For this reason, the well designer generally seeks to maximize the fluid velocity (or other measure of jet energy) to achieve maximum cleaning at the bottom of the hole.
正因为这一原因，井眼设计人员一般寻求使流体速度(或其它射流能量)最大化的方法去达到最大程度地清洁井底的目的。
In order to explore the effect of ambient pressure on jet flow field in deep well and ultra-deep well, a physical model for flow field of confined water jet at bottom hole was established.
考虑到深井、超深井中井底围压对射流流场有一定的影响，建立了井底受限射流流场的物理模型。
It hums like a bee on the tea-table, and the steam rises in a little jet from a tiny hole in the top. The boiling water comes out of a tap at the bottom.
放在茶几上，它会像蜜蜂一样嗡嗡作响，蒸汽从顶上的一个小孔钻出来往上升，热水可以从下边的一个水龙头放出来。
In this paper the relation between the hole diameter and the pile thickness of the jet on the hole bottom for a jet penetrating or drilling process is theoretically examined.
本文在理论上探讨了射流在侵彻或钻孔过程中，孔径和射流在孔底的堆积厚度之间的关系。
When the inclination angle of a side nozzle is 0, 30,45 and 60 degrees, the eddying flow of the bottom hole vortex device will cause rotation at the bottom hole, affecting on the jet from bit nozzles.
侧喷嘴倾斜角度在0度、30度、45度和60度情况下，由于井底涡旋器的旋流作用，导致井底产生旋转，对钻头喷嘴射流产生了影响，以致在45度时出现压力损失最小的情况；
When the inclination angle of a side nozzle is 0, 30,45 and 60 degrees, the eddying flow of the bottom hole vortex device will cause rotation at the bottom hole, affecting on the jet from bit nozzles.
侧喷嘴倾斜角度在0度、30度、45度和60度情况下，由于井底涡旋器的旋流作用，导致井底产生旋转，对钻头喷嘴射流产生了影响，以致在45度时出现压力损失最小的情况；
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