(19)

(11)

EP 3 194 721 A1

(12)

(43) Date of publication: 26.07.2017 Bulletin 2017/30 (21) Application number: 15827066.0 (22) Date of filing: 29.07.2015

(51) International Patent Classification (IPC):  E21B 47/12(2012.01) E21B 17/00(2006.01) E21B 47/18(2012.01) (86) International application number: PCT/US2015/042668 (87) International publication number: WO 2016/019022 (04.02.2016 Gazette 2016/05)

(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 (30) Priority: 30.07.2014 US 201414446987 (71) Applicant: Baker Hughes Incorporated Houston, TX 77073 (US)	(72) Inventors: MUELLER, Stephan Houston, TX 77019-2118 (US) RODERS, Ingo Houston, TX 77019-2118 (US) FOLBERTH, Martin Houston, TX 77019-2118 (US) SCHOENBORN, Kai Houston, TX 77019-2118 (US) (74) Representative: Lambacher, Michael et al Euromarkpat V. Füner Ebbinghaus Finck Hano Mariahilfplatz 3 81541 München 81541 München (DE)