Patents Assigned to FIP, Inc.
  • Wellhead apparatus
    Patent number: 4552213
    Abstract: There are disclosed several alternate embodiments of wellhead apparatus of the type in which hydraulic fluid may be transmitted to and/or from a subsurface safety valve or other hydraulically operable device within the well through an annular space formed between the production tubing.
    Type: Grant
    Filed: March 8, 1984
    Date of Patent: November 12, 1985
    Assignee: FIP, Inc.
    Inventors: Jerry K. Boyd, Yu C. Chang