Patents by Inventor Eric B. Phelps

Eric B. Phelps 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).

  • Transient temperature compensation for pressure gauges using an impulse response for gauge calibration
    Patent number: 5307682
    Abstract: Disclosed is a system wherein the compensation for temperature effects on a pressure measurement gauge are accomplished by processing the raw pressure measurement signal from the gauge through an equation to produce a thermally compensated measurement. The equation expresses the thermally compensated pressure determination as a relation between a derivative of temperature and temperature. When the gauge is placed in an oil or gas well, the equation is used to obtain the corrected measured pressure from the raw measured pressure received from the gauge and the temperature measured adjacent to the gauge.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: May 3, 1994
    Assignee: Marathon Oil Company
    Inventors: Eric B. Phelps, Gary R. Cook, Wayne O. Roszelle
  • Transient temperature compensation for pressure gauges
    Patent number: 5307683
    Abstract: Disclosed is a system wherein the compensation for temperature effects on a pressure measurement gauge are accomplished by processing the raw pressure measurement signal from the gauge through a linear differential equation to produce a thermally compensated measurement. The linear differential equation expresses the thermally compensated pressure determination as a relation between a derivative of temperature and a derivative of pressure error. The linear differential equation contains several coefficients having constant values, and these constant values are computed by calibrating the pressure gauge in a pressure tank having a known pressure and temperature. When the gauge is later placed in an oil or gas well, the coefficient values are used to obtain the corrected measured pressure from the raw measured pressure received from the gauge.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: May 3, 1994
    Assignee: Marathon Oil Company
    Inventors: Eric B. Phelps, Gary R. Cook, Wayne O. Roszelle
  • Transient temperature compensation for pressure gauges using discrete temperature history measurements for gauge calibration
    Patent number: 5307681
    Abstract: Disclosed is a system wherein the compensation for temperature effects on a pressure measurement gauge are accomplished by processing the raw pressure measurement signal from the gauge through an equation to produce a thermally compensated measurement. The equation expresses the thermally compensated pressure determination as a relation between a derivative of temperature and temperature. When the gauge is placed in an oil or gas well, the equation is used to obtain a correction for the measured pressure from the temperature measured adjacent to the pressure gauge.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: May 3, 1994
    Assignee: Marathon Oil Company
    Inventors: Eric B. Phelps, Gary R. Cook, Wayne O. Roszelle