True and stable formation pressure and mud pressure can be provided by RFT test data.

RFT测试资料能提供真实可靠的地层压力和泥浆压力。

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They were covered with huge deposits of mud; and by processes of chemistry, pressure and temperature were changed through long ages into what we know as oil.

它们被厚厚的泥沙沉积物所覆盖，并由于化学变化、压力和温度的作用过程，在漫长的时间中变成了我们所知道的石油。

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As part of that process they had to replace the dense drilling mud, which was used to keep the well under pressure while it was drilled, with sea-water.

在封井过程中，他们必须把用于在钻探过程里，保持钻井与海水压力相当的高密钻井泥更换掉：因为上方的海水的压力低于底下油气的压力。

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During the pumping and displacement of the heavyweight spacer used to displace the mud, a breach in pressure integrity resulted in the undetected loss of drilling mud into the probably uncemented well-bore.

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When the heavy drilling mud that provides the pressure needed to keep things from coming up the well was removed, first as a test, then as part of a procedure for closing down the well and moving the rig, telltale signs that something was wrong were missed.

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As the drill progresses through the rock and sand below the seabed, the pressure of the mud in the drill string must be kept within a limited range.

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