Sea water is used as displacement fluid, which can provide the floating force of casing string.
采用海水顶替液，实现套管的浮力漂浮。
Floating displacement cementing technology and flush joint casing technology are the first application in sidetracking well of Dagang Oilfield.
漂浮顶替固井工艺、无接箍套管工艺技术是首次应用在大港油田侧钻井上。
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