Title:
掘削工具
Document Type and Number:
Japanese Patent JP2009532601
Kind Code:
A
Abstract:
The invention relates to a drilling tool comprising: two pairs of rotary drums in axial alignment on parallel axes; a motor mechanism for driving rotation of the drums; a support element; and a support structure on which the drums are mounted to rotate and serving to connect the drums to the support element; the tool being characterized in that the motor mechanism is mounted inside the drums and in that the support structure comprises a plate forming bearings at its bottom ends for the drums; and a mounting pad for fastening to the support element.
Inventors:
Shannon philip
Mathieu Fabrice
Perpeza daniel
Ligure Jean-Claude
Mathieu Fabrice
Perpeza daniel
Ligure Jean-Claude
Application Number:
JP2009503630A
Publication Date:
September 10, 2009
Filing Date:
April 04, 2007
Export Citation:
Assignee:
Company De Sol
International Classes:
E21B10/54
Domestic Patent References:
| JP2004257234A | 2004-09-16 | |||
| JPS564692B2 | 1981-01-31 | |||
| JPH0721624Y2 | 1995-05-17 | |||
| JPH0663254B2 | 1994-08-22 |
Attorney, Agent or Firm:
Yoshiyuki Kaji
Makoto Suhara
Makoto Suhara