小井眼水力参数的实质就是在较低环空压耗的情况下,保证具有良好的携岩能力。文中介绍了几种常用的流变方程,分析了小井眼环空压耗的特点,提供了在作业时应采取的对策。 The essence of the slimhole hydraulic parameters is to ensure that it has good rock carrying capacity under the circumstance of lower annulus pressure. In this paper, several commonly used rheological equations are introduced, and the characteristics of annular well pressure loss in slim hole are analyzed, and the countermeasures to be taken during operation are provided.