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。
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。
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。
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。
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。
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。
The people pay attention on raising the span of the usage of the thread of drill collars and preventing the accident of drill string thread failure.
预防钻柱螺纹失效事故发生和提高螺纹连接使用寿命的技术长期以来倍受关注。
It has a practical meaning for the strength design and combination usage of drill string, casing and tubing under different technological conditions.
对处于不同工艺条件下的钻柱、套管、油管的强度设计和组合使用等均有实际意义。
The tangency point of Bottom Hole Assembly is located at where the drill string just touches the wall of the borehole, and the contact force is zero here.
在计算底部钻具组合的受力和变形时，以前一般都是按弯矩为零的条件来确定其上切点的位置。
Drill string vibration is a common phenomenon in the process of well drilling. Drilling string resonance is the main reason of the drilling string failure.
钻柱振动是在当前钻井工程中的普遍现象，对钻井的影响很大，钻柱共振是钻柱失效的主要原因。
The effects of WOB fluctuation of drill string on the wellbore trajectory are analyzed by using stochastic finite element method and perturbation equation.
借助随机有限元方法和摄动方程初步分析了钻压波动对井眼轨迹的影响。
According to the mechanics analysis method of BHA and the real work state of drill string in inclined straight well, a mechanical model of BHA is presented.
根据现有钻具力学分析方法和斜直井钻具的实际工作状态，建立了斜直井下部钻具力学分析模型。
Drill string vibration of deep Wells is studied in the article. The axial vibration, lateral vibration and torsional vibration of drill strings are analyzed.
文章研究深井钻柱的振动问题，以深井钻柱为研究对象，分析研究了钻柱的纵向振动、横向振动及扭转振动。
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