Patents by Inventor Philippe Majewski

Philippe Majewski 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).

  • Patent number: 4884633
    Abstract: The bleeder comprises a hydraulically remotely controlled bleed valve (150) and device for guaranteeing that during bleeding, the gas is exhausted away from the well head zone. The bleed valve (150) is advantageously situated at the top end of the pressure lock and has a valve body (9) defining a main channel (17) of sufficient cross-section to pass to wireline tool. The bleed valve also has a gas exhaust lateral orifice (16) for being put selectively into communication with a first transverse channel (15) which opens out into the main channel (17) by a closure member constituted by a valve seat and a valve member formed at one end of a piston (5). A second transverse channel (14) puts the main channel (17) into communication with a rear face of the piston (5), where the rear face has a greater section than its valve-forming front face.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: December 5, 1989
    Assignee: Gaz de France
    Inventors: Jean-Yves Le Gac, Denis Devilleger, Philippe Majewski