Purpose of sucker rod: The sucker rod is an important component of rod pumping equipment. The sucker rod is connected into a sucker rod string through a coupling. The upper part is connected to the pumping unit through a polished rod, and the lower part is connected to the plunger of the Pumpjack. Its function is to transmit the reciprocating motion of the horsehead suspension point of the surface pumping unit to the downhole Pumpjack.
Sucker rod structure: The ordinary sucker rod body is a solid circular cross-section steel rod, with both ends being upset rod heads. The rod head is composed of an external threaded joint, a unloading groove, a push bearing shoulder, a wrench square diameter, a flange, and an arc transition zone. The external threaded joint is used to connect with the coupling, and the square diameter of the wrench is used to load and unload the sucker rod joint, which is used to clamp the sucker rod clamp.