Patent attributes
Disclosed are pit launched horizontal drilling devices suitable for drilling a substantially horizontal bore hole and laying pipe underground from a surface dug pit. The devices comprise a stationary frame and a carriage component competent to move forward and back along the frame and drill and retrieve an attached drill stem through an aperture in the frame, the device comprising mechanical linear actuator means for moving the carriage along said frame. The devices are compact, light-weight, easy to maneuver and suitable for utility contractor applications exhibiting on the order of about 800-15,000 lbs of push/pull force. Also disclosed herein are improved means and components for easily and quickly breaking drill stem joints, including integrated, positionable collar wrenches and breakout wrenches.
