(19)
(11) EP 2 619 396 A1

(12)

(43) Date of publication:
31.07.2013 Bulletin 2013/31

(21) Application number: 11757880.7

(22) Date of filing: 20.09.2011
(51) International Patent Classification (IPC): 
E21B 10/36(2006.01)
(86) International application number:
PCT/EP2011/066323
(87) International publication number:
WO 2012/038428 (29.03.2012 Gazette 2012/13)
(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

(30) Priority: 22.09.2010 EP 10178387

(71) Applicant: Sandvik Intellectual Property AB
811 81 Sandviken (SE)

(72) Inventors:
  • ESKO, Mauri
    FI-39500 Ikaalinen (FI)
  • KESKINIVA, Markku
    FI-33410 Tampere (FI)
  • PIISPANEN, Juha
    FI-33310 Tampere (FI)
  • LEMMETTY, Pauli
    FI-33880 Lempäälä (FI)

   


(54) A ROCK DRILL BIT FOR PERCUSSIVE DRILLING AND A ROCK DRILL BIT BUTTON