If reservoir fluids flow into another formation and do not flow to the surface, the result is called an underground blowout.
如果油藏流体流入另一层地层，而不是喷至地面，这种结果称之为地下井喷。
When well, the purpose of installing Downhole Blowout Preventer in the event of overflow which from the underground near the source.
安装井下防喷器的目的是在发生井涌或溢流的时候，从井下源头附近就能够阻止井喷。
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