Ten years ago virtually all of America's natural-gas production came from traditional gas or oil Wells reached by vertical drills.
实际上在十年前，美国所有的天然气开采公司，不是采用传统方式，就是利用垂直钻井开采。
During the process of gas production in gas Wells, vapor will condensate into liquid water due to the cut down of pressure and temperature of natural gas.
在气井生产过程中，由于天然气压力和温度的降低，水蒸气会凝析成液态水。
But many problems with negative effects for production appear in the field water draining jobs with foam, which cause the production of gas Wells decreasing, even off production.
但在现场泡排作业的同时也出现了许多不利于正常生产的问题，从而导致气井产量下降甚至停产。
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