According to the drillpipe structural characteristics, a dolly appropriate for drillpipe and Kelly detection is designed, of which its probe is adjustable.
根据钻杆的结构特点，设计了探头距离可调的适用于圆钻杆和方钻杆的探测小车。
Owing to various causes, some drillpipe sticking occurred during oil drilling. Different disposal methods should be chosen according to different formations on different conditions.
在石油钻井施工中，由于种种原因会造成一些卡钻事故，对于不同情况不同地层条件下的卡钻事故，要选择不同的处理方法。
Owing to various causes, some drillpipe sticking occurred during oil drilling. Different disposal methods should be chosen according to different formations on different conditions.
在石油钻井施工中，由于种种原因会造成一些卡钻事故，对于不同情况不同地层条件下的卡钻事故，要选择不同的处理方法。
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