Title:
PERCUSSIVE ROCK DRILL BIT WITH OPTIMISED GAUGE BUTTONS
Document Type and Number:
WIPO Patent Application WO/2015/062833
Kind Code:
A3
Abstract:
A percussive rock drill bit (100) having a plurality of peripheral gauge buttons (115) distributed circumferentially around an axially forwardmost collar at the drill head (101). The gauge buttons are grouped into pairs such that the central axes (121) of neighbouring gauge buttons are aligned substantially parallel to one another and are not centred on a longitudinal axis (119) of the bit. Enlarged flushing grooves (113) are provided at the annular collar to provide a segmented collar configuration optimised for flushing cut material rearwardly from the drill bit.
Inventors:
MATTSON PER (SE)
PERSSON MAGNUS (SE)
PERSSON MAGNUS (SE)
Application Number:
PCT/EP2014/071647
Publication Date:
July 16, 2015
Filing Date:
October 09, 2014
Export Citation:
Assignee:
SANDVIK INTELLECTUAL PROPERTY (SE)
International Classes:
E21B10/36; E21B10/38; E21B10/56
Domestic Patent References:
| WO2008066445A1 | 2008-06-05 | |||
| WO2012174607A1 | 2012-12-27 |
Foreign References:
| US3955635A | 1976-05-11 | |||
| US20060060389A1 | 2006-03-23 |
Attorney, Agent or Firm:
HAMMARSJÖ, Joakim (Sandviken, SE)
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