... primary cement evaluation 固井质量评价 primary cement job 初次注水泥作业 primary cementing 初次注水泥 ...
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Secondary cementing is any cement job that occurs after primary cementing and is called remedial cementing.
二次注水泥在初次注水泥以后进行，并称为补注水泥。
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The denser mud had been, up until this time, the primary pressure control and was keeping the hydrocarbons in place despite the lack of an adequate cement job at the casing shoe.
WSJ: The Oil Disaster Is About Human, Not System, Failure
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