(19)

(11)

EP 4 334 569 A1

(12)

(43) Date of publication: 13.03.2024 Bulletin 2024/11 (21) Application number: 22799191.6 (22) Date of filing: 02.05.2022

(51) International Patent Classification (IPC):  E21B 37/00(2006.01) E21B 41/00(2006.01) E21B 43/01(2006.01) (52) Cooperative Patent Classification (CPC): E21B 41/0007 (86) International application number: PCT/NO2022/050099 (87) International publication number: WO 2022/235165 (10.11.2022 Gazette 2022/45)

(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: 05.05.2021 NO 20210561 (71) Applicant: Akofs Offshore Operation AS 0213 Oslo (NO)	(72) Inventors: FRITZMAN-LARSEN, Marius 1356 Bekkestua (NO) THOMMESEN, Steingrim 0349 Oslo (NO) (74) Representative: Bryn Aarflot AS  Patent Stortingsgata 8 0161 Oslo 0161 Oslo (NO)