Remote-controlled machines smash the sulfide deposits, which are then hoovered up through a riser pipe to a vessel on the surface.

远程控制的机器粉碎硫化物沉积物，然后通过升流管将其吸附到地表的容器上。

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Originally the preventer was linked to the Deepwater Horizon by a mile long vertical pipe called a riser, through which oil would flow.

最初，防喷器与深水地平线平台由一根一英里长的垂直管相连，这根管子叫做立管，石油既由此通过。

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Riser pipe: a four-foot-diameter steel pipe called a riser connects the ship to the borehole.

立管：直径四英尺的钢管(称为“立管”)将船和钻孔连接起来。

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Allen said that in preparation for the storm, crews had pulled the drill string out, put a plug known as a "packer" in the casing pipe and filled the riser with seawater so the pipe would be stable.

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As early as five hours before the explosion drillers noticed unexpected loss of fluid in the riser pipe, indicating leaks in a part of the blowout preventer.

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Inside the riser pipe is a space about half a meter in diameter, large enough to hold the spinning drill pipe and bit and to allow the return flow of drilling fluid.

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