The chemical wash is pumped ahead of the cement slurry to help ensure effective mud removal and efficient cement placement.

化学冲洗剂在水泥浆之前泵入，以利于确保有效地去除泥浆和有效地放置水泥浆。

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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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But, concrete placement temperature, surrounding temperature and the heat of hydration of cement, they take a more affection on lining thermal stress.

混凝土的浇筑温度、环境温度以及水泥水化热对温度应力的影响十分显著。

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The location of hydrocarbon zones is critical information required prior to performing cementing services and achieving desired cement placement, Halliburton said.

FORBES: Halliburton Sues BP for Defamation, Misrepresentation