(19)
(11) EP 2 129 860 A1

(12)

(43) Date of publication:
09.12.2009 Bulletin 2009/50

(21) Application number: 08726771.2

(22) Date of filing: 12.03.2008
(51) International Patent Classification (IPC): 
E21B 10/573(2006.01)
E21B 10/55(2006.01)
(86) International application number:
PCT/US2008/003302
(87) International publication number:
WO 2008/112262 (18.09.2008 Gazette 2008/38)
(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: 13.03.2007 US 717905

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

(72) Inventors:
  • DUGGAN, James, L.
    Friendswood, TX 77546 (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) METHOD OF FORMING POCKETS FOR RECEIVING DRILL BIT CUTTING ELEMENTS