Patents by Inventor Calum Maxwell Stirling

Calum Maxwell Stirling 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).

  • Subsea pump system
    Patent number: 9234400
    Abstract: A subsea pump system is adapted to close a hydraulic ram of a blowout preventer. The subsea pump system has at least a first pump and a second pump configured to pump drive fluid from a source to the hydraulic ram. The system has a controller configured to automatically select at least one of the first and second pumps for pumping the drive fluid wherein at least the first pump is selected at a lower fluid pressure range and at least the second pump is selected at a higher fluid pressure range. A method of operating a pump system and an intervention skid for a pump system are also described.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: January 12, 2016
    Assignee: Subsea 7 Limited
    Inventors: Roger Warnock, Jr., Calum Maxwell Stirling, James Colley, Alan William Doe
  • PUMP SYSTEM
    Publication number: 20140124211
    Abstract: A subsea pump system is adapted to close a hydraulic ram of a blowout preventer. The subsea pump system has at least a first pump and a second pump configured to pump drive fluid from a source to the hydraulic ram. The system has a controller configured to automatically select at least one of the first and second pumps for pumping the drive fluid wherein at least the first pump is selected at a lower fluid pressure range and at least the second pump is selected at a higher fluid pressure range. A method of operating a pump system and an intervention skid for a pump system are also described.
    Type: Application
    Filed: March 8, 2012
    Publication date: May 8, 2014
    Inventors: Roger Warnock, JR., Calum Maxwell Stirling, James Colley, Alan William Doe