摘要
随着油气资源开采难度的逐渐加大,大位移井、大斜度井和水平井等钻井技术发展迅速,钻井过程中托压问题一直是复杂井技术中急需解决的重大问题。通过设计一种立阀结构水力振荡器,实现将管柱与井壁之间的静摩擦转变为动摩擦,减小摩擦阻力,有效解决托压问题。水力振荡器主要通过动定阀周期性开合产生间隙水击压力,压力阀口压力大小直接影响减阻效果,为此建立了立阀结构水力振荡器动定阀有限元模型,利用fluent软件,在滑移网格技术基础上分析立阀结构水力振荡器压降变化规律,并根据现场实际情况分析了流量以及流道口长度对立阀结构水力振荡器性能的影响,为立阀结构水力振荡器的设计与优化提供理论依据。
With the increasing difficulty of exploitation of oil and gas resources,large displacement wells,high angle wells and horizontal wells for oil drilling was rapidly developed.However,the pressure in the process of drilling restricted the development of this technology,which was the serious problem needed to be solved urgently.In this paper,a hydraulic valve with vertical valve structure was designed,which could change the static friction between the pipe string and the borehole wall into dynamic friction,reduce the friction resistance,and effectively solve the problem of pressure.The hydraulic oscillator could directly influence the drag reduction effect mainly through water hammer pressure produced by the periodic opening and closing gap of fixed valve and the pressure of the valve port.Therefore,the finite element model of the hydraulic oscillator with vertical valve structure is established.Based on the sliding grid technique,the variation law of pressure drop of the hydraulic valve is analyzed by using fluent software.According to the actual situation of the oilfield,the influence of the flow rate and the length of the nozzle on the performance of the hydraulic valve is analyzed.It provides a basis for the design and optimization of hydraulic oscillator with vertical valve structure
出处
《长江大学学报（自然科学版）》
CAS
2018年第11期64-66,共3页
Journal of Yangtze University(Natural Science Edition)
基金
国家自然科学基金项目(51405032)
关键词
钻井提速
托压
轴向振动
水力振荡器
立阀结构
drilling
speed increase
frication
axial vibration
hydraulic oscillator
vertical valve structure
