Patents by Inventor Jean P. Seydoux

Jean P. Seydoux 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 measuring resistivity of an earth formation
    Patent number: 6188222
    Abstract: The method and apparatus of the invention determines earth formation resistivity at extended depths into the formation by the use of telemetry transmission signals to measure the formation resistivity. The telemetry transmission signals carry measurement data from downhole sensors through the formation to an uphole receiver. The signal transmission is by means of induction telemetry. At the receiver, the signal is demodulated to obtain the transmitted measurement data. During the detection of the signal at the receiver, the signal amplitude is also extracted and is used to determine the formation resistivity. In addition, changes in the signal amplitude are also used to indicate formation boundaries for determining well location during directional drilling.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: February 13, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: Jean P. Seydoux, Jacques R. Tabanou