Patents by Inventor James Rickett

James Rickett 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).

  • Publication number: 20190239457
    Abstract: A system and method for calibrating an irrigation system to account for variations in flow rates caused by field elevation changes, pipe friction losses, water emitter nozzle wear, pressure-regulator inaccuracies, and other factors. A calibration map is created to account for the flow rate variations and then consulted to control operation of the irrigation system.
    Type: Application
    Filed: February 8, 2018
    Publication date: August 8, 2019
    Applicant: LINDSAY CORPORATION
    Inventors: Michael George Ricketts, Brian James Magnusson
  • Patent number: 9244181
    Abstract: A method for processing seismic data. The method includes predicting seismic data according to an earth model representing seismic properties of subterranean formations in the earth, determining a difference between seismic data acquired from one or more seismic receivers and the predicted seismic data, projecting the difference into a model space in traveltime, and updating the earth model according to the projected difference. As a result, the updated earth model more accurately represents the seismic properties of subterranean formations in the earth.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: January 26, 2016
    Assignee: WesternGeco L.L.C.
    Inventors: James Rickett, Paul Childs
  • Patent number: 9158018
    Abstract: Forward modeling is performed to compute a response of a target structure, the forward modeling accounting for distortion of a reflected signal from a reflector in the target structure. Waveform inversion is performed using the response of the forward modeling.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: October 13, 2015
    Assignee: WesternGeco L.L.C.
    Inventors: Rodrigo Fuck, Christopher H. Chapman, James Rickett, Colin Thomson
  • Patent number: 9075163
    Abstract: Implementations of various technologies for a method for generating a seismic image of a subsurface are described herein. Seismic data may be received from two sensors in a seismic survey. The seismic data below and equal to a predetermined frequency may be classified as low-frequency seismic data. The low-frequency seismic data may be re-sampled based on the predetermined frequency. A set of low-frequency Green's functions may be calculated using interferometry on the re-sampled low-frequency seismic data. High-frequency seismic data of the seismic data may be processed to create a set of high-frequency Green's functions at one or more source locations of the seismic survey. The set of high-frequency Green's functions may be merged with the set of low-frequency Green's functions to create a set of broad-band Green's functions. The seismic image may be generated using the set of broad-band Green's functions at the source locations.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: July 7, 2015
    Assignee: WESTERNGECO L.L.C.
    Inventors: Johan O. A. Robertsson, James Rickett
  • Publication number: 20120259601
    Abstract: Forward modeling is performed to compute a response of a target structure, the forward modeling accounting for distortion of a reflected signal from a reflector in the target structure. Waveform inversion is performed using the response of the forward modeling.
    Type: Application
    Filed: December 21, 2011
    Publication date: October 11, 2012
    Inventors: RODRIGO FUCK, Christopher H. Chapman, James Rickett, Colin Thomson
  • Publication number: 20110090760
    Abstract: A method for processing seismic data. The method includes predicting seismic data according to an earth model representing seismic properties of subterranean formations in the earth, determining a difference between seismic data acquired from one or more seismic receivers and the predicted seismic data, projecting the difference into a model space in traveltime, and updating the earth model according to the projected difference. As a result, the updated earth model more accurately represents the seismic properties of subterranean formations in the earth.
    Type: Application
    Filed: October 19, 2009
    Publication date: April 21, 2011
    Inventors: James Rickett, Paul Childs
  • Publication number: 20100265797
    Abstract: Implementations of various technologies for a method for generating a seismic image of a subsurface are described herein. Seismic data may be received from two sensors in a seismic survey. The seismic data below and equal to a predetermined frequency may be classified as low-frequency seismic data. The low-frequency seismic data may be re-sampled based on the predetermined frequency. A set of low-frequency Green's functions may be calculated using interferometry on the re-sampled low-frequency seismic data. High-frequency seismic data of the seismic data may be processed to create a set of high-frequency Green's functions at one or more source locations of the seismic survey. The set of high-frequency Green's functions may be merged with the set of low-frequency Green's functions to create a set of broad-band Green's functions. The seismic image may be generated using the set of broad-band Green's functions at the source locations.
    Type: Application
    Filed: April 17, 2009
    Publication date: October 21, 2010
    Inventors: Johan O. A. Robertsson, James Rickett
  • Patent number: 7769545
    Abstract: A method of determining geological information related to a subsurface volume. In one embodiment, the method comprises obtaining a seismic information related to a subsurface volume; determining a horizon volume that automatically maps the seismic information into a flattened volume, wherein one axis of the flattened volume corresponds to chronostratigraphic time, and wherein horizons represented by the seismic information are automatically accounted for in the horizon volume, and are shifted by the horizon volume into the flattened volume to be substantially planar and substantially perpendicular to the axis of the flattened volume that corresponds to chronostratigraphic time; determining a derivative of the horizon volume with respect to chronostratigraphic time; and determining geological information related to the subsurface volume based on the derivative of the horizon volume with respect to chronostratigraphic time.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: August 3, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventors: Jesse Lomask, James Rickett, Julian Clark
  • Patent number: 7769546
    Abstract: A method of determining a horizon volume. In one embodiment, the horizon volume is determined from obtained seismic information, and maps the obtained seismic information onto a flattened volume such that in the flattened volume, horizons represented in the obtained seismic information are shifted to be substantially coplanar with a surface defined by the horizon volume as an estimate of a single chronostratigraphic time such that the parameters of the flattened volume include (i) a two-dimensional position in a surface plane, and (ii) a metric related to chronostratigraphic time.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: August 3, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventors: Jesse Lomask, James Rickett, Julian Clark
  • Publication number: 20090204331
    Abstract: A method of determining geological information related to a subsurface volume. In one embodiment, the method comprises obtaining a seismic information related to a subsurface volume; determining a horizon volume that automatically maps the seismic information into a flattened volume, wherein one axis of the flattened volume corresponds to chronostratigraphic time, and wherein horizons represented by the seismic information are automatically accounted for in the horizon volume, and are shifted by the horizon volume into the flattened volume to be substantially planar and substantially perpendicular to the axis of the flattened volume that corresponds to chronostratigraphic time; determining a derivative of the horizon volume with respect to chronostratigraphic time; and determining geological information related to the subsurface volume based on the derivative of the horizon volume with respect to chronostratigraphic time.
    Type: Application
    Filed: February 11, 2008
    Publication date: August 13, 2009
    Applicant: Chevron U.S.A. Inc.
    Inventors: Jesse Lomask, James Rickett, Julian Clark
  • Publication number: 20090204332
    Abstract: A method of determining a horizon volume. In one embodiment, the horizon volume is determined from obtained seismic information, and maps the obtained seismic information onto a flattened volume such that in the flattened volume, horizons represented in the obtained seismic information are shifted to be substantially coplanar with a surface defined by the horizon volume as an estimate of a single chronostratigraphic time such that the parameters of the flattened volume include (i) a two-dimensional position in a surface plane, and (ii) a metric related to chronostratigraphic time.
    Type: Application
    Filed: February 11, 2008
    Publication date: August 13, 2009
    Applicant: Chevron U.S.A. Inc.
    Inventors: Jesse Lomask, James Rickett, Julian Clark
  • Publication number: 20060265132
    Abstract: The present invention includes a method for determining interval values of seismic quality factor, Q, from seismic data. Seismic data is recorded and preprocessed as necessary. Estimates of amplitude spectra are determined from the seismic data. Logarithms are taken of the amplitude spectra and weights derived from the amplitude spectra. Interval values of seismic quality factor, Q, are determined by performing a weighted fit to the log-amplitude spectra with a function that is parameterized by an initial wavelet, an attenuation profile (1/Q) and an absolute-scaling profile.
    Type: Application
    Filed: May 12, 2006
    Publication date: November 23, 2006
    Inventor: James Rickett
  • Patent number: 4475208
    Abstract: A wired spread spectrum data communication system includes a modulator and a demodulator coupled to a transmission line having other signals thereon. The modulator includes a pseudo-noise (PN) generator and a clock providing, respectively, a PN code signal and a clock signal for combination in exclusive-OR (XOR) gates with a low bit rate data signal. The demodulator includes a phase locked loop for clock signal recovery and an identical PN generator providing, respectively, a local clock signal and PN code signal for combination in XOR gates with the encoded data signal for the removal of the clock and PN code signal components from the encoded data signal. The demodulator further includes circuitry for synchronizing the local PN code signal with the PN code component of the incoming encoded data signal.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: October 2, 1984
    Inventor: James A. Ricketts