Hollow sucker rod is a key tool to extract the crude oil with high viscosity, high freezing point and high wax. It is designed with special middle hollow character, and fill the chemical medicament in the well, or put the electric heater under the well, so as to heat the crude oil in the well tube, then prevent the wax come into being, and enhance its liquidity. We can supply two types of hollow sucker rods, i. e. Coupling Connection Forging Type and Direct Connection Forging Type. The hollow sucker rod grades include grade C, D and H.
