Patents by Inventor Raj Pai
Raj Pai 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: 10066991Abstract: Systems, tools, and methods are presented for processing a plurality of spectral ranges from an electromagnetic radiation that has been interacted with a fluid. Each spectral range within the plurality corresponds to a property of the fluid or a constituent therein. In one instance, a series of spectral analyzers, each including an integrated computational element coupled to an optical transducer, forms a monolithic structure to receive interacted electromagnetic radiation from the fluid. Each spectral analyzer is configured to process one of the plurality of spectral ranges. The series is ordered so spectral ranges are processed progressively from shortest wavelengths to longest wavelengths as interacted electromagnetic radiation propagates therethrough. Other systems, tools, and methods are presented.Type: GrantFiled: December 31, 2014Date of Patent: September 4, 2018Assignee: HALLIBURTON ENERGY SERVICES, INC.Inventors: Michael T. Pelletier, William J. Soltmann, Raj Pai, James E. Masino, Christopher M. Jones, David L. Perkins, Aditya B. Nayak, James M. Price
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Publication number: 20170328769Abstract: Systems, tools, and methods are disclosed that utilize at least one integrated computational element to measure a property of a substance in close proximity to the substance's source. More specifically, systems, tools, and methods are presented that allow the interaction of electromagnetic radiation and the optically-processing of interacted electromagnetic radiation in proximity to an emergence of a fluid from the fluid's source. The integrated computational elements optically-process the interacted electromagnetic radiation into a weighted optical spectrum. The weighted optical spectrum enables the determination of various chemical or physical characteristics of the fluid.Type: ApplicationFiled: December 31, 2014Publication date: November 16, 2017Applicant: Halliburton Energy Services, Inc.Inventors: Michael T. Pelletier, William J. Soltmann, David L. Perkins, Raj Pai, James E. Masino
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Patent number: 9798039Abstract: In a downhole environment, utilizing one or more ICE modules, in response to detecting light by one or more channels of a light to voltage converter, the detected light is converted into one or more voltages. The light has previously interacted with a downhole substance and has been processed by an integrated computational element. The one or more voltages are converted into one or more analog frequencies. The one or more analog frequencies are converted into one or more digital frequencies. One or more intensities are determined from one or more digital frequencies. One or more components of the substance are determined in response to the determined one or more intensities.Type: GrantFiled: July 9, 2014Date of Patent: October 24, 2017Assignee: Halliburton Energy Services, Inc.Inventors: Michael T. Pelletier, William J. Soltmann, David L. Perkins, Raj Pai, James E. Masino
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Patent number: 9766369Abstract: In some embodiments, apparatus and systems, as well as methods, may operate to select from multiple optical detectors and/or multiple detector amplifiers to form combinations of detectors and amplifiers as part of an optical detection system. The selection may be based on minimizing noise equivalent power (NEP) of the optical detector or a combination of an optical detector and a detector amplifier over a desired temperature range. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: February 25, 2016Date of Patent: September 19, 2017Assignee: Halliburton Energy Services, Inc.Inventors: Raj Pai, Marian Morys, Homi Phiroze Cooper, John Thomas
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Publication number: 20170059406Abstract: Systems, tools, and methods are presented for processing a plurality of spectral ranges from an electromagnetic radiation that has been interacted with a fluid. Each spectral range within the plurality corresponds to a property of the fluid or a constituent therein. In one instance, a series of spectral analyzers, each including an integrated computational element coupled to an optical transducer, forms a monolithic structure to receive interacted electromagnetic radiation from the fluid. Each spectral analyzer is configured to process one of the plurality of spectral ranges. The series is ordered so spectral ranges are processed progressively from shortest wavelengths to longest wavelengths as interacted electromagnetic radiation propagates therethrough. Other systems, tools, and methods are presented.Type: ApplicationFiled: December 31, 2014Publication date: March 2, 2017Applicant: Halliburton Energy Services, Inc.Inventors: Michael T. Pelletier, William J. Soltmann, Raj Pai, James E. Masino, Christopher M. Jones, David L. Perkins, Aditya B. Nayak, James M. Price
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Publication number: 20160202385Abstract: In a downhole environment, utilizing one or more ICE modules, in response to detecting light by one or more channels of a light to voltage converter, the detected light is converted into one or more voltages. The light has previously interacted with a downhole substance and has been processed by an integrated computational element. The one or more voltages are converted into one or more analog frequencies. The one or more analog frequencies are converted into one or more digital frequencies. One or more intensities are determined from one or more digital frequencies. One or more components of the substance are determined in response to the determined one or more intensities.Type: ApplicationFiled: July 9, 2014Publication date: July 14, 2016Applicant: Halliburton Energy Services, Inc.Inventors: Michael T. Pelletier, William J. Soltmann, David L. Perkins, Raj Pai, James E. Masino
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Publication number: 20160170080Abstract: In some embodiments, apparatus and systems, as well as methods, may operate to select from multiple optical detectors and/or multiple detector amplifiers to form combinations of detectors and amplifiers as part of an optical detection system. The selection may be based on minimizing noise equivalent power (NEP) of the optical detector or a combination of an optical detector and a detector amplifier over a desired temperature range. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: February 25, 2016Publication date: June 16, 2016Inventors: Raj Pai, Marian Morys, Homi Phiroze Cooper, John Thomas
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Patent number: 9304227Abstract: Optical detection apparatus (300) comprising an optical detector (302, 304, 306), a detector amplifier (336, 338, 340), and switching means, e.g., a multiplexer (344, 348), for dynamically selecting at least one of the optical detector or the detector amplifier by switching from among at least two alternative optical detectors and/or at least two detector amplifiers such as to minimize noise equivalent power (NEP) of a selected detector or combination of detector and amplifier under given operating conditions.Type: GrantFiled: March 9, 2010Date of Patent: April 5, 2016Assignee: Halliburton Energy Services, Inc.Inventors: Raj Pai, Marian Morys, Homi Phiroze Cooper, John Thomas
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Patent number: 9091151Abstract: Various methods and tools optically analyze downhole fluid properties in situ. Some disclosed downhole optical radiometry tools include a tool body having a sample cell for fluid flow. A light beam passes through the sample cell and a spectral operation unit (SOU) such as a prism, filter, interferometer, or multivariate optical element (MOE). The resulting light provides a signal indicative of one or more properties of the fluid. A sensor configuration using electrically balanced thermopiles offers a high sensitivity over a wide temperature range. Further sensitivity is achieved by modulating the light beam and/or by providing a reference light beam that does not interact with the fluid flow. To provide a wide spectral range, some embodiments include multiple filaments in the light source, each filament having a different emission spectrum. Moreover, some embodiments include a second light source, sample cell, SOU, and detector to provide increased range, flexibility, and reliability.Type: GrantFiled: November 18, 2010Date of Patent: July 28, 2015Assignee: HALLIBURTON ENERGY SERVICES, INC.Inventors: Christopher M. Jones, Stephen A. Zannoni, Michael T. Pelletier, Raj Pai, Wei Zhang, Marian L. Morys, Robert Atkinson
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Patent number: 8946639Abstract: In some embodiments, apparatus and systems, as well as methods, may operate to receive radiation at an active detector of a pair of radiation detectors to provide a first signal proportional to an intensity of the radiation, to receive none of the radiation at a blind detector of the pair of radiation detectors to provide a second signal proportional to the reception of no radiation, and to combine the first signal and the second signal to provide an output signal representing the difference between the first signal and the second signal. The pair of radiation detectors may comprise thermopile detectors. Combination may occur via differential amplification. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: August 7, 2014Date of Patent: February 3, 2015Assignee: Halliburton Energy Services, Inc.Inventors: Raj Pai, Marian Morys, Phap Hung Lien
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Publication number: 20140346324Abstract: In some embodiments, apparatus and systems, as well as methods, may operate to receive radiation at an active detector of a pair of radiation detectors to provide a first signal proportional to an intensity of the radiation, to receive none of the radiation at a blind detector of the pair of radiation detectors to provide a second signal proportional to the reception of no radiation, and to combine the first signal and the second signal to provide an output signal representing the difference between the first signal and the second signal. The pair of radiation detectors may comprise thermopile detectors. Combination may occur via differential amplification. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: August 7, 2014Publication date: November 27, 2014Inventors: Raj Pai, Marian Morys, Phap Hung Lien
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Patent number: 8895928Abstract: In some embodiments, apparatus and systems, as well as methods, may operate to receive radiation at an active detector of a pair of radiation detectors to provide a first signal proportional to an intensity of the radiation, to receive none of the radiation at a blind detector of the pair of radiation detectors to provide a second signal proportional to the reception of no radiation, and to combine the first signal and the second signal to provide an output signal representing the difference between the first signal and the second signal. The pair of radiation detectors may comprise thermopile detectors. Combination may occur via differential amplification. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: February 3, 2011Date of Patent: November 25, 2014Assignee: Halliburton Energy Services, Inc.Inventors: Raj Pai, Marian Morys, Phap Hung Lien
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Publication number: 20130119246Abstract: Optical detection apparatus (300) comprising an optical detector (302, 304, 306), a detector amplifier (336, 338, 340), and switching means, e.g., a multiplexer (344, 348), for dynamically selecting at least one of the optical detector or the detector amplifier by switching from among at least two alternative optical detectors and/or at least two detector amplifiers such as to minimize noise equivalent power (NEP) of a selected detector or combination of detector and amplifier under given operating conditions.Type: ApplicationFiled: March 9, 2010Publication date: May 16, 2013Applicant: Halilburton Energy Services, Inc.Inventors: Raj Pai, Marian Morys, Homi Phiroze Cooper, John Thomas
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Publication number: 20120298851Abstract: In some embodiments, apparatus and systems, as well as methods, may operate to receive radiation at an active detector of a pair of radiation detectors to provide a first signal proportional to an intensity of the radiation, to receive none of the radiation at a blind detector of the pair of radiation detectors to provide a second signal proportional to the reception of no radiation, and to combine the first signal and the second signal to provide an output signal representing the difference between the first signal and the second signal. The pair of radiation detectors may comprise thermopile detectors. Combination may occur via differential amplification. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: February 3, 2011Publication date: November 29, 2012Applicant: Halliburton Energy Services, Inc.Inventors: Raj Pai, Maria Morys, Phap Hung Lien
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Publication number: 20120211650Abstract: Various methods and tools optically analyze downhole fluid properties in situ. Some disclosed downhole optical radiometry tools include a tool body having a sample cell for fluid flow. A light beam passes through the sample cell and a spectral operation unit (SOU) such as a prism, filter, interferometer, or multivariate optical element (MOE). The resulting light provides a signal indicative of one or more properties of the fluid. A sensor configuration using electrically balanced thermopiles offers a high sensitivity over a wide temperature range. Further sensitivity is achieved by modulating the light beam and/or by providing a reference light beam that does not interact with the fluid flow. To provide a wide spectral range, some embodiments include multiple filaments in the light source, each filament having a different emission spectrum. Moreover, some embodiments include a second light source, sample cell, SOU, and detector to provide increased range, flexibility, and reliability.Type: ApplicationFiled: November 18, 2010Publication date: August 23, 2012Applicant: Halliburton Energy Services ,Inc.Inventors: Christopher M. Jones, Stephen A. Zannoni, Michael T. Pelletier, Raj Pai, Wei Zhang, Marina L. Morys
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Patent number: 8212568Abstract: An apparatus and method for minimizing the effects of a common mode voltage signal in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall. Two current electrodes are energized by an excitation source to create an oscillatory electric field in a borehole wall. A voltage drop across a segment of the borehole wall is measured by two voltage electrodes, and the differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole wall. A common mode voltage in front of the two voltage electrodes is measured and minimized by controlling the excitation source, thereby reducing the resistivity measurement error.Type: GrantFiled: April 12, 2010Date of Patent: July 3, 2012Assignee: Halliburton Energy Services, Inc.Inventors: Marian L. Morys, William J. Schaecher, George D. Goodman, Raj Pai
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Publication number: 20100231225Abstract: An apparatus and method for minimizing the effects of a common mode voltage signal in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall. Two current electrodes are energized by an excitation source to create an oscillatory electric field in a borehole wall. A voltage drop across a segment of the borehole wall is measured by two voltage electrodes, and the differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole wall. A common mode voltage in front of the two voltage electrodes is measured and minimized by controlling the excitation source, thereby reducing the resistivity measurement error.Type: ApplicationFiled: April 12, 2010Publication date: September 16, 2010Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Marian L. MORYS, William J. SCHAECHER, George D. GOODMAN, Raj PAI
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Patent number: 7696756Abstract: An apparatus and method for minimizing the effects of a common mode voltage signal in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall. Two current electrodes are energized by an excitation source to create an oscillatory electric field in a borehole wall. A voltage drop across a segment of the borehole wall is measured by two voltage electrodes, and the differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole wall. A common mode voltage in front of the two voltage electrodes is measured and minimized by controlling the excitation source, thereby reducing the resistivity measurement error.Type: GrantFiled: June 5, 2006Date of Patent: April 13, 2010Assignee: Halliburton Energy Services, Inc.Inventors: Marian L. Morys, William J. Schaecher, George D. Goodman, Raj Pai
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Patent number: 7579841Abstract: Oil-based mud imaging systems and methods having standoff compensation. In some embodiments, disclosed logging systems include a logging tool in communication with surface computing facilities. The logging tool is provided with a sensor array having at least two voltage electrodes positioned between two current electrodes energized by an excitation source to create an oscillatory electric field in a borehole wall. The two current electrodes are each shielded with conductive shields to prevent current leakage into the logging tool body. A common mode voltage is measured, and the phase and amplitude of the excitation source is controlled to reduce the difference between the common mode voltage and reference voltage of a voltage detector. The logging tool is further provided with electronics coupled to the voltage detector and the current electrodes to determine a differential voltage between the voltage electrodes and two current flows from separate ones of the current electrodes.Type: GrantFiled: September 2, 2006Date of Patent: August 25, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Luis E. San Martin, Humberto E. Rosa, Raj Pai, William J. Schaecher, Myrick L. Monroe, Marian L. Morys, Carl Dodge
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Publication number: 20070103162Abstract: An apparatus and method for minimizing the effects of a common mode voltage signal in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall. Two current electrodes are energized by an excitation source to create an oscillatory electric field in a borehole wall. A voltage drop across a segment of the borehole wall is measured by two voltage electrodes, and the differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole wall. A common mode voltage in front of the two voltage electrodes is measured and minimized by controlling the excitation source, thereby reducing the resistivity measurement error.Type: ApplicationFiled: June 5, 2006Publication date: May 10, 2007Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Marian Morys, William Schaecher, George Goodman, Raj Pai