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EP 4 680 834 A1

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(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 24789302.7 (22) Date of filing: 09.04.2024

(51) International Patent Classification (IPC):  E21B 41/00(2006.01) E21B 47/06(2012.01) E21B 47/117(2012.01) (52) Cooperative Patent Classification (CPC): E21B 47/117; E21B 2200/20 (86) International application number: PCT/US2024/023685 (87) International publication number: WO 2024/215646 (17.10.2024 Gazette 2024/42)

(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: 11.04.2023 US 202363495404 P (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: BAILEY, William Cambridge, Massachusetts 02139 (US) TILKE, Peter Cambridge, Massachusetts 02139 (US) (74) Representative: Schlumberger Intellectual Property Department  Parkstraat 83 2514 JG Den Haag 2514 JG Den Haag (NL)