【摘要】 环空压耗是设计钻井水力参数的一个重要指标。文中在考虑了环空中岩屑颗粒存在不同运动形式的情况下，建立了水平井段环空压耗的理论和经验模式。利用现场两口水平井资料对经验模式进行了验证。结果表明，模式可用于大斜度井段和水平井段环空压耗的预测。更多还原

【Abstract】 Pressure Loss in annular space is the main index ofdrilling hydraulic pardrmeters. After considering cuttings mov-ing in different forms in the annular space,the papor bulids thetheoretical and regressive models of pressure loss in the hori-zontal well section. Verification is conducted on the regressivemodel by utilizing the data of two horizontal wells. Resultsskow that the model can be used to predict the pressure drop inhighly-devlated and horizontal well section.更多还原