之后司钻上提整个钻柱，移去卡瓦，在开泵并旋转的同时小心地下放钻柱，当钻头接触到井底之后，重新开始钻进。
The driller then picks up the entire drillstring to remove the slips, carefully lowers the drillstring while starting the pumps and rotary, and resumes drilling when the bit touches bottom.
之后司钻上提整个钻柱，移去卡瓦，在开泵并旋转的同时小心地下放钻柱，当钻头接触到井底之后，重新开始钻进。
The driller then picks up the entire drillstring to remove the slips, carefully lowers the drillstring while starting the pumps and rotary, and resumes drilling when the bit touches bottom.
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