Patents by Inventor Francis D. Doherty

Francis D. Doherty 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).

  • Extending the coverage of VSP/CDP imaging by using first-order downgoing multiples
    Patent number: 8547794
    Abstract: First-order free-surface multiples recorded in VSP data or reverse VSP data are processed using VSP/CDP method to produce an image of the subsurface. This image produces a larger coverage than that obtained in 3-C 3-D processing of reflection data acquired in the VSP.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: October 1, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Jitendra S. Gulati, Xiaomin Zhao, Francis D. Doherty, Min Lou
  • Vector migration of virtual source VSP data
    Patent number: 8395967
    Abstract: A walkaway VSP survey is carried out with receivers located in a borehole under a salt overhang. Redatuming of the multicomponent data to virtual sources in the borehole followed by vector Kirchhoff migration using a simple velocity model provides an accurate image of the salt face.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: March 12, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Min Lou, Francis D. Doherty, James C. Jackson
  • Extending the Coverage of VSP/CDP Imaging by Using First-Order Downgoing Multiples
    Publication number: 20100271903
    Abstract: First-order free-surface multiples recorded in VSP data or reverse VSP data are processed using VSP/CDP method to produce an image of the subsurface. This image produces a larger coverage than that obtained in 3-C 3-D processing of reflection data acquired in the VSP.
    Type: Application
    Filed: April 8, 2010
    Publication date: October 28, 2010
    Applicant: Baker Hughes Incorporated
    Inventors: Jitendra S. Gulati, Xiaomin Zhao, Francis D. Doherty, Min Lou
  • Vector migration of 1st order free-surface related downgoing multiples from VSP data
    Patent number: 7693006
    Abstract: 1st order free-surface multiples recorded in VSP data or reverse VSP data are processed using a 3-C 3-D vector migration method to produce an image of the subsurface. This image produces a larger coverage than that obtained in 3-C 3-D processing of reflection data acquired in the VSP.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: April 6, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Min Lou, Xiaomin Zhao, Francis D. Doherty, James C. Jackson
  • Vector Migration of Virtual Source VSP Data
    Publication number: 20090310443
    Abstract: A walkaway VSP survey is carried out with receivers located in a borehole under a salt overhang. Redatuming of the multicomponent data to virtual sources in the borehole followed by vector Kirchhoff migration using a simple velocity model provides an accurate image of the salt face.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 17, 2009
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Min Lou, Francis D. Doherty, James C. Jackson
  • Vector Migration of 1st Order Free-Surface Related Downgoing Multiples from VSP Data
    Publication number: 20090122646
    Abstract: 1st order free-surface multiples recorded in VSP data or reverse VSP data are processed using a 3-C 3-D vector migration method to produce an image of the subsurface. This image produces a larger coverage than that obtained in 3-C 3-D processing of reflection data acquired in the VSP.
    Type: Application
    Filed: January 15, 2009
    Publication date: May 14, 2009
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Min Lou, Xiaomin Zhao, Francis D. Doherty, James C. Jackson
  • Vector migration of 1st order free-surface related downgoing multiples from VSP data
    Patent number: 7508736
    Abstract: 1storder free-surface multiples recorded in VSP data or reverse VSP data are processed using a 3-C 3-D vector migration method to produce an image of the subsurface. This image produces a larger coverage than that obtained in 3-C 3-D processing of reflection data acquired in the VSP.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: March 24, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Min Lou, Xiaomin Zhao, Francis D. Doherty, James C. Jackson
  • Vector Migration of 1st Order Free-Surface Related Downgoing Multiples from VSP Data
    Publication number: 20080221796
    Abstract: 1st order free-surface multiples recorded in VSP data or reverse VSP data are processed using a 3-C 3-D vector migration method to produce an image of the subsurface. This image produces a larger coverage than that obtained in 3-C 3-D processing of reflection data acquired in the VSP.
    Type: Application
    Filed: March 9, 2007
    Publication date: September 11, 2008
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Min Lou, Xiaomin Zhao, Francis D. Doherty, James C. Jackson
  • Seismic analysis using electrical submersible pump
    Patent number: 7308362
    Abstract: Seismic data is collected by using an electrical submersible pump assembly in a well that is producing well fluid. By sweeping the rotational speed of the pump assembly through a selected range at selected intervals, seismic waves of varying frequency are emitted. These seismic waves are then picked up with a seismic sensor located at the surface or located in another well. If the seismic sensors are located in another well, the signal from the sensor may be transmitted to the surface by superimposing the data onto the power cable leading to the pump located in that other well. The seismic survey may be repeated at regular intervals, and the results will reveal the changes that have taken place over time in the reservoir.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: December 11, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: Robert H. McCoy, Francis D. Doherty, James C. Jackson