This paper provided basis for application of rotary abrasive jet in drilling radial horizontal Wells.
该试验研究为磨料旋转射流应用于径向水平钻井提供了基础。
As one of radial horizontal drilling techniques, high pressure water jet drilling technology is capable of using mechanical or water jet apparatus to make a cavity at the selected coal seam.
高压水射流径向水平孔钻进技术是水平孔施工技术之一，它是在垂直瓦斯抽放或煤层气勘探钻孔布置机械或水力扩孔装置，对准选定的煤层部位进行扩孔。
The equations of the density function of residence time distribution, the axial growth of the velocity half - radius, the axial decay of radial maximum jet ve...
给出了停留时间分布密度函数、无因次半速度半径轴向增长、径向射流最大速度轴向衰减和径向速度分布计算公式。
The effects of different jet mode and air amount on propeller's hydrodynamics and radial noise are also studied by model tests.
并以模型试验的方法研究了不同充气方式和充气量对螺旋桨水动力和辐射噪声的影响。
Simulation results shown that the jet velocities of gas and particle phases, and concentration decreased along both the radial and axial directions.
模拟计算表明气固两相射流速度沿轴向和径向减小，颗粒浓度下降。
The development of radial horizontal well drilling technology was under the studies on swirling jet theory and rock failure mechanism.
旋转射流理论和破岩机理研究，研制了径向水平钻井技术。
This paper discusses the effects of air jet in the leading edge of propeller on its hydrodynamics and radial noise.
讨论了螺旋桨导边充气对其水动力性能和辐射噪声的影响。
This paper discusses the effects of air jet in the leading edge of propeller on its hydrodynamics and radial noise.
讨论了螺旋桨导边充气对其水动力性能和辐射噪声的影响。
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