Milling tool is a kind of tool for milling the fishes. Such as
bits, cone, cutter gauge, slip elements, swivel wash pipes, subs, parts of
deep-well pump, etc.
The flat bottom
and concave junk mill milling the fishes with the effect of drilling pressure
by the YD alloy and anti-abrasive material on its bottom surface. The junk was
carried out of well by the drilling fluid.