(19)

(11)

EP 4 771 251 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24773224.1 (22) Date of filing: 29.08.2024

(51) International Patent Classification (IPC):  E21B 43/00(2006.01) E21B 44/00(2006.01) E21B 43/26(2006.01) (52) Cooperative Patent Classification (CPC): E21B 44/00; E21B 43/2607; E21B 43/00 (86) International application number: PCT/US2024/044309 (87) International publication number: WO 2025/049663 (06.03.2025 Gazette 2025/10)

(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: GE KH MA MD TN (30) Priority: 30.08.2023 US 202363579796 P 28.08.2024 US 202418817772 (71) Applicant: Nabors Drilling Technologies USA, Inc. Houston, TX 77067 (US)	(72) Inventors: HUSBAND, Frank J. Houston, TX 77067 (US) MANOCHA, Malini Houston, TX 77067 (US) OLIVER, Colin Houston, TX 77067 (US) (74) Representative: Forresters IP LLP  Skygarden Erika-Mann-Straße 11 80636 München 80636 München (DE)