Sucker rod is thin rod of pumping Wells, the polished rod on it, under the pump ACTS as transmission power. Rod: the kinds of sucker rod joint length is 6 meters, material is generally high carbon steel surface hard chromium plating, within the tubing were connected with internal thread straps stretches to the underground reservoir on the piston of oil pump through the reciprocating motion. Normal sucker rod: C, D, K, KD sucker rod. High strength sucker rod: class H, divided into two types, HY and HL. Special sucker rod, hollow sucker rod, steel rod. Continuous sucker rod: steel rod. Screw pump: special sucker rod taper thread rod, the plugging type rod. Reinforced plastic fiberglass sucker rod, fiber reinforced plastic rod. The flexible sucker rod: carbon fiber composite sucker rod, wire rope sucker rod. Other types of sucker rod: electric heating sucker rod.