Taper mills are designed specifically for milling through tight spots in tubulars. Heavy crushed carbide dressing increases on-bottom time, while ground OD and stabilizer pads eliminate the risk of cutting through the casing. Taper mills are recommended for cleaning out liners, tubing, and other collapsed or deformed tubulars. They can also be run ahead of other milling tools to clean out “bird nests.”
Taper mills are available in 3 -in to 17 -in sizes.