(19)
(11) EP 2 122 112 A1

(12)

(43) Date of publication:
25.11.2009 Bulletin 2009/48

(21) Application number: 08725885.1

(22) Date of filing: 21.02.2008
(51) International Patent Classification (IPC): 
E21B 10/50(2006.01)
E21B 10/567(2006.01)
(86) International application number:
PCT/US2008/002295
(87) International publication number:
WO 2008/103413 (28.08.2008 Gazette 2008/35)
(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 MT NL NO PL PT RO SE SI SK TR

(30) Priority: 23.02.2007 US 710091

(71) Applicant: BAKER HUGHES INCORPORATED
Houston, TX 77210-4740 (US)

(72) Inventors:
  • LYONS, Nicholas, J.
    Houston, TX 77009 (US)
  • STEVENS, John, H.
    Spring, TX 77382 (US)
  • SMITH, Redd, H.
    The Woodlands, TX 77382 (US)

(74) Representative: Hano, Christian et al
v. Füner Ebbinghaus Finck Hano Mariahilfplatz 2 & 3
81541 München
81541 München (DE)

   


(54) DRILLING BIT HAVING A CUTTING ELEMENT. CO-SINTERED WITH A CONE STRUCTURE