Patents by Inventor Christian Stoller
Christian Stoller 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: 11887746Abstract: Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.Type: GrantFiled: November 22, 2021Date of Patent: January 30, 2024Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Luke T. Perkins, Christian Stoller, Peter Wraight
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Patent number: 11815646Abstract: A method for making natural gamma ray measurements of a subterranean formation includes causing a natural gamma ray sensor on an LWD tool to acquire a spectral gamma ray measurement while a neutron source emits neutrons. The measurements are evaluated to compute first and second drilling fluid activation corrections using corresponding first and second correction methodologies. The first and second corrections are processed to compute a third drilling fluid activation correction which is applied to the gamma ray measurements to compute a corrected total natural gamma ray measurement.Type: GrantFiled: July 8, 2019Date of Patent: November 14, 2023Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Marie-Laure Mauborgne, Christian Stoller
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Patent number: 11774629Abstract: A presence of cement may be identified based on a downhole tool that may emit neutrons into a wellbore having at least one cement casing. The neutrons may interact with the particular material via inelastic scattering, inelastic neutron reactions, capture of neutrons and/or neutron activation through one of these reactions and cause a material to emit an energy spectrum of gamma rays, and wherein the downhole tool is configured to detect an energy spectrum of the gamma rays that is specific to at least one of a plurality of elements and associated a region within the wellbore. An amount of elements, such as calcium and silicon, may be determined from the gamma ray spectra that may indicate a present of cement within the wellbore.Type: GrantFiled: August 30, 2021Date of Patent: October 3, 2023Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Pascal Millot, Adil Busaidy, Jeffrey Miles, Tong Zhou, Christian Stoller, David Rose, Richard Radtke
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Publication number: 20220115157Abstract: Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.Type: ApplicationFiled: November 22, 2021Publication date: April 14, 2022Inventors: Luke T. Perkins, Christian Stoller, Peter Wraight
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Publication number: 20210389495Abstract: A presence of cement may be identified based on a downhole tool that may emit neutrons into a wellbore having at least one cement casing. The neutrons may interact with the particular material via inelastic scattering, inelastic neutron reactions, capture of neutrons and/or neutron activation through one of these reactions and cause a material to emit an energy spectrum of gamma rays, and wherein the downhole tool is configured to detect an energy spectrum of the gamma rays that is specific to at least one of a plurality of elements and associated a region within the wellbore. An amount of elements, such as calcium and silicon, may be determined from the gamma ray spectra that may indicate a present of cement within the wellbore.Type: ApplicationFiled: August 30, 2021Publication date: December 16, 2021Inventors: Pascal Millot, Adil Busaidy, Jeffrey Miles, Tong Zhou, Christian Stoller, David Rose, Richard Radtke
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Patent number: 11189389Abstract: Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.Type: GrantFiled: November 22, 2019Date of Patent: November 30, 2021Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Luke T. Perkins, Christian Stoller, Peter Wraight
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Patent number: 11105952Abstract: A presence of cement may be identified based on a downhole tool that may emit neutrons into a wellbore having at least one cement casing. The neutrons may interact with the particular material via inelastic scattering, inelastic neutron reactions, capture of neutrons and/or neutron activation through one of these reactions and cause a material to emit an energy spectrum of gamma rays, and wherein the downhole tool is configured to detect an energy spectrum of the gamma rays that is specific to at least one of a plurality of elements and associated a region within the wellbore. An amount of elements, such as calcium and silicon, may be determined from the gamma ray spectra that may indicate a present of cement within the wellbore.Type: GrantFiled: January 31, 2019Date of Patent: August 31, 2021Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Pascal Millot, Adil Busaidy, Jeffrey Miles, Tong Zhou, Christian Stoller, David Rose, Richard Radtke
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Publication number: 20210230954Abstract: A method for making natural gamma ray measurements of a subterranean formation includes causing a natural gamma ray sensor on an LWD tool to acquire a spectral gamma ray measurement while a neutron source emits neutrons. The measurements are evaluated to compute first and second drilling fluid activation corrections using corresponding first and second correction methodologies. The first and second corrections are processed to compute a third drilling fluid activation correction which is applied to the gamma ray measurements to compute a corrected total natural gamma ray measurement.Type: ApplicationFiled: July 8, 2019Publication date: July 29, 2021Inventors: Marie-Laure Mauborgne, Christian Stoller
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Publication number: 20210096275Abstract: The current disclosure is related to a downhole tool that comprises an electronic photon generator and at least one detector. The electronic photon generator comprises a cathode configured to emit electrons, a first target configured to generate photons when struck by the electrons, a second target configured to generate photons when struck by the electrons, and a beam steering device that directs the electrons to a first or second target. The at least one detector is configured to detect at least some of the photons emitted by the first target and at least some of the photons emitted by the second target.Type: ApplicationFiled: December 14, 2020Publication date: April 1, 2021Inventors: Matthieu Simon, Christian Stoller
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Patent number: 10866337Abstract: The current disclosure is related to a downhole tool that comprises an electronic photon generator and at least one detector. The electronic photon generator comprises a cathode configured to emit electrons, a first target configured to generate photons when struck by the electrons, a second target configured to generate photons when struck by the electrons, and a beam steering device that directs the electrons to a first or second target. The at least one detector is configured to detect at least some of the photons emitted by the first target and at least some of the photons emitted by the second target.Type: GrantFiled: June 29, 2016Date of Patent: December 15, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Matthieu Simon, Christian Stoller
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Patent number: 10866336Abstract: A method for determining azimuthal formation information using neutron activation, wherein the formation is activated by a neutron source and the activation signal is measured by at least one detector trailing the neutron source during the logging operation. The number of detected gamma rays as a function of the detector azimuth may be used to provide azimuthal information for determining an image of the formation surrounding the borehole.Type: GrantFiled: February 17, 2020Date of Patent: December 15, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventor: Christian Stoller
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Patent number: 10845501Abstract: The present disclosure describes a downhole tool including an electrically operated radiation generator that selectively output radiation to a surrounding environment based at least in part on supply of electrical power; and a control system that determines likelihood of exposing living beings in the surrounding environment to output radiation by determining whether one or more check conditions is met; determine that each of the one or more check conditions is met before instructing the electrically operated radiation generator to output radiation; and instruct the electrically operated radiation generator to cease output of radiation when at least one of the one or more check conditions is no longer met.Type: GrantFiled: November 8, 2016Date of Patent: November 24, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Christian Stoller, Matthieu Simon, David Alan Rose, Libo Yang, Onur Ozen, Sicco Beekman
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Patent number: 10845502Abstract: Systems, methods, and devices for inelastic gamma-ray logging are provided. In one embodiment, such a method includes emitting neutrons into a subterranean formation from a downhole tool to produce inelastic gamma-rays, detecting a portion of the inelastic gamma-rays that scatter back to the downhole tool to obtain an inelastic gamma-ray signal, and determining a property of the subterranean formation based at least in part on the inelastic gamma-ray signal. The inelastic gamma-ray signal may be substantially free of epithermal and thermal neutron capture background.Type: GrantFiled: February 12, 2018Date of Patent: November 24, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Kenneth E. Stephenson, David Rose, Avtandil Tkabladze, Christian Stoller, John J. Simonetti
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Patent number: 10746895Abstract: A method for determining a fractional volume of at least one component of a formation includes entering into a computer a number of detected radiation events resulting from imparting neutrons into the formation at an energy level of at least 1 million electron volts (MeV). The detected radiation events correspond to at least one of an energy level of the imparted neutrons and thermal or epithermal energy neutrons. A measurement of at least one additional petrophysical parameter of the formation is made. The at least one additional petrophysical parameter measurement and at least one of a fast neutron cross-section and a thermal neutron cross-section determined from the detected radiation events are used in the computer to determine the fractional volume of the at least one component of the formation. In another embodiment, the fast neutron cross-section and the thermal neutron cross-section may be used on combination to determine the fractional volume.Type: GrantFiled: October 31, 2019Date of Patent: August 18, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Tong Zhou, Christian Stoller, James Leslie Thornton, David Alan Rose
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Patent number: 10690802Abstract: A method for evaluating cement in a cased wellbore in a geological formation includes placing a downhole tool into the cased wellbore, where the cased wellbore has been cased using a cement that contains a particular material. The method includes emitting neutrons using the downhole tool, wherein the neutrons interact with the particular material via inelastic scattering or capture of neutrons and cause the material to emit an energy spectrum of the gamma rays associated with the material or wherein the time-based measurement of gamma rays or neutrons is influenced by the presence of the material. The method includes using the downhole tool to detect radiation radiation, such as the energy spectrum of the gamma rays, or a die-away pattern of the gamma rays or neutrons that indicates a presence of the particular material and enable to estimate a parameter of the cement.Type: GrantFiled: July 25, 2017Date of Patent: June 23, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Christian Stoller, Alice Chougnet-Sirapian, Mauro Manclossi, Marie-Laure Mauborgne
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Publication number: 20200183045Abstract: A method for determining azimuthal formation information using neutron activation, wherein the formation is activated by a neutron source and the activation signal is measured by at least one detector trailing the neutron source during the logging operation. The number of detected gamma rays as a function of the detector azimuth may be used to provide azimuthal information for determining an image of the formation surrounding the borehole.Type: ApplicationFiled: February 17, 2020Publication date: June 11, 2020Inventor: Christian Stoller
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Patent number: 10663617Abstract: A downhole tool includes a radiation generator configured to output radiation using electrical power received from a power supply. A first portion of the radiation is emitted into a surrounding sub-surface formation. The downhole tool also includes a radiation detector coupled proximate the radiation generator. The radiation detector includes a micromesh gaseous detector, and the radiation detector is configured to output a measurement signal based at least in part on interaction between a second portion of the radiation output by the radiation generator and the radiation detector. Additionally, the downhole tool includes a control system communicatively coupled to the radiation generator and the radiation detector. The control system is configured to determine measured characteristics of the radiation output from the radiation generator based at least in part on the measurement signal and to control operation of the radiation generator based at least in part on the measured characteristics.Type: GrantFiled: December 29, 2016Date of Patent: May 26, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Mauro Manclossi, Laurent Laval, Christian Stoller
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Publication number: 20200098485Abstract: Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.Type: ApplicationFiled: November 22, 2019Publication date: March 26, 2020Inventors: Luke T. Perkins, Christian Stoller, Peter Wraight
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Publication number: 20200081149Abstract: A method for determining a fractional volume of at least one component of a formation includes entering into a computer a number of detected radiation events resulting from imparting neutrons into the formation at an energy level of at least 1 million electron volts (MeV). The detected radiation events correspond to at least one of an energy level of the imparted neutrons and thermal or epithermal energy neutrons. A measurement of at least one additional petrophysical parameter of the formation is made. The at least one additional petrophysical parameter measurement and at least one of a fast neutron cross-section and a thermal neutron cross-section determined from the detected radiation events are used in the computer to determine the fractional volume of the at least one component of the formation. In another embodiment, the fast neutron cross-section and the thermal neutron cross-section may be used on combination to determine the fractional volume.Type: ApplicationFiled: October 31, 2019Publication date: March 12, 2020Inventors: Tong Zhou, Christian Stoller, James Leslie Thornton, David Alan Rose
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Patent number: 10564311Abstract: A method for determining azimuthal formation information using neutron activation, wherein the formation is activated by a neutron source and the activation signal is measured by at least one detector trailing the neutron source during the logging operation. The number of detected gamma rays as a function of the detector azimuth may be used to provide azimuthal information for determining an image of the formation surrounding the borehole.Type: GrantFiled: September 30, 2013Date of Patent: February 18, 2020Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventor: Christian Stoller