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