... 钻井井位布置;井数与油田亩数之比：drilling pattern 钻井井底深度：bottom driller 钻井经营者;钻井操作者：drilling operator ...
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bottom m driller 钻井井底深度
To accurately control the amount of force applied to the bit, the driller carefully monitors the surface weight measured while the bit is just off the bottom of the wellbore.
为准确地控制施加于钻头上的力的大小，当钻头刚刚离开井底时司钻要仔细监测地表测得的重量。
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 is to trip off bottom and out of the hole at a speed that will not cause swabbing.
司钻要用一个对井底不会产生抽吸的速度进行起钻。
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