“downhole pressurized jet assisted drilling system”的概念、定义、翻译、参考文献-科学参考

单词	downhole pressurized jet assisted drilling system
释义	downhole pressurized jet assisted drilling system Encyclopedia 工学钻井新技术与装备释 downhole pressurized jet assisted drilling system井下增压射流辅助破岩钻井装置通过安装在钻头上方的井下增压装置，将钻柱中循环的部分钻井液增压后形成增压射流，经钻头的超高压喷嘴喷出，冲击井底后直接或辅助钻头破碎岩石，将水力破岩与机械破岩紧密结合起来，达到提高钻速目的的钻井装置。
随便看	the preservation of Esfahan historic city the preservation of Florence historic city the preservation of Hanoi historic city the preservation of Istanbul historic city the preservation of Kathmandu historic city the preservation of Kyoto historic city the preservation of Leuven historic city the preservation of Lima historic city the preservation of Lyon historic city the preservation of Malacca historic city the preservation of Memphis and its Necropolis the preservation of Milan historic city the preservation of Moscow historic city the preservation of Nara historic city the preservation of Newcastle historic city the preservation of of Paris historic city the preservation of of Shirakawa-go and Gokayama historic villages the preservation of Oslo historic city the preservation of Palermo historic city the preservation of Philadelphia historic city the preservation of Rabat city the preservation of Samarkand historic city the preservation of Segovia historic city the preservation of Seoul historic city the preservation of Siem Reap city

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