IBOP, the internal blowout preventer of top drive, is also called top drive cock. In oil and gas drilling, blowout is an accident that people don’t want to see on any drilling rig. Because it directly endangers the personal and property safety of the drilling crew and brings environmental pollution. Usually, high-pressure fluid (liquid or gas), especially gas with mud and gravel, will be ejected from the wellhead at an extremely high flow rate, forming a horrible scene of fireworks roaring. The root cause of the accident comes from the fluid between underground rock layers,