(19)

(11)

EP 2 904 192 A1

(12)

(43) Date of publication: 12.08.2015 Bulletin 2015/33 (21) Application number: 13844016.9 (22) Date of filing: 27.09.2013

(51) International Patent Classification (IPC):  E21B 34/06(2006.01) E21B 34/08(2006.01) (86) International application number: PCT/US2013/062086 (87) International publication number: WO 2014/055332 (10.04.2014 Gazette 2014/15)

(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: 01.10.2012 US 201213632661 (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77072 (US)	(72) Inventor: PACEY, Kendall Lee Duncan, Oklahoma 73533 (US) (74) Representative: King, Lawrence  A.A. Thornton & Co. 10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)