Wellhead control system


A pressure control system 10 for an oil or gas well, comprising: a moveable member 105 moveable between an open configuration in which fluid is permitted to flow from a first region of the well 101 to a second region of the well 102, through passageway 108 and a closed configuration in which fluid flow from the first region to the second region is prevented, inlet 109 may be blocked; a biasing member 110, which may be a spring, configured to urge the moveable member towards the closed configuration; and a pressure controller, wherein the pressure controller is arranged to control a pressure that acts on the moveable member to urge the moveable member towards the closed configuration. The pressure controller may include a pressure sensor 103 and an isolation valve 104. There may also be a third closed configuration. Also claimed is an assembly comprising two pressure control systems 10 and also an oil or gas well comprising the pressure control system 10.




Download Full PDF Version (Non-Commercial Use)

Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    US-2014231092-A1August 21, 2014Hunting Energy Services, Inc.Annular Pressure Relief System
    US-2015369002-A1December 24, 2015Proserv Operations, Inc.Stacked shuttle valve

NO-Patent Citations (0)


Cited By (0)

    Publication numberPublication dateAssigneeTitle