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(11)

EP 4 100 578 A1

(12)

(43) Date of publication: 14.12.2022 Bulletin 2022/50 (21) Application number: 21703268.9 (22) Date of filing: 03.02.2021

(51) International Patent Classification (IPC):  E02D 7/02(2006.01) E21B 10/32(2006.01) E02D 7/28(2006.01) (52) Cooperative Patent Classification (CPC): E21B 10/327; E02D 7/28; E02D 7/02; E02D 7/04 (86) International application number: PCT/EP2021/052565 (87) International publication number: WO 2021/156314 (12.08.2021 Gazette 2021/32)

(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: 03.02.2020 SE 2050113 (71) Applicant: A Hansson Holding AB 122 62 Enskede (SE)	(72) Inventor: HANSSON, Andreas 122 62 Enskede (SE) (74) Representative: AWA Sweden AB  Box 45086 104 30 Stockholm 104 30 Stockholm (SE)