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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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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Engineers will now lower a containment cap to the seabed and attempt to fit it over what's left of the riser pipe.

现在，工程师们将把一个围堵盖降到海床上，试图覆盖在破裂的立管上。

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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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One ROV got a saw lodged in the side of the leaking riser pipe in early June, for example, causing BP to rethink its strategy for trying to stop the gushing leak.

CNN: John D. Sutter