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(11)

EP 3 119 988 A1

(12)

(43) Date of publication: 25.01.2017 Bulletin 2017/04 (21) Application number: 14891851.9 (22) Date of filing: 15.05.2014

(51) International Patent Classification (IPC):  E21B 47/12(2012.01) E21B 47/18(2012.01) E21B 47/13(2012.01) (86) International application number: PCT/US2014/038217 (87) International publication number: WO 2015/174990 (19.11.2015 Gazette 2015/46)

(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: MERRON, Matthew James Dallas, TX 75201 (US) WALTON, Zachary William Coppell, TX 75019 (US) RHODES, Robert William Duncan, OK 73533 (US) EIS, Andrew Spring, TX 77379 (US) (74) Representative: Bennett, Adrian Robert J. et al A.A. Thornton & Co. 10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)