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(11)

EP 3 030 740 A1

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(43) Date of publication: 15.06.2016 Bulletin 2016/24 (21) Application number: 14834115.9 (22) Date of filing: 07.08.2014

(51) International Patent Classification (IPC):  E21B 17/00(2006.01) E21B 47/024(2006.01) E21B 17/18(2006.01) (86) International application number: PCT/US2014/050093 (87) International publication number: WO 2015/021246 (12.02.2015 Gazette 2015/06)

(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 (30) Priority: 07.08.2013 US 201361863163 P (71) Applicants: Services Pétroliers Schlumberger 75007 Paris (FR) FR  Schlumberger Holdings Limited Road Town, Tortola 1110 (VG) GB NL  Schlumberger Technology B.V. 2514 JG The Hague (NL) AL AT BE BG CH CY CZ DE DK EE ES FI GR HR HU IE IS IT LI LT LU LV MC MK MT NO PL PT RO RS SE SI SK SM TR

(72) Inventors: PERSCHKE, Malcolm Spring, Texas 77386 (US) POEDJONO, Benny Sugar Land, Texas 77478 (US) BILLEAUD, Stephen Houston, Texas 77006 (US) (74) Representative: Schlumberger Cambridge Research Limited  Intellectual Property Law High Cross Madingley Road Cambridge CB3 0EL Cambridge CB3 0EL (GB)