本文着重低压井进行井底压力研究，参考前人欠平衡钻井流体力学参数设计理论、方法，对不同的流体介质进行了分析和研究。

Refering to the theories and methods on drilling fluid mechanic parameter design, This paper focuses on study on the pressure of bottom-hole; and then analyzes and studies different fluids media.

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为了有效解决低压漏失井的井下清砂问题，研究开发了一种具有钻进功能的捞砂泵。

To solve effectively the problem of sand removing in low-pressure absorption Wells, a drilling sand pump was developed.

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归纳给出了低压易漏井平衡压力注水泥设计的步骤。

The design approach of balanced-pressure cementing is given for the wells with weak formations.

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