Equivalent Circulating Density (ECD)
10 November 2021
Global Positioning Satellite (GPS)
10 November 2021

Full-Opening Safety Valve (FOSV)

Ball valves designed for high-pressure conditions, capable of holding pressure from both directions. The term “full opening” originates from when the ball valve is opened; the flow path has a smooth inside diameter.  It does not mean that the valve’s ID is the same as the drill pipe’s ID.