hard-rock drilling

常見例句

The revolving-drilling technique is one of the new-type and effective methods for hard rock drilling.
旋沖鉆井技術(shù)被認(rèn)為是解決深井硬地層鉆井難題的最有效方法之一，具有良好的應(yīng)用前景。
In this paper, the development of drilling extro-hard, compact and weak - abrasive rock structure with diamond bit was summarized since diamond drilling technology' was popularized in China.
本文回顧了我國自推廣金剛石鉆進(jìn)技術(shù)以來，金剛石鉆頭在堅(jiān)硬致密弱研磨性巖層中鉆進(jìn)研究進(jìn)展。
The percussive - rotary drilling technology is one of the most effective ways to solve the drilling difficulties in hard rock in recent years. The technology has a good application prospect.
旋沖鉆井技術(shù)近年來已成為石油鉆井界廣泛關(guān)注的熱點(diǎn)研究課題，被認(rèn)為是解決深井硬地層鉆進(jìn)難題的最有效方法之一，具有良好的應(yīng)用前景。