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EP 3 596 307 A1

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(43) Date of publication: 22.01.2020 Bulletin 2020/04 (21) Application number: 17900852.9 (22) Date of filing: 17.03.2017

(51) International Patent Classification (IPC):  E21B 47/01(2012.01) E21B 47/06(2012.01) E21B 17/10(2006.01) (86) International application number: PCT/US2017/022896 (87) International publication number: WO 2018/169542 (20.09.2018 Gazette 2018/38)

(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 (71) Applicant: Baker Hughes, a GE company, LLC Houston, TX 77073 (US)	(72) Inventors: DIGHE, Shailesh Shashank Houston, Texas 77073 (US) PATTERSON, Douglas Houston, Texas 77073 (US) REGENER, Thorsten Houston, Texas 77073 (US) (74) Representative: Lambacher, Michael  V. Füner Ebbinghaus Finck Hano Patentanwälte Mariahilfplatz 3 81541 München 81541 München (DE)