引鞋与浮鞋的不同之处在于引鞋没有节流阀。
It differs from a float shoe in that it lacks a check valve.
检查浮鞋内有无落物。
浮鞋减少了钩载。
浮鞋能够防止环空中的水泥浆向套管内流动这种回流或者U型管效应的发生。
The float shoe prevents reverse flow, or U-tubing, of cement slurry from the annulus into the casing.
当下套管时，浮鞋同样能够引导套管到井眼中心，减少套管对岩石突起或者井眼冲刷段的撞击。
The float shoe also guides the casing toward the center of the hole to minimize hitting rock ledges or washouts as the casing is run into the wellbore.
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。
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.
浮鞋的外壁由钢制成，且一般与套管的尺寸和丝扣匹配，然而浮鞋的钢级不一定要与套管钢级一致。
The outer portions of the float shoe are made of steel and generally match the casing size and threads, although not necessarily the casing grade.
浮鞋的内部（包括锥型段部分）通常由水泥或热塑性材料组成，如果在套管鞋处井眼还需要继续加深的话这种材料必须被钻掉。
The inside (including the taper) is usually made of cement or thermoplastic, since this material must be drilled out if the well is to be deepened beyond the casing point.
浮鞋的内部（包括锥型段部分）通常由水泥或热塑性材料组成，如果在套管鞋处井眼还需要继续加深的话这种材料必须被钻掉。
The inside (including the taper) is usually made of cement or thermoplastic, since this material must be drilled out if the well is to be deepened beyond the casing point.
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