Patent ID: 8127851

Claim:
A system for the removal of plugs from a wellbore, the system comprising: a motor connected to an end of a coiled tubing; and a mill having a bladed cutting structure, the mill being connected to the motor, the mill comprising at least three wash ports and a central port being in fluid communication with the coiled tubing, the central port being adapted to communicate fluid directly through an opening in a plug, thereby allowing the fluid to circulate proppant up past the plug in order to facilitate removal of the plug; wherein the central port of the mill and the wash ports are adapted such that at least 30% of the fluid flows through the central port and is configured to produce a rate at which the proppant circulates up past the plug that is greater than a rate exhibited if less than 30% of the fluid flows through the central port and wherein the central port is offset from a true center-line of the mill, but within a degree of offset from the true center-line still allowing the fluid, communicated through the central port to flow directly through the opening in the plug, the cutting structure extending across the center-line of the mill.