Patents by Inventor Bobby Dewain McDowell

Bobby Dewain McDowell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7341109
    Abstract: A compensator sleeve assembly for use with a hydraulic extension system used to handle safety valves designed to shut off high pressure upward flow through drill pipe or tubing. The compensator sleeve assembly, amounted on an adjustable arm slide, has a steel sleeve for holding the safety valve, an arrangement of circumferentially space-apart spring sets which allow the safety valve to “float” and tilt from the vertical in any direction and a hydraulic-powered chain drive belt for rotating the safety valve.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: March 11, 2008
    Inventor: Bobby Dewain McDowell
  • Patent number: 6488094
    Abstract: An apparatus for handling safety valves used for shutting off high pressure upward flow through drill pipe or tubing. The apparatus includes an adjustable clamp assembly for holding the safety valve; a three-stage double-acting hydraulic extension system to provide horizontal (and optionally, rotational) movement of the safety valve; a telescoping, mechanically-extending stanchion with a stabilizing plate attached to the hydraulic extension system; a stable track assembly for vertical movement of the apparatus; and a positioning arm with a yoke for placement against the drill pipe or tubing, providing a distance measurement used to vertically align the safety valve with the drill pipe or tubing.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: December 3, 2002
    Assignee: DELMC, Inc.
    Inventor: Bobby Dewain McDowell
  • Patent number: 6189620
    Abstract: An apparatus for handling safety valves used for shutting off high pressure upward flow through drill pipe or tubing. The apparatus includes an adjustable clamp assembly for holding the safety valve; a three-stage double-acting hydraulic extension system to provide horizontal (and optionally, rotational) movement of the safety valve; a stable track assembly for vertical movement of the apparatus; and a positioning arm with a yoke for placement against the drill pipe or tubing, providing a distance measurement used to vertically align the safety valve with the drill pipe or tubing.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: February 20, 2001
    Inventor: Bobby Dewain McDowell