When underbalanced drilling or drilling easy leaky zone by using aeration fluid, the determination of fluid density and downhole fluid column pressure is very important.

利用气体型流体进行欠平衡钻井，或钻易漏地层时，流体密度及井下液柱压力的确定十分重要。

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Drilling gat the Likuyu North Prospect intersected substantial higher grade Uranium mineralisation, the known mineralised zone extends to just 2.6km of the 5km defined radiometric anomaly.

利库尤北的钻探作业已经遇到了大量的高品位铀矿化区域，在确定的5公里辐射异常区域内，已知矿化区延伸至2.6公里。

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According to the relation between the temperature and the ratio of the diameter of the defrosting zone to that of the drilling bit, the volume of washing fluid is optimized.

依据不同冲洗液温度时融化区直径与钻头直径比和冲洗液用量的关系，讨论了冲洗液用量的优化。

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It is accelerating the ramp development and exploration drilling at the zone and is incorporating the results into a study on future phased expansion.

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In either zone, the drilling company can also ask the government for a waiver.

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In a lot of wells I saw that the zone was taking drilling mud, soaking it up and leaving a layer of mud cake across a permeable interval of the wellbore.

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