Patents by Inventor David KNELL

David KNELL 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).

  • Automatic dump valve and method of operating an inflatable packer
    Patent number: 10174580
    Abstract: A hydraulic dump valve (10) for use with an inflatable packer (38) in a downhole (32) installation. The hydraulic dump valve (10) includes disc springs (102, 118) to adjust the pressure of operation of the valve (10) to allow use of liquid operated packers (38) in boreholes (32) with low static water levels by isolating the hydrostatic pressure in an inflation line (51) from the packers (38) and at the same time provide communication from the inflatable packer (38) to the well annulus (30) to allow downhole deflation of the packer (38).
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: January 8, 2019
    Assignee: Inflatable Packers International Pty Ltd
    Inventors: Clement Rowe, David Knell
  • Automatic Dump Valve
    Publication number: 20160258243
    Abstract: A hydraulic dump valve (10) for use with an inflatable packer (38) in a downhole (32) installation. The hydraulic dump valve (10) includes disc springs (102, 118) to adjust the pressure of operation of the valve (10) to allow use of liquid operated packers (38) in boreholes (32) with low static water levels by isolating the hydrostatic pressure in an inflation line (51) from the packers (38) and at the same time provide communication from the inflatable packer (38) to the well annulus (30) to allow downhole deflation of the packer (38).
    Type: Application
    Filed: October 23, 2014
    Publication date: September 8, 2016
    Inventors: Clement ROWE, David KNELL