In this paper the spiral velocity of eccentric annulus with inner pipe turned is analysed and computed.
本文分析计算了石油钻井工程偏心环空中内管转动的螺旋流动。
Computation of eccentric annular flowing on Bingham-fluid in pipe is approximate in many literatures and is not of universality.
在调研了大量关于宾汉流体偏心环状管流的文献之后，发现大都是近似计算而不具有普适性。
Pump inlet pipe diameter changes when level, should choose eccentric different-diameter pipe.
泵的水平入口管变径时，应选用偏心异径管。
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