Patents Assigned to Fugro-McClelland Marine Geosciences, Inc.
  • 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