(19)

(11)

EP 2 914 986 A1

(12)

(43) Date of publication: 09.09.2015 Bulletin 2015/37 (21) Application number: 12890762.3 (22) Date of filing: 28.12.2012

(51) International Patent Classification (IPC):  G01V 3/00(2006.01) (86) International application number: PCT/US2012/072080 (87) International publication number: WO 2014/105051 (03.07.2014 Gazette 2014/27)

(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: RODNEY, Paul F. Spring, Texas 77389 (US) LYLE, David Houston, Texas 77004 (US) (74) Representative: Jennings, Michael John et al A.A. Thornton & Co. 10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)