Patents by Inventor Philip F. Huang

Philip F. Huang 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).

  • Sealing method and apparatus for wellheads
    Patent number: 5325925
    Abstract: A metal-to-metal sealing method and apparatus for use on oil and/or gas wells, utilizes an upper seal member and a lower seal member, wherein the energizing of the seal members is staged to cause the lower seal member to become sealingly engaged. before the upper seal member becomes sealingly engaged. The seal members may have two seals of different construction; one seal is an interference type seal, and the other seal is a wedge type seal.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: July 5, 1994
    Assignee: Ingram Cactus Company
    Inventors: Jerry D. Smith, Philip F. Huang