Title:
柱列状連続孔を削孔するための設備
Document Type and Number:
Japanese Patent JP2011510187
Kind Code:
A
Abstract:
Equipment for drilling secant holes (2), constituted by a bit (4) inserted in the excavating hole (2) and by a guide system (7, 8), both of which are set in the hole (2) being drilled and a previously made hole (2'), the two systems being fixed with respect to one another in such a way as to define a pre-set distance between centers of the holes. The guide system (7, 8) is provided with first expandable surfaces (9) that can be pushed against the walls of the previous hole (2') up to obtain a centering of the equipment in the holes (2).
Inventors:
Ciepí, Maurizio
Application Number:
JP2010541755A
Publication Date:
March 31, 2011
Filing Date:
January 13, 2009
Export Citation:
Assignee:
SOILMEC S.P.A.
International Classes:
E21B7/00; E02D5/18; E02D5/20; E21B4/04
Domestic Patent References:
| JPH11293672A | 1999-10-26 | |||
| JP2002327589A | 2002-11-15 | |||
| JPH07293180A | 1995-11-07 | |||
| JPH11293672A | 1999-10-26 |
Foreign References:
| EP0580264A1 | 1994-01-26 | |||
| EP0580264A1 | 1994-01-26 |
Attorney, Agent or Firm:
Teruo Akimoto
Toshiro Ochi
Toshiro Ochi