Title:
【発明の名称】指向性ボーリング
Document Type and Number:
Japanese Patent JP2000505165
Kind Code:
A
Abstract:
A directional boring apparatus is disclosed where the apparatus is controlled through a method which includes deviating a drill head from a straight path into a desired direction angled away from the straight path. The deviation is achieved by applying an axial force to the drill head when a drill head cutting member is positioned within an arc of rotation through which the desired direction passes. The drill head is retracted when the cutting member is outside of the arc of rotation.
Inventors:
Rankist, Randy Earl
Rankin, James Earl
Van Hauwellingen, Mark
Rankin, James Earl
Van Hauwellingen, Mark
Application Number:
JP51299297A
Publication Date:
April 25, 2000
Filing Date:
August 06, 1996
Export Citation:
Assignee:
Vermia Manufacturing Company
International Classes:
E21B7/06; E21B7/08; E21B10/56; (IPC1-7): E21B7/08
Attorney, Agent or Firm:
Yoichiro Shimoda