(19)

(11)

EP 2 459 844 A1

(12)

(43) Date of publication: 06.06.2012 Bulletin 2012/23 (21) Application number: 09847914.0 (22) Date of filing: 30.07.2009

(51) International Patent Classification (IPC):  E21B 43/00(2006.01) (86) International application number: PCT/US2009/052227 (87) International publication number: WO 2011/014171 (03.02.2011 Gazette 2011/05)

(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 (71) Applicant: Halliburton Energy Services, Inc. Houston, Texas 77072 (US)	(72) Inventors: SAEED, Saad Houston TX 77072 (US) POOL, Charles M. Carrollton TX 75006 (US) URIAS, Frank Carrollton TX 75006 (US) LOVORN, James, R. Houston TX 77032 (US) BAKRI, Emad Houston TX 77032 (US) (74) Representative: Bennett, Adrian Robert J.  A.A. Thornton & Co. Mechanical 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)