(19)

(11)

EP 2 895 680 A1

(12)

(43) Date of publication: 22.07.2015 Bulletin 2015/30 (21) Application number: 13836580.4 (22) Date of filing: 23.08.2013

(51) International Patent Classification (IPC):  E21B 21/01(2006.01) E21B 27/02(2006.01) E21B 21/06(2006.01) (86) International application number: PCT/US2013/056333 (87) International publication number: WO 2014/042844 (20.03.2014 Gazette 2014/12)

(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 (30) Priority: 13.09.2012 US 201213614053 (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77072 (US)	(72) Inventors: KAGELER, Paul, L. Lake Jackson, TX 77566 (US) DEEN, Larry, R. Spring, TX 77388 (US) DALTON, Ferrill, G. Kingwood, TX 77339 (US) (74) Representative: Bennett, Adrian Robert J. et al A.A. Thornton & Co. 10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)