(19)

(11)

EP 4 018 077 A1

(12)

(43) Date of publication: 29.06.2022 Bulletin 2022/26 (21) Application number: 19787412.6 (22) Date of filing: 23.08.2019

(51) International Patent Classification (IPC):  E21B 43/14(2006.01) E21B 43/12(2006.01) (52) Cooperative Patent Classification (CPC): E21B 2200/22; E21B 2200/20; E21B 43/14; E21B 43/12 (86) International application number: PCT/IB2019/000959 (87) International publication number: WO 2021/038262 (04.03.2021 Gazette 2021/09)

(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: TOTAL SE 92400 Courbevoie (FR)	(72) Inventor: BERGEY, Pierre 78100 Saint Germain en Laye (FR) (74) Representative: Plasseraud IP  66, rue de la Chaussée d'Antin 75440 Paris Cedex 09 75440 Paris Cedex 09 (FR)