Patents by Inventor Daniel H. Longwell, Jr.

Daniel H. Longwell, Jr. 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).

  • Tensioner assembly
    Patent number: 7654327
    Abstract: A tensioner assembly for moveably carrying a conductor that communicates from a wellhead to a piece of well access equipment on a rig. The tensioner assembly includes a support frame, at least one hydraulic cylinder connected to the support frame, and at least one primary accumulator in fluid communication with the hydraulic cylinder.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: February 2, 2010
    Assignee: ATP Oil & Gas Corporation
    Inventors: Robert Magee Shivers, III, David Trent, Daniel H. Longwell, Jr.