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(11)

EP 3 074 585 A1

(12)

(43) Date of publication: 05.10.2016 Bulletin 2016/40 (21) Application number: 14864471.9 (22) Date of filing: 25.11.2014

(51) International Patent Classification (IPC):  E21B 10/26(2006.01) E21B 10/62(2006.01) E21B 10/43(2006.01) (86) International application number: PCT/US2014/067266 (87) International publication number: WO 2015/077749 (28.05.2015 Gazette 2015/21)

(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: 25.11.2013 US 201361908597 P 24.11.2014 US 201414551671 (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: SALVO, Vincente S. Spring, Texas 77386 (US) STEWART, Michael Spring, Texas 77379 (US) XIA, Sike Pearland, Texas 77584 (US) ISHAK, Georges Houston, Texas 77077 (US) (74) Representative: Schlumberger Cambridge Research Limited  Intellectual Property Law High Cross Madingley Road Cambridge CB3 0EL Cambridge CB3 0EL (GB)