... catwalk狭小的过道,高空走道;高台,天车台 casing float collar套管浮箍 casing float valve套管浮阀 ...
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A float collar is placed at the top of the float joint and a float shoe placed at the bottom to prevent reverse flow of cement back into the casing after placement.
浮箍是放置于浮动接头之上的,而浮鞋则是放置于浮动接头之下,以防止水泥浆回流到套管内。
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