Patents by Inventor Ulrich Scheven

Ulrich Scheven 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).

  • Downhole NMR flow and formation characterization while sampling fluids
    Patent number: 7180288
    Abstract: A method of measuring characteristics of a flowing fluid is described including: (a) providing a flowing fluid; (b) applying a static field gradient to the flowing fluid; (c) applying a series of nuclear magnetic resonance pulses to the flowing fluid; (d) detecting signals from the flowing fluid, wherein the signals are generated in response to the nuclear magnetic resonance pulses; and (e) analyzing the real and imaginary components of the signals to determine one or more characteristics of the flowing fluid. Also described is an apparatus for implementing this method.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: February 20, 2007
    Assignee: Schlumberger Technology Corporation
    Inventor: Ulrich Scheven
  • Downhole NMR flow and formation characterization while sampling fluids
    Publication number: 20060097722
    Abstract: A method of measuring characteristics of a flowing fluid is described including: (a) providing a flowing fluid; (b) applying a static field gradient to the flowing fluid; (c) applying a series of nuclear magnetic resonance pulses to the flowing fluid; (d) detecting signals from the flowing fluid, wherein the signals are generated in response to the nuclear magnetic resonance pulses; and (e) analyzing the real and imaginary components of the signals to determine one or more characteristics of the flowing fluid. Also described is an apparatus for implementing this method.
    Type: Application
    Filed: November 10, 2004
    Publication date: May 11, 2006
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Ulrich Scheven
  • Nuclear magnetic resonance methods for extracting information about a fluid in a rock
    Patent number: 6597171
    Abstract: Nuclear magnetic resonance methods for extracting information about a fluid in a rock are described. A system of nuclear spins in the fluid are prepared in a driven equilibrium, and a series of magnetic resonance signals generated from the fluid. The series of magnetic resonance signals is detected and analyzed to extract information about the fluid in the rock.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: July 22, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Martin D. Hurlimann, Olivier J. Terneaud, Denise Freed, Ulrich Scheven, Lalitha Venkataramanan
  • Nuclear magnetic resonance logging based on steady-state free precession
    Patent number: 6580272
    Abstract: Nuclear magnetic resonance logging methods that detect and analyze a steady state free precession (SSFP) signal are described. In some embodiments, Carr-Purcell-Meiboom-Gill (CPMG) spin echoes are detected along with the SSFP signals. From the SSFP signal, either alone or in combination with CPMG signals, information about a region of an earth formation, such as porosity, bound fluid volume and diffusion, may be extracted.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: June 17, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Denise Freed, Martin D. Hürlimann, Ulrich Scheven
  • NUCLEAR MAGNETIC RESONANCE LOGGING BASED ON STEADY-STATE FREE PRECESSION
    Publication number: 20030085702
    Abstract: Nuclear magnetic resonance logging methods that detect and analyze a steady state free precession (SSFP) signal are described. In some embodiments, Carr-Purcell-Meiboom-Gill (CPMG) spin echoes are detected along with the SSFP signals. From the SSFP signal, either alone or in combination with CPMG signals, information about a region of an earth formation, such as porosity, bound fluid volume and diffusion, may be extracted.
    Type: Application
    Filed: November 6, 2001
    Publication date: May 8, 2003
    Applicant: SCLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Denise Freed, Martin D. Hurlimann, Ulrich Scheven
  • Nuclear magnetic resonance methods for extracting information about a fluid in a rock
    Publication number: 20020105326
    Abstract: Nuclear magnetic resonance methods for extracting information about a fluid in a rock are described. A system of nuclear spins in the fluid are prepared in a driven equilibrium, and a series of magnetic resonance signals generated from the fluid. The series of magnetic resonance signals is detected and analyzed to extract information about the fluid in the rock.
    Type: Application
    Filed: July 20, 2001
    Publication date: August 8, 2002
    Inventors: Martin D. Hurlimann, Olivier J. Terneaud, Denise Freed, Ulrich Scheven, Lalitha Venkataramanan