An anti-
airlock oil well pump can normally work in a high gas-oil-ratio
oil well, associated gas and dissolved gas in the
oil well will not make the pump locked by itself. The oil well pump comprises an upper cylindrical pump cylinder, a gas and liquid exchange cavity and a lower pump cylinder, an upper traveling valve, a
piston and a lower traveling vale are arranged in the whole pump cylinder and connected in sequence, and a
sucker rod is connected to the top end of the upper traveling valve; a spherical oil
inlet valve is arranged in the center of the bottom end of the lower pump cylinder. The gas and liquid exchange cavity arranged between the upper pump cylinder and the lower pump cylinder is cylindrical, the
piston arranged in the whole pump cylinder is matched with the inner surface of the upper pump cylinder and the inner surface of the lower pump cylinder for sealing, and annular space is formed between the
piston and the inner surface of the gas and liquid exchange cavity. The anti-
airlock oil well pump has the advantages that
airlock of the oil well pump can be prevented, the fullness coefficient of the oil well pump is effectively increased, and the pump efficiency is improved; the oil well pump is used in the high gas-oil-ratio oil well for pumping oil, gas enters an upper pump and an oil
pipe through the exchange cavity so that the
specific gravity of a
liquid column in the oil
pipe is lowered, blowing is induced, spraying can be performed with pumping, and the yield is increased.