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。
Remarkable progress had been made in the technique of drilling Wells long before the earliest oil-wells.
远在最早的油井之前，钻井技术就已经取得了显著的进步。
To use different core drilling method in different geological environments can ensure the smooth progress of geological exploration work.
在不同的地质环境中，使用不同的岩心钻进方式，可以保证地质勘探工作的顺利进行。
Considering the large work quantity and tight time schedule for the curtain grouting in Bid I of Letan project, drilling speed is the most critical factor in the construction progress.
乐滩水电站I标工程帷幕灌浆工程量大，工期紧，影响施工速度的最大因素是钻孔速度。
The theoretical study for drilling string has been in progress for many years, but the real working state of drilling string still remains to be solved.
对钻柱在井下的受力状况已进行过许多理论研究，但对钻柱在井下的实际工作状态的研究还不多。
For a long time, computer simulation drilling process has been used by domestic and foreign scholars, especially in recent years a great progress has been made.
长期以来用计算机数值模拟钻井过程一直受到国内外学者的重视，特别是最近几年来已经取得了很大的进展。
The percussion-rotary drilling technique is one of the most effective drilling methods. It has made a great progress in recent years.
冲击旋转钻进技术是一种高效的碎岩方法，近年来随着施工领域的拓宽取得了很大的进步。
In the operation progress of offshore exploratory well, the strength and stability of drilling riser can play an important role in offshore drilling and completion.
在海洋探井钻井过程中，隔水导管的强度及稳定性对于安全钻完井作业具有重要意义。
In the operation progress of offshore exploratory well, the strength and stability of drilling riser can play an important role in offshore drilling and completion.
在海洋探井钻井过程中，隔水导管的强度及稳定性对于安全钻完井作业具有重要意义。
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