Rod oil sucker against blowout

The utility model relates to a rod type pump which can prevent gas and blowout. The utility model is mainly composed of an outer tube (22), a pull rod (23), a pump barrel (24), a piston (29), etc. Traveling valves are respectively arranged above and below the piston (29). The lower end of the pump barrel (24) is provided with a standing valve, and the inner parts of the upper and the lower traveling valve covers (25) and (30) and a standing valve cover (34) are composed of a plurality of cylinders. A gas preventing annular valve is arranged in an annular valve cover (4) on the upper part of the pump, and a blowout preventing one-way valve is arranged in a one-way valve body (41) on the lower part of the pump. The pump does not use special ground equipment, and can accomplish pump inspection operation without killing well. The utility model can effectively eliminate gas lock phenomena in oil pumping process, and the utility model is especially suitable for extracting crude oil with hyposmosis and high fuel-gas ratio by sucker rod pumps in oil wells containing sand and inclined wells.