(19)

(11)

EP 4 584 472 A1

(12)

(43) Date of publication: 16.07.2025 Bulletin 2025/29 (21) Application number: 22963368.0 (22) Date of filing: 28.10.2022

(51) International Patent Classification (IPC):  E21B 34/00(2006.01) E21B 23/00(2006.01) E21B 34/06(2006.01) (52) Cooperative Patent Classification (CPC): E21B 34/06; E21B 2200/05 (86) International application number: PCT/IB2022/060372 (87) International publication number: WO 2024/089451 (02.05.2024 Gazette 2024/18)

(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 Company for Onshore Petroleum Operations Limited Abu Dhabi (AE)	(72) Inventor: AHMAD, Mohamad Hussain Abu Dhabi (AE) (74) Representative: Bardehle Pagenberg Partnerschaft mbB Patentanwälte Rechtsanwälte  Prinzregentenplatz 7 81675 München 81675 München (DE)