Drill string stabilizers, roller reamers and drill collars are essential bottom hole assembly (BHA) components.
Stabilizers are designed to help ensure the quality of the drilled hole. Roller reamers widen the hole to the desired diameter. Drill collars are thick-walled, heavy components that provide weight to the drill bit and string, as well as mitigate the stresses that the drill pipe would not be able to withstand. Fabricated from high-strength steel, they are subject to a high degree of wear from abrasion, in combination with slurry erosion and impact.
To maintain the effectiveness of the components, hard, wear-resistant surface protection is applied. As some stabilizers are non-magnetic, other highly specialized wear-protection is needed.