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(11)

EP 3 743 592 A1

(12)

(43) Date of publication: 02.12.2020 Bulletin 2020/49 (21) Application number: 19743782.5 (22) Date of filing: 24.01.2019

(51) International Patent Classification (IPC):  E21B 33/064(2006.01) E21B 47/06(2012.01) E21B 33/06(2006.01) E21B 4/00(2006.01) (86) International application number: PCT/US2019/014973 (87) International publication number: WO 2019/147827 (01.08.2019 Gazette 2019/31)

(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: 25.01.2018 US 201815879810 01.03.2018 US 201815909380 (71) Applicant: Cameron Technologies Limited 2514 JG The Hague (NL)

(72) Inventors: ZONOZ, Ray Sugar Land, Texas 77479 (US) CHEN, Xuming Katy, Texas 77494 (US) AMSELLEM, Olivier 92170 Clamart (FR) CHOUGNET-SIRAPIAN, Alice 92170 Clamart (FR) GIVENS, Matthew Houston, Texas 77040 (US) REZGUI, Fadhel 92140 Clamart (FR) ROBUTEL, Remi 92140 Clamart (FR) (74) Representative: Schlumberger Intellectual Property Department  Parkstraat 83 2514 JG Den Haag 2514 JG Den Haag (NL)