Patents by Inventor Douglas Leeth

Douglas Leeth 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).

  • DEFLECTION SWIVEL AND METHOD
    Publication number: 20050211444
    Abstract: A deflectable in-line swivel that permits axial deflection of a tubular string is presented. The in-line swivel is preferably constructed as a ball and socket design whereby the ball of a swivel mandrel is permitted to articulate within a socket of a retainer sub. The system preferably includes a thrust bearing to allow the tensile loads to be carried across the swivel.
    Type: Application
    Filed: March 23, 2004
    Publication date: September 29, 2005
    Inventors: Vernon Kauffman, Douglas Leeth, John Lemke, Max Smith
  • ARTICULATED DRILLSTRING ENTRY APPARATUS AND METHOD
    Publication number: 20050211443
    Abstract: Apparatuses and methods to allow tools disposed upon a conduit to enter the bore of a drillstring is presented. The apparatuses and methods include the use of one or more articulated knuckle joints at ends of an entry sub. The articulated knuckle joints are capable of articulating the entry sub among various conduit entry and load carrying positions.
    Type: Application
    Filed: March 23, 2004
    Publication date: September 29, 2005
    Inventors: Charles Helms, Vernon Kauffman, Douglas Leeth, John Lemke, Max Smith