Referring to the condition that occurs when the kelly is all the way down, so drilling progress cannot continue.
方入是指发生了这样的情况，即方钻杆全部进入到补心内，导致钻井进程不能够继续下去。
Referring to the condition that occurs when the kelly is all the way down, so drilling progress cannot continue.
方入是指发生了这样的情况，即方钻杆全部进入到补心内，导致钻井进程不能够继续下去。
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