Beam -pumping unit blowout preventer

The utility model discloses a beam -pumping unit blowout preventer, including ground, the inside on ground is equipped with the oil well, the inside of oil well is equipped with oil pipe, the inboardsliding connection of opening of oil well has first drum, the even welding in the outside of first drum has the mounting panel, the mounting panel passes through the inserted bar embedding with groundto be fixed, the inside of first drum is equipped with the ring channel, the inboard sliding connection of ring channel has the arc piece, the inboard of first drum is hugged closely there is the second drum, the surface of support fixed connection second drum is passed through on the surface of arc piece, and oil pipe's surface is cup jointed to inboard slip of second drum, the inside of seconddrum is equipped with first annular chamber. This beam -pumping unit blowout preventer is through the rotation of second drum for mud can throw away through the discharge opening centrifugation, thereby guarantees the mud in th