Underbalanced drilling technology can increase ROP and decrease formation damage, so it is increasingly used worldwide.
欠平衡钻井技术可以降低地层损害、提高机械钻速，所以在世界范围内被逐渐采用。
These techniques successfully cope with the wellbore instability under complex formations, protect hydrocarbon zones, increase ROP, lay solid foundations for rapid and economic drilling operations.
该技术的实施，成功地解决了复杂地层的井壁失稳问题，有效地保护了油气层，提高了钻井速度，为该地区安全、快速及经济钻井奠定了坚实的基础。
Air drilling is one of the effective means to increase drilling ROP, able to reach an ROP several times that of a conventional drilling.
采用空气钻井技术提高钻井机械钻速非常有效，钻速是常规钻井机械的数倍。
Tests have proved that the above-mentioned structural designs are reliable and contribute a lot to increase in ROP and service life.
通过大量试验证明，这些结构的设计可靠合理，对于提高钻进速度，增加其使用寿命具有重要作用。
Tests have proved that the above-mentioned structural designs are reliable and contribute a lot to increase in ROP and service life.
通过大量试验证明，这些结构的设计可靠合理，对于提高钻进速度，增加其使用寿命具有重要作用。
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