不稳定试井应做到瞬时关井,关闭阀门时间不要超过()。 A.1min B.2min C

题型:单项选择题

问题:

不稳定试井应做到瞬时关井,关闭阀门时间不要超过()。

A.1min

B.2min

C.3min

D.5min

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