(19)

(11)

EP 4 816 669 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24827165.2 (22) Date of filing: 27.11.2024

(51) International Patent Classification (IPC):  E21B 44/00(2006.01) (52) Cooperative Patent Classification (CPC): E21B 44/00; E21B 2200/22; E21B 17/01; E21B 47/001 (86) International application number: PCT/IB2024/061965 (87) International publication number: WO 2025/114934 (05.06.2025 Gazette 2025/23)

(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: GE KH MA MD TN (30) Priority: 01.12.2023 US 202318526655 (71) Applicant: Kongsberg Maritime AS 3616 Kongsberg (NO)	(72) Inventors: RUSSO, Massimiliano 3616 Kongsberg (NO) EILERTSEN, Lasse Eskil 3616 Kongsberg (NO) HAAKONSEN, Rune 3616 Kongsberg (NO) CANNY, Tomas 3616 Kongsberg (NO) REFSNES, Jon Erling 3616 Kongsberg (NO) (74) Representative: Zacco Norway AS  P.O. Box 488 Skøyen 0213 Oslo 0213 Oslo (NO)