Patents by Inventor Steven W. Derr

Steven W. Derr 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).

  • Apparatus, method, and system for measuring relative permeability of immiscible fluids
    Patent number: 10197490
    Abstract: An apparatus for measuring volumes of two or more immiscible fluids, a lighter fluid and a heavier fluid, in a core sample includes a fluid separator and two volume pressure actuators. The lighter fluid accumulates in an upper portion of the fluid separator and the heavier fluid accumulates in a lower portion of the fluid separator, with a meniscus forming between the lighter fluid and the heavier fluid. The first and second volume pressure actuators have fluid volume encoders that determine a net volumetric flow of the fluids to and from the fluid separator. The first and second volume pressure actuators also collectively maintain constant back pressure on the fluid separator and maintain the meniscus between the two immiscible fluids in the fluid separator at a constant position.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: February 5, 2019
    Assignee: DCI CORPORATION
    Inventors: Christopher F. Johnson, Christopher Scott Johnson, Andrew C. Johnson, Steven W. Derr
  • APPARATUS, METHOD, AND SYSTEM FOR MEASURING RELATIVE PERMEABILITY OF IMMISCIBLE FLUIDS
    Publication number: 20160356694
    Abstract: An apparatus for measuring volumes of two or more immiscible fluids, a lighter fluid and a heavier fluid, in a core sample includes a fluid separator and two volume pressure actuators. The lighter fluid accumulates in an upper portion of the fluid separator and the heavier fluid accumulates in a lower portion of the fluid separator, with a meniscus forming between the lighter fluid and the heavier fluid. The first and second volume pressure actuators have fluid volume encoders that determine a net volumetric flow of the fluids to and from the fluid separator. The first and second volume pressure actuators also collectively maintain constant back pressure on the fluid separator and maintain the meniscus between the two immiscible fluids in the fluid separator at a constant position.
    Type: Application
    Filed: May 16, 2016
    Publication date: December 8, 2016
    Applicant: DCI Corporation
    Inventors: Christopher F. Johnson, Christopher Scott Johnson, Andrew C. Johnson, Steven W. Derr