Surface borehole well is a simply and high performance method to drawing coal bed and goaf gas which controlling and making good use of the coal mine gas.

地面钻井抽采采动影响煤层及采空区瓦斯是进行煤矿瓦斯治理和抽采利用的有效方法。

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Well TK431 was a test well drilled in this area trying to solve the problem of borehole instability.

TK 431井是在该地区实施的一口解决该井段井眼失稳问题的试验井。

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Lowering radioactive material into a borehole and measuring how well the radiation passes through the surrounding rock provides more information about what's down there.

将放射性物质放入钻孔中然后测量放射线穿过周围岩石的特性，可以提供地下物质的更详细信息。

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The tests will continue for at least 48 hours, during which time engineers will carefully watch the pressure building up in the well to make sure the damaged borehole can hold it in without a new leak popping open somewhere else.

FORBES: BP Cap Test Looking Good. Expect Relief Rally.