Patents by Inventor Keith Anthony Fritchley

Keith Anthony Fritchley 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).

  • Drillpipe sub
    Patent number: 6834719
    Abstract: A drillpipe sub (30) comprises a shaft (32), a first frustoconical member (34) encircling, and fixedly mounted on, the shaft (32), and a second, opposed frustoconical member (36) encircling, and slidably mounted on, the shaft (32). The first frustoconical member (34) is bonded at its base (38) to the base (40) of the second frustoconical member (36).
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: December 28, 2004
    Assignee: Reeves Wireline Technologies Limited
    Inventors: Keith Anthony Fritchley, Michael Charles Spencer
  • Drillpipe sub
    Publication number: 20030070802
    Abstract: A drillpipe sub (30) comprises a shaft (32), a first frustoconical member (34) encircling, and fixedly mounted on, the shaft (32), and a second, opposed frustoconical member (36) encircling, and slidably mounted on, the shaft (32). The first frustoconical member (34) is bonded at its base (38) to the base (40) of the second frustoconical member (36).
    Type: Application
    Filed: September 16, 2002
    Publication date: April 17, 2003
    Inventors: Keith Anthony Fritchley, Michael Charles Spencer
  • Pumping sub for well logging tools
    Publication number: 20010006107
    Abstract: The pumping sub comprises first and second inflatable bladders which are pressurized to inflate to accommodate various pipe diameters. Pressure relief value means is provided to assist in clearing obstructions within the pipe. The pumping sub acts as a parachute to slow the fall of a logging tool and enables the logging tool to be pumped up and down a drill pipe. FIG.
    Type: Application
    Filed: December 28, 2000
    Publication date: July 5, 2001
    Inventors: Keith Anthony Fritchley, Michael Charles Spencer