Patents by Inventor Vijay Shrivastava

Vijay Shrivastava 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).

  • Toe-to-heel waterflooding with progressive blockage of the toe region
    Patent number: 7328743
    Abstract: A modified toe-to-heel waterflooding (TTHW) process is provided for recovering oil from a reservoir in an underground formation. After establishing the conventional TTHW waterflood, the process includes placing a chemical blocking agent at the watered out producing toe portion of the horizontal leg of the production well to create a blockage in the producing toe portion and to create a new producing toe portion in an open portion of the horizontal leg adjacent the blockage through which most of the production takes place. Production is then continued through the new producing toe portion and the open portion of the horizontal leg of the production well. These blocking and producing steps can be continued to progressively block producing toe portions in a direction toward the vertical pilot portion of the production well.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: February 12, 2008
    Assignee: Alberta Research Council, Inc.
    Inventors: Alex Turta, Fred Wassmuth, Vijay Shrivastava, Ashok Singhal
  • Toe-To-Heel Waterflooding With Progressive Blockage Of The Toe Region
    Publication number: 20070068674
    Abstract: A modified toe-to-heel waterflooding (TTHW) process is provided for recovering oil from a reservoir in an underground formation. After establishing the conventional TTHW waterflood, the process includes placing a chemical blocking agent at the watered out producing toe portion of the horizontal leg of the production well to create a blockage in the producing toe portion and to create a new producing toe portion in an open portion of the horizontal leg adjacent the blockage through which most of the production takes place. Production is then continued through the new producing toe portion and the open portion of the horizontal leg of the production well. These blocking and producing steps can be continued to progressively block producing toe portions in a direction toward the vertical pilot portion of the production well.
    Type: Application
    Filed: September 22, 2006
    Publication date: March 29, 2007
    Applicant: ALBERTA RESEARCH COUNCIL, INC.
    Inventors: Alex Turta, Fred Wassmuth, Vijay Shrivastava, Ashok Singhal