(19)
(11) EP 2 847 413 A1

(12)

(43) Date of publication:
18.03.2015 Bulletin 2015/12

(21) Application number: 13788488.8

(22) Date of filing: 09.05.2013
(51) International Patent Classification (IPC): 
E21B 10/46(2006.01)
E21B 10/567(2006.01)
(86) International application number:
PCT/US2013/040422
(87) International publication number:
WO 2013/170083 (14.11.2013 Gazette 2013/46)
(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
Designated Extension States:
BA ME

(30) Priority: 11.05.2012 US 201261645833 P

(71) Applicant: Ulterra Drilling Technologies L.P.
Fort Worth, TX 76102 (US)

(72) Inventors:
  • MURDOCK, Andrew, David
    Fort Worth, TX 76108 (US)
  • MUMMA, Matthew Douglas
    Weatherford, TX 76087 (US)
  • CLEGG, John Martin
    Fort Worth, TX 76102 (US)
  • DUBOSE, William Henry
    Irving, TX 75060 (US)
  • BOWDEN, Neal Alan
    Mansfield, TX 76063 (US)

(74) Representative: Puschmann Borchert Bardehle Patentanwälte Partnerschaft mbB 
Bajuwarenring 21
82041 Oberhaching
82041 Oberhaching (DE)

   


(54) DIAMOND CUTTING ELEMENTS FOR DRILL BITS SEEDED WITH HCP CRYSTALLINE MATERIAL