Coated anti-corrosion sucker rod with centralizing and sealing device

The utility model discloses a cladding type anti-corrosion sucker rod with a centralizing and sealing device, which comprises a female joint, a conventional sucker rod and a reducing joint which are connected in sequence, the middle part of the conventional sucker rod is a long straight rod body, the outer side of the long straight rod body is coated with a PE (polyethylene) cladding layer, and the diameter of the PE cladding layer is larger than that of the female joint. The upsetting parts at the two ends of the conventional sucker rod are respectively provided with a centralizing and sealing device in an injection molding mode. And the coating layer only covers the long straight rod body part of the rod body, so that the process control is simple. The uncoated parts at the two ends of the rod body are wrapped by a righting sealing device with supporting ribs in an injection molding mode, extend to the stainless steel female joint and the stainless steel reducing joint at the two ends respectively and are o