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EP 2 732 130 A1

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(43) Date of publication: 21.05.2014 Bulletin 2014/21 (21) Application number: 11869316.7 (22) Date of filing: 12.07.2011

(51) International Patent Classification (IPC):  E21B 47/06(2012.01) G01V 9/00(2006.01) E21B 47/00(2012.01) G01V 3/18(2006.01) (86) International application number: PCT/US2011/043750 (87) International publication number: WO 2013/009305 (17.01.2013 Gazette 2013/03)

(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) Inventor: JEFFRIES, Stuart M. Anchorage, AK 99518 (US) (74) Representative: Bennett, Adrian Robert J. et al A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)