Main tieback stem is protected by injecting ethylene glycol into wellhead .
回接主管道通过在井口注入乙二醇进行保护。
Some people waited all day at the wellhead in order to get news of relatives of survivors .
一些人在井口等待了一整天,以期能得到亲属生还的消息。
It was not until recently that these drilling engineers began to touch on the problem of wellhead control .
直到最近,这些钻井工程师才开始着手研究井控问题。
Poor miserable donkey in the well to call for several hours , the farmers lost in a fog at the wellhead anxious , that is no way to save it up .
那可怜的驴子在井里凄惨地叫了好几个钟头,农民在井口急得团团转,就是没办法把它救起来。
Population of suspected gas leak 4 pm yesterday , more than covers the scene has been re-covered , but some diesel oil flowing wellhead department , placed the wounded in the footwear is still at the scene .