/057975 (87) International publication number: WO 2025/117901 (05.06.2025 Gazette 2025/23)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 30.11.2023 US 202318525632 (71) Applicant: Baker Hughes Oilfield Operations LLC Houston, TX 77073 (US)	(72) Inventors: YANG, Jianzhong Houston, TX 77073 (US) WANG, Xiaofeng Houston, TX 77073 (US) HARRELL, Bradley G. Houston, TX 77073 (US) NADRES, Enrico Houston, TX 77073 (US) ARENSDORF, Joseph Houston, TX 77073 (US) UGONO, Onome Houston, TX 77073 (US) (74) Representative: Dehns  10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)