(19)

(11)

EP 4 127 384 A1

(12)

(43) Date of publication: 08.02.2023 Bulletin 2023/06 (21) Application number: 21713946.8 (22) Date of filing: 23.03.2021

(51) International Patent Classification (IPC):  E21B 19/10(1968.09) E21B 21/01(2000.01) E21B 19/16(1968.09) (52) Cooperative Patent Classification (CPC): E21B 19/10; E21B 19/16; E21B 21/01 (86) International application number: PCT/EP2021/057389 (87) International publication number: WO 2021/197915 (07.10.2021 Gazette 2021/40)

(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: 30.03.2020 NL 2025237 (71) Applicant: Itrec B.V. 3115 HH Schiedam (NL)	(72) Inventor: WIJNING, Diederick Bernardus 3115 HH Schiedam (NL) (74) Representative: EP&C  P.O. Box 3241 2280 GE Rijswijk 2280 GE Rijswijk (NL)