An instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter.
测试流体粘度的一种仪器，在实验中使流体在已知压力梯度或流速情况下流过已知直径的一段试管。
2
Through large amount of lab experiments, the relation of oil boundary layer thickness with capillary radius, pressure gradient, fluid viscosity and its composition has been discussed.
通过大量的室内实验，探讨了原油边界层厚度与毛管半径、压力梯度、流体粘度和组分的关系。
3
The paper introduces a method that utilizes viscosity diagram to determine viscosity under any speed gradient. The viscosity defined is more close to the practical condition of well bore.