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在複雜的地質條件和水文地質條件下進行打鑽時,常常發現冲洗液漏失的現象。把各種不同成份和性質的速固混合物從鑽管或孔口灌入鑽孔內是封閉吸收帶,防止冲洗液漏失的基本方法之一。作者考慮到,膠結液所以能很快的硬化和凝固,是由於在膠結液內加入了特製的附加劑之故。因此建議把呈液體狀或呈懸浮體的膠結液直接注入井內吸收帶(漏水岩层)的上面。事實上這種方法叫做“雙管法”。這個方法的實質就是用一個鑽桿套管往鑽孔內灌入膠結液,同時用另一個鑽管灌入附加劑的液體 (編者註:據我們了解“双管法”的實質可能是:往孔內下入兩重管,先下一套管,再於套管內下入一套鑽桿,從
Flushing often occurs when lancing drills under complex geological and hydrogeological conditions. One of the basic ways to seal off the absorption band and prevent the loss of flushing fluid is to pour the quick-setting mixture of various compositions and properties into the borehole from the drill pipe or orifice. The authors consider that the cements can be quickly hardened and solidified due to the addition of a special additive to the cements. It is therefore advisable to inject the cementitious liquid, which is liquid or in suspension, directly onto the absorption zone (water-leaking rock formation) in the well. In fact, this method is called “double-tube method.” The essence of this method is to use a drill stem casing to pour cement into the borehole while filling the borehole with additional pipette fluid (Editor’s Note: As far as we know, the “double pipe method” may be: Hole into the double tube, the first set of tubes, and then into the casing into a set of drill pipe, from