Directional boring head with blade assembly

Details Directional boring head with blade assembly Directional boring head with blade assembly

1998-06-22

1999-08-24

Tsay, Frank

Boring or penetrating the earth

Processes

Boring horizontal bores

175376, E21B 700, E21B 1000

Patent

active

059413220

ABSTRACT:
A method and apparatus for deviating the direction of a borehole. The method comprises the steps of rotating a boring head underground through a material which is to be cut and oscillates the boring head to achieve a desired direction change. The boring head has one or more roller cones and may further comprise a deflection structure. The deflection structure may be separately mountable to the boring head or may be integrally formed with the boring head. The boring head is rotated to bore a generally straight hole. To change direction, the roller cone is oriented to achieve the desired direction change and oscillated to deviate the direction of the borehole. Oscillation of the roller cone may be carried out by oscillating the drill string, the boring head and/or the roller cone.

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