石油钻采工艺2017，Vol.39Issue(2)：169-175,7.DOI:10.13639/j.odpt.2017.02.008
井下喷射孔结构压降计算中流量系数的探讨
Discussion on flow rate coefficient used for the calculation of downhole jet orifice pressure drop
摘要
Abstract
Jet orifices (e.g. nozzle and perforation) are abundantly applied in petroleum drilling and production engineering. In the case of complex engineering fluid, the flow rate coefficient calculated from jet pressure drop is selected in the large range, so technologi-cal design and construction safety are impacted seriously. In this paper, the main factors influencing the calculation of jet orifice pres-sure drop were analyzed based on the calculation formula of jet orifice pressure drop which is commonly used for drilling, production, fracturing and casing perforation. Then, the formula for calculating the flow rate coefficient of jet orifice at cylinder outlet of taper or arc belt was established by means of numerical simulation. Finally, the identical calculation formula of flow rate coefficient was provided by taking into consideration the effects of physical properties on flow rate coefficient of fluids. And its reliability was verified by virtue of experiments and numerical simulation. It provides the theoretical basis for calculating the pressure drop of jet orifices (e.g. nozzle and perforation) in oil drilling and production engineering.关键词
喷嘴/压降/流量系数/数值仿真Key words
nozzle/pressure drop/flow rate coefficient/numerical simulation分类
能源科技引用本文复制引用
姚利明,刘巨保,韩雪,刘玉喜,花明泽,董日治..井下喷射孔结构压降计算中流量系数的探讨[J].石油钻采工艺,2017,39(2):169-175,7.基金项目
研究生科技创新项目"页岩油气藏压裂管柱输送流体机理研究"(编号:YJSCX2015-023NEPU). （编号:YJSCX2015-023NEPU）
