دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a small hydraulic line used to run fluid from the surface to a downhole tool, such as a subsurface safety valve.

a small diameter line, usually attached to the outside of tubing, which controls the ScSSV or other downhole tools.

injection subsurface safety valve.

n: a device that controls the rate of flow of fluid in a line or opens or shuts off the flow of fluid completely. When open, the sealing surface of the valve is moved away from a seat;when closed, the sealing surface contacts the seat to shut off flow. The direction of movement of the valve is usually perpendicular to the seat. Poppet valves are used extensively as pneumatic (air) controls on drilling rigs and as intake and exhaust valves in most intemalcombustion engines.

a type of valve common on early subsurface safety valves, where higher than expected flow through an orifice can move a round ball onto a sealing surface and stops the flow.

n: 1. an automatic valve that opens or closes when an abnormal condition occurs (e.g., a pressure relief valve on a separator that opens if the pressure exceeds the set point, or the shutdown valve at the wellhead that closes if the line pressure becomes too high or too low). 2. a valve installed at the top of the drill stem to prevent flow out of the drill pipe if a kick occurs during tripping operations.

various. Generally used in describing a surface or subsurface safety valve.

abbr: surface-controlled subsurface safety valve.

surface controlled subsurface safety valve.

subsurface safety valve.

abbr: surface safety valve.

surface safety valve (subsurface safety valve is SSSV)

a downhole safety valve designed to close when the flow rate reaches a preset level as measured by a pressure drop across a valve.

n: the environment below the surface of the earth;groundwater, deep water, underground formations, etc. subsurface geology n: the study of rocks that lie beneath the surface of the earth. subsurface safety valve n: see tubing safety valve.

a downhole safety valve designed to shut the well in case of surface damage to the wellhead.