Patents by Inventor Krishna M. Ravi

Krishna M. Ravi 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: 20180223650
    Abstract: Methods and systems are presented in this disclosure for determining information (e.g., visual information) about locations of different fluids flowing along a casing in a wellbore. A plurality of radio frequency (RF) micro-electro-mechanical system (MEMS) tags is placed in a plurality of fluids flowing through an annulus region between a casing string in the wellbore and a reservoir formation. At a plurality of sensing nodes located along the casing string, information about the fluids is gathered by communicating with the RF MEMS tags placed in the fluids. The information about fluid locations along the casing gathered by the sensing nodes is communicated to a receiving device, and appropriate operation in relation to the wellbore is performed based on the communicated information.
    Type: Application
    Filed: September 18, 2015
    Publication date: August 9, 2018
    Inventors: Krishna M. Ravi, Mark W. Roberson, Scott Goodwin
  • Patent number: 9994757
    Abstract: Methods and compositions for treating a subterranean formation with salt-tolerant cement slurries including treating a salt-containing subterranean formation having sodium salts, potassium salts, magnesium salts, calcium salts, or any combination thereof comprising: providing a salt-tolerant cement slurry comprising: a base fluid, a cementitious material, a pozzolanic material, a salt-tolerant fluid loss additive, a salt additive, and optionally, an elastomer, a weight additive, a fluid loss intensifier, a strengthening agent, a dispersant, or any combination thereof; introducing the salt-tolerant cement slurry into the subterranean formation; and allowing the salt-tolerant cement slurry to set.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: June 12, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Krishna M. Ravi, Rahul Chandrakant Patil, Sandip Prabhakar Patil, Sohini Bose, Abhimanyu Deshpande
  • Publication number: 20180135382
    Abstract: Methods of formulating a cement slurry for use in a subterranean salt formation, including methods for formulating a cement slurry capable of providing long-term zonal isolation within a subterranean salt formation. The methods also take into account the effects of treatment fluids on the cement slurry, such as drilling fluids, spacer fluids, flush fluids, or other relevant fluids used to perform a subterranean formation operation.
    Type: Application
    Filed: January 12, 2018
    Publication date: May 17, 2018
    Inventors: Siva Rama Krishna JANDHYALA, Krishna M. RAVI, Sandip Prabhakar PATIL, Krishna Babu YERUBANDI, Abhimanyu Pramod DESHPANDE, Yogesh BARHATE, Rahul Chandrakant PATIL
  • Publication number: 20180136356
    Abstract: A method for use with a subterranean well can include modeling multiple fluid types in an annulus formed between casing and an earth formation penetrated by a wellbore, inverting electromagnetic data acquired by sensors in the well, and selecting at least one of the fluid types based on the inverting. A system for use with a subterranean well can include multiple sensors longitudinally spaced apart along a casing in a wellbore, each of the sensors imparting electromagnetic impulses to a fluid present in an annulus formed between the casing and the wellbore, and each of the sensors providing observed data indicative of at least one physical property associated with the fluid.
    Type: Application
    Filed: June 26, 2015
    Publication date: May 17, 2018
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Glenn A. Wilson, Burkay Donderici, Yan-Wah M. Chia, Krishna M. Ravi
  • Publication number: 20180087377
    Abstract: Methods including experimentally determining a salt creep profile for a single salt or intercalated salts in a subterranean formation, designing a proposed cement slurry based on the salt creep profile, experimentally determining whether the proposed cement slurry is capable of forming a wellbore load resistant cement sheath based on actual thermal and thereto-mechanical properties of the proposed cement slurry, theoretically determining whether the proposed cement slurry is capable of forming the wellbore load resistant cement sheath by designing an electronic, cross-section geometric model of the subterranean salt formation and simulating a condition of the wellbore loads on the cured proposed cement slurry using the geometric model, establishing a final cement slurry capable of forming the wellbore load resistant cement sheath, and performing a final cementing operation with the final cement slurry in the subterranean salt formation.
    Type: Application
    Filed: November 10, 2017
    Publication date: March 29, 2018
    Inventors: Siva Rama Krishna Jandhyala, Krishna M. Ravi
  • Publication number: 20180082090
    Abstract: A communication assembly including at least one sensor assembly made up of interrogation circuitry and one or more antennae is described. The interrogation circuitry comprises at least one inductor comprising at least two sensing coils for reception of signals from the MEMS data sensors.
    Type: Application
    Filed: March 3, 2015
    Publication date: March 22, 2018
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Mark W. Roberson, Charles Bartee, Krishna M. Ravi
  • Publication number: 20180051528
    Abstract: A method of treating lost circulation issues stemming from loss zones during the drilling and cementing process through the utilization of a thixotropic cement. The method comprises the steps of encountering a loss zone in a bore hole during drilling or running casing and pumping a treatment fluid into the loss zone, wherein the treatment fluid is a gel capable of gelling, breaking when sheared, and building back shear strength after shearing is removed.
    Type: Application
    Filed: April 7, 2015
    Publication date: February 22, 2018
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Krishna M. RAVI, Rahul Chandrakant PATIL, Sandip Prabhakar PATIL, Siva Rama Krishna JANDHYALA, Ravinder GAHLAWAT
  • Publication number: 20180030825
    Abstract: Radio frequency Micro-Electro-Mechanical System (“MEMS”) tags are geometrically shaped using protective structures. The MEMS tags may be added to wellbore cement, and pumped downhole. In addition to protecting the MEMS tags from the harsh downhole environment, the protective structures produce a more rounded shape which, in turns, increases the flow efficiency of the MEMS tags. An interrogation tool may be deployed downhole to interrogate the MEMS tags, to thereby perform a variety of wellbore operations such as assessing the integrity of the cement seal.
    Type: Application
    Filed: March 16, 2015
    Publication date: February 1, 2018
    Inventors: Krishna M. RAVI, Mark W. ROBERSON
  • Patent number: 9879519
    Abstract: An apparatus and method may operate to mount one or more communication assemblies relative to the exterior of a casing being placed in a borehole. Two communication assemblies can be placed in longitudinally spaced relation to one another along the casing, wherein each communication assembly is configured to obtain excitation responses from electrodes of a fluid sensing component, where the excitation responses vary based on properties of fluids in one or more regions of the annulus surrounding the casing. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: January 30, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mark W. Roberson, Scott Goodwin, Burkay Donderici, Glenn A. Wilson, Paul F. Rodney, Vimal V. Shah, Craig W. Roddy, Krishna M. Ravi
  • Publication number: 20180010438
    Abstract: A well casing is cemented in a well bore in a subterranean formation by pumping cement slurry down into the well casing so that the cement slurry flows up into an annulus surrounding the well casing. While pumping the cement slurry, the position of the top of the cement slurry in the annulus is sensed, and the rise of the sensed position of the top of the cement slurry in the annulus is recorded as a function of time. The recording is analyzed to evaluate the cement job. For example, the analysis may indicate a problem addressed by adjusting a cement plan for a future cement job, and the analysis may indicate a need to repair a location of the set cement by perforating the well casing at the location to be repaired, and pumping cement slurry down the well casing to fill the location to be repaired.
    Type: Application
    Filed: March 20, 2015
    Publication date: January 11, 2018
    Applicant: HALLIBURTON ENERGY SERVICES INC.
    Inventors: Krishna M. Ravi, Mark W. ROBERSON, Scott GOODWIN
  • Publication number: 20180010033
    Abstract: Methods and compositions for treating a subterranean formation with salt-tolerant cement slurries including treating a salt-containing subterranean formation having sodium salts, potassium salts, magnesium salts, calcium salts, or any combination thereof comprising: providing a salt-tolerant cement slurry comprising: a base fluid, a cementitious material, a pozzolanic material, a salt-tolerant fluid loss additive, a salt additive, and optionally, an elastomer, a weight additive, a fluid loss intensifier, a strengthening agent, a dispersant, or any combination thereof; introducing the salt-tolerant cement slurry into the subterranean formation; and allowing the salt-tolerant cement slurry to set.
    Type: Application
    Filed: September 21, 2017
    Publication date: January 11, 2018
    Inventors: Krishna M. RAVI, Rahul Chandrakant PATIL, Sandip Prabhakar PATIL, Sohini BOSE, Abhimanyu DESHPANDE
  • 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: 20170350239
    Abstract: A system that is positionable in a wellbore can include a transceiver that is positionable external to a casing string and programmable to vary a number of data packets that are wirelessly transmitted by the transceiver. The number of data packets can correspond to an amount of data wirelessly transmitted by the transceiver about an environment in the wellbore.
    Type: Application
    Filed: March 11, 2015
    Publication date: December 7, 2017
    Inventors: Mark W. Roberson, Krishna M. Ravi
  • Publication number: 20170342826
    Abstract: Disclosed are telemetry systems and methods that employ a plurality of electromagnetic transceivers disposed outside a well casing string at a corresponding plurality of depths along the casing string. Each transceiver includes one or more toroidal inductors circumferentially surrounding the casing string and inductively coupled thereto to allow signal transmission between transceivers via currents induced in the casing. In some embodiments, signals are relayed via a chain of transceivers to facilitate indirect communication between a surface facility and other transceivers located too deep for direct communication to the surface.
    Type: Application
    Filed: December 31, 2014
    Publication date: November 30, 2017
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Glenn A. Wilson, Ahmed Fouda, Burkay Donderici, Li Gao, Krishna M. Ravi, Mark W. Roberson, Scott Goodwin, Charles Bartee, Alexander Stewart
  • Patent number: 9822631
    Abstract: A method for measuring parameters related to wellsite operations comprises mixing Micro-Electro-Mechanical System (MEMS) sensors with a wellbore servicing composition in surface wellbore operating equipment. The MEMS sensors are assigned a unique identified that may be used to track individual MEMS sensor as the MEMS sensors travel through the wellbore and may be used to correlate sensor measurements taken by the MEMS sensors with particular locations in the wellbore. The MEMS sensors may be active and transmit their respective identifiers and sensor data to the surface. Transmitting identifier and sensor data from a MEMS sensor to the surface wellbore operating equipment may be via one or more other MEMS sensors, downhole devices, and surface devices.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: November 21, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Krishna M. Ravi, Craig W. Roddy, Ricky L. Covington
  • Patent number: 9822639
    Abstract: Methods including experimentally determining a salt creep profile for a single salt or intercalated salts in a subterranean formation, designing a proposed cement slurry based on the salt creep profile, experimentally determining whether the proposed cement slurry is capable of forming a wellbore load resistant cement sheath based on actual thermal and thermo-mechanical properties of the proposed cement slurry, theoretically determining whether the proposed cement slurry is capable of forming the wellbore load resistant cement sheath by designing an electronic, cross-section geometric model of the subterranean salt formation and simulating a condition of the wellbore loads on the cured proposed cement slurry using the geometric model, establishing a final cement slurry capable of forming the wellbore load resistant cement sheath, and performing a final cementing operation with the final cement slurry in the subterranean salt formation.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: November 21, 2017
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Siva Rama Krishna Jandhyala, Krishna M. Ravi
  • Patent number: 9796905
    Abstract: Methods and compositions for treating a subterranean formation with salt-tolerant cement slurries including treating a salt-containing subterranean formation having sodium salts, potassium salts, magnesium salts, calcium salts, or any combination thereof comprising: providing a salt-tolerant cement slurry comprising: a base fluid, a cementitious material, a pozzolanic material, a salt-tolerant fluid loss additive, a salt additive, and optionally, an elastomer, a weight additive, a fluid loss intensifier, a strengthening agent, a dispersant, or any combination thereof; introducing the salt-tolerant cement slurry into the subterranean formation; and allowing the salt-tolerant cement slurry to set.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: October 24, 2017
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Krishna M. Ravi, Rahul Chandrakant Patil, Sandip Prabhakar Patil, Sohini Bose, Abhimanyu Deshpande
  • Patent number: 9732584
    Abstract: A method of servicing a wellbore, comprising placing a plurality of Micro-Electro-Mechanical System (MEMS) sensors in a wellbore composition, placing the wellbore composition in the wellbore, obtaining data from the MEMS sensors using a plurality of data interrogation units spaced along a length of the wellbore, and telemetrically transmitting the data from an interior of the wellbore to an exterior of the wellbore using a conduit positioned in the wellbore. A system, comprising a wellbore extending the earth's surface, a conduit positioned in the wellbore, a wellbore composition positioned in the wellbore, the wellbore composition comprising a plurality of Micro-Electro-Mechanical System (MEMS) sensors, and a plurality of data interrogation units spaced along a length of the wellbore and adapted to obtain data from the MEMS sensors and telemetrically transmit the data from an interior of the wellbore to an entrance of the wellbore via the conduit.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: August 15, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Craig W. Roddy, Rick Covington, Krishna M. Ravi, Michael Bittar, Clovis Bonavides, Gordon Moake, Batakrishna Mandal, Paul Rodney, William Tapie
  • Publication number: 20170218748
    Abstract: Various embodiments include nuclear magnetic resonance (MR) sensor array systems and methods are disclosed. One such system includes a downhole casing having at least one MR sensor array peripherally coupled to an outside of the casing. At least one MR sensor array can include an MR sensor configured to monitor a cement/fluid mix composition while the cement is setting.
    Type: Application
    Filed: May 19, 2014
    Publication date: August 3, 2017
    Inventors: Paul Joseph GANSSLE, Krishna M. RAVI, Songhua CHEN, Peter James BOUL
  • Publication number: 20170183964
    Abstract: Methods including experimentally determining a salt creep profile for a single salt or intercalated salts in a subterranean formation, designing a proposed cement slurry based on the salt creep profile, experimentally determining whether the proposed cement slurry is capable of forming a wellbore load resistant cement sheath based on actual thermal and thermo-mechanical properties of the proposed cement slurry, theoretically determining whether the proposed cement slurry is capable of forming the wellbore load resistant cement sheath by designing an electronic, cross-section geometric model of the subterranean salt formation and simulating a condition of the wellbore loads on the cured proposed cement slurry using the geometric model, establishing a final cement slurry capable of forming the wellbore load resistant cement sheath, and performing a final cementing operation with the final cement slurry in the subterranean salt formation.
    Type: Application
    Filed: March 10, 2015
    Publication date: June 29, 2017
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Siva Rama Krishna Jandhyala, Krishna M. Ravi