Patents by Inventor Andrei M. Muradov

Andrei M. Muradov 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: 7416374
    Abstract: A thread form having improved strength and fatigue resistance. The root of the thread is cut on multiple cutting radii having displaced centers. At least two of the root surfaces are formed by cutting radii having lengths that are greater than the root truncation. The threads are used in a double start configuration to increase the connection strength and reduce makeup and breakout rotations.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: August 26, 2008
    Assignee: Grant Prideco, L.P.
    Inventors: James W. Breihan, Andrei M. Muradov