Patent ID: 8602123
Filing Date: 2013-12-10
Classification: E02D,E21B

Abstract:
1. An apparatus for excavating multiple shafts relative to a common target location, the apparatus comprising: a drill to excavate the multiple shafts; a motor to provide power to operate the drill; a platform having an opening for receiving a portion of the drill, the platform defining a first plane; a centering ring also having an opening for receiving a portion of the drill and detachably coupled to the platform in a second plane that is substantially parallel to the first plane, wherein the centering ring is adjustable relative to the platform to align a center point of the centering ring with the common target location; a rotating slide base also having an opening for receiving a portion of the drill and detachably coupled to the centering ring in a third plane that is substantially parallel to the first and second planes by one or more bearings arranged along a perimeter of the centering ring or the rotating slide base, the one or more bearings for rotating the rotating slide base, the drill and the motor about a center point of the rotating slide base; and a drill base slide plate coupled to the rotating slide base and the drill to adjust the drill along a line that is substantially parallel to the first, second and third planes.