小排量高扬程潜油直驱螺杆泵研制与应用

针对大庆油田外围采油厂举升扬程在1 800 m以内的低产深井存在泵效低、杆管偏磨严重、举升能耗高等问题,通过对前期潜油直驱螺杆泵机组优化升级,研制出小排量高扬程潜油直驱螺杆泵.室内试验得出,优化后的机组在额定转速300 r/min条件下、举升压力19 MPa以内,泵效均能达到60％以上.现场应用表明,该直驱螺杆泵比抽油...

Development and Application of Small Displacement andHigh Head Submersible Direct-drive Screw Pump

Aiming at the problems of low-yield deep wells with a lifting head within 1800 m in the peripheral oil production plant in Daqing, there are problems such as low pump efficiency, serious rod and tube eccentric wear, and high lifting energy consumption. By optimizing and upgrading the early submersible direct drive screw pump unit, a small displacement and high head submersible direct drive screw pump was developed. According to indoor experiments, the optimized unit can reach more than 60% pump efficiency under the condition of the rated speed of 300 r/min and the lifting pressure within 19 MPa.The field application shows that compared with the pumping unit, it has a better lifting effect. The average pump efficiency has been increased by 48.65%, and the maximum energy saving rate per ton of liquid per 100 meters has reached 65.61%. The matched oil pipe internal wax removal system eliminates the combination of regular chemical dosing and hot washing to remove wax, and the wax is removed promptly and the cost of wax removal is low. It can be seen that the development of the small displacement high-lift submersible direct-drive screw pump not only completely solves the problem of rod and tube eccentric wearing in the lifting process, but also can meet the high-efficiency exploitation of low-yield deep wells with a lifting head within 1 800 m.