Patents by Inventor Alan Larnach

Alan Larnach 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).

  • Subsurface safety valve and method for chemical injection into a wellbore
    Patent number: 8056637
    Abstract: A subsurface safety valve is modified to permit the passage of a downhole treatment chemical through the valve while bypassing a valve closure member which is maintained within the safety valve in operative condition.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: November 15, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventor: Alan Larnach
  • SUBSURFACE SAFETY VALVE FOR CHEMICAL INJECTION
    Publication number: 20100108320
    Abstract: A subsurface safety valve is modified to permit the passage of a downhole treatment chemical through the valve while bypassing a valve closure member which is maintained within the safety valve in operative condition.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 6, 2010
    Inventor: Alan Larnach