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downhole pressurized jet assisted drilling system
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downhole pressurized jet assisted drilling system
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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。
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on axis hologram
on-axis hologram
on axis point
on-axis point
on-axis three-mirror optical system
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ONB
on-band observation
On Beauty of Seven Things
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on-board clock
on-board computer
on-board-diagnostic
on board directly light-emitting diode package
onboard information system
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更新时间：2025/11/4 15:38:39