Patents Assigned to Barold Technology, Inc.
  • Drill bit and other downhole tools having electro-negative surfaces and sacrificial anodes to reduce mud balling
    Patent number: 5330016
    Abstract: Various steel, downhole tools and components of a drill string, including, as examples, a PDC drill bit, a rotary rock bit, a cross-over sub, a stabilizer, a reamer, a hole enlarger and a coring bit, are selectively treated to cause certain of their parts to be electro-negative with respect to steel, and certain other parts to either have the same electro-negativity as steel, or to be treated to be electro-positive with respect to steel.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: July 19, 1994
    Assignee: Barold Technology, Inc.
    Inventors: William C. Paske, Paul F. Rodney, Ronald D. Ormsby