(19)
(11) EP 1 716 312 A1

(12)

(43) Date of publication:
02.11.2006 Bulletin 2006/44

(21) Application number: 05711018.1

(22) Date of filing: 31.01.2005
(51) International Patent Classification (IPC): 
E21B 17/10(2006.01)
E21B 21/12(2006.01)
 E21B 17/18(2006.01)
(86) International application number:
PCT/SE2005/000111
(87) International publication number:
WO 2005/080743 (01.09.2005 Gazette 2005/35)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

(30) Priority: 20.02.2004 SE 0400402

(71) Applicant: Atlas Copco Rock Drills AB
701 91 Örebro (SE)

(72) Inventor:
  • HARTWIG, Sverker
    S-187 33 Täby (SE)

(74) Representative: Janson, Ronny 
Ehrner & Delmar Patentbyra AB, Box 10316
100 55 Stockholm
100 55 Stockholm (SE)

   


(54) DRILL STRING COMPONENT, WEAR PROTECTION COMPONENT AND CUTTER HEAD FOR USE IN A ROCK DRILLING PROCESS