(19)

(11)

EP 4 584 521 A2

(12)

(88) Date of publication A3: 18.04.2024 (43) Date of publication: 16.07.2025 Bulletin 2025/29 (21) Application number: 23782596.3 (22) Date of filing: 05.09.2023

(51) International Patent Classification (IPC):  F16L 1/26(2006.01) F16J 15/00(2006.01) F16L 55/168(2006.01) F16L 55/18(2006.01) E21B 1/00(2006.01) F16L 17/00(2006.01) F16L 55/17(2006.01) (52) Cooperative Patent Classification (CPC): F16L 1/26; F16L 55/168; F16L 55/1683; F16L 55/171; F16L 17/00; F16J 15/00; F16L 55/18; F16J 15/122; F16J 15/3204; E21B 41/0007; E21B 43/01 (86) International application number: PCT/IB2023/058772 (87) International publication number: WO 2024/052812 (14.03.2024 Gazette 2024/11)

(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: 06.09.2022 IT 202200018195 (71) Applicant: Saipem S.p.A. 20138 Milano (IT)	(72) Inventors: ZIERO, Loris 20138 MILANO (IT) LAZZARIN, Diego 20138 MILANO (IT) BRUNO, Diego 20138 MILANO (IT) (74) Representative: Studio Torta S.p.A.  Via Viotti, 9 10121 Torino 10121 Torino (IT)