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(11)

EP 4 448 918 A1

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(43) Date of publication: 23.10.2024 Bulletin 2024/43 (21) Application number: 21848501.9 (22) Date of filing: 15.12.2021

(51) International Patent Classification (IPC):  E21B 7/04(2006.01) E21B 47/06(2012.01) E21B 33/06(2006.01) (52) Cooperative Patent Classification (CPC): E21B 33/06; E21B 47/06; E21B 7/04 (86) International application number: PCT/US2021/072942 (87) International publication number: WO 2023/113839 (22.06.2023 Gazette 2023/25)

(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 (71) Applicant: Helmerich & Payne Technologies, LLC Tulsa, OK 74119 (US)	(72) Inventor: FOSSON, Adam Robert Tulsa, OK 74119 (US) (74) Representative: Uexküll & Stolberg  Partnerschaft von Patent- und Rechtsanwälten mbB Beselerstraße 4 22607 Hamburg 22607 Hamburg (DE)