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: 20120055239
    Abstract: A measurement system and method for permitting multiple independent measurements of several physical parameters of multiphase fluids flowing through pipes are described. Multiple acoustic transducers are placed in acoustic communication with or attached to the outside surface of a section of existing spool (metal pipe), typically less than 3 feet in length, for noninvasive measurements. Sound speed, sound attenuation, fluid density, fluid flow, container wall resonance characteristics, and Doppler measurements for gas volume fraction may be measured simultaneously by the system. Temperature measurements are made using a temperature sensor for oil-cut correction.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 8, 2012
    Applicant: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Publication number: 20120034396
    Abstract: A method to increase the storage density on magnetic recording media by physically separating the individual bits from each other with a non-magnetic medium (so-called bit patterned media). This allows the bits to be closely packed together without creating magnetic “cross-talk” between adjacent bits. In one embodiment, ferromagnetic particles are submerged in a resin solution, contained in a reservoir. The bottom of the reservoir is made of piezoelectric material.
    Type: Application
    Filed: March 14, 2011
    Publication date: February 9, 2012
    Applicant: Los Alamos National Security, LLC
    Inventors: Bart Raeymaekers, Dipen N. Sinha
  • Patent number: 7963165
    Abstract: Apparatus and method for non-contact ultrasonic detection of features on or within the walls of hollow pipes are described. An air-coupled, high-power ultrasonic transducer for generating guided waves in the pipe wall, and a high-sensitivity, air-coupled transducer for detecting these waves, are disposed at a distance apart and at chosen angle with respect to the surface of the pipe, either inside of or outside of the pipe. Measurements may be made in reflection or transmission modes depending on the relative position of the transducers and the pipe. Data are taken by sweeping the frequency of the incident ultrasonic waves, using a tracking narrow-band filter to reduce detected noise, and transforming the frequency domain data into the time domain using fast Fourier transformation, if required.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: June 21, 2011
    Assignee: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Publication number: 20110127164
    Abstract: The present invention includes an apparatus and corresponding method for fluid flow control in microfluidic applications. A microchamber, filled with a fluid, is in fluid contact with a flexible plate. A transducer is acoustically coupled to the flexible plate. A function generator outputs a signal to excite the transducer, which in turn induces drumhead vibration of the flexible plate, creating a flow pattern within the fluid filled microchamber.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 2, 2011
    Applicant: Los Alamos National Security, LLC
    Inventors: Naveen Neil Sinha, Gregory Kaduchak, Dipen N. Sinha, Peter A. Adcock
  • Publication number: 20110128003
    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: Application
    Filed: November 30, 2009
    Publication date: June 2, 2011
    Applicants: Chevron U.S.A, Inc., Los Alamos National Security
    Inventors: M. Clark THOMPSON, Dipen N. Sinha, Don M. Coates, Jacobo R. Archuletta, Manuel E. Gonzalez
  • Publication number: 20110096622
    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 26, 2010
    Publication date: April 28, 2011
    Inventors: Dipen N. Sinha, Cristian Pantea, Curtis F. Osterhoudt
  • Publication number: 20110080803
    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: Application
    Filed: June 3, 2010
    Publication date: April 7, 2011
    Applicants: Chevron U.S.A., Inc., Los Alamos National Security, LLC, Los Alamos National Laboratory
    Inventors: Cung Khac Vu, Dipen N. Sinha, Cristian Pantea, Kurt T. Nihei, Denis P. Schmitt, Christopher Skelt
  • Publication number: 20110080804
    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: Application
    Filed: June 3, 2010
    Publication date: April 7, 2011
    Applicants: 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: 20110080805
    Abstract: In some aspects of the invention, a method of generating a beam of acoustic energy in a borehole is disclosed.
    Type: Application
    Filed: June 3, 2010
    Publication date: April 7, 2011
    Applicants: Chevron U.S.A., Inc., Los Alamos National Security, LLC, Los Alamos National Laboratory
    Inventors: Cung Khac Vu, Dipen N. Sinha, Cristian Pantea, Kurt T. Nihei, Denis P. Schmitt, Christopher Skelt
  • Publication number: 20100322031
    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: Application
    Filed: August 27, 2010
    Publication date: December 23, 2010
    Applicants: Chevron U.S.A., Inc., Los Alamos National Security, LLC
    Inventors: Cung Khac VU, Dipen N. Sinha, Cristian Pantea, Kurt Nihei, Denis P. Schmitt, Christopher Skelt
  • Publication number: 20100322029
    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: Application
    Filed: August 27, 2010
    Publication date: December 23, 2010
    Applicants: Chevron U.S.A., Inc., Los Alamos National Security, LLC
    Inventors: Cung Khac VU, Dipen N. Sinha, Cristian Pantea, Kurt Nihei, Denis P. Schmitt, Christopher Skelt
  • Patent number: 7852091
    Abstract: Apparatus and method are described for measuring the location and speed of an object, such as instrumentation on a movable platform, disposed within a pipe, using continuous-wave, amplitude-modulated microwave radiation.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: December 14, 2010
    Assignee: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha
  • Patent number: 7839718
    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: July 2, 2008
    Date of Patent: November 23, 2010
    Assignees: Chevron U.S.A. Inc., Los Alamos National Security, LLC
    Inventors: Cung Khac Vu, Dipen N. Sinha, Cristian Pantea, Kurt Nihei, Denis P. Schmitt, Christopher Skelt
  • Publication number: 20100077919
    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: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Applicant: The Regents of the University of California
    Inventor: Dipen N. Sinha
  • Publication number: 20100002540
    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: Application
    Filed: July 2, 2008
    Publication date: January 7, 2010
    Inventors: Cung Khac VU, Dipen N. Sinha, Cristian Pantea, Kurt Nihei, Denis P. Schmitt, Christopher Skelt
  • Publication number: 20090085582
    Abstract: Apparatus and method are described for measuring the location and speed of an object, such as instrumentation on a movable platform, disposed within a pipe, using continuous-wave, amplitude-modulated microwave radiation.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventor: Dipen N. Sinha
  • Publication number: 20090084178
    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: Application
    Filed: September 30, 2007
    Publication date: April 2, 2009
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventor: Dipen N. Sinha
  • Publication number: 20090078049
    Abstract: Apparatus and method for non-contact ultrasonic detection of features on or within the walls of hollow pipes are described. An air-coupled, high-power ultrasonic transducer for generating guided waves in the pipe wall, and a high-sensitivity, air-coupled transducer for detecting these waves, are disposed at a distance apart and at chosen angle with respect to the surface of the pipe, either inside of or outside of the pipe. Measurements may be made in reflection or transmission modes depending on the relative position of the transducers and the pipe. Data are taken by sweeping the frequency of the incident ultrasonic waves, using a tracking narrow-band filter to reduce detected noise, and transforming the frequency domain data into the time domain using fast Fourier transformation, if required.
    Type: Application
    Filed: September 25, 2007
    Publication date: March 26, 2009
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventor: Dipen N. Sinha
  • Publication number: 20090078050
    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: Application
    Filed: September 25, 2007
    Publication date: March 26, 2009
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventor: Dipen N. Sinha
  • Patent number: 7228740
    Abstract: An apparatus for noninvasively monitoring the flow and/or the composition of a flowing liquid using ultrasound is described. The position of the resonance peaks for a fluid excited by a swept-frequency ultrasonic signal have been found to change frequency both in response to a change in composition and in response to a change in the flow velocity thereof. Additionally, the distance between successive resonance peaks does not change as a function of flow, but rather in response to a change in composition. Thus, a measurement of both parameters (resonance position and resonance spacing), once calibrated, permits the simultaneous determination of flow rate and composition using the apparatus and method of the present invention.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: June 12, 2007
    Assignee: Los Alamos National Security, LLC
    Inventor: Dipen N. Sinha