The riser's inner hollow core (a pipe within a pipe) is reserved for the drill string.
立管内部核心是空心的(管中管)，留给钻柱使用。
The crew attaches new lengths of pipe one by one from the top until the "drill string" is long enough to hit the seafloor.
船员们从这根钢管的顶部，一根一根地装上更多管道，直到这根“钻柱”足够长，能碰到海底。
The crew attaches new lengths of pipe one by one from the top until the “drill string” is long enough to hit the seafloor.
船员们从这根钢管的顶部，一根一根地装上更多管道，直到这根“钻柱”足够长，能碰到海底。
The accurate estimate of the drill string vibration and the corresponding technique are very important to protect the FEWD equipment and increase the comprehensive efficiency.
准确判断井下钻具振动并采取相应的技术措施对于有效保护FEWD测量仪器、提高钻井综合效益具有重要意义。
The drill string is rotated by rotary table.
钻柱是由转盘驱动的。
The drill string may be thousands of feet long.
钻具的长度可达数千英尺。
Lower drill string to top of pin and engage threads.
下放钻柱至丝扣部分，拧上丝扣。
The driller sets the drill string in the slips or elevator.
司钻把钻具坐在卡瓦或吊卡上。
It is an inside BOP (blowout preventer)in the drill string.
投入式止回阀是钻柱内防喷器。
Pick up drill string to setting depth, record hook load of the drill string;
上提钻柱至坐封深度，并记录钻柱悬重；
It is a very obvious phenomenon of the drill string vibrating in the drilling.
钻柱振动现象在钻井施工中是非常突出和明显的现象。
Saltwater mud is known to have a very strong corroding effect on drill string.
人们知道，盐水泥浆对钻具有很强的腐蚀作用。
You must keep trying to find a new way to protect the drill string from sticking.
你们应当坚持设法找出防止钻具被卡的新方法。
Analytical technology for drill string stress wave spectral is a brand-new field.
柱应力波频谱分析技术是一个崭新的技术领域。
The rotary carriage provides rotary and vertical motion to the drill string and bit.
转动滑架为钻柱和钻头提供转动和垂直移动。
It is significant for adjusting drill pipe sequence to improve average life of drill string.
该研究结果对于现场提高钻柱的平均使用寿命具有重要的工程理论指导意义。
Therefore, a drill string heave compensation system is needed to compensate the heave motion.
因此，需要采用升沉补偿系统对钻柱升沉运动进行补偿。
The analysis can provide reliable theory basis in order to avoiding resonance of drill string.
该分析为水平井钻井工程避免钻柱共振提供了可靠的理论依据。
Although the structure of drill string seems simple, it bears rather complicated outside force.
虽然钻杆柱在结构上看似较为简单，但实际上，它承受着相当复杂的外力。
A new lithology identification method based on axial amplitude modulation signal of drill string is proposed.
提出了一种利用钻柱轴向振动调幅信号实现岩性识别的方法。
Finally, the paper introduced effective control methods of common drill string vibration and deviation problem.
最后对常见的钻柱振动和井斜问题介绍了有效的控制方法。
The helical flow of power-law drilling muds in the drill string was studied both theoretically and experimentally.
本文从理论和实验方面研究了石油钻井泥浆常用的幂律液体在钻柱中的螺旋流动规律。
The flexible drill string is one of the key tools to materialize the high accuracy directional drilling technique.
挠性钻杆是实现高精度定向钻孔技术的关键器具之一。
A velocity wave and a stress wave resulting from the stress variation are transmitted downward along the drill string.
悬点的应力变化产生速度波和应力波沿钻杆向下传递。
However, the accident of drill string damage happened easily in the overthrust nappe belt of these regions in the drilling.
但是，在其逆掩推覆带钻井作业中，极易发生钻具失效事故。
Although most of kicks occur when pulling the drill string from the hole, it is also possible for kicks to occur while tripping in.
尽管大多数井涌都发生在起钻的时候，但下钻的时候也会发生井涌。
This article takes the near-bottom drill string in an extended reach well as the subject to study the drill string vibration rules.
以大位移井近井底的钻柱为研究对象，分析了钻柱振动行为所遵循的规律。
Finally, in order to control the well path by dynamics, great attention should be paid to the interaction between bit and drill string.
为了实现依据钻柱动力学的井眼轨迹控制，应特别重视钻柱振动特性与钻头受力状况的相互影响。
Light lateral and axis and torsion vibrations do not affect the normal work, but the resonance state has severity effect to drill string.
轻微的横向、轴向及扭转振动不影响钻井的正常作业，而钻柱的共振状态会对钻井产生严重的影响。
Light lateral and axis and torsion vibrations do not affect the normal work, but the resonance state has severity effect to drill string.
轻微的横向、轴向及扭转振动不影响钻井的正常作业，而钻柱的共振状态会对钻井产生严重的影响。
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