Patents by Inventor Laurent Demanet
Laurent Demanet 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).
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Patent number: 11307324Abstract: Drilling systems and related methods are disclosed. A drilling systems may include a tool configured to be positioned at an end of a drill string adjacent a drill bit, and the tool may be configured to detect localized seismo-electromagnetic conversion from one or more predetermined positions within a medium ahead of the drill bit. The tool may include two or more pressure sources configured to generate focused acoustic and/or elastic energy at the one or more predetermined positions to generate the localized seismo-electric conversion.Type: GrantFiled: March 21, 2019Date of Patent: April 19, 2022Assignee: Massachusetts Institute of TechnologyInventors: Niels Grobbe, Aime Fournier, Laurent Demanet
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Patent number: 11085293Abstract: Drilling systems and related methods are disclosed. A drilling system may include a drill bit positioned at an end of a drill string, and one or more sources and receivers positioned on the drill string behind the drill bit. The sources may be configured to emit signals into a medium surrounding a borehole in which the drill string extends, and the signals may cause a response in the medium at one or more predetermined positions ahead of the drill bit, and response signals may be measured by the one or more receivers. A processor may use the measured response signals to iteratively update an estimate of a property of the medium at the predetermined position, which in some embodiments, may be done using a sequential estimation process, as the drill string is advanced into the medium.Type: GrantFiled: October 7, 2019Date of Patent: August 10, 2021Assignee: Massachusetts Institute of TechnologyInventors: Aime Fournier, Pawan Bharadwaj Pisupati, Laurent Demanet
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Patent number: 10979254Abstract: Systems and methods for performing focused blind deconvolution of signals received by a plurality of sensors are disclosed. In some embodiments, this may include determining a cross-correlation of first and second signals, obtaining a cross-correlation of a first response function and a second response function based on the cross-correlation of the first and second signals and subject to a first constraint that the first and second response functions are maximally white, and obtaining the first and second response functions based on the cross-correlation of the first and second response functions and subject to a second constraint that the first and second response functions are maximally front-loaded.Type: GrantFiled: March 12, 2020Date of Patent: April 13, 2021Assignee: Massachusetts Institute of TechnologyInventors: Pawan Bharadwaj Pisupati, Laurent Demanet, Aime Fournier
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Publication number: 20200386097Abstract: Drilling systems and related methods are disclosed. A drilling system may include a drill bit positioned at an end of a drill string, and one or more sources and receivers positioned on the drill string behind the drill bit. The sources may be configured to emit signals into a medium surrounding a borehole in which the drill string extends, and the signals may cause a response in the medium at one or more predetermined positions ahead of the drill bit, and response signals may be measured by the one or more receivers. A processor may use the measured response signals to iteratively update an estimate of a property of the medium at the predetermined position, which in some embodiments, may be done using a sequential estimation process, as the drill string is advanced into the medium.Type: ApplicationFiled: October 7, 2019Publication date: December 10, 2020Applicant: Massachusetts Institute of TechnologyInventors: Aime Fournier, Pawan Bharadwaj Pisupati, Laurent Demanet
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Publication number: 20200213164Abstract: Systems and methods for performing focused blind deconvolution of signals received by a plurality of sensors are disclosed. In some embodiments, this may include determining a cross-correlation of first and second signals, obtaining a cross-correlation of a first response function and a second response function based on the cross-correlation of the first and second signals and subject to a first constraint that the first and second response functions are maximally white, and obtaining the first and second response functions based on the cross-correlation of the first and second response functions and subject to a second constraint that the first and second response functions are maximally front-loaded.Type: ApplicationFiled: March 12, 2020Publication date: July 2, 2020Applicant: Massachusetts Institute of TechnologyInventors: Pawan Bharadwaj Pisupati, Laurent Demanet, Aime Fournier
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Patent number: 10616008Abstract: Systems and methods for performing focused blind deconvolution of signals received by a plurality of sensors are disclosed. In some embodiments, this may include determining a cross-correlation of first and second signals, obtaining a cross-correlation of a first response function and a second response function based on the cross-correlation of the first and second signals and subject to a first constraint that the first and second response functions are maximally white, and obtaining the first and second response functions based on the cross-correlation of the first and second response functions and subject to a second constraint that the first and second response functions are maximally front-loaded.Type: GrantFiled: May 9, 2019Date of Patent: April 7, 2020Assignee: Massachusetts Institute of TechnologyInventors: Pawan Bharadwaj Pisupati, Laurent Demanet, Aime Fournier
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Publication number: 20190349223Abstract: Systems and methods for performing focused blind deconvolution of signals received by a plurality of sensors are disclosed. In some embodiments, this may include determining a cross-correlation of first and second signals, obtaining a cross-correlation of a first response function and a second response function based on the cross-correlation of the first and second signals and subject to a first constraint that the first and second response functions are maximally white, and obtaining the first and second response functions based on the cross-correlation of the first and second response functions and subject to a second constraint that the first and second response functions are maximally front-loaded.Type: ApplicationFiled: May 9, 2019Publication date: November 14, 2019Applicant: Massachusetts Institute of TechnologyInventors: Pawan Bharadwaj Pisupati, Laurent Demanet, Aime Fournier
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Publication number: 20190293832Abstract: Drilling systems and related methods are disclosed. A drilling systems may include a tool configured to be positioned at an end of a drill string adjacent a drill bit, and the tool may be configured to detect localized seismo-electromagnetic conversion from one or more predetermined positions within a medium ahead of the drill bit. The tool may include two or more pressure sources configured to generate focused acoustic and/or elastic energy at the one or more predetermined positions to generate the localized seismo-electric conversion.Type: ApplicationFiled: March 21, 2019Publication date: September 26, 2019Applicant: Massachusetts Institute of TechnologyInventors: Niels Grobbe, Aime Fournier, Laurent Demanet
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Patent number: 7840625Abstract: Fast digital implementations of the second generation curvelet transform for use in data processing are disclosed. One such digital transformation is based on unequally-spaced fast Fourier transforms (USFFT) while another is based on the wrapping of specially selected Fourier samples. Both digital transformations return a table of digital curvelet coefficients indexed by a scale parameter, an orientation parameter, and a spatial location parameter. Both implementations are fast in the sense that they run in about O(n2 log n) flops for n by n Cartesian arrays or about O(N log N) flops for Cartesian arrays of size N=n3; in addition, they are also invertible, with rapid inversion algorithms of about the same complexity.Type: GrantFiled: April 7, 2006Date of Patent: November 23, 2010Assignees: California Institute of Technology, Stanford UniversityInventors: Emmanuel Candes, David Donoho, Laurent Demanet
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Publication number: 20070038691Abstract: Fast digital implementations of the second generation curvelet transform for use in data processing are disclosed. One such digital transformation is based on unequally-spaced fast Fourier transforms (USFFT) while another is based on the wrapping of specially selected Fourier samples. Both digital transformations return a table of digital curvelet coefficients indexed by a scale parameter, an orientation parameter, and a spatial location parameter. Both implementations are fast in the sense that they run in about O(n2 log n) flops for n by n Cartesian arrays or about O(N log N) flops for Cartesian arrays of size N=n3; in addition, they are also invertible, with rapid inversion algorithms of about the same complexity.Type: ApplicationFiled: April 7, 2006Publication date: February 15, 2007Inventors: Emmanuel Candes, David Donoho, Laurent Demanet