Patents by Inventor Andrei I. Davydychev
Andrei I. Davydychev 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: 10073189Abstract: An inversion based calibration method for downhole electromagnetic tools includes processing an inversion of a formation model using acquired electromagnetic measurement data to obtain formation parameters and calibration parameters for at least one measurement array.Type: GrantFiled: February 15, 2013Date of Patent: September 11, 2018Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Andrei I. Davydychev, Michael Thiel, Dzevat Omeragic, Steve F. Crary
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Publication number: 20150301222Abstract: An inversion based calibration method for downhole electromagnetic tools includes processing an inversion of a formation model using acquired electromagnetic measurement data to obtain formation parameters and calibration parameters for at least one measurement array.Type: ApplicationFiled: February 15, 2013Publication date: October 22, 2015Inventors: Andrei I. Davydychev, Michael Thiel, Dzevat Omeragic, Steve F. Crary
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Publication number: 20150268372Abstract: A logging tool for use in a wellbore is disclosed herein. The logging tool may include a hollow body. Two or more antenna coils may be disposed at least partially within the body and be axially aligned with one another with respect to a longitudinal axis through the body. Each of the two or more antenna coils, in an unrolled view, may have the form of a sinusoidal function that includes a harmonic of order greater than one.Type: ApplicationFiled: March 20, 2014Publication date: September 24, 2015Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: ANDREI I. DAVYDYCHEV, GERALD N. MINERBO
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Patent number: 8862405Abstract: A method and system for producing look-ahead profiles measurements includes positioning an energy transmitter, such as a transmitting antenna, proximate to a borehole assembly tool. One or more energy receivers, such as receiving antennas, are positioned along a length of the borehole assembly. Next, energy is transmitted to produce look-ahead scans relative to the borehole assembly tool. Look-ahead graph data with an x-axis being a function of a time relative to the position of the borehole assembly tool is generated. The look-ahead graph is produced and displayed on a display device. The look-ahead graph may track estimated formation values based on earth models. The estimated formation values are displayed below a tool position history line that is part of the look-ahead graph. The estimated formation values in the look-ahead graph may be based on inversions of resistivity data from the look-ahead scans.Type: GrantFiled: December 6, 2011Date of Patent: October 14, 2014Assignee: Schlumberger Technology CorporationInventors: Jean Seydoux, Andrei I. Davydychev, Denis Heliot, Bennett N. Nicholas
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Patent number: 8794318Abstract: Subsurface formation evaluation comprising, for example, sealing a portion of a wall of a wellbore penetrating the formation, forming a hole through the sealed portion of the wellbore wall, injecting an injection fluid into the formation through the hole, and determining a saturation of the injection fluid in the formation by measuring a property of the formation proximate the hole while maintaining the sealed portion of the wellbore wall.Type: GrantFiled: July 9, 2009Date of Patent: August 5, 2014Assignee: Schlumberger Technology CorporationInventors: Edward Harrigan, Yves Barriol, Andrei I. Davydychev, Andrew J. Carnegie, Dean M. Homan, Srinand Karuppoor, Yi-Qiao Song, Tim Hopper, Henry N. Bachman, William B. Vandermeer, Anthony L. Collins, Mark A. Fredette
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Publication number: 20130144529Abstract: A method and system for producing look-ahead profiles measurements includes positioning an energy transmitter, such as a transmitting antenna, proximate to a borehole assembly tool. One or more energy receivers, such as receiving antennas, are positioned along a length of the borehole assembly. Next, energy is transmitted to produce look-ahead scans relative to the borehole assembly tool. Look-ahead graph data with an x-axis being a function of a time relative to the position of the borehole assembly tool is generated. The look-ahead graph is produced and displayed on a display device. The look-ahead graph may track estimated formation values based on earth models. The estimated formation values are displayed below a tool position history line that is part of the look-ahead graph. The estimated formation values in the look-ahead graph may be based on inversions of resistivity data from the look-ahead scans.Type: ApplicationFiled: December 6, 2011Publication date: June 6, 2013Inventors: Jean Seydoux, Andrei I. Davydychev, Denis Heliot, Bennett N. Nicholas
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Publication number: 20110198078Abstract: Subsurface formation evaluation comprising, for example, sealing a portion of a wall of a wellbore penetrating the formation, forming a hole through the sealed portion of the wellbore wall, injecting an injection fluid into the formation through the hole, and determining a saturation of the injection fluid in the formation by measuring a property of the formation proximate the hole while maintaining the sealed portion of the wellbore wall.Type: ApplicationFiled: July 9, 2009Publication date: August 18, 2011Inventors: Edward Harrigan, Yves BarrioL, Andrei I. Davydychev, Andrew J. Carnegie, Dean M. Homan, Srinand Karuppoor, Yi-Qiao Song, Tim Hopper, Henry N. Bachman, William B. Vandermeer, Anthony L. Collins, Mark A. Fredette
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Patent number: 7812608Abstract: An electromagnetic logging tool is disclosed that includes a support; and at least one four-coil array disposed on the support, wherein the at least one four-coil array comprises: a transmitter, a bucking coil, a receiver, and a trim coil. A method for balancing an induction array is disclosed that includes applying an alternating current to a transmitter of the induction array that comprises the transmitter, a bucking coil and a receiver; measuring a mutual coupling between the transmitter and the receiver; and adding an extra bucking coil, if the mutual coupling exceeds a selected criterion.Type: GrantFiled: September 18, 2009Date of Patent: October 12, 2010Assignee: Schlumberger Technology CorporationInventors: Andrei I. Davydychev, John F. Hunka, Thomas D. Barber, Scott S. Chesser, Bulent Finci, Jingjing Karen Sun, William B. Vandermeer, Richard D. Ward
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Patent number: 7679366Abstract: An electromagnetic logging tool includes a support configured for disposal in a well; at least one antenna mounted on the support; and a plurality of coils mounted on the support proximate the at least one antenna, wherein the plurality of the coils are configured for selective connection with the at least one antenna. A methods for balancing an induction array on an electromagnetic logging tool includes measuring a mutual coupling between a transmitter and a receiver on the electromagnetic logging tool; and selectively connecting a subset of a plurality of coils on the electromagnetic logging tool to the transmitter or the receiver based on the measured mutual coupling.Type: GrantFiled: July 23, 2008Date of Patent: March 16, 2010Assignee: Schlumberger Technology CorporationInventors: Scott S. Chesser, Richard D. Ward, Bulent Finci, Andrei I. Davydychev, William B. Vandermeer, John F. Hunka
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Patent number: 7671597Abstract: A composite encased tool for making subsurface measurements in a borehole traversing a subsurface formation includes a conductive mandrel, a first composite layer wrapped around the conductive mandrel, the first composite layer having one or more slots, a source or sensor disposed in each of the one or more slots, and a second composite layer wrapped around the first composite layer with the source or sensor in the one or more slots.Type: GrantFiled: May 23, 2006Date of Patent: March 2, 2010Assignee: Schlumberger Technology CorporationInventors: Bulent Finci, Scott S. Chesser, Jingjing (Karen) Sun, Denis Lebreton, Richard D. Ward, Andrei I. Davydychev, William B. Vandermeer, John F. Hunka
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Publication number: 20100026280Abstract: An electromagnetic logging tool is disclosed that includes a support; and at least one four-coil array disposed on the support, wherein the at least one four-coil array comprises: a transmitter, a bucking coil, a receiver, and a trim coil. A method for balancing an induction array is disclosed that includes applying an alternating current to a transmitter of the induction array that comprises the transmitter, a bucking coil and a receiver; measuring a mutual coupling between the transmitter and the receiver; and adding an extra bucking coil, if the mutual coupling exceeds a selected criterion.Type: ApplicationFiled: September 18, 2009Publication date: February 4, 2010Applicant: Schlumberger Technology CorporationInventors: Andrei I. Davydychev, John F. Hunka, Thomas D. Barber, Scott S. Chesser, Bulent Finci, Jingling Karen Sun, William B. Vandermeer, Richard D. Ward
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Patent number: 7501829Abstract: An electromagnetic logging that includes a support; and at least one four-coil array disposed on the support, wherein the at least one four-coil array comprises: a transmitter, a bucking coil, a receiver, and a trim coil. A method for balancing an induction array includes applying an alternating current to a transmitter of the induction array that comprises the transmitter, a bucking coil and a receiver; measuring a mutual coupling between the transmitter and the receiver; and adding an extra bucking coil, if the mutual coupling exceeds a selected criterion.Type: GrantFiled: February 16, 2006Date of Patent: March 10, 2009Assignee: Schlumberger Technology CorporationInventors: Andrei I. Davydychev, John F. Hunka, Thomas D. Barber, Scott S. Chesser, Bulent Finci, Jingjing (Karen) Sun, William B. Vandermeer, Richard D. Ward
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Patent number: 7457707Abstract: A method for correcting induction conductivity well log measurements for conductivity of a wellbore and a formation proximate the wellbore includes estimating an effective formation conductivity for the formation proximate the wellbore from measurements made by an induction receiver proximate an induction transmitter. The effective formation conductivity is used to correct apparent conductivity measurements made by at least one induction receiver on the instrument.Type: GrantFiled: November 30, 2006Date of Patent: November 25, 2008Assignee: Schlumberger Technology CorporationInventors: Andrei I. Davydychev, Gerald N. Minerbo
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Publication number: 20080278147Abstract: An electromagnetic logging tool is disclosed that includes a support; and at least one four-coil array disposed on the support, wherein the at least one four-coil array comprises: a transmitter, a bucking coil, a receiver, and a trim coil. A method for balancing an induction array is disclosed that includes applying an alternating current to a transmitter of the induction array that comprises the transmitter, a bucking coil and a receiver; measuring a mutual coupling between the transmitter and the receiver; and adding an extra bucking coil, if the mutual coupling exceeds a selected criterion.Type: ApplicationFiled: July 30, 2008Publication date: November 13, 2008Applicant: Schlumberger Technology CorporationInventors: Andrei I. Davydychev, John F. Hunka, Thomas D. Barber, Scott S. Chesser, Bulent Finci, Jingjing Karen Sun, William B. Vandermeer, Richard D. Ward
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Publication number: 20080278170Abstract: An electromagnetic logging tool includes a support configured for disposal in a well; at least one antenna mounted on the support; and a plurality of coils mounted on the support proximate the at least one antenna, wherein the plurality of the coils are configured for selective connection with the at least one antenna. A methods for balancing an induction array on an electromagnetic logging tool includes measuring a mutual coupling between a transmitter and a receiver on the electromagnetic logging tool; and selectively connecting a subset of a plurality of coils on the electromagnetic logging tool to the transmitter or the receiver based on the measured mutual coupling.Type: ApplicationFiled: July 23, 2008Publication date: November 13, 2008Applicant: Schlumberger Technology CorporationInventors: Scott S. Chesser, Richard D. Ward, Bulent Finci, Andrei I. Davydychev, William B. Vandermeer, John F. Hunka
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Patent number: 7417436Abstract: An electromagnetic logging tool includes a support configured for disposal in a well; at least one antenna mounted on the support; and a plurality of coils mounted on the support proximate the at least one antenna, wherein the plurality of the coils are configured for selective connection with the at least one antenna. A method for balancing an induction array on an electromagnetic logging tool includes measuring a mutual coupling between a transmitter and a receiver on the electromagnetic logging tool; and selectively connecting a subset of a plurality of coils on the electromagnetic logging tool to the transmitter or the receiver based on the measured mutual coupling.Type: GrantFiled: February 16, 2006Date of Patent: August 26, 2008Assignee: Schlumberger Technology CorporationInventors: Scott S. Chesser, Richard D. Ward, Bulent Finci, Andrei I. Davydychev, William B. Vandermeer, John F. Hunka
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Publication number: 20080133138Abstract: A method for correcting induction conductivity well log measurements for conductivity of a wellbore and a formation proximate the wellbore includes estimating an effective formation conductivity for the formation proximate the wellbore from measurements made by an induction receiver proximate an induction transmitter. The effective formation conductivity is used to correct apparent conductivity measurements made by at least one induction receiver on the instrument.Type: ApplicationFiled: November 30, 2006Publication date: June 5, 2008Inventors: Andrei I. Davydychev, Gerald N. Minerbo