Patents Assigned to Mitchell Supply, Inc.
  • Inverted working barrel and seat and method of manufacturing the same
    Patent number: 4759407
    Abstract: A thin walled (e.g., 1/16th inch), cylindrical, stainless steel inverted working barrel and seat adapted to concentrically insert into and sleeve upwardly within the lower end of a conventional oil or gas well production string and act as a replacement for or in lieu of a conventional thick walled working barrel. The production string structurally protects the thin walled barrel allowing for a significant savings in initial or replacement costs.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: July 26, 1988
    Assignee: Mitchell Supply, Inc.
    Inventor: Orville R. Ripley