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(11)

EP 3 201 432 A1

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(43) Date of publication: 09.08.2017 Bulletin 2017/32 (21) Application number: 15846891.8 (22) Date of filing: 02.10.2015

(51) International Patent Classification (IPC):  E21B 44/00(2006.01) E21B 7/06(2006.01) E21B 47/02(2006.01) G05B 19/02(2006.01) (86) International application number: PCT/US2015/053846 (87) International publication number: WO 2016/054586 (07.04.2016 Gazette 2016/14)

(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: 02.10.2014 US 201462058950 P (71) Applicant: Hunt Advanced Drilling Technologies L.L.C. Dallas, TX 75201 (US)	(72) Inventors: BENSON, Todd, W. Dallas, TX 75201 (US) CHEN, Teddy Austin, TX 78731 (US) WILMES, Joel Spring, TX 77381 (US) (74) Representative: Uexküll & Stolberg  Partnerschaft von Patent- und Rechtsanwälten mbB Beselerstraße 4 22607 Hamburg 22607 Hamburg (DE)