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EP 4 824 188 A1

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(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 25736150.1 (22) Date of filing: 02.01.2025

(51) International Patent Classification (IPC):  C09K 8/32(2006.01) C09K 23/22(2022.01) C09K 8/035(2006.01) C09K 23/28(2022.01) (52) Cooperative Patent Classification (CPC): C09K 23/018; C09K 23/38; C09K 23/46; C09K 8/36; C09K 8/035 (86) International application number: PCT/US2025/010045 (87) International publication number: WO 2025/147485 (10.07.2025 Gazette 2025/28)

(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: 05.01.2024 US 202418405513 (71) Applicants: Services Pétroliers Schlumberger 75007 Paris (FR) FR  Schlumberger Technology B.V. 2514 JG The Hague (NL) AL AT BE BG CH CY CZ DE DK EE ES FI 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

(72) Inventors: KHRAMOV, Dimitri Houston, Texas 77072 (US) BARMATOV, Evgeny Cambridge Cambridgeshire CB3 0EL (GB) (74) Representative: Schlumberger Intellectual Property Department  Parkstraat 83 2514 JG Den Haag 2514 JG Den Haag (NL)