Rock drillability of rock samples was studied by means of experiment under zero pore pressure and simulated down hole conditions.
本文用试验方法研究了石油钻井过程中井底岩石零孔隙压力条件下的岩石可钻性。
Hole Angle should not exceed 15 degrees any where in the hole unless down hole geological conditions induce such deviation, such as acute fault intersections.
井斜角在井眼任何地方不应超过15度，除非井下地质条件引发了此种偏离，如严重的断层交叉。
With the development of oilfield and a great use of well-bore tools, such fishing technology will have a wide prospect applied to the more and more complex conditions of down-hole operations.
随着油田的深入开发，井筒工具的大量使用，井下作业越来越复杂，该项打捞技术具有广阔的应用前景。
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