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(11)

EP 2 715 032 A1

(12)

(43) Date of publication: 09.04.2014 Bulletin 2014/15 (21) Application number: 11866449.9 (22) Date of filing: 02.06.2011

(51) International Patent Classification (IPC):  E21B 10/00(2006.01) (86) International application number: PCT/US2011/038839 (87) International publication number: WO 2012/166138 (06.12.2012 Gazette 2012/49)

(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 (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77072 (US)	(72) Inventors: WEAVER, Gary, E. Conroe, TX 77385 (US) MENEZES, Clive, D. Conroe, TX 77384 (US) (74) Representative: Bennett, Adrian Robert J. et al A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)