Inside blowout preventer is a quick wellhead preventer.when well kick or blowout occurs, the inner blowout preventer is connected to the top of drill string in order to control well kick or blowout. Type O.D.(mm) Connection (Mpa)Working pressure FJ89 89 NC26 35 70 FJ105 105 NC 31 35 70 FJ127 127 NC 38 35 70 FJ168 168 NC 50 35 70
