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EP 2 742 205 A1

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(43) Date of publication: 18.06.2014 Bulletin 2014/25 (21) Application number: 11746110.3 (22) Date of filing: 11.08.2011

(51) International Patent Classification (IPC):  E21B 19/22(2006.01) E21B 17/20(2006.01) E21B 17/05(2006.01) (86) International application number: PCT/US2011/047351 (87) International publication number: WO 2013/022449 (14.02.2013 Gazette 2013/07)

(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: DIRKSEN, Ronald Johannes Spring, TX 77389 (US) EAST, Loyd Eddie, Jr. Tomball, TX 77377 (US) (74) Representative: HOFFMANN EITLE  Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)