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(11)

EP 4 264 012 A1

(12)

(43) Date of publication: 25.10.2023 Bulletin 2023/43 (21) Application number: 21908051.2 (22) Date of filing: 17.12.2021

(51) International Patent Classification (IPC):  E21B 44/00(2006.01) E21B 47/06(2012.01) E21B 47/008(2012.01) E21B 7/06(2006.01) (52) Cooperative Patent Classification (CPC): E21B 44/00; E21B 45/00; E21B 2200/20; E21B 7/04 (86) International application number: PCT/US2021/072988 (87) International publication number: WO 2022/133484 (23.06.2022 Gazette 2022/25)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 17.12.2020 US 202063199272 P (71) Applicants: Services Pétroliers Schlumberger 75007 Paris (FR) FR  GeoQuest Systems B.V. 2586 BJ 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 MK MT NL NO PL PT RO RS SE SI SK SM TR

(72) Inventors: BELASKIE, James Houston, Texas 77077 (US) HUGHES, Robert, Jr. Houston, Texas 77077 (US) WICKS, Nathaniel Cambridge, Massachusetts 02139 (US) FOLEY, James Katy, Texas 77493 (US) GUEDES DE CARVALHO, Rafael Katy, Texas 77493 (US) NKOUNKOU, Teddy Cheryl Michael Katy, Texas 77493 (US) (74) Representative: Schlumberger Intellectual Property Department  Parkstraat 83 2514 JG Den Haag 2514 JG Den Haag (NL)