(19)

(11)

EP 4 565 766 A1

(12)

(43) Date of publication: 11.06.2025 Bulletin 2025/24 (21) Application number: 23927276.8 (22) Date of filing: 11.12.2023

(51) International Patent Classification (IPC):  E21B 43/25(2006.01) E21B 43/28(2006.01) E21B 43/27(2006.01) E21B 43/16(2006.01) (52) Cooperative Patent Classification (CPC): E21B 43/27; E21B 43/162 (86) International application number: PCT/IB2023/062481 (87) International publication number: WO 2024/189424 (19.09.2024 Gazette 2024/38)

(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: KH MA MD TN (71) Applicant: Abu Dhabi National Oil Company Abu Dhabi 00971 (AE)	(72) Inventor: MOGENSEN, Kristian Abu Dhabi, Abu Dhabi 00971 (AE) (74) Representative: Bardehle Pagenberg Partnerschaft mbB Patentanwälte Rechtsanwälte  Prinzregentenplatz 7 81675 München 81675 München (DE)