1、井下螺桿泵的工況，即井筒流體進入敞開腔室的流量大小與敞開腔室的壓差和流體粘度等因素有關。1. the working conditi of the downhole screw pump， that is， the flow of the wellbore fluid into the open chamber， is related to the pressure difference of the open chamber&the viscosity of the fluid.ａ、壓差對工況的影響the effect of a&pressure difference on the working condition如果忽略流體的蒸汽壓力、井筒動液面和泵吸入口的摩阻損失，則打開一個敞開的腔室所建立的生產壓差為0.1mpa，螺桿泵通用配件，只要在吸入口及腔室之間的壓降小于形成一個腔室所建立的壓差，井筒流體將全部充滿腔室，則螺桿泵可以達到其理論攝排量。
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