Patents by Inventor Ikko Okuda

Ikko Okuda 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).

  • Methods and apparatus for downhole fluids analysis
    Patent number: 6768105
    Abstract: A method of determining GOR comprising subjecting a fluid to spectroscopic analysis at a first wavelength sensitive to gas and a second wavelength sensitive to oil, determining a response matrix for the contribution of gas at the first and second wavelengths and the contribution of oil at the first and second wavelengths, determining a signal response vector and the two wavelengths, calculating a mass fraction vector from the response matrix and the signal response vector and using the mass fraction vector to determine GOR.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: July 27, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Oliver C. Mullins, Toru Terabayashi, Kazuyoshi Kegasawa, Ikko Okuda
  • Methods and apparatus for downhole fluids analysis
    Publication number: 20030062472
    Abstract: A method of determining GOR comprising subjecting a fluid to spectroscopic analysis at a first wavelength sensitive to gas and a second wavelength sensitive to oil, determining a response matrix for the contribution of gas at the first and second wavelengths and the contribution of oil at the first and second wavelengths, determining a signal response vector and the two wavelengths, calculating a mass fraction vector from the response matrix and the signal response vector and using the mass fraction vector to determine GOR.
    Type: Application
    Filed: September 10, 2002
    Publication date: April 3, 2003
    Inventors: Oliver C. Mullins, Toru Terabayashi, Kazuyoshi Kegasawa, Ikko Okuda
  • Methods and apparatus for downhole fluids analysis
    Patent number: 6476384
    Abstract: A method of determining GOR comprising subjecting a fluid to spectroscopic analysis at a first wavelength sensitive to gas and a second wavelength sensitive to oil, determining a response matrix for the contribution of gas at the first and second wavelengths and the contribution of oil at the first and second wavelengths, determining a signal response vector and the two wavelengths, calculating a mass fraction vector from the response matrix and the signal response vector and using the mass fraction vector to determine GOR.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: November 5, 2002
    Assignee: Schlumberger Technology Corporation
    Inventors: Oliver C. Mullins, Toru Terabayashi, Kazuyoshi Kegasawa, Ikko Okuda