【摘 要】
：
(一)关于水平钻进方法优缺点比较表 FS—60C前卡盘卡外管,后卡盘卡内管.冲洗液由分水器经内外管之间送入孔底,由内管返出,内外管钻头间隔约3厘米。内管比外管切削少,要注意
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(一)关于水平钻进方法优缺点比较表 FS—60C前卡盘卡外管,后卡盘卡内管.冲洗液由分水器经内外管之间送入孔底,由内管返出,内外管钻头间隔约3厘米。内管比外管切削少,要注意调整内外管的工作效率。在地层变化钻进困难时,可以直接从内管中加内管,将原外管当套管,原内管作外
(A) Comparison of Advantages and Disadvantages of Horizontal Drilling Method Table FS-60C Front chuck chuck outer tube, Rear chuck chuck inner tube Flushing fluid is sent to the bottom of the hole between the inner and outer tubes by the manifold, , The inner and outer tube drill interval of about 3 cm. Inner tube cutting less than the outer tube, pay attention to adjust the work efficiency of the inner and outer tube. In stratigraphic change drilling difficulties, you can directly from the inner tube plus the inner tube, the original outer tube as a casing, the original inner tube for the outside
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