But drilling such Wells takes months.

但钻这二口井将耗时数月。

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Some oil lies under regions where drilling is forbidden, such as national parks or other public lands.

有些石油位于禁止钻探的地区之下，如国家公园或其他公共土地。

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These programs are done by organizations such as the International Association of Drilling Contractors or International Well Control Forum.

这些项目是由国际钻井承包商协会或国际井控论坛等组织完成的。

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Needless to say, drilling in such places is difficult and expensive, and therefore risky.

ECONOMIST: Oil companies: Improving their fieldcraft | The

The speculation is that something went wrong with the circulation of this drilling mud such that it could no longer control the reservoir pressures.

FORBES: Blowout Suspected in Transocean Rig Explosion

Jim Noe, general counsel of shallow-water drilling contractor Hercules Offshore defended shallow-water drilling, saying such projects tap relatively low-pressure reservoirs, making blowouts less likely.

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