Patents by Inventor John Joseph Johnson

John Joseph Johnson 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).

  • Positive indication system for well annulus cement displacement
    Patent number: 6668923
    Abstract: An annulus collar around a well production tube is cast in cement by a procedure that axially delineates the collar between two expandable well packers in the production tube string. Between the packers are a pair of cementing valves. An ingress valve is most proximate to the lower packer whereas an egress valve is most proximate to the upper packer. Additionally, the egress valve is modified to enclose the egress valve with a screen having mesh or slot openings that correspond with a screen plugging material that is mixed with the cement.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: December 30, 2003
    Assignee: Baker Hughes Incorporated
    Inventors: Ray P. Vincent, John Joseph Johnson
  • Positive indication system for well annulus cement displacement
    Publication number: 20020174985
    Abstract: An annulus collar around a well production tube is cast in cement by a procedure that axially delineates the collar between two expandable well packers in the production tube string. Between the packers are a pair of cementing valves. An ingress valve is most proximate to the lower packer whereas an egress valve is most proximate to the upper packer. Additionally, the egress valve is modified to enclose the egress valve with a screen having mesh or slot openings that correspond with a screen plugging material that is mixed with the cement.
    Type: Application
    Filed: April 23, 2002
    Publication date: November 28, 2002
    Applicant: Baker Hughes Incorporated
    Inventors: Ray P. Vincent, John Joseph Johnson