“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	uncut book uncut lens undamped undamped electrical oscillation undamped natural frequency undamped oscillation undamped oscillator undamped system undec- undeca- undecagon undecahedron undecaprenol undecidability undecidability theorem undecidable undecidable formula undecidable problem undecidable proposition undecidable theory undecillion undecimal undecimal number system undecimal system undecomposable

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