Patents by Inventor Casimir J. Fritshe

Casimir J. Fritshe 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 completion system
    Patent number: 5327965
    Abstract: A well completion system utilizes a seal which carries its own load ring. The seal is lowered into the bore of a wellhead housing around a tubular member. The seal carries a split load ring, which once positioned will move outward into engagement with a groove formed in the wellhead housing. A locking assembly will lock the seal to the wellhead housing. The locking assembly has a casing lock ring which will secure to the upper end of a section of casing, if the casing has been cut due to an emergency stuck condition. A tubing hanger lands over the locking assembly. The tubing hanger is retained by an actuating ring and lock ring that are independent of the tubing hanger seal.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: July 12, 1994
    Assignee: ABB Vetco Gray Inc.
    Inventors: Garry R. Stephen, Dale B. Marietta, Norman Brammer, Casimir J. Fritshe, Lawrence A. Eckert, Allan C. Sharp