Patents by Inventor Shanjun Li
Shanjun Li 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).
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Patent number: 9360584Abstract: Various embodiments include apparatus and methods to detect and locate conductive structures below the earth's surface. Tools can be configured with receiving sensors arranged to receive signals generated from a conductive structure in response to a current flowing on the conductive structure. Magnetic-related values from the signals can be processed, relative to the tool, to determine a position of a conductive structure from which the signal was generated in response to current flowing on the conductive structure. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: March 4, 2014Date of Patent: June 7, 2016Assignee: Halliburton Energy Services, Inc.Inventors: Shanjun Li, Michael S. Bittar, Dagang Wu
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Patent number: 9354349Abstract: Various embodiments include apparatus and methods to detect and locate conductive structures below the earth's surface. Tools can be configured with receiving sensors arranged to receive signals generated from a conductive structure in response to a current flowing on the conductive structure. Magnetic-related values from the signals can be processed, relative to the tool, to determine a position of a conductive structure from which the signal was generated in response to current flowing on the conductive structure. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: November 18, 2011Date of Patent: May 31, 2016Assignee: Halliburton Energy Services, Inc.Inventors: Shanjun Li, Michael S. Bittar, Dagang Wu
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Patent number: 9341735Abstract: An apparatus and method for simultaneously obtaining quantitative measurements of vertical and horizontal resistivity and permittivity formation parameters by firing, using at least one transmitter in each of a horizontally and vertically polarized array on opposite sides of a drill collar, signals in the direction of a downhole formation, the fired signals from the transmitters in the arrays being fired simultaneously and engaging the downhole formation. The apparatus and method continues by receiving, using at least one receiver in each of the arrays, signals associated with the fired signals after the fired signals have engaged the downhole formation, where the received signals represent apparent formation data. The apparatus and method further involves determining, using the measured apparent formation data, the true formation data including one or more vertical and horizontal formation parameters.Type: GrantFiled: October 30, 2014Date of Patent: May 17, 2016Assignee: Weatherford Technology Holdings, LLCInventors: Shanjun Li, Jiefu Chen
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Publication number: 20160124106Abstract: An apparatus and method for simultaneously obtaining quantitative measurements of vertical and horizontal resistivity and permittivity formation parameters by firing, using at least one transmitter in each of a horizontally and vertically polarized array on opposite sides of a drill collar, signals in the direction of a downhole formation, the fired signals from the transmitters in the arrays being fired simultaneously and engaging the downhole formation. The apparatus and method continues by receiving, using at least one receiver in each of the arrays, signals associated with the fired signals after the fired signals have engaged the downhole formation, where the received signals represent apparent formation data. The apparatus and method further involves determining, using the measured apparent formation data, the true formation data including one or more vertical and horizontal formation parameters.Type: ApplicationFiled: October 30, 2014Publication date: May 5, 2016Inventors: Shanjun Li, Jiefu Chen
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Publication number: 20160054467Abstract: Improved algorithm for estimating anisotropic formation resistivity profile using a multi-component induction tool are disclosed. A method for estimating anisotropic formation resistivity profile of a formation comprises obtaining borehole corrected log data and determining at an azimuth angle of the formation. One or more formation bed boundaries are located and initial formation properties are calculated. One of a plurality of inversion windows is sequentially selected and a one-dimensional inversion of each of the sequentially selected one of the plurality of inversion windows is performed.Type: ApplicationFiled: July 13, 2012Publication date: February 25, 2016Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Shanjun Li, Dagang Wu, Luis E. San Martin, Yumei Tang
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Patent number: 9239402Abstract: Various embodiments include apparatus and methods to make resistivity measurements in a borehole using tool having an array of electrodes operable to provide focused currents and measure corresponding voltages to determine resistivity. Tools can be configured with a main electrode having a number of spaced apart electrodes within the main electrode such that the spaced apart electrodes are arranged azimuthally with respect to an axis of the tool. Generation of current from the spaced apart electrodes and control of current from additional electrodes on each side of the main electrode can provide for focused measurements. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: January 3, 2012Date of Patent: January 19, 2016Assignee: Halliburton Energy Services, Inc.Inventors: Shanjun Li, Michael S. Bittar
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Publication number: 20150355368Abstract: Methods and systems for characterizing a formation are disclosed. A tool is placed in the formation. The tool comprises a perpendicular antenna set and a parallel antenna set. The perpendicular antenna set comprises at least one transmitter antenna oriented perpendicular to at least one receiver antenna and the parallel antenna set comprises at least one transmitter antenna oriented parallel to at least one receiver antenna. Data is obtained from the tool and used to determine a compensated geosignal for each of the perpendicular antenna set and the parallel antenna set. The determined compensated geosignal is used to characterize the formation.Type: ApplicationFiled: January 7, 2015Publication date: December 10, 2015Inventors: Shanjun Li, Hsu-Hsiang Wu, Michael Bittar
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Patent number: 9115569Abstract: Methods and apparatus for detecting nearby conductors such as pipes, well casing, etc., from within a borehole. A nearby casing string can be detected by transmitting an electromagnetic signal from a transmit antenna on a downhole logging tool and measuring a parallel response signal with a first receive antenna parallel to the transmit antenna and a perpendicular response signal with a second receive antenna perpendicular to the transmit antenna, both receive antennas on the downhole logging tool. As the tool rotates, the transmitting and measuring are repeated to determine the azimuthal dependence of the parallel and perpendicular response signals. The azimuthal dependence is analyzed to determine a diagonal component of said azimuthal dependence for each response signal. Distance to a casing string can be estimated using the diagonal component of each response signal. At least one of the antennas is preferably tilted.Type: GrantFiled: July 16, 2012Date of Patent: August 25, 2015Assignee: HALLIBURTON ENERGY SERVICES, INC.Inventors: Yumei Tang, Michael S. Bittar, Shanjun Li
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Publication number: 20150219741Abstract: Various embodiments include methods and apparatus structured to balance electrode pairs (112, 312) of a tool (105, 305) providing voltage equivalence between the electrode pairs. An electrically conductive wire (113, 313) coupling the electrodes of an electrode pair can be arranged such that resistance of the electrically conductive wire does not adversely affect the voltage equivalence. The electrically conductive wire can also be structured to provide temperature independent balancing by arranging the electrically conductive wire with respect to a measuring node (116, 316). Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: July 13, 2012Publication date: August 6, 2015Applicant: Halliburton Energy Services, Inc.Inventors: Luis Emilio San Martin, Shanjun Li, Burkay Donderici, Wesley N. Ludwig
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Patent number: 9081114Abstract: Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. At least some of the guard electrodes are positioned between component electrodes of associated split monitor electrodes that enable more accurate measurement of the guard electrode potential. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means.Type: GrantFiled: July 13, 2012Date of Patent: July 14, 2015Assignee: HALLIBURTON ENERGY SERVICES, INC.Inventors: Xiaochun Nie, Shanjun Li, Burkay Donderici, Luis E. San Martin
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Publication number: 20150185353Abstract: A system and method for improving the accuracy of galvanic tool measurements is described. The system (300) may include a survey electrode (A0) and a first monitor electrode (M1?) positioned above the survey electrode. A second monitor electrode (M1) may be positioned below the survey electrode, and a first conductive wire (307) may couple the first monitor electrode to the second monitor electrode. A first measurement point (302) may be located on the conductive wire, and a first resistive element (Rm1) may be coupled to the conductive wire.Type: ApplicationFiled: July 12, 2012Publication date: July 2, 2015Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Shanjun Li, Luis E. San Martin, Burkay Donderici
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Publication number: 20150177406Abstract: Various embodiments include apparatus and methods to make resistivity measurements in a borehole using tool having an array of electrodes operable to provide focused currents, measure corresponding voltages, and measure corresponding voltage differences to determine resistivity. Tools can be configured to operate at a plurality of modes when voltage differences at some frequencies are effectively unreadable. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: July 13, 2012Publication date: June 25, 2015Applicant: Halliburton Energy Services, Inc.Inventors: Shanjun Li, Luis Emilio San Martin, Michael S. Bittar, Jing Li
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Publication number: 20150134254Abstract: Various embodiments include apparatus and methods to make resistivity measurements in a borehole using tool having an array of electrodes operable to provide focused currents and measure corresponding voltages to determine resistivity. Tools can be configured with a main electrode having a number of spaced apart electrodes within the main electrode such that the spaced apart electrodes are arranged azimuthally with respect to an axis of the tool. Generation of current from the spaced apart electrodes and control of current from additional electrodes on each side of the main electrode can provide for focused measurements. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: January 3, 2012Publication date: May 14, 2015Applicant: Halliburton Energy Services, Inc.Inventors: Shanjun Li, Michael S. Bittar
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Patent number: 9002649Abstract: Various resistivity logging tools, systems, and methods are disclosed. At least some tool embodiments include transmit and receive antennas that measure the electromagnetic response of the formation, at least one of which is tilted to provide a directional sensitivity. A processor converts the response (measured as a function of the tool's rotation angle) into a set of inversion parameters, which are then used to estimate the anisotropic properties of the formation. The set of inversion parameters includes at least one parameter based on an antipodal sum of the response signal, and may further include parameters based on an antipodal difference and an average of the signal response. Antipodal sum and difference values at different rotational orientations can be included in the set of inversion parameters, and they may be normalized to reduce environmental effects. Some tool embodiments collect the relevant formation measurements using parallel or perpendicular tilted antennas.Type: GrantFiled: July 16, 2010Date of Patent: April 7, 2015Assignee: Halliburton Energy Services, Inc.Inventors: Michael S. Bittar, Yumei Tang, Shanjun Li
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Patent number: 8954280Abstract: Methods and systems for characterizing a formation are disclosed. A tool is placed in the formation. The tool comprises a perpendicular antenna set and a parallel antenna set. The perpendicular antenna set comprises at least one transmitter antenna oriented perpendicular to at least one receiver antenna and the parallel antenna set comprises at least one transmitter antenna oriented parallel to at least one receiver antenna. Data is obtained from the tool and used to determine a compensated geosignal for each of the perpendicular antenna set and the parallel antenna set. The determined compensated geosignal is used to characterize the formation.Type: GrantFiled: May 5, 2011Date of Patent: February 10, 2015Assignee: Halliburton Energy Services, Inc.Inventors: Shanjun Li, Hsu-Hsiang Wu, Michael Bittar
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Patent number: 8947095Abstract: Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means. This novel arrangement of currents provides a complete set of measurements that enables one tool to simultaneously emulate a whole range of laterolog tools.Type: GrantFiled: November 15, 2010Date of Patent: February 3, 2015Assignee: Halliburton Energy Services, Inc.Inventors: Michael S. Bittar, Shanjun Li, Jing Li
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Publication number: 20140306710Abstract: Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. At least some of the guard electrodes are positioned between component electrodes of associated split monitor electrodes that enable more accurate measurement of the guard electrode potential. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means.Type: ApplicationFiled: July 13, 2012Publication date: October 16, 2014Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Xiaochun Nie, Shanjun Li, Burkay Donderici, Luis E. San Martin
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Patent number: 8844648Abstract: Nearby conductors such as pipes, well casing, etc., are detectable from within a borehole filled with an oil-based fluid. At least some method embodiments provide a current flow between axially-spaced conductive bridges on a drillstring. The current flow disperses into the surrounding formation and causes a secondary current flow in the nearby conductor. The magnetic field from the secondary current flow can be detected using one or more azimuthally-sensitive antennas. Direction and distance estimates are obtainable from the azimuthally-sensitive measurements, and can be used as the basis for steering the drillstring relative to the distant conductor. Possible techniques for providing current flow in the drillstring include imposing a voltage across an insulated gap or using a toroid around the drillstring to induce the current flow.Type: GrantFiled: May 26, 2011Date of Patent: September 30, 2014Assignee: Halliburton Energy Services, Inc.Inventors: Michael S. Bittar, Jing Li, Shanjun Li, Michael D. Finke
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Publication number: 20140244174Abstract: Various embodiments include apparatus and methods to detect and locate conductive structures below the earth's surface. Tools can be configured with receiving sensors arranged to receive signals generated from a conductive structure in response to a current flowing on the conductive structure. Magnetic-related values from the signals can be processed, relative to the tool, to determine a position of a conductive structure from which the signal was generated in response to current flowing on the conductive structure. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: November 18, 2011Publication date: August 28, 2014Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Shanjun Li, Michael S. Bittar, Dagang Wu
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Publication number: 20140188391Abstract: Various embodiments include apparatus and methods to detect and locate conductive structures below the earth's surface. Tools can be configured with receiving sensors arranged to receive signals generated from a conductive structure in response to a current flowing on the conductive structure. Magnetic-related values from the signals can be processed, relative to the tool, to determine a position of a conductive structure from which the signal was generated in response to current flowing on the conductive structure. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: March 4, 2014Publication date: July 3, 2014Applicant: Halliburton Energy Services, Inc.Inventors: Shanjun Li, Michael S. Bittar, Dagang Wu