Patents by Inventor John A Oxtoby

John A Oxtoby 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).

  • PORTED PACKER
    Publication number: 20130112408
    Abstract: Disclosed is a packer that is ported to provide fluid communication through the packer between the wellbore annulus above the packer and the wellbore annulus below the packer. Such a ported packer can be used to allow for pressure testing the casing and/or for controlling a failed well.
    Type: Application
    Filed: November 7, 2012
    Publication date: May 9, 2013
    Inventor: John A Oxtoby