The purpose of the Safety valves is to protect people, environment and property from uncontrolled production.
- SSV: Surface Safety Valves: an automatic fail-safe closed valve fitted at the wellhead.
- SSSV: Subsurface Safety Valve: a valve installed in the tubing down the well to prevent uncontrolled flow in case of an emergency through the tubing when actuated. These valves can be installed by wireline or as an integral part of the tubing. Subsurface Valves are usually . . .
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