双出口旋流取样器在RC钻探试验中的应用

Application of Double-outlet Cyclone Sampler in RC Drilling Test

摘要:

反循环取样（RC）钻探是钻探技术的又一次技术革命，以其高效率、低成本、高适应性在西方国家得到了广泛应用。近年来，RC钻探在我国也越来越得到重视，应用越来越多。采样工艺是RC钻探的重要组成部分，国外在这方面比较先进，而我国采样工艺相对简单落后。双出口旋流取样器是对单出口旋流取样器的改进，在单出口的基础上增加了一个出口及阀门，阀门为两个出口共用，开启一个的同时关闭另一个。通过阀门的开关实现两个出口轮流接样，避免了连续进尺情况下的样品遗漏，减少了取样过程中粉尘外溢造成的污染。通过在卡拉塔格整装勘查区RC钻探试验中的应用，证明了它在防止样品遗漏、减少环境污染及便利取样操作方面有很大优越性。

Abstract:

Reverse circulation (RC) sample drilling is another technical revolution in drilling technology, which has been widely applied in western counties for its efficiency, low cost and high adaptability. In recent years, RC drilling has also been paid more and more attention in China with more and more application. Sampling technology is an important part of RC drilling, comparing with some foreign countries, the sampling technology is still backward in China. The double-outlet cyclone sampler is an improved device on the basis of a single outlet cyclone sampler; the valve is shared by 2 outlets, one opening while another closing. Samples taking are in turn at 2 outlets by the valve switching to avoid samples missing in continuous drilling and reduce the dust pollution in the sampling process. Through the application in RC drilling test in Kalatage equipped exploration mining area, it is proved that this double-outlet cyclone sampler has great superiority in preventing samples omission, reducing environmental pollution and facilitating sampling operation.