(19)

(11)

EP 2 935 760 A1

(12)

(43) Date of publication: 28.10.2015 Bulletin 2015/44 (21) Application number: 12890440.6 (22) Date of filing: 21.12.2012

(51) International Patent Classification (IPC):  E21B 19/24(2006.01) E21B 17/02(2006.01) (86) International application number: PCT/US2012/071171 (87) International publication number: WO 2014/098885 (26.06.2014 Gazette 2014/26)

(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: ZHONG, Xiaoguang, Allan Plano, TX 75025 (US) MOELLER, Daniel, Keith NL-2241 AX Wassenaar Zuid-Holland (NL) (74) Representative: Bennett, Adrian Robert J. et al A.A. Thornton & Co. 10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)