Title:
【発明の名称】指向性掘削工具
Document Type and Number:
Japanese Patent JP2001520339
Kind Code:
A
Abstract:
A rotary-percussion device for directional drilling in rock comprises a substantially cylindrical, rotatable body portion (15) housing a percussion hammer, and a frustroconical head (2) eccentrically mounted on the front of the body portion. The minimum diameter face (3) of the head is adjacent to the body portion. The axis (6) of the head is parallel to but offset from the axis (5) of the body. The front face (4) of the head is chisel-shaped and comprises at least one oblique plane (11) sloping forwardly in the same direction as the offset of the head axis relative to the body axis.
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Inventors:
Guzeppe, Esposito
Application Number:
JP2000516130A
Publication Date:
October 30, 2001
Filing Date:
October 09, 1998
Export Citation:
Assignee:
Essay, Sochieta, A, Responsabilita, Limitata
International Classes:
E21B6/00; E21B6/02; E21B7/06; E21B7/08; E21B7/28; E21B10/46; E21B36/00; (IPC1-7): E21B7/08; E21B6/00; E21B7/28; E21B7/30; E21B10/46; E21B36/00
Attorney, Agent or Firm:
Kazuo Sato (3 others)