Patents by Inventor James W. Agnew

James W. Agnew 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).

  • Liner hanger assembly
    Patent number: 5181570
    Abstract: A liner hanger and setting tool in which the liner hanger has an expander cone with a rotational clearance space relative to a suporting member and a low friction contacting surface for alleviating binding and frictional forces on the supporting member and where the liner hanger has spaced apart spline housings which cooperate with spline keys on a setting tool to determine rotational torque prior to and during cementing operations and where the release of the setting tool from the liner hanger can be determined prior to cementing.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: January 26, 1993
    Assignee: MWL Tool Company
    Inventors: Roger P. Allwin, James W. Agnew