Patent ID: 8376043

Claim:
A downhole tool for connection in a tubing string for use in cleaning wellbores, comprising: a mandrel assembly comprising an elongated tubular mandrel with a passageway extending axially through the mandrel and a retainer mounted on the mandrel such that relative axial and rotational movement with respect to the mandrel is limited, the retainer having a cylindrical outer surface, at least one axially extending groove and one annular groove formed in the outer surface; and a wellbore cleaning element mounted to extend from the exterior of the mandrel into contact with the wellbore when the tubing string and tool are moved within the wellbore; and a sleeve mounted on the exterior of the mandrel for contacting the wellbore, axially extending ribs on the interior of the sleeve of a size and shape to mate with the ribs on the exterior of the retainer to restrict relative rotation of the sleeve with respect to the mandrel, and an annular groove on the interior of the sleeve located adjacent to the axially extending groove in the retainer, spheres located in the groove on the retainer, the spheres extending into the groove in the sleeve whereby relative axial movement between the sleeve and the mandrel is limited.