Patents by Inventor Eric E. Andersen

Eric E. Andersen 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 wellbore sand control
    Patent number: 5505260
    Abstract: The present invention provides a single trip system for placing perforating apparatus and sand control equipment in a wellbore. This system includes a casing string equipped with extendible pistons and a pumpable activator plug for extending the pistons. Additionally, this system utilizes a single gravel-pack and completion tool string. Further, this system includes a means for opening the extendible pistons to fluid flow.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: April 9, 1996
    Assignee: Conoco Inc.
    Inventors: Eric E. Andersen, Larry K. Moran, Richard M. Hodge, Nobuo Morita