论文部分内容阅读
高效率的井下硬煤生产受到越来越多的重视,其中的一个话题就是瓦斯的有效抽采。本文比较了水平井和斜井的抽采潜力,描述了设计水平定向钻井的主要准则。
Efficient underground hard coal production by more and more attention, one of the topics is the effective gas extraction. This article compares the potential of horizontal and inclined wells and describes the main criteria for designing horizontal directional drilling.