Patents by Inventor Denis Hafon

Denis Hafon 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 transmitting information between a salt-cavern and the surface of the ground
    Patent number: 7151465
    Abstract: A method of transmitting information between a salt-cavern and the surface of the ground, the cavern being drilled in geological formation beds and being connected to the surface via an access borehole cased at least in part by metal tubes and presenting at least one safety valve, the method consisting in suspending a string of tools from a hanger system positioned in the access borehole downstream from the safety valve and in electrical contact with the metal tubes, the string of tools including at least one measuring device connected to the hanger system via a first segment of conductor cable and an information transceiver operating by means of waves and connected to the measuring device via a second segment of conductor cable, the transceiver being positioned in such a manner as to be in contact with structural means linked to the cavern; and establishing coupling between the transceiver and the structural means, in order to enable information to be transmitted between the measuring device and the surface
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: December 19, 2006
    Assignees: Gaz de France, Geoservices
    Inventors: Jean-Michel Barbot, Thierry Pichery, Christian Sirieix, Bruno Lebriere, Denis Hafon
  • Method and apparatus for transmitting information between a salt-cavern and the surface of the ground
    Publication number: 20040246140
    Abstract: A method of transmitting information between a salt-cavern and the surface of the ground, the cavern being drilled in geological formation beds and being connected to the surface via an access borehole cased at least in part by metal tubes and presenting at least one safety valve, the method consisting in suspending a string of tools from a hanger system positioned in the access borehole downstream from the safety valve and in electrical contact with the metal tubes, the string of tools including at least one measuring device connected to the hanger system via a first segment of conductor cable and an information transceiver operating by means of waves and connected to the measuring device via a second segment of conductor cable, the transceiver being positioned in such a manner as to be in contact with structural means linked to the cavern; and establishing coupling between the transceiver and the structural means, in order to enable information to be transmitted between the measuring device and the surface
    Type: Application
    Filed: April 26, 2004
    Publication date: December 9, 2004
    Applicant: GAZ DE FRANCE and GEOSERVICES
    Inventors: Jean-Michel Barbot, Thierry Pichery, Christian Sirieix, Bruno Lebriere, Denis Hafon