Patents by Inventor Oluwasijibomi O. Okeowo

Oluwasijibomi O. Okeowo 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).

  • Use of gas-separation membranes to enhance production in fields containing high concentrations of hydrogen sulfides
    Patent number: 8869890
    Abstract: A method and system for processing produced fluids from a subterranean reservoir is disclosed. The system comprises: (a) a separator for separating produced fluids from a subterranean reservoir into associated gases, water and crude oil, (b) a membrane which receives at least a portion of the associated gases containing the hydrogen sulfide and separates the gas into a permeate stream enriched in hydrogen sulfide and carbon dioxide and a retentate stream depleted in hydrogen sulfide and carbon dioxide; (c) an amine unit for removing carbon dioxide and hydrogen sulfide from the retentate stream; and (d) a sour gas injection unit for injecting at the permeate stream in an underground formation.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 28, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventors: Daniel Chinn, Jen Kai Chen, James Ong, Minquan Cheng, Oluwasijibomi O. Okeowo
  • Crosslinked polyimide membrane, method for making the same using organic titanate catalysts to facilitate crosslinking and method of using the membrane for fluid separation
    Patent number: 8337586
    Abstract: A method of making a crosslinked polyimide membrane is described. A monoesterified membrane is formed from a monoesterified polyimide polymer. The monoesterified membrane is subjected to transesterification conditions to form a crosslinked membrane. The monoesterified membrane is incorporated with an organic titanate catalyst before or after formation of the monoesterified membrane. A crosslinked polyimide membrane made using the aforementioned method and a method of using the membrane to separate fluids in a fluid mixture, such as methane and carbon dioxide, are also disclosed.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: December 25, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: John D. Wind, Stephen J. Miller, Oluwasijibomi O. Okeowo
  • CROSSLINKED POLYIMIDE MEMBRANE, METHOD FOR MAKING THE SAME USING ORGANIC TITANATE CATALYSTS TO FACILITATE CROSSLINKING AND METHOD OF USING THE MEMBRANE FOR FLUID SEPARATION
    Publication number: 20120241996
    Abstract: A method of making a crosslinked polyimide membrane is described. A monoesterified membrane is formed from a monoesterified polyimide polymer. The monoesterified membrane is subjected to transesterification conditions to form a crosslinked membrane. The monoesterified membrane is incorporated with an organic titanate catalyst before or after formation of the monoesterified membrane. A crosslinked polyimide membrane made using the aforementioned method and a method of using the membrane to separate fluids in a fluid mixture, such as methane and carbon dioxide, are also disclosed.
    Type: Application
    Filed: June 6, 2012
    Publication date: September 27, 2012
    Applicant: Chevron U.S.A. Inc.
    Inventors: John D. Wind, Stephen J. Miller, Oluwasijibomi O. Okeowo
  • Crosslinked polyimide membrane, method for making the same using organic titanate catalysts to facilitate crosslinking and method of using the membrane for fluid separation
    Patent number: 8221531
    Abstract: A method of making a crosslinked polyimide membrane is described. A monoesterified membrane is formed from a monoesterified polyimide polymer. The monoesterified membrane is subjected to transesterification conditions to form a crosslinked membrane. The monoesterified membrane is incorporated with an organic titanate catalyst before or after formation of the monoesterified membrane. A crosslinked polyimide membrane made using the aforementioned method and a method of using the membrane to separate fluids in a fluid mixture also are described.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: July 17, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: John D. Wind, Stephen J. Miller, Oluwasijibomi O. Okeowo
  • USE OF GAS-SEPARATION MEMBRANES TO ENHANCE PRODUCTION IN FIELDS CONTAINING HIGH CONCENTRATIONS OF HYDROGEN SULFIDES
    Publication number: 20120168154
    Abstract: A method and system for processing produced fluids from a subterranean reservoir is disclosed. The system comprises: (a) a separator for separating produced fluids from a subterranean reservoir into associated gases, water and crude oil, (b) a membrane which receives at least a portion of the associated gases containing the hydrogen sulfide and separates the gas into a permeate stream enriched in hydrogen sulfide and carbon dioxide and a retentate stream depleted in hydrogen sulfide and carbon dioxide; (c) an amine unit for removing carbon dioxide and hydrogen sulfide from the retentate stream; and (d) a sour gas injection unit for injecting at the permeate stream in an underground formation.
    Type: Application
    Filed: December 20, 2011
    Publication date: July 5, 2012
    Applicant: Chevron U.S.A. Inc.
    Inventors: Daniel Chinn, Jen Kai Chen, James Ong, Minquan Cheng, Oluwasijibomi O. Okeowo
  • CROSSLINKED POLYIMIDE MEMBRANE, METHOD FOR MAKING THE SAME USING ORGANIC TITANATE CATALYSTS TO FACILITATE CROSSLINKING AND METHOD OF USING THE MEMBRANE FOR FLUID SEPARATION
    Publication number: 20090165645
    Abstract: A method of making a crosslinked polyimide membrane is described. A monoesterified membrane is formed from a monoesterified polyimide polymer. The monoesterified membrane is subjected to transesterification conditions to form a crosslinked membrane. The monoesterified membrane is incorporated with an organic titanate catalyst before or after formation of the monoesterified membrane. A crosslinked polyimide membrane made using the aforementioned method and a method of using the membrane to separate fluids in a fluid mixture, such as methane and carbon dioxide, are also disclosed.
    Type: Application
    Filed: December 31, 2007
    Publication date: July 2, 2009
    Inventors: John D. Wind, Stephen J. Miller, Oluwasijibomi O. Okeowo