Patents Assigned to G. B. Tubulars, Inc.
  • Threaded coupling with water exclusion seal system
    Patent number: 6550822
    Abstract: An improved coupling for joining together tubular sections is disclosed. The coupling includes a water exclusion seal which is a pressure energized elastomeric seal positioned in a groove near each end of the coupling to form a radial seal between the unthreaded area at each end of the coupling and the unthreaded cylindrical area adjacent each end of the tubular section. A thread compound relief groove adjacent each seal groove has sufficient volume for thread compound that is squeezed from the threads during or after make-up.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: April 22, 2003
    Assignees: G. B. Tubulars, Inc., Shell Oil Company
    Inventors: Eugene J. Mannella, James L. Peterson