Cutting through the riser had been seen as a riskier strategy than the top kill, which is why it wasn't tried before.
在人们看来：同“封顶”相比，切断旧立管是一项更具有风险的策略，这就是为什么之前不愿尝试的原因。
That would mean cutting the existing riser, but now that the siphon inserted into it is bringing oil up to the barges it means risking a serious setback.
这就意味着要剪断已经存在的立管，但现在插在那儿的虹吸管正把油吸入驳船内。这样做就要冒一个严重挫败的险。
The shears can be used for activities like cutting bent or broken riser, shearing pipe or clearing an area to prepare for capping stack activities.
液压剪也可用于切割弯管、切断隔水管、剪切钻杆，并为其他应急封井作业清理空间。
The shears can be used for activities like cutting bent or broken riser, shearing pipe or clearing an area to prepare for capping stack activities.
液压剪也可用于切割弯管、切断隔水管、剪切钻杆，并为其他应急封井作业清理空间。
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