(19)

(11)

EP 3 374 601 A1

(12)

(43) Date of publication: 19.09.2018 Bulletin 2018/38 (21) Application number: 16895670.4 (22) Date of filing: 23.03.2016

(51) International Patent Classification (IPC):  E21B 47/00(2012.01) E21B 43/16(2006.01) E21B 47/10(2012.01) E21B 33/12(2006.01) (86) International application number: PCT/US2016/023734 (87) International publication number: WO 2017/164863 (28.09.2017 Gazette 2017/39)

(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 (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77032-3219 (US)	(72) Inventor: CANNING, Sean, Christopher Fulshear TX 77441 (US) (74) Representative: Hoffmann Eitle  Patent- und Rechtsanwälte PartmbB Arabellastraße 30 81925 München 81925 München (DE)