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The aggressiveness of this mill has a tendency to stall or over torque a downhole mud motor while drilling cement. We have had great success drilling composite plugs with this mill on a downhole mud motor however. This particular style of mill has also proven to be an excellent mill for drilling cement with tubing.
We highly recommend this style of mill for drilling cement with a downhole mud motor. This mill's less aggressive style and design has proven less likely to stall or over torque a downhole mud motor while drilling cement. This particular style of mill is our preferred choice as a pilot mill, in most applications, while on the bottom of a Hailey Underreamer.
We have had very good success using this particular style of mill as a pilot mill on the bottom of a Hailey Underreamer when dressing the top of tubing in certain downhole applications.
This particular style of mill has proven itself as a good, consistent, cement cutting mill. With the proper downhole weight, this particular style of mill can be run on a downhole mud motor or on the Bottom of a Hailey Underreamer as a pilot mill.
We've found this style of mill to be good for cement with trash or churt stringers in it, as well as for some composite plugs. Cutting can sometimes be inconsistent due to tooth placement. With proper tooth placement, we have found this to be a very good, aggressive mill.
This is a more expensive mill to run, yet the most consistent and successful mill for the removal of barium scale.
