(19)
(11) EP 2 257 686 A2

(12)

(88) Date of publication A3:
15.10.2009

(43) Date of publication:
08.12.2010 Bulletin 2010/49

(21) Application number: 09712067.9

(22) Date of filing: 17.02.2009
(51) International Patent Classification (IPC): 
E21B 10/48(2006.01)
 E21B 10/02(2006.01)
(86) International application number:
PCT/US2009/034271
(87) International publication number:
WO 2009/105420 (27.08.2009 Gazette 2009/35)
(84) Designated Contracting States:
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 SE SI SK TR
Designated Extension States:
AL BA RS

(30) Priority: 19.02.2008 US 29719

(71) Applicant: Baker Hughes Incorporated
Houston, TX 77027 (US)

(72) Inventors:
  • DICK, Aaron
    The Woodlands TX 77380 (US)
  • CURRY, David, A.
    The Woodlands TX 77380 (US)
  • KOLTERMANN, Terry, J.
    The Woodlands TX 77380 (US)
  • LIN, Chih
    The Woodlands TX 77380 (US)
  • SCOTT, Dan, E.
    The Woodlands TX 77380 (US)
  • ZAHRADNIK, Anton
    The Woodlands TX 77380 (US)
  • KIRWAN, Brendan, P.
    Clare (IE)

(74) Representative: Hano, Christian et al
v. Füner Ebbinghaus Finck Hano Patentanwälte Mariahilfplatz 3
81541 München
81541 München (DE)

   


(54) DOWNHOLE TOOL BEARING SYSTEM CONTAINING DIAMOND ENHANCED MATERIALS