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: 20140109684
    Abstract: An apparatus and method for down hole gas separation from the multiphase fluid flowing in a wellbore or a pipe, for determining the quantities of the individual components of the liquid and the flow rate of the liquid, and for remixing the component parts of the fluid after which the gas volume may be measured, without affecting the flow stream, are described. Acoustic radiation force is employed to separate gas from the liquid, thereby permitting measurements to be separately made for these two components; the liquid (oil/water) composition is determined from ultrasonic resonances; and the gas volume is determined from capacitance measurements. Since the fluid flows around and through the component parts of the apparatus, there is little pressure difference, and no protection is required from high pressure differentials.
    Type: Application
    Filed: December 27, 2013
    Publication date: April 24, 2014
    Inventor: Dipen N. Sinha
  • Publication number: 20140056101
    Abstract: A method and system for investigating structure near a borehole are described herein. The method includes generating an acoustic beam by an acoustic source; directing at one or more azimuthal angles the acoustic beam towards a selected location in a vicinity of a borehole; receiving at one or more receivers an acoustic signal, the acoustic signal originating from a reflection or a refraction of the acoustic wave by a material at the selected location; and analyzing the received acoustic signal to characterize features of the material around the borehole.
    Type: Application
    Filed: March 15, 2013
    Publication date: February 27, 2014
    Inventors: Cung Khac VU, Dipen N. SINHA, Cristian PANTEA
  • Publication number: 20140056111
    Abstract: An acoustic detector includes a cylindrical support member and a plurality of receiver elements that are disposed on a surface of the cylindrical support member. The plurality of receiver elements are configured to detect acoustic waves in a plurality of azimuthal angular directions.
    Type: Application
    Filed: March 15, 2013
    Publication date: February 27, 2014
    Inventors: Cung Khac VU, Dipen N. SINHA, Cristian PANTEA
  • Publication number: 20140056110
    Abstract: An acoustic source for generating an acoustic beam includes a housing; a plurality of spaced apart piezo-electric layers disposed within the housing; and a non-linear medium filling between the plurality of layers. Each of the plurality of piezoelectric layers is configured to generate an acoustic wave. The non-linear medium and the plurality of piezo-electric material layers have a matching impedance so as to enhance a transmission of the acoustic wave generated by each of plurality of layers through the remaining plurality of layers.
    Type: Application
    Filed: March 15, 2013
    Publication date: February 27, 2014
    Inventors: Cung Khac VU, Dipen N. SINHA, Cristian PANTEA
  • Publication number: 20140050046
    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: Application
    Filed: October 24, 2013
    Publication date: February 20, 2014
    Inventors: Dipen N. Sinha, Curtis F. Osterhoudt, Cristian Pantea
  • Patent number: 8640529
    Abstract: An apparatus and method for down hole gas separation from the multiphase fluid flowing in a wellbore or a pipe, for determining the quantities of the individual components of the liquid and the flow rate of the liquid, and for remixing the component parts of the fluid after which the gas volume may be measured, without affecting the flow stream, are described. Acoustic radiation force is employed to separate gas from the liquid, thereby permitting measurements to be separately made for these two components; the liquid (oil/water) composition is determined from ultrasonic resonances; and the gas volume is determined from capacitance measurements. Since the fluid flows around and through the component parts of the apparatus, there is little pressure difference, and no protection is required from high pressure differentials.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: February 4, 2014
    Assignee: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Patent number: 8559269
    Abstract: In some aspects of the invention, a method of generating a beam of acoustic energy in a borehole is disclosed. The method includes generating a first acoustic wave at a first frequency; generating a second acoustic wave at a second frequency different than the first frequency, wherein the first acoustic wave and second acoustic wave are generated by at least one transducer carried by a tool located within the borehole; transmitting the first and the second acoustic waves into an acoustically non-linear medium, wherein the composition of the non-linear medium produces a collimated beam by a non-linear mixing of the first and second acoustic waves, wherein the collimated beam has a frequency based upon a difference between the first frequency range and the second frequency, and wherein the non-linear medium has a velocity of sound between 100 m/s and 800 m/s.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: October 15, 2013
    Assignees: Chevron U.S.A., Inc., Los Alamos National Security LLC
    Inventors: Cung Khac Vu, Dipen N. Sinha, Cristian Pantea, Kurt T. Nihei, Denis P. Schmitt, Chirstopher Skelt
  • Patent number: 8547791
    Abstract: In some aspects of the invention, a method of generating a beam of acoustic energy in a borehole is disclosed.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: October 1, 2013
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security LLC
    Inventors: Cung Khac Vu, Dipen N. Sinha, Cristian Pantea, Kurt T. Nihei, Denis P. Schmitt, Christopher Skelt
  • Patent number: 8547790
    Abstract: In some aspects of the invention, a method of generating a beam of acoustic energy in a borehole is disclosed. The method includes generating a first acoustic wave at a first frequency; generating a second acoustic wave at a second frequency different than the first frequency, wherein the first acoustic wave and second acoustic wave are generated by at least one transducer carried by a tool located within the borehole; transmitting the first and the second acoustic waves into an acoustically non-linear medium, wherein the composition of the non-linear medium produces a collimated beam by a non-linear mixing of the first and second acoustic waves, wherein the collimated beam has a frequency based upon a difference between the first frequency and the second frequency; and transmitting the collimated beam through a diverging acoustic lens to compensate for a refractive effect caused by the curvature of the borehole.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: October 1, 2013
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security LLC
    Inventors: Cung Khac Vu, Dipen N. Sinha, Cristian Pantea, Kurt T. Nihei, Denis P. Schmitt, Christopher Skelt
  • Publication number: 20130067992
    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: Application
    Filed: March 7, 2012
    Publication date: March 21, 2013
    Applicant: Los Alamos National Security, LLC
    Inventors: Dipen N. Sinha, Cristian Pantea
  • Publication number: 20120227473
    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: Application
    Filed: September 6, 2011
    Publication date: September 13, 2012
    Applicant: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Patent number: 8259530
    Abstract: In some aspects of the invention, a device, positioned within a well bore, configured to generate and direct an acoustic beam into a rock formation around a borehole is disclosed. The device comprises a source configured to generate a first signal at a first frequency and a second signal at a second frequency; a transducer configured to receive the generated first and the second signals and produce acoustic waves at the first frequency and the second frequency; and a non-linear material, coupled to the transducer, configured to generate a collimated beam with a frequency equal to the difference between the first frequency and the second frequency by a non-linear mixing process, wherein the non-linear material includes one or more of a mixture of liquids, a solid, a granular material, embedded microspheres, or an emulsion.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: September 4, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Cung Khac Vu, Dipen N. Sinha, Cristian Pantea, Kurt T. Nihei, Denis P. Schmitt, Christopher Skelt
  • Patent number: 8231707
    Abstract: An apparatus and method for separating a chosen gas from a mixture of gases having no moving parts and utilizing no chemical processing is described. The separation of particulates from fluid carriers thereof has been observed using ultrasound. In a similar manner, molecular species may be separated from carrier species. It is also known that light-induced drift may separate light-absorbing species from carrier species. Therefore, the combination of temporally pulsed absorption of light with ultrasonic concentration is expected to significantly increase the efficiency of separation by ultrasonic concentration alone. Additionally, breaking the spatial symmetry of a cylindrical acoustic concentrator decreases the spatial distribution of the concentrated particles, and increases the concentration efficiency.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: July 31, 2012
    Assignee: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Patent number: 8233349
    Abstract: In some aspects of the invention, a device, positioned within a well bore, configured to generate and direct an acoustic beam into a rock formation around a borehole is disclosed. The device comprises a source configured to generate a first signal at a first frequency and a second signal at a second frequency; a transducer configured to receive the generated first and the second signals and produce acoustic waves at the first frequency and the second frequency; and a non-linear material, coupled to the transducer, configured to generate a collimated beam with a frequency equal to the difference between the first frequency and the second frequency by a non-linear mixing process, wherein the non-linear material includes one or more of a mixture of liquids, a solid, a granular material, embedded microspheres, or an emulsion.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: July 31, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Cung Khac Vu, Dipen N. Sinha, Cristian Pantea, Kurt T. Nihei, Denis P. Schmitt, Christopher Skelt
  • Patent number: 8176783
    Abstract: Apparatus and method for non-contact (stand-off) ultrasonic determination of certain characteristics of fluids in containers or pipes are described. A combination of swept frequency acoustic interferometry (SFAI), wide-bandwidth, air-coupled acoustic transducers, narrowband frequency data acquisition, and data conversion from the frequency domain to the time domain, if required, permits meaningful information to be extracted from such fluids.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: May 15, 2012
    Assignee: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Patent number: 8166801
    Abstract: The noninvasively measurement of the density and viscosity of static or flowing fluids in a section of pipe such that the pipe performs as the sensing apparatus, is described. Measurement of a suitable structural vibration resonance frequency of the pipe and the width of this resonance permits the density and viscosity to be determined, respectively. The viscosity may also be measured by monitoring the decay in time of a vibration resonance in the pipe.
    Type: Grant
    Filed: September 30, 2007
    Date of Patent: May 1, 2012
    Assignee: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Publication number: 20120068383
    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: Application
    Filed: March 14, 2011
    Publication date: March 22, 2012
    Applicant: Los Alamos National Security, LLC
    Inventors: Naveen N. Sinha, Dipen N. Sinha, Gregory Russ Goddard
  • Publication number: 20120055264
    Abstract: An apparatus and method for noninvasively detecting the presence of solid particulate matter suspended in a fluid flowing through a pipe or an oil and gas wellbore are described. Fluid flowing through a conduit containing the particulate solids is exposed to a fixed frequency (>1 MHz) of ultrasonic vibrations from a transducer attached to the outside of the pipe. The returning Doppler frequency shifted signal derived from the scattering of sound from the moving solid particles is detected by an adjacent transducer. The transmitted signal and the Doppler signal are combined to provide sensitive particulate detection. The magnitude of the signal and the Doppler frequency shift are used to determine the particle size distribution and the velocity of the particles. Measurement of the phase shift between the applied frequency and the detected Doppler shifted may be used to determine the direction of motion of the particles.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 8, 2012
    Applicant: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Publication number: 20120055262
    Abstract: An apparatus and method for down hole gas separation from the multiphase fluid flowing in a wellbore or a pipe, for determining the quantities of the individual components of the liquid and the flow rate of the liquid, and for remixing the component parts of the fluid after which the gas volume may be measured, without affecting the flow stream, are described. Acoustic radiation force is employed to separate gas from the liquid, thereby permitting measurements to be separately made for these two components; the liquid (oil/water) composition is determined from ultrasonic resonances; and the gas volume is determined from capacitance measurements. Since the fluid flows around and through the component parts of the apparatus, there is little pressure difference, and no protection is required from high pressure differentials.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 8, 2012
    Applicant: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Publication number: 20120055253
    Abstract: A method for determining the composition of fluids flowing through pipes from noninvasive measurements of acoustic properties of the fluid is described. The method includes exciting a first transducer located on the external surface of the pipe through which the fluid under investigation is flowing, to generate an ultrasound chirp signal, as opposed to conventional pulses. The chirp signal is received by a second transducer disposed on the external surface of the pipe opposing the location of the first transducer, from which the transit time through the fluid is determined and the sound speed of the ultrasound in the fluid is calculated. The composition of a fluid is calculated from the sound speed therein. The fluid density may also be derived from measurements of sound attenuation. Several signal processing approaches are described for extracting the transit time information from the data with the effects of the pipe wall having been subtracted.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 8, 2012
    Applicant: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha