When the well reaches a pool, oil usually rises up the well because of its density difference with water beneath it or because of the pressure of expanding gas trapped above it.

当井和一个水池相接时，油通常会从井里上升，因为它与井下的水的密度不同，或者因为停留在它上方的膨胀气体的压力。

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Rockhopper Exploration Plc, which has a 7.5 percent stake in the Rachel well, said testing showed some reservoirs were mostly water bearing with residual oil.

Rockhopper Exploration公司拥有Rachel North油井7.5%的股权，该公司表示，勘探测试表明，蕴藏石油的蓄水层中大部分是水分。

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Dispersants used by oil companies do not work well at or near freezing temperatures. Booms to contain a spill cannot be used with icebergs floating in the water.

石油公司使用的分散剂在接近冰点的温度下效果不佳，用于防止溢油扩散的栏油栅面对漂浮的冰山也无能为力。

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A new underwater video - released as the latest hearings began - shows oil continuing to spill from the deep water well.

VOA: standard.2010.05.18

Safe to say that the Department of Defense does not have a submersible with arms to shut off the valve of a deep-water oil well.

WHITEHOUSE: Aboard Air Force One En Route Andrews Air Force Base

For nine months the ship Transocean Discoverer Spirit used 360-degree rotating propellers to hold itself steady in the 3, 500-foot-deep water as diamond-tipped bits cut the deepest oil well ever--6.5 miles down.

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