(19)

(11)

EP 4 028 630 A1

(12)

(43) Date of publication: 20.07.2022 Bulletin 2022/29 (21) Application number: 20879225.9 (22) Date of filing: 30.09.2020

(51) International Patent Classification (IPC):  E21B 19/02(2006.01) E21B 17/12(2006.01) E21B 17/00(2006.01) E21B 17/20(2006.01) E21B 15/02(2006.01) (52) Cooperative Patent Classification (CPC): E21B 17/20; E21B 15/02; E21B 17/017; E21B 19/22 (86) International application number: PCT/US2020/053398 (87) International publication number: WO 2021/080752 (29.04.2021 Gazette 2021/17)

(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: 21.10.2019 US 201962924045 P (71) Applicant: Oceaneering International, Inc. Houston, Texas 77041 (US)	(72) Inventor: CARLSEN, Torleif 4337 Sandnes (NO) (74) Representative: Potter, Julian Mark  WP Thompson 1 Mann Island Liverpool L3 1BP Liverpool L3 1BP (GB)