松软突出煤层瓦斯抽采钻孔施工技术及发展趋势

Construction technology and development tendency of gas drainage borehole in soft and outburst seam

通过分析松软突出煤层瓦斯抽采钻孔施工技术研究与应用现状,基于不同钻进方式、护孔方式和改造方法,介绍了松软突出煤层钻孔施工技术的发展历程,并分析了各项技术的含义、优缺点、适用范围和推广应用情况,指出了现有钻孔施工技术存在顺煤层定向钻进困难、筛管护孔直径小、钻孔增产改造范围小等问题。同时提出松软突出煤层瓦斯抽采钻孔施工技术未来发展趋势,包括泥浆脉冲随钻测量定向钻进技术、电磁波随钻测量空气定向钻进技术、大直径筛管跟管钻进技术和大直径小曲率侧钻改造技术等方向。

With an analysis on a study and application status of a gas drainage borehole construction technology in a soft and outburst seam,based on the different drilling method,borehole protection method and reconstruction method,the paper introduced the development course of the borehole construction technology in the soft and outburst seam,analyzed the meaning,advantage and disadvantage,application scope and promoted application status of each technology and pointed out a directional drilling difficulty in seam,a small diameter of the screen pipe protected borehole,a small reconstruction scope of the borehole production increased and other problems existed in the available borehole construction technology. Meanwhile,the paper provided the future development tendency of the gas drainage borehole construction technology in the soft and outburst seam,including the drilling mud pulse with the drilling measuring and directional drilling technology,the electromagnetic waves with the drilling measuring air directional drilling technology,the large diameter screen pipe with the borehole drilling technology and the large diameter and the reconstruction technology of the small curvature sidetrack drilling as well as other orientations.