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: 20150212230
    Abstract: A radiation detector is used in a well-logging tool for positioning in a wellbore of a geologic formation. The radiation detector includes a photomultiplier housing and a scintillator housing. A housing coupler joins together opposing ends of the photomultiplier housing and scintillator housing. A photomultiplier is contained within the photomultiplier housing and a scintillator body is contained within the scintillator housing. A scintillator window is secured to the housing coupler.
    Type: Application
    Filed: April 7, 2015
    Publication date: July 30, 2015
    Inventor: Christian Stoller
  • Publication number: 20150185358
    Abstract: Composition-matched downhole tools and methods for using such tools are provided. One such method includes emitting neutrons using a neutron source in the downhole tool to generate formation gamma rays in a surrounding formation. At the same time, however, some of the neutrons may interact with different parts of the downhole tool to form tool gamma rays. The gamma ray spectra of at least some of the formation gamma rays and the tool gamma rays may be detected using a gamma ray detector. The tool gamma rays from the different parts of the tool may have a substantially similar spectral shape. As such, a processor may be used to analyze the spectra of the tool gamma rays using a single tool background standard, thereby simplifying the analysis and improving the precision of the results.
    Type: Application
    Filed: December 31, 2013
    Publication date: July 2, 2015
    Applicant: Schlumberger Technology Corporation
    Inventors: Christian Stoller, Fabien Haranger, James Grau, Jeffrey Miles, Markus Berheide
  • Publication number: 20150185336
    Abstract: Systems, methods, and devices for thermally protecting a scintillator crystal of a scintillation detector are provided. In one example, a thermally-protected scintillator may include a scintillator crystal and a thermal protection element, which may partially surround the scintillator crystal. The thermal protection element may be configured to prevent the scintillator crystal from experiencing a rate of change in temperature sufficient to cause cracking or non-uniform light output, or a combination thereof.
    Type: Application
    Filed: March 10, 2015
    Publication date: July 2, 2015
    Inventors: Christian Stoller, Robert A. Adolph, Bradley A. Roscoe
  • Patent number: 9069095
    Abstract: A method is described for obtaining an accurate and precise value for radiation output of a radiation generator. Radiation is generated in the radiation generator, and the radiation output of the radiation generator is measured using a radiation monitoring device. An instantaneous inferred radiation output is determined from operating parameters of the radiation generator, and over a period of time a calibration factor between the measured and the instantaneous inferred radiation output is determined. The accurate and precise value for radiation output is determined from the instantaneous inferred radiation output and the determined calibration factor.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: June 30, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Sicco Beekman, Christian Stoller, Robert Arthur Adolph
  • Publication number: 20150168592
    Abstract: Systems and methods for measuring neutron-induced activation gamma-rays in a subterranean formation are provided. In one example, a downhole tool for measuring neutron-induced activation gamma-rays may include a neutron source and a gamma-ray detector. The neutron source may emit neutrons according to a pulsing scheme that includes a delay between two pulses. The delay may be sufficient to allow substantially all neutron capture events due to the emitted neutrons to cease. The gamma-ray detector may be configured to detect activation gamma-rays produced when elements activated by the emitted neutrons decay to a non-radioactive state.
    Type: Application
    Filed: March 2, 2015
    Publication date: June 18, 2015
    Inventors: Christian Stoller, Peter Wraight, Bradley A. Roscoe
  • Publication number: 20150168591
    Abstract: A method is described for obtaining an accurate and precise value for radiation output of a radiation generator. Radiation is generated in the radiation generator, and the radiation output of the radiation generator is measured using a radiation monitoring device. An instantaneous inferred radiation output is determined from operating parameters of the radiation generator, and over a period of time a calibration factor between the measured and the instantaneous inferred radiation output is determined. The accurate and precise value for radiation output is determined from the instantaneous inferred radiation output and the determined calibration factor.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 18, 2015
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: SICCO BEEKMAN, CHRISTIAN STOLLER
  • Patent number: 9052404
    Abstract: A well-logging device may include a housing to be positioned within a borehole of a subterranean formation, and at least one radiation source carried by the housing to direct radiation into the subterranean formation. The well-logging device may also include noble gas-based radiation detectors carried by the housing in azimuthally spaced relation to detect radiation from the subterranean formation. A controller may determine at least one property of the subterranean formation based upon the detected radiation from the noble gas-based radiation detectors.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: June 9, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael L. Evans, Avtandil Tkabladze, Christian Stoller
  • Publication number: 20150124921
    Abstract: A method is for creating a gamma ray source downhole by creating a radioactive material through irradiation of an inert material by high energy neutrons, wherein the material to be activated may surround the neutron source in close proximity to form a compact gamma ray source. The gamma rays generated by the activation may be used to perform nuclear measurements downhole.
    Type: Application
    Filed: November 5, 2013
    Publication date: May 7, 2015
    Applicant: Schlumberger Technology Corporation
    Inventors: Joel Groves, Christian Stoller
  • Patent number: 9008969
    Abstract: Method and system for analyzing electrical pulses contained in a pulse train signal representative of the interaction of x-ray bursts with a nuclear detector configured for subsurface disposal. The pulse train signal is sampled to form a digitized signal. The total energy deposited at the detector during an x-ray burst is determined from the digitized signal, and a count rate of x-ray pulses from the burst is determined. A subsurface parameter is determined using the total energy deposit.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: April 14, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Christian Stoller, Olivier G. Philip
  • Patent number: 9000359
    Abstract: A radiation detector is used in a well-logging tool for positioning in a wellbore of a geologic formation. The radiation detector includes a photomultiplier housing and a scintillator housing. A housing coupler joins together opposing ends of the photomultiplier housing and scintillator housing. A photomultiplier is contained within the photomultiplier housing and a scintillator body is contained within the scintillator housing. A scintillator window is secured to the housing coupler.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 7, 2015
    Assignee: Schlumberger Technology Corporation
    Inventor: Christian Stoller
  • Patent number: 9000379
    Abstract: Methods for pre-treating packaging materials of particular composition for use in conjunction with a scintillation crystal are disclosed. The packaging materials may comprise a reflecting material, an elastomer, a reflecting fluorocarbon polymer, a polymer or elastomer loaded with a reflecting inorganic powder (including a reflecting inorganic powder comprising a high reflectance material selected from the group comprising Al2O3, TiO2, BN, MgO, BaSO4 and mixtures thereof), or a highly reflective metal foil selected from the group comprising Ag and Al that is chemically compatible with the scintillator crystal. The scintillator crystal may comprise a crystal selected from the group comprising NaI(Tl), LaBr3:Ce, La—Cl3:Ce, La-halides, and La-mixed halides.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: April 7, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: John J. Simonetti, Donna Simonetti, Albert Hort, Christian Stoller
  • Publication number: 20150090870
    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: September 30, 2013
    Publication date: April 2, 2015
    Applicant: Schlumberger Technology Corporation
    Inventor: Christian Stoller
  • Patent number: 8987670
    Abstract: Systems, methods, and devices for thermally protecting a scintillator crystal of a scintillation detector are provided. In one example, a thermally-protected scintillator may include a scintillator crystal and a thermal protection element, which may partially surround the scintillator crystal. The thermal protection element may be configured to prevent the scintillator crystal from experiencing a rate of change in temperature sufficient to cause cracking or non-uniform light output, or a combination thereof.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: March 24, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Christian Stoller, Robert A. Adolph, Bradley Albert Roscoe
  • Patent number: 8975574
    Abstract: A well-logging tool may be positioned within a borehole of a subterranean formation. The well-logging tool may include a housing having an interior defining a dual-detector receiving chamber extending longitudinally, and having first and second portions, and a first azimuthal radiation detector carried by the first portion of the dual-detector receiving chamber. The first azimuthal radiation detector may include a first gamma-ray detector and a first photodetector associated with the first gamma-ray detector. The well-logging tool may include a second spectral radiation detector carried by the second portion of the dual-detector receiving chamber. The second spectral radiation detector may include a second gamma-ray detector and a second photodetector associated with the second gamma-ray detector.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: March 10, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Cornelis Huiszoon, Libai Xu, Christian Stoller, Robert Little, Peter Wraight
  • Patent number: 8969793
    Abstract: Systems and methods for measuring neutron-induced activation gamma-rays in a subterranean formation are provided. In one example, a downhole tool for measuring neutron-induced activation gamma-rays may include a neutron source and a gamma-ray detector. The neutron source may emit neutrons according to a pulsing scheme that includes a delay between two pulses. The delay may be sufficient to allow substantially all neutron capture events due to the emitted neutrons to cease. The gamma-ray detector may be configured to detect activation gamma-rays produced when elements activated by the emitted neutrons decay to a non-radioactive state.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: March 3, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Christian Stoller, Peter Wraight, Brad Roscoe
  • Patent number: 8969792
    Abstract: An apparatus can measure characteristics of a formation surrounding a borehole. The apparatus includes a tool body having a neutron measurement section and a density measurement section. The neutron measurement section includes a neutron source and a neutron detector arrangement spaced in an axial direction from the neutron source. The density measurement section includes a gamma ray source and a gamma ray detector arrangement spaced in an axial direction from the gamma ray source. The neutron measurement section and the density measurement section are positioned in the tool body so that the sections overlap in the axial direction and are azimuthally spaced apart in the tool body. The tool body also includes shielding to block a direct signal path from the neutron source to the gamma ray detector arrangement and to block a direct signal path from the gamma ray source to the neutron detector arrangement.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: March 3, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael L. Evans, Christian Stoller
  • Publication number: 20150055747
    Abstract: A well-logging tool may include a sonde housing, and a radiation generator carried by the sonde housing. The radiation generator may include a generator housing, a target carried by the generator housing, a charged particle source carried by the generator housing to direct charged particles at the target, and at least one voltage source coupled to the charged particle source. The at least one voltage source may include a voltage ladder comprising a plurality of voltage multiplication stages coupled in a bi-polar configuration, and at least one loading coil coupled at at least one intermediate position along the voltage ladder. The well-logging tool may further include at least one radiation detector carried by the sonde housing.
    Type: Application
    Filed: September 14, 2012
    Publication date: February 26, 2015
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Matthieu Simon, Anthony Durkowski, Christian Stoller
  • Publication number: 20150055748
    Abstract: A well-logging tool may include a sonde housing and a radiation generator carried by the sonde housing. The radiation generator may include a generator housing, a target carried by the generator housing, a charged particle source carried by the generator housing to direct charged particles at the target, and at least one voltage source coupled to the charged particle source. The at least one voltage source may include a voltage ladder comprising a plurality of voltage multiplication stages coupled in a uni-polar configuration, and at least one loading coil coupled at at least one intermediate position along the voltage ladder. The well-logging tool may further include at least one radiation detector carried by the sonde housing.
    Type: Application
    Filed: September 14, 2012
    Publication date: February 26, 2015
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Matthieu Simon, Anthony Durkowski, Christian Stoller
  • Publication number: 20150014544
    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: Application
    Filed: October 28, 2011
    Publication date: January 15, 2015
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ken Stephenson, Peter Wraight, Wolfgang Ziegler, Christian Stoller, Irina Molodetsky
  • Patent number: 8927923
    Abstract: An insert apparatus for use in a test formation for a downhole nuclear spectroscopy tool includes an outer liner, and an inner liner defining a cylindrical borehole having a diameter such that the downhole nuclear spectroscopy tool is receivable therein. There is fill material between the outer liner and the inner liner, the material including a formation base material and an elemental standards material. The outer liner, the inner liner, and the fill material are configured such that an elemental standard measurement derived from a test using the insert apparatus is equivalent to an elemental standard measurement from a selected formation.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: January 6, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Christian Stoller, Richard J. Radtke, Raju M. Eason, Scott H. Fricke