Patents by Inventor Wolfgang P. Ziegler

Wolfgang P. Ziegler 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).

  • Methods for controlling ion beam and target voltage in a neutron generator for improved performance
    Patent number: 8594265
    Abstract: A method for operating a pulsed neutron generator includes adjusting a target current of the neutron generator to a preselected value. A parameter related to a neutron output of the neutron generator is measured. A target voltage of the neutron generator is adjusted to maintain the measured parameter within a predetermined range.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 26, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Luke T. Perkins, Peter Wraight, Wolfgang P. Ziegler, Robert A. Adolph
  • Methods for Controlling Ion Beam and Target Voltage in a Neutron Generator for Improved Performance
    Publication number: 20090219028
    Abstract: A method for operating a pulsed neutron generator includes adjusting a target current of the neutron generator to a preselected value. A parameter related to a neutron output of the neutron generator is measured. A target voltage of the neutron generator is adjusted to maintain the measured parameter within a predetermined range.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 3, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Luke T. Perkins, Peter Wraight, Wolfgang P. Ziegler, Robert A. Adolph
  • Accelerator-based methods and apparatus for measurement-while-drilling
    Patent number: 5539225
    Abstract: Measurement-while-drilling apparatus includes a 14 MeV neutron accelerator, a near-spaced neutron detector which primarily senses source neutrons and whose output is proportional to source strength, one or more intermediately-spaced epithermal neutron detectors eccentered against the drill collar wall and primarily responsive to formation hydrogen concentration, and a third far-spaced radiation detector, either gamma ray or neutron, primarily responsive to formation density. The intermediately-spaced and far-spaced detector outputs, normalized by the near-spaced detector output, are combined to provide measurements of porosity, density and lithology and to detect gas. A thermal neutron detector and/or a gamma ray detector may also be provided at intermediate spacings to provide additional information of interest, such as standoff measurements and spectral analysis of formation composition. Tool outputs are related to the angular or azimuthal orientation of the measurement apparatus in the borehole.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: July 23, 1996
    Assignee: Schlumberger Technology Corporation
    Inventors: William A. Loomis, Kenneth E. Stephenson, Jerome A. Truax, Wolfgang P. Ziegler, S. Zema Chowdhuri, Benoit Couet, Michael L. Evans, Paul Albats, Bradley A. Roscoe, Jacques M. Holenka, Keith A. Moriarty, William R. Sloan
  • Accelerator-based methods and apparatus for measurement-while-drilling
    Patent number: RE36012
    Abstract: Measurement-while-drilling apparatus includes a 14 MeV neutron accelerator, a near-spaced neutron detector which primarily senses source neutrons and whose output is proportional to source strength, one or more intermediately-spaced epithermal neutron detectors eccentered against the drill collar wall and primarily responsive to formation hydrogen concentration, and a third far-spaced radiation detector, either gamma ray or neutron, primarily responsive to formation density. The intermediately-spaced and far-spaced detector outputs, normalized by the near-spaced detector output, are combined to provide measurements of porosity, density and lithology and to detect gas. A thermal neutron detector and/or a gamma ray detector may also be provided at intermediate spacings to provide additional information of interest, such as standoff measurements and spectral analysis of formation composition. Tool outputs are related to the angular or azimuthal orientation of the measurement apparatus in the borehole.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: December 29, 1998
    Assignee: Schlumberger Technology Corporation
    Inventors: William A. Loomis, Kenneth E. Stephenson, Jerome A. Truax, Wolfgang P. Ziegler, S. Zema Chowdhuri, Benoit Couet, Michael L. Evans, Paul Albats, Bradley A. Roscoe, Jacques M. Holenka, Keith A. Moriarty, William R. Sloan