Patents by Inventor Raymond Brett Chandler

Raymond Brett Chandler 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).

  • Fast make-up fatigue resistant rotary shouldered connection
    Patent number: 7455329
    Abstract: A thread form having improved strength and fatigue resistance. The root of the thread may be cut on multiple cutting radii having displaced centers. At least two of the root surfaces formed by cutting radii may have lengths that are greater than the root truncation. The threads may be used in a double start configuration to increase the connection strength and reduce makeup and breakout rotations.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: November 25, 2008
    Assignee: Grant Prideco, L.P.
    Inventors: Andrei Muradov, Raymond Brett Chandler, James W. Breihan