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(11)

EP 4 573 263 A1

(12)

(43) Date of publication: 25.06.2025 Bulletin 2025/26 (21) Application number: 23768702.5 (22) Date of filing: 17.08.2023

(51) International Patent Classification (IPC):  E21B 7/00(2006.01) E21B 7/20(2006.01) E21B 10/64(2006.01) E21B 7/04(2006.01) E21B 10/26(2006.01) (52) Cooperative Patent Classification (CPC): E21B 7/002; E21B 7/046; E21B 7/20; E21B 10/265; E21B 10/64 (86) International application number: PCT/US2023/030457 (87) International publication number: WO 2024/039772 (22.02.2024 Gazette 2024/08)

(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: 19.08.2022 US 202263399416 P (71) Applicant: Michels Corporation Brownsville, WI 53006-0128 (US)	(72) Inventors: MUELLER, Jeffrey Scott Brownsville, WI 53006 (US) JACKSON, Ryan David Brownsville, WI 53006 (US) (74) Representative: Forresters IP LLP  Skygarden Erika-Mann-Straße 11 80636 München 80636 München (DE)