Underreamer Operation Features & Maintenance

Roller & Drag Underreamers – Features & Maintenance Overview Roller Cone and Drag Type Underreamers are just two more examples of our goal to bring expensive Oil Field technology to other drilling markets at an economical cost. We have been manufacturing both types of Underreamer designs for over 20 years and based on the feedback from […]

Roller Cone Underreamers

Mills Machine Company has been manufacturing and continually improving the design of its Roller Cone Underreamer for over twenty years. The design is simple, yet rugged enough to provide the most efficient operation for opening up a hole.

Drag Type Underreamers

Mills Machine Company has been manufacturing and continually improving the design of its Drag Type (Blade) Underreamer for over twenty years. The design is simple, yet rugged enough to provide the most efficient operation for opening up a soft to medium formation hole.