(19)
(11) EP 1 606 488 A1

(12)

(43) Date of publication:
21.12.2005 Bulletin 2005/51

(21) Application number: 04713952.2

(22) Date of filing: 24.02.2004
(51) International Patent Classification (IPC)7E21B 10/56, E21B 10/42
(86) International application number:
PCT/IB2004/000472
(87) International publication number:
WO 2004/076800 (10.09.2004 Gazette 2004/37)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 26.02.2003 ZA 200301571

(71) Applicant: ELEMENT SIX (PTY) LTD
1559 Springs (ZA)

(72) Inventors:
  • ACHILLES, Roy, Derrick
    2007 Bedfordview (ZA)
  • TANK, Klaus
    Essexwold,2001 Johannesburg (ZA)
  • PARKER, Imraan
    7764 Cape Town (ZA)

(74) Representative: Johnstone, Helen Margaret 
Eric Potter Clarkson Park View House 58 The Ropewalk
Nottingham NG1 5DD
Nottingham NG1 5DD (GB)

   


(54) SECONDARY CUTTING ELEMENT FOR DRILL BIT