The kick is physically caused by the pressure in the wellbore being less than that of the formation fluids, thus causing flow.
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The kick is physically caused by the pressure in the wellbore being less than that of the formation fluids, thus causing flow.
从物理上讲，井涌是由于井眼压力低于地层流体压力所致，从而引起流动。
Air is forced up from the buoy counterweight tube during downward motion causing the balls to seal the air ports in the valve, thus forcing the air to flow into the whistle.
空气在向下运动过程中受到浮标向上的推力，使阀球将阀门里的气舱密封住，这样迫使气流进入雾笛。
The principles, plans and measures adopted to control debris flow are different, that is, the controlling models adopted are different, thus causing different controlling effects.
防治泥石流所采用的原则、方案和措施不同，亦即采用的防治模式不同，就会出现不同的防治效果。
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