The product meets the API standard and has obtained the national invention patent certificate,(certificate number: ZL 2019 1 1223886.5). This product is a new type of internal blowout preventer.During normal drilling, the valve is open and the drilling fluid can circulate smoothly. In case of kick or blowout, the valve is closed to prevent blowout. During tripping operation, the backflow of drilling fluid is effectively prevented, and the sediment is prevented from entering the drill string to prevent plugging. It is a good special tool for blowout and plugging prevention in drilling operation.

The structure of the product is reasonable, which completely overcomes the fatal defects of the domestic similar products, such as easy erosion failure and short service life, and ensures that theproduct has good safety protection effect in the whole process of drilling