... 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 ... of ram assembly, makes the drilling tools have automatic centering function.5- The horizontal secondary seal equipment of side gate ...