Patents Assigned to Reusable Wearbands, LLC
  • Patent number: 8397840
    Abstract: A wear band for a well drill pipe which is made up of a coil spring sized to fit at the joint of the well drill pipe or casing. The inner surface of the coil spring includes a textured coating such as a carbide. The outer surface includes a plurality of hydrodynamic dimples defined therein, and preferably both the outer surface and the inner surface are adapted to resist corrosion. The abrasive coating preferably consists essentially of 95% tungsten carbide and a binder of 5% cobalt and coats an amount of the inner surface in the range of 50% to 100%. The hydrodynamic dimples are generally tear drop in shape to act as miniature fluid pumps. As a result, the wear band can be mechanically attached to the drill pipe while eliminating the need for metallurgically-welded hardbands and therefore unaffecting the drill pipe properties and dimensions.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: March 19, 2013
    Assignee: Reusable Wearbands, LLC
    Inventors: Joseph A. Downie, Bruce M. Warnes