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反循环钻进
释义
反循环钻进
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everse circulation drilling
反循环钻进
冲洗液介质自孔口经钻杆与孔壁间或双壁钻杆的内外管之间的环状空间流向孔底,经钻杆或双壁钻杆内腔上返到地表的钻探循环方式。
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Taimu Mountain Scenic and Historic Area
Taimu Shan
Tainan Canal
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Taining county Meilin opera troupe
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