(19)

(11)

EP 3 259 445 A1

(12)

(43) Date of publication: 27.12.2017 Bulletin 2017/52 (21) Application number: 16753058.3 (22) Date of filing: 18.02.2016

(51) International Patent Classification (IPC):  E21B 47/12(2012.01) E21B 47/20(2012.01) E21B 47/18(2012.01) (86) International application number: PCT/US2016/018464 (87) International publication number: WO 2016/134143 (25.08.2016 Gazette 2016/34)

(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: MA MD (30) Priority: 19.02.2015 US 201514625813 (71) Applicant: BAKER HUGHES, A GE COMPANY, LLC Houston, TX 77073 (US)	(72) Inventors: MAHMOUD, Sameh Amr Hassanein Houston, TX 77019-2118 (US) BRUNS, Jens Uwe Houston, TX 77019-2118 (US) EMMERICH, Wojciech Houston, TX 77019-2118 (US) GATZEN, Matthias Houston, TX 77019-2118 (US) (74) Representative: Lambacher, Michael et al V. Füner Ebbinghaus Finck Hano Patentanwälte Mariahilfplatz 3 81541 München 81541 München (DE)