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。
Padded Tongue and Collar for Added throughout the shoe.
增加了整个鞋的舌头和衣领加厚。
Padded Tongue and Collar for Added throughout the shoe.
增加了整个鞋的舌头和衣领加厚。
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