在它上面，近海井架q 4000同其他3艘船只装了50000桶非常重的钻井泥浆，可以提供30000马的马力将泥浆压进油井。

Above it the Q4000 rig and three attendant vessels have 50, 000 barrels of peculiarly heavy drilling mud and pumps capable of providing 30, 000 horsepower with which to muscle that mud into the well.

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测量泥浆池中泥浆体积的变化对于安全钻井，控制井涌、井漏具有十分重要的意义。

It is very important to measure the volume change of mud in mud pit for the safe drilling, the control of well blowout and the lost of circulation.

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因此，优选有效的防气窜添加剂，研制性能良好的防窜水泥浆就显得十分重要。

Hence, it is very important for optional selection the additive preventing the gas flow effectively, and developing good cement slurry for preventing the gas flow.

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