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鉴于螺杆泵适用于泵送高黏、磨蚀性流体的特性,使得该种机采方式在重油冷采的生产井中得到广泛应用。然而,对于热力采油措施井来说,常规螺杆泵因定子使用的是橡胶制品,故显现出其对160℃以上高温的不适应性。一种可避免橡胶老化的全金属螺杆泵得以研发。2005年初,对全金属泵在温度大于200℃的超重原油介质中进行了有效性测试。当泵速350r/min时,压力升至75bar,排量达到260m3/d。这种金属螺杆泵的排量范围高达1000m3/d。
In view of the screw pump for pumping high viscosity, abrasive fluid characteristics, making the machine mining methods in the heavy oil cold production wells have been widely used. However, for conventional oil recovery wells, conventional screw pumps use rubber products due to their stator, so they show an incompatibility to temperatures above 160 ° C. A kind of all-metal screw pump that can avoid rubber aging is developed. In early 2005, all-metal pumps were tested for their effectiveness in overweight crude oil media at temperatures greater than 200 ° C. When the pump speed 350r / min, the pressure rose to 75bar, displacement of 260m3 / d. This metal screw pump displacement range up to 1000m3 / d.