Patents by Inventor Tasneem A. MANDVIWALA
Tasneem A. MANDVIWALA 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: 9864095Abstract: Multiplexed microvolt sensor systems and methods are described. An example system may include a pulsed light source, a first optical waveguide segment operatively coupled to the pulsed light source, an optical circulator including a first port, a second port, and a third port, the first port being operatively coupled to the first optical waveguide segment, a second optical waveguide segment operatively coupled to the second port of the optical circulator, and an array of sensor elements. Each of the sensor elements may include a detector and an electro-optical modulator, the electro-optical modulator being operatively coupled to the second optical waveguide segment.Type: GrantFiled: June 17, 2015Date of Patent: January 9, 2018Assignee: Halliburton Energy Services, Inc.Inventors: Han-Sun Choi, Tasneem A. Mandviwala, David Andrew Barfoot
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Publication number: 20170336525Abstract: A through-casing formation monitoring system may include a casing string positioned within a wellbore, a power source electrically coupled to a first transmitter configured to produce a magnetic field, a magnetic induction sensor positioned within the casing string such that the magnetic induction sensor allows a continued operation of the wellbore, a fiber optic cable coupled to an electro-optical transducer within the magnetic induction sensor, and an optical interrogation system configured to receive measurements from the magnetic induction sensor via the fiber optic cable.Type: ApplicationFiled: December 30, 2014Publication date: November 23, 2017Inventors: Glenn Andrew Wilson, Ahmed Elsayed Fouda, Burkay Donderici, Tasneem A. Mandviwala
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Publication number: 20170254191Abstract: A method of monitoring a substance in a well can include disposing at least one optical electromagnetic sensor and at least one electromagnetic transmitter in the well, and inducing strain in the sensor, the strain being indicative of an electromagnetic parameter of the substance in an annulus between a casing and a wellbore of the well. A system for monitoring a substance in a well can include at least one electromagnetic transmitter, and at least one optical electromagnetic sensor with an optical waveguide extending along a wellbore to a remote location, the sensor being positioned external to a casing in the wellbore.Type: ApplicationFiled: October 17, 2014Publication date: September 7, 2017Applicant: Halliburton Energy Services, Inc.Inventors: David A. Barfoot, Peter J. Boul, Tasneem A. Mandviwala, Leonardo de Oliveira Nunes
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Publication number: 20170248731Abstract: An electric field sensing system, in some embodiments, comprises a magnetic shield, an optical magnetometer shielded from external magnetic fields by the magnetic shield, a conductive coil proximate to the optical magnetometer, and first and second electrodes coupled to opposite ends of the coil. The electrodes are disposed outside of the magnetic shield. The conductive coil generates a magnetic field within the optical magnetometer when electrical current passes through the conductive coil.Type: ApplicationFiled: October 17, 2014Publication date: August 31, 2017Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Satyan Gopal Bhongale, Tasneem Mandviwala, Etienne Samson
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Patent number: 9733381Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may operate to acquire a monitoring output from a first distributed feedback (DFB) fiber laser sensor at least partially bonded to a piezoelectric portion of a downhole device, to demodulate the monitoring output to determine a frequency shift in a lasing frequency of the DFB fiber laser sensor, and to correlate the frequency shift to a measure of magnetic field strength to determine a strength of a downhole magnetic field. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: August 2, 2013Date of Patent: August 15, 2017Assignee: Halliburton Energy Services, Inc.Inventor: Tasneem A. Mandviwala
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Publication number: 20170218752Abstract: A method of monitoring electromagnetic properties of a sub-surface formation may include: obtaining a resistivity distribution in the subsurface formation; identifying sensor positions along a borehole; determining an effective resistivity of each region around a sensor position; deriving from the effective resistivities of regions associated with each sensor position an optimum resonance frequency; tuning an array of sensors to provide each sensor with the optimum resonance frequency; deploying the sensor array in the borehole; and collecting electromagnetic field measurements. Each sensor may include: a coil antenna positioned in a subsurface formation having a resistivity, the coil antenna generating a induced voltage signal from an electromagnetic field in the subsurface formation; and a resonant modulation circuit that converts the induced voltage signal into a telemetry signal, the resonant modulation circuit having a resonance frequency optimized for said formation resistivity.Type: ApplicationFiled: July 22, 2015Publication date: August 3, 2017Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Burkay Donderici, Luis E. San Martin, Tasneem A. Mandviwala
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Publication number: 20170146685Abstract: Multiplexed microvolt sensor systems and methods are described. An example system may include a pulsed light source, a first optical waveguide segment operatively coupled to the pulsed light source, an optical circulator including a first port, a second port, and a third port, the first port being operatively coupled to the first optical waveguide segment, a second optical waveguide segment operatively coupled to the second port of the optical circulator, and an array of sensor elements. Each of the sensor elements may include a detector and an electro-optical modulator, the electro-optical modulator being operatively coupled to the second optical waveguide segment.Type: ApplicationFiled: June 17, 2015Publication date: May 25, 2017Applicant: Halliburton Energy Services, Inc.Inventors: Han-Sun Choi, Tasneem A. Mandviwala, David Andrew Barfoot
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Patent number: 9651706Abstract: A method of sensing electromagnetic (EM) fields downhole may include filtering a voltage signal induced in a coil antenna by an EM field to produce a filtered signal, said filtering being performed by a resonance tuning filter, and applying the filtered signal to a piezoelectric element to modify a strain of an optical fiber. A sensing system may include a cable deployed downhole and coupled to an interface unit. The cable has an optical fiber coupled to an array of downhole sensors, each sensor having a coil antenna coupled by a resonance tuning filter to a piezoelectric element that modifies a strain in the optical fiber in accordance with a signal induced in the coil antenna by an electromagnetic field. The interface unit measures a backscattered light to monitor the signal from each sensor in the array.Type: GrantFiled: May 14, 2015Date of Patent: May 16, 2017Assignee: Halliburton Energy Services, Inc.Inventors: Tasneem A. Mandviwala, Matthew Chase Griffing
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Publication number: 20170123096Abstract: Electromagnetic (EM) measurement systems and methods for a downhole environment are described herein. An example system includes an optical fiber, an EM source to emit an EM field, and a magnetic induction sensor. The magnetic induction sensor comprises a coil and an electro-optical transducer coupled to the coil and the optical fiber. The electro-optical transducer generates a light beam or modulates a source light beam in the optical fiber in accordance with a voltage induced in the coil by the EM field. An example method includes positioning an optical fiber and magnetic induction sensor in the downhole environment, the magnetic induction sensor having a coil and an electro-optical transducer coupled to the coil and the optical fiber. The method also includes emitting an EM field and generating a light beam or modulating a source light beam, by the electro-optical transducer, in the optical fiber in accordance with a voltage induced in the coil by the EM field.Type: ApplicationFiled: May 19, 2014Publication date: May 4, 2017Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Glenn A. Wilson, Tasneem A. Mandviwala, Burkay Donderici, Ahmed Fouda, Etienne Samson
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Patent number: 9606258Abstract: A method of monitoring a flood front. The method may comprise installing at least one optical electromagnetic sensor in a wellbore which penetrates an earth formation. The sensor may be a part of an interferometer selected from the group consisting of a Mach Zehnder interferometer and a Michelson interferometer. The method may further comprise inducing an electromagnetic field in the earth formation. A first optical path length in a first optical waveguide of the sensor may increases in response to exposure to the electromagnetic field, and a second optical path length in a second optical waveguide of the sensor may decreases in response to exposure to the electromagnetic field. Additionally, the method may comprise monitoring the flood front by detecting via the sensor the electromagnetic field in the earth formation as the flood front progresses through the earth formation.Type: GrantFiled: August 31, 2015Date of Patent: March 28, 2017Assignee: Halliburton Energy Services, Inc.Inventors: Mikko Jaaskelainen, Tasneem A. Mandviwala
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Publication number: 20170082770Abstract: A magnetic field sensor unit for a downhole environment includes an optical fiber, a magnetic field sensor, and an optical transducer. The sensor unit also includes a sealed housing that encloses the magnetic field sensor and the optical transducer. The optical transducer is configured to generate a light beam or to modulate a source light beam in the optical fiber in response to a magnetic field sensed by the magnetic field sensor. Related magnetic field measurement methods and systems deploy one or more of such magnetic field sensor units in a downhole environment to obtain magnetic field measurements due to an emitted electromagnetic field.Type: ApplicationFiled: May 19, 2014Publication date: March 23, 2017Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Tasneem A. Mandviwala, Glenn A. Wilson, Ahmed Fouda, Burkay Donderici, Etienne Samson
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Patent number: 9575209Abstract: A system includes a light source and a nonlinear converter optically coupled to and remote from the light source. The nonlinear light converter converts a light pulse received from the light source to a broadened or spectrum-shifted light pulse. The system also includes a sensor in situ with the nonlinear light converter. The sensor performs a sense operation based on the broadened or spectrum-shifted light pulse and generates an electrical signal corresponding to the sense operation. The system also includes an electro-optical interface in situ with the sensor that transforms the electrical signal to an optical signal for conveyance to a signal collection interface.Type: GrantFiled: December 22, 2012Date of Patent: February 21, 2017Assignee: HALLIBURTON ENERGY SERVICES, INC.Inventors: Etienne M. Samson, Tasneem A. Mandviwala, Robert P. Freese, David Perkins
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Patent number: 9557439Abstract: Permanent electromagnetic (EM) monitoring of the regions around and between wells may employ a casing string positioned within a borehole through the subsurface formations of interest. At least two passivated electrodes are mounted on the casing string to sense electric fields in the formation. Though only capacitively coupled to the formation, the passivated electrodes nevertheless provide a potential difference to an electro-optical transducer, which in turn modifies a property of the light passing along an optical fiber attached to the casing string. An interface unit senses the modified property to derive a measure of the electric field between each pair of passivated electrodes. The passivated electrodes have a contact surface that is conductive but for one or more layers of non-reactive (and thus electrically insulating) materials. Illustrative materials include metal oxides, polymers and ceramics, but the layers are preferably kept very thin to maximize the coupling capacitance with the formation.Type: GrantFiled: February 28, 2014Date of Patent: January 31, 2017Assignee: HALLIBURTON ENERGY SERVICES, INC.Inventors: Glenn Andrew Wilson, Burkay Donderici, Etienne M. Samson, Tasneem A. Mandviwala, Ahmed Fouda
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Publication number: 20160334534Abstract: A method of sensing electromagnetic (EM) fields downhole may include filtering a voltage signal induced in a coil antenna by an EM field to produce a filtered signal, said filtering being performed by a resonance tuning filter, and applying the filtered signal to a piezoelectric element to modify a strain of an optical fiber. A sensing system may include a cable deployed downhole and coupled to an interface unit. The cable has an optical fiber coupled to an array of downhole sensors, each sensor having a coil antenna coupled by a resonance tuning filter to a piezoelectric element that modifies a strain in the optical fiber in accordance with a signal induced in the coil antenna by an electromagnetic field. The interface unit measures a backscattered light to monitor the signal from each sensor in the array.Type: ApplicationFiled: May 14, 2015Publication date: November 17, 2016Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Tasneem A. Mandviwala, Matthew Chase Griffing
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Publication number: 20160298446Abstract: Method and apparatus are disclosed for use of a fiber-optic sensor loop for use within a wellbore; with a plurality of light sources optically coupled to the fiber-optic sensor loop; at least one electromagnetically sensitized region within the fiber-optic sensor loop; and a plurality of detectors optically coupled to the fiber-optic sensor loop; and using the sensing system to detect changes in a magnetic field within the wellbore.Type: ApplicationFiled: December 20, 2013Publication date: October 13, 2016Inventors: John L. MAIDA, Tasneem A. MANDVIWALA, Allen CEKORICH
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Publication number: 20160274262Abstract: A method and apparatus for magnetic sensing is described. The apparatus includes a strain-sensing fiber coupled to a conducting strip. The strain-sensing fiber may be, for example, a distributed feedback fiber with Bragg gratings. A current may be induced to flow on the conducting strip by electrically coupling a photodiode to the conducting strip and then activating a laser optically coupled to the photodiode. In the presence of a magnetic field, a Lorentz force will be exerted on the conducting strip, causing a displacement of the conducting strip that will induce strain on the strain-sensing fiber. The strain on the strain-sensing fiber may be measured by laser-pumping the strain-sensing fiber and measuring the reflected waves. The measured strain may be used to calculate the magnitude of the magnetic field. Multiple strain-sensing fibers may be optically coupled in series and deployed into a borehole for distributed magnetic field measurements.Type: ApplicationFiled: November 26, 2013Publication date: September 22, 2016Inventors: Tasneem Mandviwala, Han-sun Choi
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Publication number: 20160259085Abstract: Permanent electromagnetic (EM) monitoring of the regions around and between wells may employ a casing string positioned within a borehole through the subsurface formations of interest. At least two passivated electrodes are mounted on the casing string to sense electric fields in the formation. Though only capacitively coupled to the formation, the passivated electrodes nevertheless provide a potential difference to an electro-optical transducer, which in turn modifies a property of the light passing along an optical fiber attached to the casing string. An interface unit senses the modified property to derive a measure of the electric field between each pair of passivated electrodes. The passivated electrodes have a contact surface that is conductive but for one or more layers of non-reactive (and thus electrically insulating) materials. Illustrative materials include metal oxides, polymers and ceramics, but the layers are preferably kept very thin to maximize the coupling capacitance with the formation.Type: ApplicationFiled: February 28, 2014Publication date: September 8, 2016Inventors: Glenn Andrew WILSON, Burkay DONDERICI, Etiene M. SAMSON, Tasneem A. MANDVIWALA, Ahmed FOUDA
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Publication number: 20160139290Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may operate to acquire a monitoring output from a first distributed feedback (DFB) fiber laser sensor at least partially bonded to a piezoelectric portion of a downhole device, to demodulate the monitoring output to determine a frequency shift in a lasing frequency of the DFB fiber laser sensor, and to correlate the frequency shift to a measure of magnetic field strength to determine a strength of a downhole magnetic field. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: August 2, 2013Publication date: May 19, 2016Inventor: Tasneem A. Mandviwala
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Publication number: 20150369954Abstract: A method of measuring an electromagnetic field in a formation can include installing an electromagnetic sensor with improved sensitivity, the sensor including multiple optical waveguides and respective multiple materials, and in response to exposure to the electromagnetic field, the materials changing shape in opposite directions. A well system can include an optical electromagnetic sensor which measures an electromagnetic field in a formation, and wherein optical path lengths or phases in optical waveguides of the sensor change both positively and negatively in response to exposure to the electromagnetic field.Type: ApplicationFiled: August 31, 2015Publication date: December 24, 2015Applicant: Halliburton Energy Services, Inc.Inventors: Mikko Jaaskelainen, Tasneem A. Mandviwala
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Patent number: 9188694Abstract: A method of measuring an electromagnetic field in a formation can include installing an electromagnetic sensor with improved sensitivity, the sensor including multiple optical waveguides and respective multiple materials, and in response to exposure to the electromagnetic field, the materials changing shape in opposite directions. A well system can include an optical electromagnetic sensor which measures an electromagnetic field in a formation, and wherein optical path lengths or phases in optical waveguides of the sensor change both positively and negatively in response to exposure to the electromagnetic field.Type: GrantFiled: November 16, 2012Date of Patent: November 17, 2015Assignee: Halliburton Energy Services, Inc.Inventors: Mikko Jaaskelainen, Tasneem A. Mandviwala