Patents by Inventor Yi-Qiao Song

Yi-Qiao Song 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).

  • Patent number: 9851420
    Abstract: A transmitter for a magnetic resonance (MR) system, such as nuclear magnetic resonance (NMR) system, is described herein. The transmitter includes a coil for applying NMR pulse sequences to a substance. The coil includes a first coil section and a second coil section. The first coil section and second coil section pass current in opposite polarity. The transmitter may also include a transmitter circuit for generating the NMR pulse sequences and providing the NMR pulse sequences to the coil. The transmitter circuit includes a first switch that selectively powers the first coil section and a second switch that selectively powers the second coil section. Operation of the first switch and the second switch generates the NMR pulse sequences.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: December 26, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Yi-Qiao Song
  • Publication number: 20170357025
    Abstract: Illustrative embodiments are directed to applying a nuclear magnetic resonance sequence to a substance within an inhomogeneous static magnetic field. Various embodiments include applying a series of refocusing pulses to the substance, each refocusing pulse in the series of refocusing pulses having at least two segments, and a total pulse duration less than or equal to approximately 1.414 times T180. Various embodiments can further include applying an excitation pulse to the substance in the inhomogeneous static magnetic field, where the excitation pulse generates an initial magnetization that is aligned with a refocusing axis produced by a refocusing cycle that is performed after the excitation pulse.
    Type: Application
    Filed: April 21, 2017
    Publication date: December 14, 2017
    Inventors: MARTIN D. HÜRLIMANN, SOUMYAJIT MANDAL, VAN MAI DO, YI-QIAO SONG
  • Patent number: 9823205
    Abstract: Methods and systems for determining surface relaxivity from nuclear magnetic resonance measurements relate to applying multiple nuclear magnetic resonance (NMR) diffusion editing Carr-Purcell-Meiboom-Gill (CPMG) pulse sequences to the porous medium, wherein the diffusion editing CPMG pulse sequences have a diffusion encoding time ?; receiving NMR data generated by the pulse sequences; processing the received NMR data to obtain a distribution f(T2,D) for the diffusion encoding time ?; repeating the applying, the receiving, and the processing at least one time for pulse sequences having different respective diffusion encoding times ? to obtain respective distributions f(T2,D) corresponding respectively to the different diffusion encoding times ?; and utilizing the respectively obtained distributions f(T2,D) to generate a surface relaxivity (?) determination.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: November 21, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Zhixiang Luo, Jeffrey Paulsen, Yi-Qiao Song
  • Publication number: 20170322338
    Abstract: A nuclear magnetic resonance (NMR) system that uses a feedback induction coil to detect NMR signals generated within a substance is described herein. In one embodiment, the NMR system uses the Earth's magnetic field in conjunction with a transmitter coil that applies NMR sequences to a formation. The NMR sequences generate a weak NMR signal within the formation due to the weakness of the Earth's magnetic field. This weak NMR signal is detected using the feedback induction coil.
    Type: Application
    Filed: July 25, 2017
    Publication date: November 9, 2017
    Inventors: Yi-Qiao Song, Michael Wilt, Pabitra Sen
  • Patent number: 9771789
    Abstract: A downhole tool includes a cylindrical housing. A magnet and an antenna may be positioned within the housing. An excluder may be positioned around the housing, and a thickness of the excluder may vary around the housing.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: September 26, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Irfan Bulu, Yi-Qiao Song, Jagdish Shah
  • Patent number: 9759830
    Abstract: A formation fluid sample is analyzed using NMR spectroscopy to obtain a NMR spectrum. The NMR spectrum is then analyzed to find evidence of the amount of olefins present in the sample. The amount of olefins present in the sample can then be correlated to the level of contamination of the sample. In one embodiment, a 1H chemical shift of between substantially 4.5 and 6 ppm is used to identify olefins present in the sample. In another embodiment, a 1H chemical shift of substantially 1.9 to 2.1 ppm is used to identify olefins present in the sample. The NMR spectral equipment can be located uphole or downhole.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: September 12, 2017
    Assignee: Schlumberger Technology Corporation
    Inventors: A. Ballard Andrews, Soraya S. Betancourt, Andrew E. Pomerantz, Soumyajit Mandal, Yi-Qiao Song
  • Publication number: 20170248732
    Abstract: An NMR system includes a radio frequency (RF) NMR application-specific integrated circuit (ASIC) chip configured to generate an RF output signal and a rectifier configured to receive the RF output signal and convert the RF output signal to (a) a direct current (DC) pulsed field gradient (PFG) signal or (b) a DC trigger signal for at least one of (i) activating at least one component of an NMR system external to the NMR RF ASIC chip and (ii) synchronizing at least one component of an NMR system external to the NMR RF ASIC chip.
    Type: Application
    Filed: August 27, 2015
    Publication date: August 31, 2017
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Yi-Qiao Song, Soumyajit Mandal, Yiqiao Tang, David McCowan
  • Patent number: 9720124
    Abstract: Apparatus and methods for characterizing hydrocarbons in a subterranean formation include obtaining a sample of the subterranean formation; measuring, uphole, the porosity of the sample; using a nuclear magnetic resonance (NMR) tool downhole in the borehole, sending NMR pulse sequences configured for formation pore size and measuring NMR signals that characterize the formation at a location in the formation; analyzing the signals to find a gas porosity of the formation at the location; and determining a hydrogen index (HIg) of the subterranean formation from the gas porosity and from the porosity of the sample. The obtained HIg may then be used in conjunction with downhole NMR measurements to find corrected gas porosities at locations of the formation.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: August 1, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ravinath Kausik Kadayam Viswanathan, Chanh Cao Minh, Ridvan Akkurt, Baarinadh Vissapragada, Yi-Qiao Song, Lukasz Zielinski
  • Patent number: 9715033
    Abstract: Methods and apparatuses are provided for analyzing a composition of a hydrocarbon-containing fluid. The methods include using a nuclear magnetic resonance (NMR) tool to conduct an NMR measurement on the hydrocarbon-containing fluid to obtain NMR data. A non-NMR tool, such as an optical tool, is used to conduct additional measurements on the hydrocarbon-containing fluid and to obtain non-NMR data on the fluid. An indication of the composition of the fluid can be determined by using the NMR data and the non-NMR data in an inversion process.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: July 25, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Denise E. Freed, Yi-Qiao Song, Lalitha Venkataramanan, Lukasz Zielinski, Nicholas A. Bennett, Martin D. Hürlimann
  • Publication number: 20170205528
    Abstract: Methods and systems are provided for tools having non-resonant circuits for analyzing a formation and/or a sample. For example, nuclear magnetic resonance and resistivity tools can make use of a non-resonant excitation coil and/or a detection coil. These coils can achieve desired frequencies by the use of switches, thereby removing the requirement of tuning circuits that are typical in conventional tools.
    Type: Application
    Filed: April 5, 2017
    Publication date: July 20, 2017
    Inventors: Timothy Andrew John Hopper, David G Cory, Julius Kusuma, Yi-Qiao Song, Martin D. Hurlimann, Martin E. Poitzsch
  • Patent number: 9689937
    Abstract: A non-resonant transmitter for a magnetic resonance (MR) system, such as a nuclear magnetic resonance (NMR) system, is described herein. The transmitter includes a coil for applying NMR pulse sequences to a substance. The coil is coupled to a circuit that includes a capacitor, a number of switches, and a power source. The transmitter operates in two modes. In a charging mode, the switches decouple the coil from the capacitor and the capacitor is charged by the power source. In a discharging mode, a radio frequency pulse is generated and the switches couple and decouple the coil from the capacitor so that the capacitor provides power to the coil. The addition of the capacitor improves the power factor of the circuit and reduces power draw from the power source.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: June 27, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Yi-Qiao Song, Soumyajit Mandal
  • Publication number: 20170176626
    Abstract: Systems and methods are described herein for investigating a downhole formation using a nuclear magnetic resonance (NMR) tool. The tool includes multiple detectors spaced along an axis parallel to a length of the wellbore. While the tool is moving through the wellbore, NMR pulse sequences are applied to the formation and resulting NMR signals are detected by the detectors. The data obtained over a period of time by the multiple detectors are inverted together to obtain an indication of a parameter of the formation at multiple locations along the length of the wellbore.
    Type: Application
    Filed: December 18, 2015
    Publication date: June 22, 2017
    Inventors: Jeffrey L. Paulsen, Gal Shulkind, Yi-Qiao Song, Lalitha Venkataramanan
  • Publication number: 20170176550
    Abstract: A system and method for magnetic resonance imaging (MRI) of a subject employs an elongate housing configured to be held and manipulated in a user's hand. The housing supports at least one permanent magnet and at least one RF coil. A device positioning subsystem measures position and orientation of the housing. An electronic subsystem interfaces to the at least one RF coil and to the device positioning subsystem. The electronic subsystem is configured to i) execute pulse sequences where each pulse sequence transmits at least one RF pulse into body tissue of the subject and acquires MRI signals from the body tissue of the subject, ii) acquire position data representing position and orientation of the housing during the pulse sequences from the device positioning subsystem, and iii) process the MRI signals of i) together with the position data of ii) to derive an image of the body tissue of the subject.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 22, 2017
    Inventor: Yi-Qiao Song
  • Publication number: 20170176628
    Abstract: Systems and methods are provided for investigating a downhole formation using a nuclear magnetic resonance (NMR) tool. While the tool is moving through the borehole, the formation is magnetized and resulting signals are obtained. In accordance with the present approach, the acquired signals can be resolved azimuthally and/or laterally and can be reconstructed to obtain an indication of a parameter of the formation at multiple locations along the length of the borehole.
    Type: Application
    Filed: December 18, 2015
    Publication date: June 22, 2017
    Inventors: Jeffrey L. Paulsen, Yi-Qiao Song, Lalitha Venkataramanan, Robert Callan
  • Patent number: 9678182
    Abstract: A magnetic resonance (MR) receiver is described herein. The MR receiver can be used to process nuclear magnetic resonance (NMR) signals. The MR receiver includes a transformer that amplifies the MR signals and a preamplifier that receives the MR signals from the transformer. The preamplifier can include a transimpedance amplifier circuit with an input stage that includes a field effect transistor.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 13, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Soumyajit Mandal, Shin Utsuzawa, Yi-Qiao Song
  • Patent number: 9658358
    Abstract: Illustrative embodiments are directed to applying a nuclear magnetic resonance sequence to a substance within an inhomogeneous static magnetic field. Various embodiments include applying a series of refocusing pulses to the substance, each refocusing pulse in the series of refocusing pulses having at least two segments, and a total pulse duration less than or equal to approximately 1.414 times T180. Various embodiments can further include applying an excitation pulse to the substance in the inhomogeneous static magnetic field, where the excitation pulse generates an initial magnetization that is aligned with a refocusing axis produced by a refocusing cycle that is performed after the excitation pulse.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: May 23, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Martin D. Hürlimann, Soumyajit Mandal, Van Mai Do, Yi-Qiao Song
  • Patent number: 9632203
    Abstract: Methods and systems are provided for tools having non-resonant circuits for analyzing a formation and/or a sample. For example, nuclear magnetic resonance and resistivity tools can make use of a non-resonant excitation coil and/or a detection coil. These coils can achieve desired frequencies by the use of switches, thereby removing the requirement of tuning circuits that are typical in conventional tools.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: April 25, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Tim Hopper, David G Cory, Julius Kusuma, Yi-Qiao Song, Martin D. Hurlimann, Martin E. Poitzsch
  • Patent number: 9541513
    Abstract: A method and system for determining a property of a substance using nuclear magnetic resonance (NMR) is described herein. The method includes applying a NMR pulse sequence to the substance. The NMR pulse sequence includes a first set of pulses and a second set of pulses. The first set of pulses and the second set of pulses encode for overlapping diffusion times. By overlapping diffusion times, the NMR pulse sequence can be used to measure a diffusion coefficient for a first diffusion time, a diffusion coefficient for a second diffusion time, and a correlation between the two overlapping diffusion times. This information, in turn, can be used to differentiate between intrinsic bulk diffusivity of the substance and the reduced diffusivity of the substance caused by restricted diffusion.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: January 10, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Jeffrey L. Paulsen, Yi-Qiao Song
  • Publication number: 20160305239
    Abstract: A downhole logging tool, in an illustrative embodiment, includes an NMR measurement system with surface NMR microcoils located on an outer surface of the downhole logging tool. Each surface NMR microcoil has a central axis and is distributed around the outer surface of the logging tool with the surface NMR microcoil central axis perpendicular to the longitudinal axis of the logging tool. The NMR measurement system may have a central flow line in fluid communication with the drilling fluid. Additional surface NMR microcoils or a flow line microcoil may be disposed circumferentially around the central flow line with the surface NMR microcoil central axis and the flow line NMR microcoil central axis, respectively, perpendicular and parallel to the central flow line longitudinal axis. The NMR measurement system may include a bypass flow line in fluid communication with fluid in the wellbore annulus and/or the drill pipe.
    Type: Application
    Filed: December 8, 2014
    Publication date: October 20, 2016
    Inventors: Timothy Andrew John Hopper, Yi-Qiao Song
  • Publication number: 20160274204
    Abstract: An integrated circuit is provided for use in conjunction with an external antenna. The integrated circuit includes a memory circuit, a pulse sequencer, an NMR transmitter circuit and an NMR receiver circuit. The memory circuit is configured to store user-defined parameter data pertaining to an excitation period and an acquisition period that are part of an NMR pulse sequence. The pulse sequencer and the NMR transmitter circuit are configured to cooperate to generate RF signals in accordance the user-defined parameter data stored in the memory circuit, wherein such RF signals are supplied to the external antenna for emitting excitation signals from the external antenna during the excitation period of the NMR pulse sequence. The NMR receiver circuit is configured to receive electrical signals generated by the external antenna during the acquisition period of the NMR pulse sequence.
    Type: Application
    Filed: October 28, 2014
    Publication date: September 22, 2016
    Applicants: SCHLUMBERGER TECHNOLOGY CORPORATION, PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Yi-qiao Song, Jeffrey Paulsen, Donhee Ham, Dongwan Ha