Subsurface Safety Valve 1 (Sssv)
Subsurface Safety Valve 1 (Sssv) : (n.) Well Completions. A safety device installed in the upper wellbore to provide emergency closure of the producing conduits in the event of an emergency. Two types of subsurface safety valve are available: surface-controlled and subsurface controlled. In each case, the safety-valve system is designed to be fail-safe, so that the wellbore is isolated in the event of any system failure or damage to the surface production-control facilities. See: Surface-Controlled Subsurface Safety Valve (SCSSV)
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