Patents by Inventor Steven D. Matthews

Steven D. Matthews 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).

  • Publication number: 20130299175
    Abstract: A vacuum sub (8) for use in a well bore (12), the vacuum sub (8) having a cylindrical casing (28) with an upstream end (14) and a downstream end (16). The upstream and downstream ends (14, 16) are designed to attach to components of a downhole assembly (6) in a well bore (12). The vacuum sub (8) includes a port (18) in the cylindrical casing (28) that provides access between the inside (20) of the cylindrical casing (28) to the outside (22) of the cylindrical casing (28). The port (18) is angled so that when air passes through the port (18) from the inside (20) of the casing (28) to the outside (22) of the casing (28), the air is directed upwardly through the well bore (12) in an upstream direction, thereby creating a vacuum in the well bore (12) below the port (18).
    Type: Application
    Filed: September 12, 2012
    Publication date: November 14, 2013
    Applicant: ATD LLC dba Air Tech Drilling
    Inventor: Steven D. Matthews