The report indicates that a bad cement seal on the oil well allowed gas and other liquids to flow up the production pipe.
这份报告表示，油井上一个有问题的水泥塞使得天然气和其他液体通过生产管道涌向海面。
Other designs have a circular cutout in the middle that corresponds to the diameter of the pipe in the hole to seal the well when pipe is in the hole.
其它类型的设计则在中间有一个圆形的剪切块，使其适合井眼内管柱的直径以便当管柱位于井眼内时能够密封井眼。
These pipe RAMS effectively seal a limited range of pipe diameters.
这些管柱闸板有效地密封了有限范围内的管柱直径。
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