(19)

(11)

EP 2 900 912 A1

(12)

(43) Date of publication: 05.08.2015 Bulletin 2015/32 (21) Application number: 12885407.2 (22) Date of filing: 26.09.2012

(51) International Patent Classification (IPC):  E21B 44/00(2006.01) E21B 33/02(2006.01) (86) International application number: PCT/US2012/057344 (87) International publication number: WO 2014/051575 (03.04.2014 Gazette 2014/14)

(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 (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77072 (US)	(72) Inventors: BRUDER, Carlos, G. Houston, TX 77032 (US) OLSZEWSKI, Walter, K. Carrollton, TX 75006 (US) (74) Representative: Bennett, Adrian Robert J. et al A.A. Thornton & Co. 10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)