Tige de succion
16/05/2025
Tige de succion
The sucker rod, as the core component of pumping wells, forms a rod string via couplings. Its upper end connects to the pumping unit or screw pump motor, while the lower end attaches to the plunger of the downhole pump, primarily serving the function of power transmission. Manufactured predominantly from 30CrMoA alloy steel, it complies with the API 11B and SY/T 5029-2013 standards. Mechanical performance grades include six classifications: C, D, K, KD, HL, and HY. Under extreme operating conditions, the rod string endures alternating loads and corrosive media, leading to susceptibility to fatigue fracture. Approximately 90% of global rod-pumped wells utilize conventional steel sucker rods, with diameters ranging from 16 mm to 28.58 mm (1-1/8 inches) and standard lengths of 7.62 m to 9.14 m (25–30 ft)
