A section of heavywalled tubing that is placed across any perforated interval through which the production tubing must pass, such as may be required in multiple zone completions.
置于任一射孔层段的一段厚壁油管，这时生产油管必须通过此射孔层段，如在多层完井中所要求的。
2
On to the field remained only the walled tabor camp of the Cossacks, which was protected from being immediately overrun that day and the next when storms brought unusually heavy rain.
从流窜那天开始，战场上，只剩下壁垒化的哥萨克辎重车车垒营地提供保护，接着，暴风带来不寻常的大雨。
3
A relatively short, heavy-walled completion component installed in areas where turbulence is anticipated.