Patents by Inventor Pengyu Shi

Pengyu Shi 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).

  • Digital signal receiver for measurement while drilling system having noise cancellation
    Patent number: 6741185
    Abstract: A method is disclosed for reducing noise in a measured telemetry signal. The method includes tracking a characteristic of at least one harmonic of a noise component in the measured telemetry signal band. The at least one harmonic has a frequency outside a telemetry signal band. The characteristic of the noise component is determined for at least one other harmonic thereof. The at least one other harmonic has a frequency inside the telemetry signal band. A noise reference is generated from the characteristic of the in band harmonic, and the noise reference is combined with the measured telemetry signal to generate a noise-canceled telemetry signal.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: May 25, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Pengyu Shi, David Brady, Robert Tennent, Sandra D. Reyes
  • Digital signal receiver for measurement while drilling system having noise cancellation
    Publication number: 20020180613
    Abstract: A method is disclosed for reducing noise in a measured telemetry signal. The method includes tracking a characteristic of at least one harmonic of a noise component in the measured telemetry signal band. The at least one harmonic has a frequency outside a telemetry signal band. The characteristic of the noise component is determined for at least one other harmonic thereof. The at least one other harmonic has a frequency inside the telemetry signal band. A noise reference is generated from the characteristic of the in band harmonic, and the noise reference is combined with the measured telemetry signal to generate a noise-canceled telemetry signal.
    Type: Application
    Filed: November 13, 2001
    Publication date: December 5, 2002
    Inventors: Pengyu Shi, David Brady, Robert Tennent