Based on the balance of the fluid in the pipeline and the annular space,I study the pressure of the hole in the bottom and the pressure loss of the both under the laminar flow condition.

• 以泡沫钻进管路中、环形空间中的流体受力平衡为依据,对层流状态下的孔底压力及两者的压力损失进行初步的理论研究,通过验证,与实测值拟合较好。