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。

Drill string resonance is the major cause of drill tool failure.

钻柱共振是引起深井钻具失效的主要原因。

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。

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。

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。

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。

You must keep trying to find a different way to protect the drill string from sticking.

你们应该周旋设法找出提防钻具被卡的新方法。

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。

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。

Provided the basis and direction for the drill string failure of the general state of the treatment.

给钻柱的一般状态下的故障的处理提供了依据和方向。

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 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。

According to the torque value, calculating that of drill string downhole, and checking the safety of the drill string.

根据该扭矩值推算到井下钻柱的扭矩值，并且校核了各点钻柱的安全性。

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。

Drill string receives the complicated stress which is tension-compression stress, torsion stress, bending stress, etc.

在长期工作中，钻具承受拉伸、压缩、弯曲和扭转等复杂应力。

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。

Drills (kick drills) according to kick control procedures as required will be performed with the drill string inside the casing shoe.

根据情况，钻具处在套管鞋时，遵照井涌控制程序，搞一次演习。

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。

The drilling jar which is connected with drill tool and worked with drill string is a downhole stuck freeing tool in drilling operation .

随钻震击器是连接在钻具中随钻柱一起进行钻井作业的井下解卡工具。

When the force can not contact drill string with one side of the borehole wall, the stiffness of drill string can influence the contact force.

当外力不足以使钻柱紧贴于井壁的一侧时，钻柱的刚度对钻柱与井壁之间的接触力有影响。