Patents by Inventor Pilot Drilling Control Limited

Pilot Drilling Control Limited 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).

  • FLOW STOP VALVE
    Publication number: 20130220634
    Abstract: A flow stop valve (20) positionable in a downhole tubular (6), and a method, are provided. The flow stop valve (20) is in a closed position when a pressure difference between fluid outside the downhole tubular (6) and inside the downhole tubular (6) at the flow stop valve (20) is below a threshold value, thereby preventing flow through the downhole tubular. The flow stop valve (20) is in an open position when the pressure difference between fluid outside the downhole tubular (6) and inside the downhole tubular (6) at the flow stop valve (20) is above a threshold value, thereby permitting flow through the downhole tubular (6).
    Type: Application
    Filed: April 8, 2013
    Publication date: August 29, 2013
    Applicant: PILOT DRILLING CONTROL LIMITED
    Inventor: Pilot Drilling Control Limited