Patent ID: 7712520

Claim:
A brush for removing debris from a well bore casing, the brush comprising: a cylindrical base ring having front and rear edges, an outer surface, and adapted to be affixed to well tools; and a plurality of bristle assemblies circumscribing the outer surface of the base ring, each bristle assembly including a plurality of bristles, the bristles extending radially outward from the bristle assembly, the bristles of the bristle assemblies forming a brushing surface having a front face and a rear face; wherein a channel extends through the brushing surface from the front face to the rear face and having a depth extending radially inward from the brushing surface, the channel being substantially free of bristles; and wherein each bristle assembly includes an inner member having a channeled cross-section, and a retaining ring; and wherein each bristle has first and second ends, the bristles extending around the retaining ring so that a portion of each bristle is located between the inner member and the retaining ring, the retaining ring securing the bristles to the inner member at approximately their center, and wherein the ends of each bristle extend radially from the bristle assembly.