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(11)

EP 4 259 899 A1

(12)

(43) Date of publication: 18.10.2023 Bulletin 2023/42 (21) Application number: 22704233.0 (22) Date of filing: 28.01.2022

(51) International Patent Classification (IPC):  E21B 34/02(2006.01) E21B 34/08(2006.01) E21B 43/08(2006.01) E21B 43/12(2006.01) (52) Cooperative Patent Classification (CPC): E21B 43/08; E21B 34/08; E21B 43/12 (86) International application number: PCT/US2022/014282 (87) International publication number: WO 2022/165155 (04.08.2022 Gazette 2022/31)

(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: 28.01.2021 US 202117160568 (71) Applicant: Saudi Arabian Oil Company Dhahran 31311 (SA)	(72) Inventors: SAYEDAKRAM, Nawaf I. Dhahran 31311 (SA) ALTOUKHI, Bilal H. Dhahran 31311 (SA) (74) Representative: Fish & Richardson P.C.  Highlight Business Towers Mies-van-der-Rohe-Straße 8 80807 München 80807 München (DE)