top riser 顶冒口
open top riser 明冒口
Top Tension Riser 立管 ; 顶部张紧立管
Top Tensioned Riser 立管 ; 顶张式立管
Top tentioned riser 顶端张紧立管
top tensioned drilling riser 顶部张紧钻井隔水管
When the rig sank, the riser broke near the top while remaining attached to the blowout preventer at the bottom.
当钻井平台下沉时，立管在顶部附近的地方断裂，同时另一端仍与底部的防喷器相连。
When the rig sank, the riser broke near the top while remaining attached to the blowout preventer at the bottom, bending itself like a pretzel in its subsequent collapse.
当钻井下沉时，海底立管在顶部附近破裂，另一端还连在防喷阀上。 在随后的倒塌中，它像脆饼一样弯曲。
The top kill experience seems to have suggested to the company that the riser is not in fact holding back the oil very much; and besides, the other options have not worked out.
封顶的经历似乎已向英国石油公司表明：实际上，这根立管根本没有控制住漏油；并且除此以外，其他的补救选择也于事无补。
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