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一、在我区农村牧区钻井中有些地区为基岩区,以前使用牙轮钻头研磨钻进法,工期长、造价高,牙轮钻头又难买,因此在基岩地区打井是一大困难,呼盟锡盟部份地区更为突出,用此法施工,基本上解决了基岩地区钻井困难,有实用价值,经济效果显著,降低了造价,缩短了工期,提高了成井质量。二、此法使用各井队现有的SPJ—300水文水井钻机即可施工只要再购入一套大口径钻具及钢粒就可以配套施工。施工方法,与一般打井工艺相同只是把牙轮钻头换成大口径岩心管代钻头,泥浆较稀,量小,采用中慢速钻进即可。三、文中所提存在问题:遇到完整岩石,折不断岩心,取心比较困难,需进一步研究解决。
First, some areas in the rural pastoral areas of our region are bedrock areas. In the past, the use of roller cone bit grinding and drilling method had a long construction period, high cost and difficult to buy roller cone drill bits. Therefore, drilling wells in bedrock area is a major difficulty , Hutong Ximeng more prominent parts of the region, with this method of construction, basically solved the bedrock drilling difficulties, have practical value, significant economic effect, reducing the cost, shorten the construction period and improve the quality of the well. Second, this method uses the existing well SPJ-300 Hydrology and Water Well drilling rig construction can be purchased as long as the purchase of a large diameter drill and steel particles can be supporting construction. Construction methods, and the general drilling technology is the same as the only replace the roller cone drill core drill instead of large-diameter, more dilute slurry, the amount of small, slow drilling can be used. Third, the text of the existing problems: encounter complete rock, broken core, coring more difficult to be further studied and resolved.