Patents by Inventor Dipen N. Sinha

Dipen N. Sinha 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).

  • Publication number: 20210096109
    Abstract: Described are an apparatus, computer program product, and associated methods for shaped waveform acoustic interrogation of substances and materials to determine one or more properties of the materials or substances. In some embodiments, a shaped waveform is formed by summing two or more different waveforms and an acoustic wave is generated according to the shaped waveform. The acoustic wave is transmitted by one or more transmitting transducers through the substance or material and received by one or more receiving transducers. The shaped waveform acoustic wave can have a duration or a period that is less than about 20 ?s and can comprise predetermined frequency content. Characteristics of the shaped waveform acoustic wave, as received at the receiving transducer(s), including characteristics such as amplitude, frequency, time of flight, etc., can be associated with said one or more properties of the substance or material to provide for real-time monitoring of these properties.
    Type: Application
    Filed: September 28, 2020
    Publication date: April 1, 2021
    Inventors: Dipen N. SINHA, Cristian PANTEA
  • Patent number: 10908131
    Abstract: Apparatus and methods for the measurement of gas volume fraction of produced oil are described. A first method measures the response of a pipe containing the produced oil excited by a source of vibration in the form of an acoustic frequency chirp containing a linearly varying range of frequencies in the tens of kilohertz range encompassing at least one resonant mode of the pipe. As the gas volume fraction increases, the location of the peak maximum of the measured frequency spectrum responsive to the excitation increases in frequency, and the height of the peak maximum increases, thereby permitting a linear calibration curve to be obtained. A second method measures the response of a pipe containing the produced oil to excitation by a continuous source of vibration having a chosen frequency above those which excite flexural vibrations in the pipe and simultaneously excite acoustic waves in the fluid contained in the pipe, known as the coincidence frequency.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: February 2, 2021
    Assignee: TRIAD NATIONAL SECURITY, LLC
    Inventors: Dipen N. Sinha, Anirban Chaudhuri, Cristian Pantea
  • Patent number: 10887682
    Abstract: Acoustic signal sources include acoustic resonators that include acoustic nonlinear materials. Acoustic signals at higher frequencies are mixed in the nonlinear materials to produce a lower frequency acoustic signal. Resonance provides increased efficiency in producing acoustic signals at difference frequencies corresponding to resonance frequencies. Higher frequency acoustic signals used in nonlinear mixing are preferably at frequencies corresponding to resonance frequencies as well.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: January 5, 2021
    Assignee: Triad National Security, LLC
    Inventors: Cristian Pantea, Dipen N. Sinha
  • Patent number: 10830735
    Abstract: Apparatus (10) and methods for making simultaneous measurements of composition (water-cut), fluid flow, and sound attenuation in a multiphase fluid flowing (15) through a pipe (12) in real-time, using the same apparatus (10) are described. Additionally, the apparatus (10) provides real-time pipe wall thickness monitoring for observing pipe corrosion or internal deposition. Knowledge of wall thickness is necessary to correct for water-cut (oil-water composition) automatically by adjusting the liquid path length internal to the pipe (spool). The use of short duration frequency chirp excitation signals (24) enables the apparatus to provide information that can be used to extract multiple levels of information from the same measurement in multiphase fluids including the presence of a significant quantity of gas (˜60% gas volume fraction) in different flow regimes. Besides measuring steady flow, this device is useful for measurements during fast changing flows, such as for a rod-pumped well.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: November 10, 2020
    Assignee: Triad National Security, LLC
    Inventors: Dipen N. Sinha, Anirban Chaudhuri
  • Publication number: 20200326312
    Abstract: Apparatus for performing multiple different measurements on a small specimen sample, enabling testing and diagnoses in real time at the point of care are described. The core of the apparatus includes an ultrasonic resonator cavity where acoustic resonances are used to determine the speed of sound and sound attenuation in a single droplet. Acoustic measurements are made in the reflection mode using electrical impedance of a small piezoelectric crystal transducer that operates in the thickness longitudinal mode. Combination of this technology with electromagnetic, electrical, and magnetic fields permits multiple types of measurements to be made using the same resonator cavity.
    Type: Application
    Filed: April 8, 2020
    Publication date: October 15, 2020
    Applicant: AWE Technologies, LLC
    Inventors: Dipen N. Sinha, Peter G. Espina
  • Patent number: 10794865
    Abstract: An apparatus and method for the separation of an oil-water mixture into its components are described. An acoustic radiation force moves oil droplets to the nodes of an acoustic standing wave generated in a vertical column containing the oil-water mixture. Once the droplets are sufficiently close together, attractive forces become dominant and the droplets may coalesce to form larger droplets, which have greater buoyancy, and separation of the mixture into a layer of oil and a layer of water occurs, not possible by simple gravitational separation. Acoustically-driven oil-water separation may be used for water-cut measurements in oil production wells, since separation of the oil from the water permits accurate sound speed measurements to be made for both the oil and the water, thereby allowing frequent in situ calibrations of the apparatus to determine whether sound speed measurements on the mixture are accurate in the event that one or both of the mixture constituents is changing.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: October 6, 2020
    Assignee: Triad National Security, LLC
    Inventors: Dipen N. Sinha, Cristian Pantea
  • Patent number: 10697938
    Abstract: A measurement system and a method for determining steam quality (i.e. vapor mass fraction) measurements of multiphase fluid flowing through pipes are described. An acoustic sensor device consists of an acoustic transmitter and an acoustic receiver that are designed to be attached to a pipe. The acoustic transmitter and the acoustic receiver are exposed to an interior space of the pipe through openings in a wall of the pipe. Acoustic waves generated by the transmitter and captured by the receiver traverse the multiphase fluid flowing into the pipe. Swept-frequency acoustic interferometry (SFAI) technique is used to measure ultrasonic acoustic properties of a fluid. Machine-learning techniques based on principal component analysis, support vector machine regression and support vector machine classification are used for determining steam quality.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: June 30, 2020
    Assignees: Triad National Security, LLC, Chevron U.S.A. Inc.
    Inventors: Alessandro Cattaneo, Dipen N. Sinha, Todd Andrew Jankowski, James Schrodt
  • Patent number: 10605640
    Abstract: An apparatus and method for real-time visualization of particulate matter suspended in a static or flowing fluid and fluid flow patterns in a pipe, tube, conduit, or other container, are described. Ultrasonic scanning and detection of scattered sound from the particles in the fluid create a real-time image of the particles, or of flow patterns in the liquid. A mechanical wobbler directs a piezoelectric transducer over a chosen angle in an oscillatory manner. The transducer is operated in a pulse-echo mode wherein the same transducer detects the return signal from the target region through which particles are passing and/or a flow is present. The pulse-echo measurements are made rapidly and continuously during a single sweep of the transducer over the chosen angle. Received signals are processed in the ultrasound scanner electronics module and displayed as an image in real-time.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: March 31, 2020
    Assignee: Triad National Security, LLC
    Inventors: Dipen N. Sinha, Curtis F. Osterhoudt, Cristian Pantea
  • Publication number: 20200096484
    Abstract: A measurement system and a method for determining steam quality (i.e. vapor mass fraction) measurements of multi-phase fluid flowing through pipes are described. An acoustic sensor device consists of an acoustic transmitter and an acoustic receiver that are designed to be attached to a pipe. The acoustic transmitter and the acoustic receiver are exposed to an interior space of the pipe through openings in a wall of the pipe. Acoustic waves generated by the transmitter and captured by the receiver traverse the multi-phase fluid flowing into the pipe. Swept-frequency acoustic interferometry (SFAI) technique is used to measure ultrasonic acoustic properties of a fluid. Machine-learning techniques based on principal component analysis, support vector machine regression and support vector machine classification are used for determining steam quality.
    Type: Application
    Filed: March 15, 2018
    Publication date: March 26, 2020
    Inventors: Alessandro CATTANEO, Dipen N. Sinha, Todd Andrew JANKOWSKI, James SCHRODT
  • Publication number: 20200088686
    Abstract: Apparatus (10) and methods for making simultaneous measurements of composition (water-cut), fluid flow, and sound attenuation in a multiphase fluid flowing (15) through a pipe (12) in real-time, using the same apparatus (10) are described. Additionally, the apparatus (10) provides real-time pipe wall thickness monitoring for observing pipe corrosion or internal deposition. Knowledge of wall thickness is necessary to correct for water-cut (oil-water composition) automatically by adjusting the liquid path length internal to the pipe (spool). The use of short duration frequency chirp excitation signals (24) enables the apparatus to provide information that can be used to extract multiple levels of information from the same measurement in multiphase fluids including the presence of a significant quantity of gas (˜60% gas volume fraction) in different flow regimes. Besides measuring steady flow, this device is useful for measurements during fast changing flows, such as for a rod-pumped well.
    Type: Application
    Filed: March 20, 2018
    Publication date: March 19, 2020
    Inventors: Dipen N. Sinha, Anirban Chaudhuri
  • Patent number: 10585069
    Abstract: Methods for detection, monitoring, and determination of location of changes in rigid structures with arbitrarily complex geometries are described. Implementations include locating acoustic transducers that generate and receive acoustic signals at multiple locations along a surface of the rigid structure, wherein longitudinal spacing between the transducer locations define measurement zones. Acoustic signals with chosen amplitude-time-frequency characteristics excite multiple vibration modes in the structure within each zone. Small mechanical changes in the inspection zones lead to scattering and attenuation of broadband acoustic signals, which are detectable as changes in received signal characteristics as part of a through-transmission technique. Additional use of short, narrowband pulse acoustic signals as part of a pulse-echo technique allows determination of the relative location of the mechanical change within each zone based on the differential delay profiles.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: March 10, 2020
    Assignees: Chevron U.S.A. Inc., Triad National Security, LLC
    Inventors: Alp T. Findikoglu, Dipen N. Sinha, Daniel R. Chapman
  • Patent number: 10488286
    Abstract: A system, method and device for interrogating a downhole environment in a borehole beneath a surface includes a source of electromagnetic energy, operable to transmit an electromagnetic signal in the borehole, a sensor module, including a passive resonating circuit including a crystal oscillator having a resonant frequency that varies with changes in the condition in the downhole environment to reflect the electromagnetic signal and to modulate the electromagnetic signal in response to a condition in the downhole environment in the borehole and a detector positionable to receive the reflected modulated electromagnetic signal.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: November 26, 2019
    Assignees: CHEVRON U.S.A. INC., LOS ALAMOS NATIONAL SECURITY LLC
    Inventors: M. Clark Thompson, Dipen N. Sinha, Don M. Coates, Jacobo R. Archuletta, Manuel E. Gonzalez
  • Patent number: 10473625
    Abstract: Methods for detecting and monitoring changes in mechanical structures and in walls of pipes, vessels and storage tanks, using muitimode acoustic signal propagation and detection, are described. Acoustic signals having chosen amplitude-time-frequency characteristics excite multiple modes in the structure under investigation, are generated and received at a small number of accessible locations, such as the ends of pipes and the tops and bottoms of vessels and storage tanks, with the inspection region between transmit and receive transducers. Small mechanical changes lead to acoustic scattering and attenuation among the various modes, which are detectable as changes in received signal intensity. Such changes may include material loss, material conversion and material addition. Once the structure is characterized in a known condition, the present method may be used to monitor the structure at a later time to determine whether changes have taken place.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: November 12, 2019
    Assignees: Chevron U.S.A. Inc., Triad National Security, LLC
    Inventors: Alp T. Findikoglu, Dipen N. Sinha, Daniel R. Chapman
  • Publication number: 20190242851
    Abstract: Methods for noninvasive determination of acoustical properties of flowing in pipes having a large ratio (>10) of pipe diameter to wall thickness, and in highly attenuating fluids are described. When vibrations are excited on the outer surface of the wall of a pipe, the resulting vibrations propagate directly through the wall In a normal direction and through the pipe wall as guided waves, appearing on the opposite side of the pipe. This dual path propagation through pipes, where guided waves take the circumferential path in the wall of the pipe and may interfere with the time of-flight measurement obtained from the direct path through the fluid, is at least In part resolved by subtracting the signal from the guided wave from the combined signal, thereby permitting improved observation of the direct path propagation through the fluid.
    Type: Application
    Filed: July 20, 2017
    Publication date: August 8, 2019
    Inventors: Dipen N. Sinha, Cristian Pantea, Blake T. Sturtevant, Anirban Chaudhuri
  • Patent number: 10352907
    Abstract: A compact, rugged and portable measurement cell design for the determination of sound speed in fluids at temperatures up to 250° C. and pressures up to 3,000 psi is described. Swept Frequency Acoustic Interferometry measurement for liquid sound speed determinations in liquids up to 250° C. is of both fundamental interest, as in the case of basic equations of state, and applied interest, such as for characterizing geothermal or petroleum down hole environments. Representative sound speeds for water, as a function of temperature and pressure, are in agreement with an internationally accepted standard for the sound speed of water.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: July 16, 2019
    Assignee: Los Alamos National Security, LLC
    Inventors: Blake T. Sturtevant, Cristian Pantea, Dipen N. Sinha
  • Patent number: 10331025
    Abstract: The present invention is a method and an apparatus that can image objects immersed in optically opaque fluids using ultrasound in a confined space and in a harsh environment. If the fluid is not highly attenuating at frequencies above 1 MHz, where commercial ultrasound scanners are available, such scanners can be adapted for imaging in these fluids. In the case of highly attenuating fluids, such as drilling mud, then a low frequency collimated sound source is used.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: June 25, 2019
    Assignee: Los Alamos National Security, LLC
    Inventors: Dipen N. Sinha, Curtis F. Osterhoudt, Cristian Pantea
  • Patent number: 10309932
    Abstract: An apparatus and method for noninvasively monitoring steam quality and flow and in pipes or conduits bearing flowing steam, are described. By measuring the acoustic vibrations generated in steam-carrying conduits by the flowing steam either by direct contact with the pipe or remotely thereto, converting the measured acoustic vibrations into a frequency spectrum characteristic of the natural resonance vibrations of the pipe, and monitoring the amplitude and/or the frequency of one or more chosen resonance frequencies, changes in the steam quality in the pipe are determined. The steam flow rate and the steam quality are inversely related, and changes in the steam flow rate are calculated from changes in the steam quality once suitable calibration curves are obtained.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: June 4, 2019
    Assignee: Los Alamos National Security, LLC
    Inventors: Dipen N. Sinha, Cristian Pantea
  • Patent number: 10124311
    Abstract: Apparatus and methods for using acoustic radiation forces to order particles suspended in a host liquid are described. The particles may range in size from nanometers to millimeters, and may have any shape. The suspension is placed in an acoustic resonator cavity, and acoustical energy is supplied thereto using acoustic transducers. The resulting pattern may be fixed by using a solidifiable host liquid, forming thereby a solid material. Patterns may be quickly generated; typical times ranging from a few seconds to a few minutes. In a one-dimensional arrangement, parallel layers of particles are formed. With two and three dimensional transducer arrangements, more complex particle configurations are possible since different standing-wave patterns may be generated in the resonator.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: November 13, 2018
    Assignee: Los Alamos National Security, LLC
    Inventors: Naveen N. Sinha, Dipen N. Sinha, Greg R. Goddard
  • Publication number: 20180292356
    Abstract: Methods for detection, monitoring, and determination of location of changes in rigid structures with arbitrarily complex geometries are described. Implementations include locating acoustic transducers that generate and receive acoustic signals at multiple locations along a surface of the rigid structure, wherein longitudinal spacing between the transducer locations define measurement zones. Acoustic signals with chosen amplitude-time-frequency characteristics excite multiple vibration modes in the structure within each zone. Small mechanical changes in the inspection zones lead to scattering and attenuation of broadband acoustic signals, which are detectable as changes in received signal characteristics as part of a through-transmission technique. Additional use of short, narrowband pulse acoustic signals as part of a pulse-echo technique allows determination of the relative location of the mechanical change within each zone based on the differential delay profiles.
    Type: Application
    Filed: April 27, 2018
    Publication date: October 11, 2018
    Inventors: Alp T. Findikoglu, Dipen N. Sinha, Daniel R. Chapman
  • Patent number: 10088590
    Abstract: Methods for real-time, continuous measurements of the composition and other properties of individual phases of petroleum, water and gas mixtures during the oil production process, without requiring test separators, test lines, with associated valving and instrumentation, are described. Embodiments of the present invention direct ultrasonic sound transmission through a flowing multiphase fluid in three frequency ranges: low frequencies, gas bubble resonance frequencies, and high frequencies, wherein certain sound propagation measurements, including sound speed, sound attenuation and sound scattering, are made in one or more of the three separate frequency regions, from which the multiphase composition and other properties are extracted without having to separate the multiphase fluid or the gas from the flowing stream.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: October 2, 2018
    Assignee: Los Alamos National Security, LLC
    Inventors: Dipen N. Sinha, Anirban Chaudhuri, Cristian Pantea