Patents by Inventor Raymond E. Johnston

Raymond E. Johnston 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).

  • SYSTEMS AND METHODS FOR WELL CONTROL USING PRESSURE PREDICTION
    Publication number: 20180216428
    Abstract: Disclosed are systems and methods for predicting a stabilized pressure in a wellbore of a well after an undesired influx of formation fluids, i.e., a kick, into the wellbore in a real-time drilling operation. Following the kick, the well is shut in. Signals representing pressure data associated with the subterranean casing, drill pipe, wellhead, and/or the bottomhole assembly and associated time data are received in a processor. A regression analysis is performed using the pressure data and associated time data in the processor and solved for a predicted stabilized pressure associated with the subterranean casing, the drill pipe, the wellhead, and/or the bottomhole assembly respectively. The regression analysis is performed around a variant of the radial diffusivity equation describing the rate-pressure relationship for flow of a production fluid. The predicted stabilized pressure is communicated to a user.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 2, 2018
    Inventors: Charles G. Sinn, Raymond E. Johnston, John Greve, Steven J. Shipula, Joseph D. Cavataio, Vincent Gerard Patin, David Lynn Rodrick
  • Systems and methods for well control using pressure prediction
    Patent number: 10036219
    Abstract: Disclosed are systems and methods for predicting a stabilized pressure in a wellbore of a well after an undesired influx of formation fluids, i.e., a kick, into the wellbore in a real-time drilling operation. Following the kick, the well is shut in. Signals representing pressure data associated with the subterranean casing, drill pipe, wellhead, and/or the bottomhole assembly and associated time data are received in a processor. A regression analysis is performed using the pressure data and associated time data in the processor and solved for a predicted stabilized pressure associated with the subterranean casing, the drill pipe, the wellhead, and/or the bottomhole assembly respectively. The regression analysis is performed around a variant of the radial diffusivity equation describing the rate-pressure relationship for flow of a production fluid. The predicted stabilized pressure is communicated to a user.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: July 31, 2018
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Charles G. Sinn, Raymond E. Johnston, John Greve, Steven J. Shipula, Joseph D. Cavataio, Vincent Gerard Patin, David Lynn Rodrick