Patents Assigned to Varco I/P/ Inc.
  • Pressure regulated slip ram on a coil tubing blowout preventer
    Patent number: 6843463
    Abstract: A blowout preventer for coiled tubing includes a pressure regulator for a slip ram so that the coiled tubing can be held firmly without exceeding the yield strength of the coiled tubing material and without damaging the coiled tubing.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: January 18, 2005
    Assignee: Varco I/P/ Inc.
    Inventors: David J. McWhorter, Perry Lee McClanahan