Generally, flow at high velocity around well bore in gas well is belong to non-Darcian flow which arising adding pressure drop.
2
对比实验结果表明，加装减阻杆的根数不同，压降的降低幅度也不同，最大降低幅度达50%以上。
Compared with experimental research, it is found that different number of sticks results in different pressure drops with the most scope 50% or above.
3
在射孔径向流和井筒径向流中，推导出了机械表皮因子和非达西流影响引起的附加压力降的表达式。
Formulae were derived to predict additional pressure drops due to mechanical skin and non-Darcy effect in the perforation radial flow and wellbore radial flow.
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