Patents by Inventor Russell Alan Johnston

Russell Alan Johnston 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).

  • Publication number: 20130062071
    Abstract: A technique facilitates controlling flow in a wellbore with a simplified valve. The design of the valve also enables reduction in the overall length of the valve to improve spatial considerations. The valve comprises a valve component, e.g. a flapper, movable between a closed position and an open position. A flow tube is designed to selectively open the valve component with reduced travel, thus enabling a shortened flow tube. The short flow tube enables use of valve housings, springs, and other valve components having a reduced length.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 14, 2013
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Gary L. Rytlewski, Stephen Dennis Parks, Russell Alan Johnston, David James Biddick
  • Publication number: 20110253392
    Abstract: A technique enables control over flow in a wellbore with a flow control system. The flow control system combines a flow reduction mechanism with a flow control device, such as a valve. The flow reduction mechanism comprises a closure member which can be selectively moved between an unactuated and actuated position, allowing relatively greater flow through the flow control device in the unactuated position. The flow reduction mechanism actuates prior to or in conjunction with the flow control device to reduce flow and thus reduce the loading forces that would otherwise act against the flow control mechanism upon closure of the flow control device.
    Type: Application
    Filed: June 28, 2011
    Publication date: October 20, 2011
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Dwayne May, David McCalvin, Paul Gordon Goughnour, David James Biddick, Russell Alan Johnston
  • Patent number: 8002040
    Abstract: A technique enables control over flow in a wellbore with a flow control system. The flow control system combines a flow reduction mechanism with a flow control device, such as a valve. The flow reduction mechanism comprises a closure member which can be selectively moved between an unactuated and actuated position, allowing relatively greater flow through the flow control device in the unactuated position. The flow reduction mechanism actuates prior to or in conjunction with the flow control device to reduce flow and thus reduce the loading forces that would otherwise act against the flow control mechanism upon closure of the flow control device.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: August 23, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Dwayne May, David McCalvin, Paul Gordon Goughnour, David James Biddick, Russell Alan Johnston
  • Publication number: 20090266555
    Abstract: A technique enables control over flow in a wellbore with a flow control system. The flow control system combines a flow reduction mechanism with a flow control device, such as a valve. The flow reduction mechanism comprises a closure member which can be selectively moved between an unactuated and actuated position, allowing relatively greater flow through the flow control device in the unactuated position. The flow reduction mechanism actuates prior to or in conjunction with the flow control device to reduce flow and thus reduce the loading forces that would otherwise act against the flow control mechanism upon closure of the flow control device.
    Type: Application
    Filed: April 23, 2008
    Publication date: October 29, 2009
    Applicant: Schlumberger Technology Corporation
    Inventors: Dwayne MAY, David MCCALVIN, Paul Gordon GOUGHNOUR, David James BIDDICK, Russell Alan JOHNSTON