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。
Water jet flow is one of the decisive factors for drilling rate during rock bit drilling.
在牙轮钻头的钻进中，水射流是钻进速度快慢的决定因素之一。
Ultra-high pressure water jet assisted mechanical drilling is known as one of the advanced and promising technology to increase drilling rate for deep oil and gas wells.
超高压射流辅助机械破岩钻井是提高深井钻井速度的一项前沿技术，关键技术包括井下增压器、超高压射流辅助破岩机理和钻头、超高压射流钻井参数和工艺等。
The article explores swirling abrasive water jet from angles of nozzle wear mechanism and drilling.
本论文从喷嘴磨损机理和钻孔效果两大部分对旋转磨料射流进行了探索性的研究。
The article explores swirling abrasive water jet from angles of nozzle wear mechanism and drilling.
本论文从喷嘴磨损机理和钻孔效果两大部分对旋转磨料射流进行了探索性的研究。
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