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(11)

EP 4 816 490 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24822051.9 (22) Date of filing: 20.11.2024

(51) International Patent Classification (IPC):  C09K 8/54(2006.01) C23F 11/10(2006.01) C10G 75/02(2006.01) E21B 37/06(2006.01) (52) Cooperative Patent Classification (CPC): C09K 8/54; C09K 2208/32; C10G 75/02; C23F 11/10; C23F 11/149; C23F 11/145; C23F 11/126 (86) International application number: PCT/US2024/056637 (87) International publication number: WO 2025/117280 (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 202363604512 P (71) Applicant: ChampionX LLC Sugar Land, TX 77478 (US)	(72) Inventors: KUNG, Sherman Kin Yee Calgary, Alberta T3A5R4 (CA) MILLER, Nolan Calgary, Alberta T3E1B2 (CA) EL YAAKOBI, Feras Mohamed S. Chestermere, Alberta T1X1Z6 (CA) MOLONEY, Jeremy Katy, Texas 77450 (US) (74) Representative: Reddie & Grose LLP  The White Chapel Building 10 Whitechapel High Street London E1 8QS London E1 8QS (GB)