Patents by Inventor Carlos Walter Pardo

Carlos Walter Pardo 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).

  • Method and apparatus for reducing gas well production costs using improved downhole valves
    Patent number: 6032743
    Abstract: Methods and apparatus are disclosed for reducing lifting costs in a producing hydrocarbon well by injecting produced water into a set of injection perforations located lower in the well borehole from a set of production perforations. A plunger pump and a cage-ball valve system are placed above a production packer which is located between the production and injection perforations. The valve system and pump are arranged to take produced water from above the packer and pump into the injection perforations only on the downstroke of the rod string activated plunger pump.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: March 7, 2000
    Assignee: Texaco Inc.
    Inventors: Kevin Rush Bowlin, Howard Lee McKinzie, Carlos Walter Pardo