دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

the valve on the side of the tree that controls access to the annulus.

n: the conbul valves, pressure gauges, and chokes assembled at the top of a well to control the flow of oil and gas after the well has been drilled and completed. It is used when reservoir pressure is sufficient to cause reservoir fluids to flow to the surface.

n: The set of valves, spools and fittings connected to the top of a well to direct and control the flow of formation fluids from the well.


the control sections that sits above the basic wellhead. It may contain hangers, master valves, annular valves, wing valves, and gauges or pressure, flow rate or monitoring measurement equipment.

n: operates on the same principle as an annular valve, except it requires pipe rotation for opening and closing operations.