... 6A Application:well drilling Material:forged steel/cast steel API single/ double ram blowout preventerStandard:API 6AApplication:well drillingMaterial:forged ... used in onshore and offshore drilling.Ram BOP, such as single ram BOP, double ram BOP, triple ram BOP,quadplex ... BOP is mainly composed of housing, side gate, hydro-cylinder, cylinder cap, piston, piston rod, lock shaft, sealing parts, ram, etc. ...