(19)

(11)

EP 4 816 665 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24817024.3 (22) Date of filing: 14.11.2024

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) E21B 47/008(2012.01) (52) Cooperative Patent Classification (CPC): E21B 43/128; E21B 47/008 (86) International application number: PCT/US2024/055878 (87) International publication number: WO 2025/117193 (05.06.2025 Gazette 2025/23)

(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: 30.11.2023 US 202318525513 (71) Applicant: Saudi Arabian Oil Company Dhahran, 31311 (SA)	(72) Inventors: ALSHUNAIBER, Fahad, A. Dhahran 31311 (SA) ALGHAMDI, Anwar, S. Dhahran 31311 (SA) WINDIARTO, Yhossie, Sri Dhahran 31311 (SA) (74) Representative: Osha BWB  2, rue de la Paix 75002 Paris 75002 Paris (FR)