Patents by Inventor Jim Lee Wiedemann

Jim Lee Wiedemann 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).

  • Wellhead equipment that use polymer sealing elements to seal off well pressure
    Patent number: 5960876
    Abstract: Wellhead equipment includes a body having a drilling conduit passage, whereby drilling conduit is passed through the body. Polymer sealing elements are disposed within the body and disposed in relation to the passage to seal off well pressure. A circulation passage extends through the body in the vicinity of the polymer sealing elements. The circulation passage has an inlet and an outlet whereby warm fluid is circulated through the circulation passage from the inlet to the outlet thereby raising the temperature of the polymer sealing elements to improve their cold weather performance.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: October 5, 1999
    Assignee: Vanoil Equipment Inc.
    Inventor: Jim Lee Wiedemann