Patents by Inventor Millard Lewis

Millard Lewis 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).

  • Patent number: 6533035
    Abstract: A method and apparatus for enhancing the production of newly developed water wells and existing wells that have suffered a reduction in capacity due to plugging. A gas line directs gas under pressure to a relief valve carried in the production string at a location in the production zone of the well. When the applied pressure reaches the pressure setting of the relief valve, the valve opens to apply air sidewardly in bursts which create shock waves to dislodge built up material from the well screen and the surrounding filter pack and formation fractures. Following each burst, the pressure conditions create a flushing effect which draws water back into the well along with the bacteria and particles that were dislodged. A submersible pump or airlift assembly in the production string then delivers the dislodged materials to the surface.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: March 18, 2003
    Assignee: Layne Christensen Company
    Inventors: James Troutt, Millard Lewis, Robert A. Ereth
  • Publication number: 20020153135
    Abstract: A method and apparatus for enhancing the production of newly developed water wells and existing wells that have suffered a reduction in capacity due to plugging. A gas line directs gas under pressure to a relief valve carried in the production string at a location in the production zone of the well. When the applied pressure reaches the pressure setting of the relief valve, the valve opens to apply air sidewardly in bursts which create shock waves to dislodge built up material from the well screen and the surrounding filter pack and formation fractures. Following each burst, the pressure conditions create a flushing effect which draws water back into the well along with the bacteria and particles that were dislodged. A submersible pump or airlift assembly in the production string then delivers the dislodged materials to the surface.
    Type: Application
    Filed: April 24, 2001
    Publication date: October 24, 2002
    Applicant: LAYNE CHRISTENSEN COMPANY
    Inventors: James Troutt, Millard Lewis, Robert A. Ereth