Patents by Inventor Daniel Gallois

Daniel Gallois 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).

  • Method and apparatus for converting an oil well to a well with effluent raising by gas-lift
    Patent number: 4480697
    Abstract: The present invention relates to a method of and apparatus for converting an oil well with natural effluent rise to one with gas-lift of the effluent column, wherein the oil well has a nipple in the production tube provided with a stop-groove and smooth bearing surfaces between which a hydraulic control line comes out. For conversion an inner tube is lowered inside the production tube, the inner tube being provided with a locking system for locking the inner tube to the nipple, and with a safety valve assembly capable of closing both the passage inside the inner tube and the annular passage between the latter and the production tube, under the action of a control fluid supplied by the control line which opens between two seals on the inner tube and which bear against the smooth bearing surfaces when locking is effected.
    Type: Grant
    Filed: February 23, 1983
    Date of Patent: November 6, 1984
    Assignees: Compagnie Francaise Des Petroles, Slumberger Technology Corporation
    Inventors: Rene F. Goldaniga, Geard Walter, Bernard J. P. Glotin, Daniel Gallois