Specialty Mills - Wellbore Cleaning Technology
CleanWell® specialty mills can be run on dedicated pipe trips or integrated with various types of cleanout or intervention runs. These mill systems are an integral, casing-friendly design used to assist with debris management and drift restoration.



Integral Stabilized Bladed Mill

The CleanWell® integral, stabilized bladed mill is designed to provide an aggressive milling or drillout performance without sacrificing downhole debris management. The four- or five-bladed mill helps ensure radial coverage and cleaning when drilling cement plugs, casing restrictions and downhole jewelry. The unique mill face downsizes debris, which supports hydraulic removal and uphole management. Stabilization mitigates the mill from walking or wobbling while drilling. The mill is equipped with large throats ideal for traditional displacements or reverse circulating. It is used in a variety of applications ranging from mud displacements to specialty post perforation cleanouts. These mills can be run as a stand-alone device or more commonly with other mechanical wellbore cleanout products.



Spiral Wrap String Mill

The CleanWell® Spiral Wrap String Mill is designed to restore casing drift and downsize debris generated during cased hole milling or drilling applications. The mill design provides a 360° smooth overlap OD when descending or ascending in the wellbore. Both upper and lower lead-tapered edges are dressed with tungsten, and the rotational edge of the maximum OD is also dressed with tungsten for restriction engagement and removal. Water-coursing gaps between the spiral blades support exceptional debris management practices without sacrificing abundant radial total flow area.

The mill is offered in opposing pitch options (left and right hand). It can also be dressed with PDC inserts for heavy restoration applications.

The mill is used in a variety of applications ranging from common single-trip drillout displacements to de-burring, post perforation specialty runs. The mill can be run as a stand-alone device for cleanout runs or more commonly integrate with other mechanical wellbore cleanout tools during various phases of the well construction process.