(19)
(11) EP 2 893 125 A1

(12)

(43) Date of publication:
15.07.2015 Bulletin 2015/29

(21) Application number: 13834902.2

(22) Date of filing: 06.09.2013
(51) International Patent Classification (IPC): 
E21B 34/06(2006.01)
E21B 34/08(2006.01)
(86) International application number:
PCT/US2013/058364
(87) International publication number:
WO 2014/039740 (13.03.2014 Gazette 2014/11)
(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: 08.09.2012 US 201261698629 P
08.09.2012 US 201261698627 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:
  • TIONG, Weng Keong
    640518 Singapore (SG)
  • WANG, Chao
    Missouri City, Texas 77459 (US)
  • LI, Yushan
    64167 Singapore (SG)

(74) Representative: Li, Boxi 
Schlumberger Cambridge Research Limited Intellectual Property Law High Cross Madingley Road
Cambridge CB3 0EL
Cambridge CB3 0EL (GB)

   


(54) GAS LIFT VALVE