液动锤射流元件喷嘴临界流速预测与验证  

Prediction and Verification of Critical Flow Velocity for Jet Nozzle of Hammer Hydro

作　　者：李国琳[1] 彭枧明[2] 柳鹤[2] 赵志强[2] 

机构地区：[1]长春大学计算机科学技术学院,长春130022 [2]吉林大学建设工程学院/复杂条件钻进技术开放研究实验室(国土资源部)/地球探测技术与仪器重点实验室(国土资源部),长春130026

出　　处：《吉林大学学报（地球科学版）》2010年第1期159-163,共5页Journal of Jilin University：Earth Science Edition

基　　金：国家'863'计划专题项目(2006AA06A109-3-2-1)

摘　　要：应用CFD动态分析技术,对SC71B型液动锤内部流场进行了仿真分析,结果表明,其射流元件临界流速为20.305～22.565 m/s,大大低于凭经验预测的40 m/s。为检验这一理论预测结果,对SC71B型液动锤射流元件临界流速进行了实验测定,为21.83 m/s,表明理论预测结果与实测结果高度吻合,证明了基于CFD动态分析的液动锤射流元件临界流速理论预测方法的可行性;同时通过理论分析和实测获得了至今为止液动锤射流元件临界流速的最低值,可为研制油气钻井用低速射流元件驱动控制的液动锤提供重要参考。The technique of CFD dynamic analysis was used in the simulation of the critical flow velocity at the nozzle of the fluidic in SC71B liquid-jet hammer prototype, the result shows that the critical flow velocity ranges from 20. 305 m/s to 22. 565 m/s, which is obviously lower than the value of 40 m/s by empirical prediction value. In order to verify the theoretical value by CFD dynamic analysis, a laboratory test was carried out on the machine of SC71B liquid-jet hammer, the laboratory value is 21.83 m/s, which highly coincides with the theoretical value. CFD dynamic analysis is proved as a validated prediction method, meay while the lowest critical flow velocity is obtained, this value can provide very important reference to develop tiquid-jet hammers controlled by fluidic elements with low critical flow velocities for oil and gas drilling.

关 键 词：射流式液动锤 射流元件 临界流速 CFD动态分析 

分 类 号：TE242.7[石油与天然气工程—油气井工程]