(19)

(11)

EP 4 334 568 A1

(12)

(43) Date of publication: 13.03.2024 Bulletin 2024/11 (21) Application number: 22727831.4 (22) Date of filing: 04.05.2022

(51) International Patent Classification (IPC):  E21B 23/00(2006.01) E21B 43/112(2006.01) (52) Cooperative Patent Classification (CPC): E21B 43/112; E21B 23/006 (86) International application number: PCT/EP2022/061974 (87) International publication number: WO 2022/233933 (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 DK PA202100465 (71) Applicant: Welltec A/S 3450 Allerød (DK)	(72) Inventor: MOURANI, Houssam 3400 Allerød (DK) (74) Representative: Dragsted Partners A/S  Rådhuspladsen 16 1550 Copenhagen V 1550 Copenhagen V (DK)