(19)
(11) EP 2 748 427 A2

(12)

(88) Date of publication A3:
16.05.2013

(43) Date of publication:
02.07.2014 Bulletin 2014/27

(21) Application number: 12831725.2

(22) Date of filing: 11.09.2012
(51) International Patent Classification (IPC): 
E21B 44/02(2006.01)
E21B 4/16(2006.01)
(86) International application number:
PCT/IB2012/054720
(87) International publication number:
WO 2013/038336 (21.03.2013 Gazette 2013/12)
(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

(30) Priority: 12.09.2011 US 201161533302 P

(71) Applicants:
  • Services Pétroliers Schlumberger
    75007 Paris (FR)

    FR 
  • Schlumberger Holdings Limited
    Tortola, British Virgin Islands 1110 (VG)

    GB NL 
  • Schlumberger Technology B.V.
    2514 JG The Hague (NL)

    AL AT BG CH CY CZ DE DK GR HR HU IE IT LI LT NO PL RO SI SK TR 
  • PRAD Research and Development Limited
    Road Town, Tortola (VG)

    BE EE ES FI IS LU LV MC MK MT PT RS SE SM 
  • Schlumberger Technology Corporation
    Sugar Land, TX 77478 (US)

    IS 

(72) Inventors:
  • TJHANG, Theodorus
    Sagamihara-Shi Kanagawa 252-0231 (JP)
  • KOBAYASHI, Yuichi
    Machida-Shi Tokyo 194-0035 (JP)
  • NAKAYAMA, Takeaki
    Machida-Shi Tokyo 194-0003 (JP)
  • NAKANOUCHI, Motohiro
    Hachioji-Shi Tokyo 192-0364 (JP)
  • SANTOSO, David
    Sagamihara-Shi Kanagawa 229-0011 (JP)

(74) Representative: Ford, Michael Frederick 
Schlumberger Cambridge Research Limited High Cross Madingley Road
Cambridge CB3 0EL
Cambridge CB3 0EL (GB)

   


(54) MULTI-SCHEME DOWNHOLE TOOL BUS SYSTEM AND METHODS