Definition(s)
Surface-controlled Subsurface Safety Valve SCSSV
SSSV controlled from the surface by hydraulic, electrical, mechanical or other means
Note 1 to entry: The SCSSV is sometimes called DHSV (downhole safety valve).
[SOURCE: ISO 14723]
Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards