国内外的钻井实践表明，要达到这个目的，首选精细控压钻井技术。

In order to obtain this aim, the most appropriate technique is delicate managed pressure drilling based on the study from home and abroad.

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钻井实践表明，地层因素和钻头类型是影响钻井过程的两个十分重要的因素。

Drilling practice show that formation and bit types are tow important factors effected drilling.

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江苏油田真148井的钻井实践证明，利用该方法不但能提高定向准确性而且可降低侧钻成本。

Applications at Zhen 148 Well in Jiangsu Oilfield illustrated that the method not only improves orienting accuracy but also cuts down sidetracking cost.

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