Patents by Inventor Varadarajan Dwarakanath

Varadarajan Dwarakanath 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: 20240327698
    Abstract: Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises a surfactant and optionally one or more secondary surfactants. Also provided are methods of using the stabilized injection fluids in stimulation operations.
    Type: Application
    Filed: October 27, 2023
    Publication date: October 3, 2024
    Inventors: Dustin L. WALKER, Gayani W. PINNAWALA, Nabijan NIZAMIDIN, Varadarajan DWARAKANATH, Guo-Qing TANG, Dustin J. LOWRY, Tetsuo A. INOUYE, Taimur MALIK
  • Publication number: 20240279532
    Abstract: Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises a non-ionic surfactant and optionally one or more secondary surfactants.
    Type: Application
    Filed: September 18, 2023
    Publication date: August 22, 2024
    Inventors: Dustin L. WALKER, Gayani W. PINNAWALA, Nabijan NIZAMIDIN, Varadarajan DWARAKANATH, Guo-Qing TANG, Dustin J. LOWRY, Tetsuo Art INOUYE, Taimur MALIK
  • Publication number: 20240271032
    Abstract: Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises an anionic surfactant and optionally one or more secondary surfactants.
    Type: Application
    Filed: September 11, 2023
    Publication date: August 15, 2024
    Inventors: Dustin L. WALKER, Gayani W. PINNAWALA, Nabijan NIZAMIDIN, Varadarajan DWARAKANATH, Guo-Qing TANG, Dustin J. LOWRY, Tetsuo Art INOUYE, Taimur MALIK
  • Publication number: 20240271031
    Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 ?m filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
    Type: Application
    Filed: February 9, 2024
    Publication date: August 15, 2024
    Inventors: Do Hoon Kim, Dennis Arun Alexis, Varadarajan Dwarakanath, David Espinosa, Taimur Malik, Logan Jackson, Tom Lynch, Ronald Robinson, Frances Fournier, Hong Yang, Sukhjit Aujla
  • Publication number: 20240254382
    Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 ?m filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
    Type: Application
    Filed: February 9, 2024
    Publication date: August 1, 2024
    Inventors: Do Hoon Kim, Dennis Arun Alexis, Varadarajan Dwarakanath, David Espinosa, Taimur Malik, Logan Jackson, Tom Lynch, Ronald Robinson, Frances Fournier, Hong Yang, Sukhjit Aujla
  • Publication number: 20240247180
    Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 ?m filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
    Type: Application
    Filed: February 9, 2024
    Publication date: July 25, 2024
    Inventors: Do Hoon Kim, Dennis Arun Alexis, Varadarajan Dwarakanath, David Espinosa, Taimur Malik, Logan Jackson, Tom Lynch, Ronald Robinson, Frances Fournier, Hong Yang, Sukhjit Aujla
  • Patent number: 12012549
    Abstract: The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: June 18, 2024
    Assignees: CHEVRON USA INC, CHEVRON ORONITE COMPANY LLC
    Inventors: Varadarajan Dwarakanath, Gayani W. Pinnawala, Andrew M. Thomas, Curtis B. Campbell, Andrew M. Davidson, Ping Wang
  • Patent number: 12012547
    Abstract: The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: June 18, 2024
    Assignees: CHEVRON U.S.A. INC., CHEVRON ORONITE COMPANY LLC
    Inventors: Gayani W. Pinnawala, Varadarajan Dwarakanath, Andrew M. Thomas, Curtis B. Campbell, Andrew M. Davidson, Ping Wang
  • Publication number: 20240182781
    Abstract: Disclosed herein are methods and composition for breaking foam, emulsions, or any combination thereof.
    Type: Application
    Filed: February 12, 2024
    Publication date: June 6, 2024
    Inventors: Gayani W. PINNAWALA, Sujeewa S. PALAYANGODA, Varadarajan DWARAKANATH, Mohamad SALMAN, Mohsen S. TAGAVIFAR
  • Publication number: 20240182779
    Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 ?m filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
    Type: Application
    Filed: February 9, 2024
    Publication date: June 6, 2024
    Inventors: Do Hoon Kim, Dennis Arun Alexis, Varadarajan Dwarakanath, David Espinosa, Taimur Malik, Logan Jackson, Tom Lynch, Ronald Robinson, Frances Fournier, Hong Yang, Sukhjit Aujla
  • Publication number: 20240174914
    Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 ?m filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
    Type: Application
    Filed: June 16, 2023
    Publication date: May 30, 2024
    Inventors: Do Hoon Kim, Dennis Arun Alexis, Varadarajan Dwarakanath, David Espinosa, Taimur Malik, Logan Jackson, Tom Lynch, Ronald Robinson, Frances Fournier, Hong Yang, Sukhjit Aujla
  • Patent number: 11905461
    Abstract: Disclosed are foam precursor compositions, foamed compositions, and methods of using these foamed compositions for the stimulation of unconventional reservoirs.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: February 20, 2024
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Varadarajan Dwarakanath, Taimur Malik, Lin Zuo, Jimin Daniel Zhou, Nabijan Nizamidin, Gregory A. Winslow, Reza Banki, Mohamad Salman
  • Publication number: 20240052234
    Abstract: Provided herein are compositions comprising borate-acid buffers, as well as methods of using these compositions in oil and gas operations, including enhanced oil recovery (EOR) operations, fracturing operations, stimulation operations, etc.
    Type: Application
    Filed: October 17, 2023
    Publication date: February 15, 2024
    Inventors: Nabijan NIZAMIDIN, Gayani W. PINNAWALA, Guo-Qing TANG, Varadarajan DWARAKANATH, Gregory A. WINSLOW, Jordan Taylor ISBELL, Taimur MALIK
  • Patent number: 11898100
    Abstract: Disclosed herein are methods and composition for breaking foam, emulsions, or any combination thereof.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: February 13, 2024
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Gayani W. Pinnawala, Sujeewa S. Palayangoda, Varadarajan Dwarakanath, Mohamad Salman, Mohsen S. Tagavifar
  • Patent number: 11884879
    Abstract: Disclosed are compositions and methods for use in oil and gas operations.
    Type: Grant
    Filed: February 14, 2022
    Date of Patent: January 30, 2024
    Assignees: CHEVRON U.S.A. INC., CHEVRON ORONITE COMPANY LLC
    Inventors: Dennis A. Alexis, Gayani Pinnawala Arachchilage, Varadarajan Dwarakanath, Do Hoon Kim, Taimur Malik, Gregory A. Winslow, Aaron Wilhelm
  • Patent number: 11834609
    Abstract: Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises a surfactant and optionally one or more secondary surfactants. Also provided are methods of using the stabilized injection fluids in stimulation operations.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: December 5, 2023
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Dustin L. Walker, Gayani W. Pinnawala, Nabijan Nizamidin, Varadarajan Dwarakanath, Guo-Qing Tang, Dustin J. Lowry, Tetsuo Art Inouye, Taimur Malik
  • Publication number: 20230383636
    Abstract: Described are compositions and methods for use in oil and gas operations. The methods can decrease pressure drop along a lateral segment of a wellbore in an unconventional subterranean formation.
    Type: Application
    Filed: May 31, 2023
    Publication date: November 30, 2023
    Inventors: Gojko Matovic, Nabijan Nizamidin, Michael Ogechukwuka Unomah, Do Hoon Kim, Varadarajan Dwarakanath, Taimur Malik, Gayani W. Pinnawala, Dennis A. Alexis, Samuel Wei-en Lau
  • Publication number: 20230332037
    Abstract: The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof such as in oil and gas operations. Methods of making polyanionic surfactants are also described.
    Type: Application
    Filed: April 26, 2021
    Publication date: October 19, 2023
    Inventors: Gayani W. PINNAWALA, Sujeewa S. PALAYANGODA, Gregory A. WINSLOW, Varadarajan DWARAKANATH
  • Patent number: 11787998
    Abstract: Provided herein are compositions comprising borate-acid buffers, as well as methods of using these compositions in oil and gas operations, including enhanced oil recovery (EOR) operations, fracturing operations, stimulation operations, etc.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: October 17, 2023
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Nabijan Nizamidin, Gayani W. Pinnawala, Guo-Qing Tang, Varadarajan Dwarakanath, Gregory A. Winslow, Jordan Taylor Isbell, Taimur Malik
  • Patent number: 11760921
    Abstract: Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises a non-ionic surfactant and optionally one or more secondary surfactants.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: September 19, 2023
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Dustin L. Walker, Gayani W. Pinnawala, Nabijan Nizamidin, Varadarajan Dwarakanath, Guo-Qing Tang, Dustin J. Lowry, Tetsuo Art Inouye, Taimur Malik