(19)

(11)

EP 2 368 014 A1

(12)

(43) Date of publication: 28.09.2011 Bulletin 2011/39 (21) Application number: 09799806.6 (22) Date of filing: 15.12.2009

(51) International Patent Classification (IPC):  E21B 43/10(2006.01) E21B 23/01(2006.01) E21B 19/16(2006.01) (86) International application number: PCT/US2009/068008 (87) International publication number: WO 2010/075062 (01.07.2010 Gazette 2010/26)

(84) Designated Contracting States: 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 SE SI SK SM TR (30) Priority: 23.12.2008 US 342718 (71) Applicant: Halliburton Energy Service, Inc. Houston, TX 77072 (US)	(72) Inventors: WATSON, Brock, W. Carrollton TX 75006 (US) MOELLER, Daniel, K. Carrollton TX 75006 (US) KOHN, Gary, A. Carrollton TX 75006 (US) (74) Representative: Bennett, Adrian Robert J. et al A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)