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).

  • Publication number: 20210096275
    Abstract: 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: Application
    Filed: December 14, 2020
    Publication date: April 1, 2021
    Inventors: Matthieu Simon, Christian Stoller
  • Patent number: 10866337
    Abstract: 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: Grant
    Filed: June 29, 2016
    Date of Patent: December 15, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Matthieu Simon, Christian Stoller
  • Patent number: 10866336
    Abstract: 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: Grant
    Filed: February 17, 2020
    Date of Patent: December 15, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Christian Stoller
  • Patent number: 10845502
    Abstract: 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: Grant
    Filed: February 12, 2018
    Date of Patent: November 24, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kenneth E. Stephenson, David Rose, Avtandil Tkabladze, Christian Stoller, John J. Simonetti
  • Patent number: 10845501
    Abstract: 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: Grant
    Filed: November 8, 2016
    Date of Patent: November 24, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Christian Stoller, Matthieu Simon, David Alan Rose, Libo Yang, Onur Ozen, Sicco Beekman
  • Patent number: 10746895
    Abstract: 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: Grant
    Filed: October 31, 2019
    Date of Patent: August 18, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Tong Zhou, Christian Stoller, James Leslie Thornton, David Alan Rose
  • Patent number: 10690802
    Abstract: 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: Grant
    Filed: July 25, 2017
    Date of Patent: June 23, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Christian Stoller, Alice Chougnet-Sirapian, Mauro Manclossi, Marie-Laure Mauborgne
  • Publication number: 20200183045
    Abstract: 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: Application
    Filed: February 17, 2020
    Publication date: June 11, 2020
    Inventor: Christian Stoller
  • Patent number: 10663617
    Abstract: 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: Grant
    Filed: December 29, 2016
    Date of Patent: May 26, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Mauro Manclossi, Laurent Laval, Christian Stoller
  • Publication number: 20200098485
    Abstract: 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: Application
    Filed: November 22, 2019
    Publication date: March 26, 2020
    Inventors: Luke T. Perkins, Christian Stoller, Peter Wraight
  • Publication number: 20200081149
    Abstract: 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: Application
    Filed: October 31, 2019
    Publication date: March 12, 2020
    Inventors: Tong Zhou, Christian Stoller, James Leslie Thornton, David Alan Rose
  • Patent number: 10564311
    Abstract: 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: Grant
    Filed: September 30, 2013
    Date of Patent: February 18, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Christian Stoller
  • Patent number: 10502046
    Abstract: A downhole tool operable for conveyance within a wellbore extending into a subterranean formation, and for obtaining one or more measurements of the subterranean formation, wherein the downhole tool comprises a sensor, a pressure housing containing the sensor and mounted on an external surface of the downhole tool, and a sliding stabilizer covering the pressure housing.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: December 10, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ahmed Amine Mahjoub, Sebastien Isambert, Emmanuel Fayeulle, Didier Fouillou, Michael L. Evans, Christian Stoller
  • Patent number: 10490312
    Abstract: 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: Grant
    Filed: April 13, 2018
    Date of Patent: November 26, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Luke T. Perkins, Christian Stoller, Peter Wraight
  • Patent number: 10466383
    Abstract: 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: Grant
    Filed: May 29, 2015
    Date of Patent: November 5, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Tong Zhou, Christian Stoller, James Leslie Thornton, David Alan Rose
  • Patent number: 10436918
    Abstract: A scintillator type radiation detector package is provided including a scintillation crystal directly coupled to the window of a photomultiplier. A scintillator package is also provided having a longer life at wellbore temperature with minimal deterioration of a hygroscopic scintillation crystal(s). Direct optical coupling of the scintillator to the photomultiplier reduces the amount of light lost at coupling interfaces and improved detection resolution over the conventional structures having separate packages for crystal and photomultiplier.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: October 8, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ken Stephenson, Peter Wraight, Wolfgang Ziegler, John J. Simonetti, Christian Stoller, Irina Molodetsky
  • Patent number: 10408969
    Abstract: Devices and methods for a rugged semiconductor radiation detector are provided. The semiconductor detector may include a hermetically sealed housing and a semiconductor disposed within the housing that has a first surface and a second surface opposite one another. A first metallization layer may at least partially cover the first surface of the semiconductor and a second metallization layer may at least partially cover the second surface of the semiconductor. The first metallization layer or the second metallization layer, or both, do not extend completely to an edge of the semiconductor, thereby providing a nonconductive buffer zone. This reduces electrical field stresses that occur when a voltage potential is applied between the first metallization layer and the second metallization layer and reduces a likelihood of electrical failure (e.g., due to arcing).
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: September 10, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Frederic Gicquel, Olivier G. Philip, Christian Stoller, Zilu Zhou
  • Publication number: 20190235125
    Abstract: 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: Application
    Filed: January 31, 2019
    Publication date: August 1, 2019
    Inventors: Pascal Millot, Adil Busaidy, Jeffrey Miles, Tong Zhou, Christian Stoller, David Rose, Richard Radtke
  • Patent number: 10365398
    Abstract: A method for evaluating wellbore conduit condition includes using measurements of at least one of (i) inelastic gamma rays made during emission a burst of neutrons into the conduit from within the conduit at at least one spaced apart location from a position of the emission and (ii) epithermal neutrons or capture gamma rays therefrom detected at at least two spaced apart locations from the position of the emission within a selected time after the emission. The at least one of the measurements of inelastic gamma rays and epithermal neutron or capture gamma ray counts are characterized to estimate an amount of loss of iron in the conduit.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: July 30, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Sicco Beekman, Tong Zhou, David Alan Rose, Christian Stoller
  • Patent number: 10317568
    Abstract: The disclosure relates to a method for correcting a downhole natural gamma-ray measurement performed in a wellbore. A gamma-ray measurement including at least a gamma-ray count rate is obtained by a gamma-ray detector disposed in a bottom hole assembly having a mud channel inside of the assembly, such that mud flows downwards in the mud channel and upwards outside of the assembly and a neutron source situated above the gamma-ray detector and activating the mud.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: June 11, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Marie-Laure Mauborgne, Francoise Allioli, Fabien Haranger, Christian Stoller