Results show that the frictionalfactor almost has nothing to do with applied forces, but increases linearly with the sliding speed between the tooth faces.
Modified factor of frictional coefficient of different sections of designed path of one field or area is obtained by statistical computing and analysis of more Wells.
由多口井数据的统计计算和分析，可得某一油田或区块的水平井设计轨道各井段的摩阻因数放大因数。
3
The frictional resistance factor increases with the increase of the flow velocity, decreases with the increase of temperature and its variation law with the pressure is complicated.