(19)

(11)

EP 4 444 991 A1

(12)

(43) Date of publication: 16.10.2024 Bulletin 2024/42 (21) Application number: 22835328.0 (22) Date of filing: 09.12.2022

(51) International Patent Classification (IPC):  E21B 47/11(2012.01) E21B 47/12(2012.01) (52) Cooperative Patent Classification (CPC): E21B 47/12; E21B 47/11 (86) International application number: PCT/EP2022/085218 (87) International publication number: WO 2023/105060 (15.06.2023 Gazette 2023/24)

(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 (30) Priority: 10.12.2021 GB 202117920 (71) Applicant: Resman AS 7053 Ranheim (NO)	(72) Inventor: MØLSTRE, Øystein 7053 Ranheim (NO) (74) Representative: Lincoln IP  4 Rubislaw Place Aberdeen AB10 1XN Aberdeen AB10 1XN (GB)