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(11)

EP 4 416 370 A1

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(43) Date of publication: 21.08.2024 Bulletin 2024/34 (21) Application number: 22786080.6 (22) Date of filing: 29.09.2022

(51) International Patent Classification (IPC):  E21B 33/13(2006.01) E21B 33/138(2006.01) E21B 36/04(2006.01) E21B 33/134(2006.01) E21B 36/00(2006.01) (52) Cooperative Patent Classification (CPC): E21B 33/13; E21B 33/134; E21B 33/138; E21B 36/008; E21B 36/04 (86) International application number: PCT/GB2022/052471 (87) International publication number: WO 2023/062335 (20.04.2023 Gazette 2023/16)

(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: 11.10.2021 GB 202114521 (71) Applicant: BiSN Tec Ltd Birchwood Warrington Cheshire WA3 6DE (GB)	(72) Inventors: CARRAGHER, Paul Warrington Cheshire WA3 6DE (GB) MOODY, Mike Warrington Cheshire WA3 6DE (GB) CHANCELLOR, Bobby Warrington Cheshire WA3 6DE (GB) DEARMON, Jake Warrington Cheshire WA3 6DE (GB) (74) Representative: Forresters IP LLP  Skygarden Erika-Mann-Straße 11 80636 München 80636 München (DE)