Hollow sucker rod is a kind of sucker rod with a middle runner, It endows some feature: injecting a variety of chemicals and heat oil through the inner hole to reduce the viscosity of crude oil, control of oil well paraffinning and increase pump efficiency, small flow, fast speed, not easy to deposit sand, so it is used for sand oil well. It can be matching used with ductless pump to replace oil pipeline, strong resisting twisting capacity, can drive screw pump.
The model and main parameter of hollow pumping rod as belows: