Patent ID: 6464022
Filing Date: 2002-10-15
Classification: E21B

Abstract:
A mobile, horizontal directional boring apparatus connectable to an existing utility manhole for boring from the existing utility manhole, the apparatus comprising:a mobile platform locatable on a ground surface adjacent the existing utility manhole; and boring machinery comprising: a boring unit positionably supported on the mobile platform, a plurality of rods attachable end-to-end and operable under control of the boring unit to bore a pathway having a diameter and a vertical curvature and a horizontal curvature, the diameter including a diameter of two inches, and the horizontal curvature and the vertical curvature each including a curvature having a radius of ten feet, and a movable hollow arm assembly, the arm assembly having an internal diameter sufficient to receive the plurality of rods attached end-to-end, the arm assembly having a first end supported at the boring unit and located to sequentially receive the rods inserted therethrough, and the arm assembly having a second end connectable to an opening in a wall of a manhole to direct the rods through the opening.