As previous analyses of the accident, including BP's own, have shown, the flawed cementing that let oil into the bottom of the supposedly sealed well was not the only issue.
正如之前对于事故的分析(包括BP自己的)所指出的，有问题的水泥灌浆作业致使石油进入到了本应密封的油井的底部，但这并不是全部的原因。
The technologies could ensure the well bottom pressure keeping balanced during waiting on cement and cementing safety.
该技术能保证固井候凝过程中井底压力平衡，施工安全。
A component installed near the bottom of the casing string on which the cement plugs land during the primary cementing operation.
安装在套管柱底部附近的一个部件，在初次注水泥作业期间水泥塞坐放于其上。
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