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EP 2 872 732 A1

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(43) Date of publication: 20.05.2015 Bulletin 2015/21 (21) Application number: 12884551.8 (22) Date of filing: 12.09.2012

(51) International Patent Classification (IPC):  E21B 33/126(2006.01) F16J 15/40(2006.01) E21B 33/122(2006.01) (86) International application number: PCT/US2012/054899 (87) International publication number: WO 2014/042631 (20.03.2014 Gazette 2014/12)

(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) Inventor: AHMED, Mohamed, A. Carrollton, TX 75006 (US) (74) Representative: Hoffmann Eitle  Patent- und Rechtsanwälte PartmbB Arabellastraße 30 81925 München 81925 München (DE)