Patents by Inventor Sergey Efremov

Sergey Efremov 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 of calibrating multi-channel nuclear energy spectra
    Patent number: 7446308
    Abstract: Measurements made with a nuclear logging tool are partitioned into bins to provide an energy spectrum. The energy spectrum is calibrated by maximizing a measure of similarity with a reference spectrum.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: November 4, 2008
    Assignee: Baker Hughes Incorporated
    Inventors: W. Allen Gilchrist, Sergey Efremov
  • Method of calibrating multi-channel nuclear energy spectra
    Publication number: 20070145259
    Abstract: Measurements made with a nuclear logging tool are partitioned into bins to provide an energy spectrum. The energy spectrum is calibrated by maximizing a measure of similarity with a reference spectrum.
    Type: Application
    Filed: December 22, 2005
    Publication date: June 28, 2007
    Inventors: W. Gilchrist, Sergey Efremov
  • Measurement-while-drilling assembly using real-time toolface oriented measurements
    Publication number: 20060149477
    Abstract: This invention provides a measurement-while-drilling (MWD) downhole assembly for use in drilling boreholes which utilizes directional formation evaluation devices on a rotating assembly in conjunction with toolface orientation sensors. The data from the toolface orientation sensors are analyzed by a processor and toolface angle measurements are determined at defined intervals. Formation evaluation sensors operate substantially independently of the toolface orientation sensors and measurements of the formation evaluation sensors are analyzed in combination with the determined toolface angle to obtain formation parameters.
    Type: Application
    Filed: December 29, 2005
    Publication date: July 6, 2006
    Applicant: Baker Hughes Incorporated
    Inventors: Paul Cairns, Sergey Efremov, David Schneider, Sassan Dehlavi, Robert Estes, Samuel Bell