METHOD AND APPARATUS FOR DRILLING PORTS IN UTILITY ACCESS SHAFTS OR MANHOLES

摘要

An apparatus for drilling a manhole includes a drill comprising a first motor and a drill bit. A rail extends longitudinally away from an exterior surface of the manhole. A carriage is movably engaged with the rail and is coupled to the drill. A mounting device supports the rail on an exterior of the manhole. The mounting device comprises features to transfer axial loading on the drill bit to the manhole. A method for drilling an opening in a manhole includes suspending a drill from a rail coupled to an exterior of the manhole. The rail extends laterally outwardly from the manhole. A drill bit forming part of the drill is rotated while moving the drill longitudinally along the rail toward the manhole. Axial reactive force generated by the drill is transferred to the manhole.

主权项

1. An apparatus for drilling a manhole, comprising:
a drill comprising a first motor and a drill bit; a rail extending longitudinally away from an exterior surface of the manhole; a carriage movably engaged with the rail and coupled to the drill; and a mounting device to support the rail on an exterior of the manhole, the mounting device comprising features to transfer axial loading on the drill bit to the manhole.