It has been proved by the field experiment that the method of rotary radialjet discharging gas accumulating in upper corner of coalface is really safety, dependable, economical and validly.
试验表明，旋转径向射流可安全、可靠、经济、有效的排放上隅角积聚瓦斯。
2
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。
3
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.