rock drill bit

常見(jiàn)例句

Abrasive particle in the circulation medium from hard rock and drill bit cut the element.
循環(huán)介質(zhì)中的磨料粒子（來(lái)自硬巖、鑽頭），對(duì)元件進(jìn)行切割；
Our research demonstrate that the drill string vibration is forced vibration, it needs to consider the rock-drill bit-drill string-swivel as the "drill string vibration system";
研究認(rèn)爲(wèi)鑽柱振動(dòng)是一受迫振動(dòng)問(wèn)題，需要將井底巖石-鑽頭-鑽柱-水龍頭作爲(wèi)一個(gè)“鑽柱振動(dòng)系統(tǒng)”來(lái)對(duì)待；
www.cea.gov.cn
In order to solve the problem of low efficiency drilling in hard and compact rock with diamond drill bit, efforts were made to manufacture electroplated weakly-bonded diamond bit.
爲(wèi)了解決電鍍金剛石鑽頭鑽進(jìn)堅(jiān)硬致密巖石時(shí)傚低的問(wèn)題，進(jìn)行了電鍍?nèi)醢偨饎偸嶎^的研究。

But for shale gas, once the drill reaches the shale rock underground, the drill bit is turned horizontally to bore a well that stretches through the natural gas producing shale.
FORBES: China Closer To Joining Shale Gas Fracking Craze