Patents by Inventor Miffre Hubert

Miffre Hubert 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 system for a well bore in which a hot fluid is circulated
    Patent number: 4513816
    Abstract: A sealing system for a tubing string in a well bore which is capable of undergoing deformation under the action of a hot fluid and has at least one casing string in which the tubing is housed, a connecting and sealing assembly placed between the casing and the tubing as well as members for supporting and securing the casing and tubing strings comprises in addition, a hollow seal support, the upper end of which is rigidly fixed and the lower end of which is free to permit displacement of the upper portion of the tubing string with respect to the seal support with the lower portion of the tubing string rigidly fixed to the connecting and sealing assembly located near the bottom of the well bore.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: April 30, 1985
    Assignee: Societe Nationale Elf Aquitaine (Production)
    Inventor: Miffre Hubert