Lubricating anti-overflow oil well head packing box pressing cap seal device

The utility model discloses a lubricating anti-overflow oil well head packing box pressing cap seal device which comprises at least two levels of packing boxes for sealing. The packing boxes are disposed above an eccentric hoop head. A lubricating device is disposed between the two levels of packing boxes. A guide pipe sequentially penetrates through the center of each of the upper-level packing box and the lower-level packing box. A packing pressing cap is buckled at the top of each level of packing box, and a gland is disposed in the packing box at the packing pressing cap. The lubricating device is a lubricating chamber with a grease feed inlet. A bidirectional horizontal rubber gate is disposed on the bottommost packing box. The lubricating anti-overflow oil well head packing box pressing cap seal device has the advantages of clean production, namely a well head is clean without leakage, overflow and piercing-caused leakage of the well head is prevented effectively, and pollution is reduced; high pertinen