percussive rotary drilling

常见例句

The percussive rotary drilling technology being the most efficient way to break up the hard rocks has been highly thought of by oil drilling circles commonly at present.
冲击旋转钻井技术这一被认为是破碎坚硬岩石最有效的方法目前在石油钻井界得到了普遍重视。
The conclusions are as follows: (1) under high pressure, the intensity of granite gradually decreases and the percussive rotary drilling speed increases gradually with the increase of temperature;
得出以下结论：①在高围压状态下，随着温度升高，花岗岩的强度逐渐降低，冲击旋转钻进速度随之逐渐增大；
118.145.16.223
Study on the percussive rotary drilling law under various temperatures is of great significance because it can provide a theoretical basis for new drilling process designed for geothermal production.
研究不同温度条件下冲击回转凿岩规律具有重要意义，可以为设计地热开采的新型钻探方法提供理论依据。
118.145.16.223