(19)
(11) EP 2 222 932 A1

(12)

(43) Date of publication:
01.09.2010 Bulletin 2010/35

(21) Application number: 08850570.6

(22) Date of filing: 14.11.2008
(51) International Patent Classification (IPC): 
E21B 10/14(2006.01)
(86) International application number:
PCT/US2008/083532
(87) International publication number:
WO 2009/064969 (22.05.2009 Gazette 2009/21)
(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 MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 16.11.2007 US 988718 P
02.04.2008 US 61536

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

(72) Inventors:
  • ZAHRADNIK, Anton
    The Woodlands TX 77380 (US)
  • PESSIER, Rudolph, C.O.
    The Woodlands TX 77380 (US)
  • NGUYEN, Don, Q.
    The Woodlands TX 77380 (US)
  • MEINERS, Matthew, J.
    The Woodlands TX 77380 (US)
  • CEPEDA, Karlos, B.
    The Woodlands TX 77380 (US)
  • DAMSCHEN, Michael, Steven
    The Woodlands TX 77380 (US)
  • BLACKMAN, Mark, P.
    The Woodlands TX 77380 (US)

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

   


(54) HYBRID DRILL BIT AND DESIGN METHOD