Patents by Inventor Delbert L. Head

Delbert L. Head 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).

  • Slimhole coring system
    Patent number: 5425428
    Abstract: An apparatus and method for transporting a tool through a drill string in slimhole drilling operations is disclosed. A fluid passage such as a groove is formed in the inner wall of the pipe joint to permit the passage of fluid from one pipe section to an adjacent pipe section as a tool is transported through the pipe joint. In one embodiment of the invention, the tool can comprise a core barrel for retrieving a core sample from the wellbore.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: June 20, 1995
    Assignee: Fugro-McClelland Marine Geosciences, Inc.
    Inventors: John C. Chatagnier, Jr., Delbert L. Head