Patents by Inventor Gayani W. PINNAWALA

Gayani W. PINNAWALA 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: 20220333003
    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: June 29, 2022
    Publication date: October 20, 2022
    Inventors: Nabijan Nizamidin, Gayani W. Pinnawala, Guo-Qing Tang, Varadarajan Dwarakanath, Gregory A. Winslow, Jordan Taylor Isbell, Taimur Malik
  • Publication number: 20220290031
    Abstract: Described herein are aqueous based foams for use in drilling operations. The foams can be used in below bubble point drilling operations to control the migration of reservoir gases (e.g., hydrogen sulfide) to the surface.
    Type: Application
    Filed: August 14, 2020
    Publication date: September 15, 2022
    Inventors: Ruth Ellen HAHN, Varadarajan DWARAKANATH, Kerry SPILKER, Gregory A. WINSLOW, Sophany THACH, Gayani W. PINNAWALA, Christopher GRIFFITH, Harold Charles LINNEMEYER, Robert Neil TROTTER
  • Patent number: 11377586
    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: July 31, 2019
    Date of Patent: July 5, 2022
    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
  • Publication number: 20220145157
    Abstract: Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.
    Type: Application
    Filed: January 21, 2022
    Publication date: May 12, 2022
    Inventors: Sumitra Subrahmanyan, Gayani W. Pinnawala, Sophany Thach, Gregory A. Winslow, Dennis A. Alexis, Harold C. Linnemeyer, Timothy P. Theriot, Les Leszek Jackowski, Francesca Cibotti
  • Patent number: 11242739
    Abstract: Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: February 8, 2022
    Assignee: Chevron U.S.A. Inc.
    Inventors: Sumitra Subrahmanyan, Gayani W. Pinnawala, Sophany Thach, Gregory A. Winslow, Dennis Arun Alexis, Harold Charles Linnemeyer, Timothy Peter Theriot, Les Leszek Jackowski, Francesca Cibotti
  • Publication number: 20210395602
    Abstract: Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The viscosity reducer is buffered at a pH of 7 or less (e.g., at a pH of from 2 to 7, such as at a pH of from 3.5 to 7, or at a pH of from 5 to 7). The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid.
    Type: Application
    Filed: October 22, 2019
    Publication date: December 23, 2021
    Inventors: Sujeewa S. PALAYANGODA, Kerry Kennedy SPILKER, Sumitra SUBRAHMANYAN, Gayani W. PINNAWALA, Sophany THACH, Gregory A. WINSLOW, Dennis Arun ALEXIS, Harold Charles LINNEMEYER, Timothy P. THERIOT, Les Leszek JACKOWSKI, Francesca CIBOTTI
  • Publication number: 20210179930
    Abstract: Disclosed herein are methods and composition for breaking foam, emulsions, or any combination thereof.
    Type: Application
    Filed: December 14, 2020
    Publication date: June 17, 2021
    Inventors: Gayani W. PINNAWALA, Sujeewa S. PALAYANGODA, Varadarajan DWARAKANATH, Mohamad SALMAN, Mohsen S. TAGAVIFAR
  • Publication number: 20200123889
    Abstract: Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.
    Type: Application
    Filed: October 22, 2019
    Publication date: April 23, 2020
    Inventors: Sumitra Subrahmanyan, Gayani W. Pinnawala, Sophany Thach, Gregory A. Winslow, Dennis Arun Alexis, Harold Charles Linnemeyer, Timothy Peter Theriot, Les Leszek Jackowski, Francesca Cibotti
  • Publication number: 20200056087
    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: July 31, 2019
    Publication date: February 20, 2020
    Inventors: Nabijan NIZAMIDIN, Gayani W. PINNAWALA, Guo-Qing TANG, Varadarajan DWARAKANATH, Gregory A. WINSLOW, Jordan Taylor Isbell, Taimur Malik