The utility model relates to a square complement core for a well drilling process, which belongs to an appliance of a well drilling device.

本实用新型是一种在钻井过程中使用的方补芯，属钻井设备的器具。

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As one functional part of the rig, drilling pump carries the rock debris from the bottom of the well and supplies power to the drilling tool in the well drilling process.

钻井泵是钻机的三大功能部件之一，其在钻井过程中起着携带井底的岩屑和供给井底动力钻具动力的作用。

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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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When seismic surveys show that there is a good chance of finding oil, companies set about the delicate process of drilling an exploratory well.

ECONOMIST: Inside story

Attempts to use new methods to contain just one of three leakage sites have met with little success, and the process of drilling a relief well will take two or three months.

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Tim Probert, president of global business lines, says that horizontal drilling, a process in which a well is drilled down vertically and then angled around a curve to reach reservoirs from a horizontal angle that increases the well's exposure, is now 55% of Halliburton's total activity.

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