Patents by Inventor Batakrishna Mandal

Batakrishna Mandal 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).

  • Patent number: 10502854
    Abstract: An example method may include selecting a proposed pulse. A minimum phase wavelet may be generated based, at least in part, on the proposed pulse. A pulse signal within a wellbore may be generated based, at least in part, on the minimum phase wavelet. An echo signal corresponding to the pulse signal from at least a portion of the wellbore may be received, wherein the echo signal is indicative of a wellbore property.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: December 10, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Batakrishna Mandal, Yinghui Lu
  • Patent number: 10436020
    Abstract: An example casing and cement evaluation tool may include a tool body and a rotating portion coupled to the tool body. A first transducer may be coupled to the rotating portion at a radial offset from a longitudinal axis of the tool. A second transducer may be coupled to the rotating portion at a different radial offset from the longitudinal axis of the tool.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: October 8, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Batakrishna Mandal
  • Patent number: 10439127
    Abstract: A bender bar transducer having stacked encapsulated actuators provides improved acoustic power over a wider frequency range, low applied voltage requirements and consistent part-to-part performance.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: October 8, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael L. Fripp, Paul G. Junghans, Chen Li, Batakrishna Mandal
  • Patent number: 10408052
    Abstract: Methods and systems for frequency-dependent fluid attenuation measurement are provided. In certain embodiments, the methods comprise: generating one or more reference acoustic signals within a reference fluid; receiving one or more reference acoustic signal reflections; determining a frequency-dependent response function based, at least in part, on the one or more reference acoustic signal reflections; generating one or more sample acoustic signals within a sample fluid; receiving one or more sample acoustic signal reflections; and determining a frequency-dependent attenuation function of the sample fluid based, at least in part, on the one or more sample acoustic signal reflections and the frequency-dependent response function.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: September 10, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Batakrishna Mandal, Srinivasan Jagannathan
  • Patent number: 10379246
    Abstract: An example method may include transmitting a first acoustic signal from a downhole tool using a transmitter gain in a transmitter circuit. A first echo signal associated with the first acoustic signal may be received at the downhole tool using a receiver gain in a receiver circuit. At least one of the transmitter gain and the receiver gain may be adjusted based, at least in part, on the received first echo signal and at least one previously received echo signal.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: August 13, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Joni Polili Lie, Batakrishna Mandal, Peng Li
  • Patent number: 10352152
    Abstract: An apparatus and method may operate to mount acoustic sensors, azimuthally offset from each other, to the exterior of a casing. After the casing and acoustic sensors are in the borehole, signals are provided to the acoustic sensors to cause the acoustic sensors to emit acoustic signals into the annulus around the casing. The method further includes detecting reflected compression waves, shear waves or a combination or conversion thereof at the acoustic sensors to generate a set of two]way travel times of the acoustic signals. The method can further include generating distance measurements of a distance between corresponding acoustic sensors and points on the borehole wall based on the two]way travel times, to determine a position of the casing within the borehole. The method can further include identifying fluids based on the two]way travel times. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: July 16, 2019
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Batakrishna Mandal
  • Patent number: 10323508
    Abstract: A system to monitor the retrieval of a well tool from a wellbore comprises a deployment member coupled to the well tool to retrievably insert the well tool in the wellbore. At least one first identification transducer is coupled to a top end of the well tool to transmit an identification signal during retrieval of the well tool. At least one second identification transducer is located at at least one axial location along a surface pressure control assembly to detect the identification signal. A controller is in data communication with the at least one second identification transducer to determine the position of the well tool relative to the pressure control assembly, and to output at least one command related to the position of the well tool relative to the pressure control assembly.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: June 18, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Randolph S. Coles, Sushovon Singha Roy, Batakrishna Mandal
  • Patent number: 10280733
    Abstract: Methods for evaluating cement bonding in a wellbore are provided. An example method for determining cement impedance includes generating one or more acoustic signals within a wellbore comprising a borehole fluid, a casing, and a cement layer. One or more reflections of the acoustic signals may be received from at least a portion of the wellbore, wherein each of the one or more reflections comprises an initial reflection portion and a resonance portion. At least one of the initial reflection portion and the resonance portion may be modified based, at least in part, on an attenuation response of the borehole fluid. An impedance of the cement layer may be determined by analyzing at least one of the modified initial reflection portion and the modified resonance portion.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: May 7, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Batakrishna Mandal, Srinivasan Jagannathan
  • Patent number: 10280744
    Abstract: An acoustic transducer, such as a bender bar, having ferroelectric actuation elements that are designed to optimize a predetermined deflection mode shape. The acoustic transducers may include one or more rounded modally shaped actuation elements or weighted actuation elements. Modal shaping of the actuation elements allows for specific targeting of modes which most efficiently radiate acoustic energy.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: May 7, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael L. Fripp, Paul G. Junghans, Chen Li, Batakrishna Mandal
  • Patent number: 10273797
    Abstract: An example cement and casing evaluation tool includes an amplifier and a filter coupled an output of the amplifier. A transducer may be coupled to the output of the filter. A ringing reduction system may be coupled to at least one of the amplifier, the filter, and the transducer, wherein the ringing reduction system selectively dissipates energy from at least one of the amplifier, the filter, and the transducer in response to a control signal.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: April 30, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Peng Li, Zheng Chen, Batakrishna Mandal
  • Publication number: 20190101663
    Abstract: An acoustic imaging tool, logging system and method are disclosed for producing high-resolution three-dimensional images. The imaging tool may include three separate arrangements of acoustic transducers: a circumferential set for wall inspection, internal transducers for fluid characterization within a chamber open to wellbore fluid, and forward-looking transducers located at the bottom end of the tool. Forward-looking transducers emit ultrasonic waves and receive reflections back when solid features are located under the tool. In some embodiments, Doppler effect calculations may be performed to produce forward-looking acoustic images. In other embodiments, an ambient acoustic energy illuminates the wellbore, and an acoustic lens set focuses reflected ultrasonic waves onto an acoustic imaging array of an ultrasonic camera.
    Type: Application
    Filed: April 14, 2016
    Publication date: April 4, 2019
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Darren P. Walters, Ivo Foianini, Kevin S. Harive, Batakrishna Mandal, Chung Chang
  • Patent number: 10241086
    Abstract: In some implementations, a method for validating an acoustic bond-log tool includes having a test fixture including a wellbore casing emulating tubing. An outer tubing emulates a well formation and forms a perimeter of an annulus surrounding the wellbore casing emulating tubing. The wellbore casing tubing is configured with a stepped outer surface emulating different wellbore casing sidewall thicknesses. A dividing structure is coupled in the axial direction to the outer surface of the wellbore casing emulating tubing and to the inner surface of the outer tubing to radially subdivide the annulus into a plurality of hermetically sealable sample sections. Each sample section contains a sample of a material having a known acoustic impedance. The acoustic bond-log tool is validated by comparing a bond-log tool measurement of the acoustic impedance of each sample in a particular sample section to the known acoustic impedance of the sample.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: March 26, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Walmy Cuello Jimenez, Xueyu Pang, Paul Jones, Robert Eric Epstein, Zachary Edward Gordon, Batakrishna Mandal, Tatiana Gilstrap
  • Patent number: 10209384
    Abstract: Disclosed herein is an approach to improving the accuracy of signal-peak tracking in acoustic logs by supplementing a semblance method used to detect signal peaks in individual coherence-, correlation- or amplitude-based semblance maps with consistency checks based on rock-physics constraints and/or based on history and/or future data for the signal of interest.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: February 19, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Grant Philip Goodyear, Kristoffer Thomas Walker, Batakrishna Mandal
  • Patent number: 10175375
    Abstract: A system and method for effective estimation of properties of a formation using acoustic array processing is disclosed. An acoustic tool is directed to a zone of interest in the formation and generates a first signal. Real data corresponding to the first signal is then received. One or more basic parameters are provided as input. The basic parameters may include parameters relating to the acoustic tool or parameters relating to the zone of interest. A time semblance shear slowness and a frequency semblance shear slowness are determined using the basic parameters. A mask is then selected using the determined time semblance and frequency semblance shear slowness values and used to isolate a dispersion curve. A shear slowness value is selected from the dispersion curve and quality control is performed on the selected shear slowness value.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: January 8, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Pradip Kumar Mukhopadhyay, Batakrishna Mandal
  • Publication number: 20180038980
    Abstract: Disclosed herein is an approach to improving the accuracy of signal-peak tracking in acoustic logs by supplementing a semblance method used to detect signal peaks in individual coherence-, correlation- or amplitude-based semblance maps with consistency checks based on rock-physics constraints and/or based on history and/or future data for the signal of interest.
    Type: Application
    Filed: January 29, 2016
    Publication date: February 8, 2018
    Inventors: Grant Philip Goodyear, Kristoffer Thomas Walker, Batakrishna Mandal
  • Publication number: 20180021815
    Abstract: A system and downhole tool comprising an ultrasonic transducer with a piezoelectric material embedded in a backing and a method of determining a parameter using the ultrasonic transducer. A self-noise of the transducer can be reduced by the piezoelectric material being at least partially embedded in the backing. The ultrasonic transducer can include an encapsulating material that encapsulates the backing.
    Type: Application
    Filed: April 20, 2016
    Publication date: January 25, 2018
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Jing Jin, Yao Ge, Batakrishna Mandal
  • Patent number: 9869173
    Abstract: An example method includes determining a frequency response of a tuned pulse to be transmitted from a transmission element. A matching frequency envelope corresponding to a frequency envelope of the frequency response may be determined. A time domain signal corresponding to the matching frequency envelope may be determined. A series of digital pulses corresponding to the time domain signal may be determined. An analog output at a switching amplifier corresponding to the series of digital pulses may be generated. A transmission element may be excited with the analog output.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: January 16, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Peng Li, Batakrishna Mandal, Boguslaw Wiecek, Zheng Chen
  • Publication number: 20180003036
    Abstract: A communication system that is positionable in a wellbore can include a first transceiver positioned externally to a casing string. The first transceiver can be operable to detect a presence or an absence of a surface wave; determine a location of a fluid in the wellbore based on the presence or the absence of the surface wave; and transmit data indicative of the location to a second transceiver. The surface wave can include an electromagnetic wave that has a magnetic field or an electric field that is non-transverse to a direction of propagation of the surface wave. The communication system can also include the second transceiver, which can be positioned externally the casing string and operable to receive the data.
    Type: Application
    Filed: March 11, 2015
    Publication date: January 4, 2018
    Inventors: Mark W. Roberson, Paul F. Rodney, Batakrishna Mandal, Krishna M. Ravi, Scott Goodwin, Vimal V. Shah
  • Publication number: 20170328201
    Abstract: An assembly for use in a wellbore can include a plurality of sensors positioned external to a casing string. The plurality of sensors can be positioned for detecting an amount of a hydrocarbon that is present in a fluid in the wellbore and a pH of the fluid in the wellbore. The plurality of sensors can be positioned for wirelessly transmitting signals representing the amount of the hydrocarbon that is present in the fluid and the pH of the fluid to a receiving device.
    Type: Application
    Filed: March 11, 2015
    Publication date: November 16, 2017
    Inventors: Paul F. Rodney, Mark W. Roberson, Batakrishna Mandal, Vimal V. Shah, Scott Goodwin
  • Publication number: 20170306752
    Abstract: An example casing and cement evaluation tool may include a tool body and a rotating portion coupled to the tool body. A first transducer may be coupled to the rotating portion at a radial offset from a longitudinal axis of the tool. A second transducer may be coupled to the rotating portion at a different radial offset from the longitudinal axis of the tool.
    Type: Application
    Filed: April 28, 2016
    Publication date: October 26, 2017
    Inventor: Batakrishna Mandal