Patent ID: 8499834

Claim:
A milling tool for milling a hole in an obstruction within a tubular member, the apparatus comprising: a milling tool body with a distal end and a proximal end; a cutting section disposed on the milling tool body, the cutting section having a plurality of hardened cutters which will cut the obstruction to a maximum cutting diameter; a shaft portion disposed proximally from the cutting ection on the milling tool body; a wear pad disposed upon the cutting section and the shaft portion and being formed of a material that is softer than the material forming the hardened cutters, the wear pad being in engaging contact with the obstruction as the hole is milled; the wear pad extending radially outwardly from the shaft portion to an engagement diameter that exceeds the maximum cutting diameter; and a no-go centralizer sleeve circumferentially disposed around the shaft portion, the no-go centralizer sleeve presenting a stop shoulder to provide abutting contact with the obstruction to prevent further axial movement of the milling tool body.