Patents by Inventor Iain D. COATES

Iain D. COATES 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).

  • Tubing tester valve and associated methods
    Patent number: 11174705
    Abstract: A valve assembly can include a flow passage extending between an uphole end and a downhole end of the valve assembly, a flapper that pivots between an open position and a closed position, and a pump operable to pivot the flapper, the pump being positioned between the flapper and the downhole end. A method of testing a completion tubing string can include increasing pressure in the completion tubing string while a closure member of a valve assembly is in a closed position, thereby testing a pressure integrity of the completion tubing string on an uphole side of the closure member, and transmitting a pressure signal via a flow passage to a pressure sensor of the valve assembly, thereby causing the closure member to displace to an open position, the pressure sensor being connected to an electronic circuit positioned on a downhole side of the closure member.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: November 16, 2021
    Assignee: Weatherford Technology Holdings, LLC
    Inventors: Iain D. Coates, Mark K. Presslie, Paul Day
  • TUBING TESTER VALVE AND ASSOCIATED METHODS
    Publication number: 20200347699
    Abstract: A valve assembly can include a flow passage extending between an uphole end and a downhole end of the valve assembly, a flapper that pivots between an open position and a closed position, and a pump operable to pivot the flapper, the pump being positioned between the flapper and the downhole end. A method of testing a completion tubing string can include increasing pressure in the completion tubing string while a closure member of a valve assembly is in a closed position, thereby testing a pressure integrity of the completion tubing string on an uphole side of the closure member, and transmitting a pressure signal via a flow passage to a pressure sensor of the valve assembly, thereby causing the closure member to displace to an open position, the pressure sensor being connected to an electronic circuit positioned on a downhole side of the closure member.
    Type: Application
    Filed: April 30, 2019
    Publication date: November 5, 2020
    Inventors: Iain D. COATES, Mark K. PRESSLIE, Paul DAY