Patents by Inventor David Chace
David Chace 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: 11906690Abstract: In an embodiment, a method includes receiving a first measurement of gamma rays via a detector during a first period of time, receiving a second measurement of gamma rays via the detector during a second period of time, removing the second measurement from the first measurement to produce an inelastic spectrum, determining a spectral slope from the inelastic spectrum, determining a scaling factor based on the spectral slope, determining a spectral shape associated with the detector, determining a detector-induced spectrum by applying the scaling factor to the spectral shape, and removing the detector-induced spectrum from the inelastic spectrum to produce a clean inelastic spectrum.Type: GrantFiled: October 9, 2019Date of Patent: February 20, 2024Assignee: BAKER HUGHES OILFIELD OPERATIONS LLCInventors: Feyzi Inanc, Toyli Anniyev, Peng Yuan, Maxim Vasilyev, David Chace
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Publication number: 20200116891Abstract: In an embodiment, a method includes receiving a first measurement of gamma rays via a detector during a first period of time, receiving a second measurement of gamma rays via the detector during a second period of time, removing the second measurement from the first measurement to produce an inelastic spectrum, determining a spectral slope from the inelastic spectrum, determining a scaling factor based on the spectral slope, determining a spectral shape associated with the detector, determining a detector-induced spectrum by applying the scaling factor to the spectral shape, and removing the detector-induced spectrum from the inelastic spectrum to produce a clean inelastic spectrum.Type: ApplicationFiled: October 9, 2019Publication date: April 16, 2020Applicant: Baker Hughes Oilfield Operations LLCInventors: Feyzi Inanc, Toyli Anniyev, Peng Yuan, Maxim Vasilyev, David Chace
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Patent number: 10585209Abstract: Methods and apparatus for estimating parameters of interest of a volume in an earth formation from a response spectrum representing radiation information obtained by a radiation detector in a borehole intersecting the volume responsive to nuclear phenomena in the volume, the response spectrum including spectral distortion resulting i) environmental conditions in the formation, or ii) deterioration of at least one component of the radiation detector. Methods include recovering an enhanced response spectrum estimating the true spectrum, comprising mitigating the spectral distortion by applying at least one contrast sharpening mask to the response spectrum. The at least one contrast sharpening mask may comprise at least a low pass smoothing mask subtracted from a unity mask which when applied to the response spectrum obtains high-frequency data and adds the high-frequency data to the response spectrum. The response spectrum may be a gamma ray spectrum.Type: GrantFiled: September 17, 2018Date of Patent: March 10, 2020Assignee: BAKER HUGHES, A GE COMPANY, LLCInventors: Feyzi Inanc, Toyli Anniyev, Maxim Vasilyev, David Chace
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Publication number: 20190086576Abstract: Methods and apparatus for estimating parameters of interest of a volume in an earth formation from a response spectrum representing radiation information obtained by a radiation detector in a borehole intersecting the volume responsive to nuclear phenomena in the volume, the response spectrum including spectral distortion resulting i) environmental conditions in the formation, or ii) deterioration of at least one component of the radiation detector. Methods include recovering an enhanced response spectrum estimating the true spectrum, comprising mitigating the spectral distortion by applying at least one contrast sharpening mask to the response spectrum. The at least one contrast sharpening mask may comprise at least a low pass smoothing mask subtracted from a unity mask which when applied to the response spectrum obtains high-frequency data and adds the high-frequency data to the response spectrum. The response spectrum may be a gamma ray spectrum.Type: ApplicationFiled: September 17, 2018Publication date: March 21, 2019Applicant: Baker Hughes, a GE company, LLCInventors: Feyzi Inanc, Toyli Anniyev, Maxim Vasilyev, David Chace
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Publication number: 20170192122Abstract: A method of identifying barite in a subterranean annulus that surrounds a wellbore, where the method includes detecting gamma rays in the wellbore that are generated from the annulus, obtaining a count rate of the detected gamma rays, comparing the count rate with reference data, and determining the presence of barite in the wellbore based on the comparison. The count rate can be a ratio of counts of detected gamma rays obtained from spaced apart receivers on a downhole tool, or a ratio of detected inelastic and capture gamma rays. The reference data is obtained by using a simulation algorithm.Type: ApplicationFiled: January 6, 2016Publication date: July 6, 2017Inventors: Sandeep Gade, Qiong Zhang, David Chace, Feyzi Inanc, Otto N. Fanini, Yonghwee Kim
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Patent number: 9696454Abstract: A method of identifying barite in a subterranean annulus that surrounds a wellbore, where the method includes detecting gamma rays in the wellbore that are generated from the annulus, obtaining a count rate of the detected gamma rays, comparing the count rate with reference data, and determining the presence of barite in the wellbore based on the comparison. The count rate can be a ratio of counts of detected gamma rays obtained from spaced apart receivers on a downhole tool, or a ratio of detected inelastic and capture gamma rays. The reference data is obtained by using a simulation algorithm.Type: GrantFiled: January 6, 2016Date of Patent: July 4, 2017Assignee: Baker Hughes IncorporatedInventors: Sandeep Gade, Qiong Zhang, David Chace, Feyzi Inanc, Otto N. Fanini, Yonghwee Kim
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Patent number: 7554081Abstract: Measurements made with a pulsed neutron source and three or more gamma ray detectors are used to estimate the silicon and oxygen content of earth formations.Type: GrantFiled: April 12, 2007Date of Patent: June 30, 2009Assignee: Baker Hughes IncorporatedInventors: Stephen Riley, David Chace, Darryl E. Trcka
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Publication number: 20080251710Abstract: Measurements made with a pulsed neutron source and three or more gamma ray detectors are used to estimate the silicon and oxygen content of earth formations.Type: ApplicationFiled: April 12, 2007Publication date: October 16, 2008Applicant: BAKER HUGHES INCORPORATEDInventors: Stephen Riley, David Chace, Darryl E. Trcka
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Publication number: 20070023625Abstract: A pulsed neutron tool with three or more detectors is used for making measurements inside casing. The measurements may be used to determine gas saturation at a constant gas pressure, pressure at constant gas saturation, or to determine both gas saturation and gas pressure.Type: ApplicationFiled: July 26, 2005Publication date: February 1, 2007Inventors: Darryl Trcka, Pingjun Guo, Steve Riley, Joseph Barolak, David Chace
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Publication number: 20050284627Abstract: A pulsed neutron source irradiates an earth formation. The irradiation produces N16 from O16 in a fluid in the borehole, and the gamma rays produced by the subsequent decay of N16 are detected by a plurality of spaced apart detectors. The count rates of the detectors are accumulated over a time sampling interval to produce temporal signals. Processing of the temporal signals using correlation, differentiation and/or semblance techniques is used for determination of the flow velocity of one or more fluids in the borehole.Type: ApplicationFiled: June 22, 2005Publication date: December 29, 2005Inventors: Stephen Riley, Benoit Guivarch, Darryl Trcka, David Chace
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Publication number: 20050284626Abstract: A pulsed neutron source irradiates an earth formation. The irradiation produces N16 from O16 in a fluid in the borehole, and the gamma rays produced by the subsequent decay of N16 are detected by a plurality of spaced apart detectors. The count rates of the detectors are accumulated over a time sampling interval to produce temporal signals. Processing of the temporal signals using correlation, differentiation and/or semblance techniques is used for determination of the flow velocity of one or more fluids in the borehole.Type: ApplicationFiled: June 29, 2004Publication date: December 29, 2005Inventors: Stephen Riley, Benoit Guivarch, Darryl Trcka, David Chace
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Patent number: 6601461Abstract: A compensated flow measuring system for measuring a multi-phase fluid flow in a well. An impeller intercepts a downhole multi-phase flow. Capacitance and conductivity sensors are mounted in close proximity to the impeller and provide a measure of electrical admittance of the fluid. In one embodiment, the capacitance and conductivity sensors are mounted in at least one single probe mounted near the impeller. An electronics system contains a phase detector for separating the capacitive and conductive signals and providing a signal related to a compensated multiphase flow rate.Type: GrantFiled: July 16, 2001Date of Patent: August 5, 2003Assignee: Baker Hughes IncorporatedInventors: Jorge O. Maxit, David Chace, Jianrong Wang, Daniel Georgi
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Publication number: 20030010135Abstract: A compensated flow measuring system for measuring a multi-phase fluid flow in a well. An impeller intercepts a downhole multi-phase flow. Capacitance and conductivity sensors are mounted in close proximity to the impeller and provide a measure of electrical admittance of the fluid. In one embodiment, the capacitance and conductivity sensors are mounted in at least one single probe mounted near the impeller. An electronics system contains a phase detector for separating the capacitive and conductive signals and providing a signal related to a compensated multiphase flow rate.Type: ApplicationFiled: July 16, 2001Publication date: January 16, 2003Inventors: Jorge O. Maxit, David Chace, Jianrong Wang, Daniel Georgi
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Patent number: 4938193Abstract: A fuel injection nozzle 10 having a nozzle body 12 to which is attached a banjo-type inlet stud 16, by means of heat shrinking. After the shrink fit attachment, a blind passage 20, 22 in the delivery tube portion 134 of the inlet is drilled through to penetrate the nozzle body and form a leak-tight fuel delivery path. A locating plate 106 is supported by a bore 96 in the cylinder head 80 adjacent the nozzle and orients the nozzle into a preselected orientation. In one nozzle embodiment 70, the tip 76 is sealed against the cylinder head socket 84 by a frustoconical copper annular seal member 82 that is preferentially loaded toward the inner seal diameter. The nozzle cap 14 forms a spring chamber in which a spring subassembly 42 including upper and lower spring seats 48, 46, a spring 44, and stem 186 and pedestal 84 piloting the spring, cooperate to permit independent setting of the valve lift off stop limit F and the spring preload B.Type: GrantFiled: September 9, 1988Date of Patent: July 3, 1990Assignee: Stanadyne Automotive Corp.Inventors: Robert Raufeisen, David A. Chace, Leon P. Janik
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Patent number: 4894900Abstract: A fuel injection nozzle 10 having a nozzle body 12 to which is attached a banjo-type inlet stud 16, by means of heat shrinking. After the shrink fit attachment, a blind passage 20, 22 in the delivery tube portion 134 of the inlet is drilled through to penetrate the nozzle body and form a leak-tight fuel delivery path. A locating plate 106 is supported by a bore 96 in the cylinder head 80 adjacent the nozzle and orients the nozzle into a preselected orientation. In one nozzle embodiment 70, the tip 76 is sealed against the cylinder head socket 84 by a frustoconical copper annular seal member 82 that is preferentially loaded toward the inner seal diameter. The nozzle cap 14 forms a spring chamber in which a spring subassembly 42 including upper and lower spring seats 48, 46, a spring 44, and stem 186 and pedestal 84 piloting the spring, cooperate to permit independent setting of the valve lift off stop limit F and the spring preload B.Type: GrantFiled: September 9, 1988Date of Patent: January 23, 1990Assignee: Stanadyne Automotive Corp.Inventors: Robert Rausfeisen, David A. Chace, Leon P. Janik
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Patent number: 4790055Abstract: A fuel injection nozzle 10 having a nozzle body 12 to which is attached a banjo-type inlet stud 16, by means of heat shrinking. After the shrink fit attachment, a blind passage 20, 22 in the delivery tube portion 134 of the inlet is drilled through to penetrate the nozzle body and form a lead-tight fuel delivery path. A locating plate 106 is supported by a bore 96 in the cylinder head 80 adjacent the nozzle and orients the nozzle into a preselected orientation. In one nozzle embodiment 70, the tip 76 is sealed against the cylinder head socket 84 by a frustoconical copper annular seal member 82 that is preferentially loaded toward the inner seal diameter. The nozzle cap 14 forms a spring chamber in which a spring subassembly 42 including upper and lower spring seats 48, 46, a spring 44, and stem 186 and pedestal 84 piloting the spring, cooperate to permit independent setting of the valve lift off stop limit F and the spring preload B.Type: GrantFiled: June 15, 1987Date of Patent: December 13, 1988Assignee: Stanadyne, Inc.Inventors: Robert Raufeisen, David A. Chace, Leon P. Janik
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Patent number: D469338Type: GrantFiled: November 13, 2001Date of Patent: January 28, 2003Inventor: David A. Chace