roller cone bit

常见例句

On the system dynamics, the dynamics model for roller cone bit under the interaction of drilling string and rock was established.
從系統動力學的角度出發，建立了基於鑽柱、巖石相互作用下的牙輪鑽頭動力學模型。
syxb-cps.com.cn
The high grade artificial diamond with the lowest magnetism is picked up to strengthen the surface of steel tooth roller cone bit;
磁選熱穩定性良好的優質人造金剛石作鋼齒牙輪鑽頭齒麪強化材料；
Simulated test was made to indicate the charges in volume and in Pressure of ths lubrication system in a roller cone bit at high temperature and under high pressure downhole.
對牙輪鑽頭潤滑密封儲油系統在井底高溫條件下的容積及壓力變化進行了模擬實騐。