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(11)

EP 4 264 013 A1

(12)

(43) Date of publication: 25.10.2023 Bulletin 2023/43 (21) Application number: 21911843.7 (22) Date of filing: 17.11.2021

(51) International Patent Classification (IPC):  E21B 47/06(2012.01) E21B 33/12(2006.01) E21B 43/12(2006.01) E21B 49/02(2006.01) E21B 47/12(2012.01) (52) Cooperative Patent Classification (CPC): E21B 49/006; E21B 49/00 (86) International application number: PCT/US2021/059615 (87) International publication number: WO 2022/139982 (30.06.2022 Gazette 2022/26)

(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: 21.12.2020 US 202063128575 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 MK MT NL NO PL PT RO RS SE SI SK SM TR

(72) Inventors: ELKHOURY, Jean, E. Cambridge, MA 02139 (US) BERARD, Thomas 92142 Clamart (FR) PEYRET, Emilie 011141 Bucharest (RO) PRIOUL, Romain Cambridge, MA 02139 (US) DE GENNARO, Vincenzo 64000 Pau (FR) (74) Representative: Schlumberger Intellectual Property Department  Parkstraat 83 2514 JG Den Haag 2514 JG Den Haag (NL)