Patents by Inventor Peter Stewart Martin-Marshall

Peter Stewart Martin-Marshall 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).

  • Rotating diverter head
    Patent number: 7308954
    Abstract: A rotating diverter head for use on a blow out preventer stack of an oil, gas or geothermal well. While providing for sealing and rotation of a drill pipe through the head, the head additional includes a flange on which the head is rotatable. The flange connects the head to the stack whereupon it can be rotated to align a return flow line before being locked in position.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: December 18, 2007
    Assignee: Stacey Oil Services, Ltd.
    Inventor: Peter Stewart Martin-Marshall