Definition(s)
Subsurface-controlled Subsurface Safety Valve SSCSV
SSSV actuated by the characteristics of the well itself
Note 1 to entry: Note 1 to entry: These devices are usually actuated by the differential pressure through the
SSCSV (velocity type) or by tubing pressure at the SSCSV (high or low pressure type).
[SOURCE: ISO 14723]
Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards