Water jet flow is one of the decisive factors for drilling rate during rock bit drilling.
在牙轮钻头的钻进中，水射流是钻进速度快慢的决定因素之一。
It is proposed that economical performance of diamond bits be quantitatively appraised by use of bit drilling cost.
并提出用钻头钻进成本定量地评价金刚石钻头的经济效果。
8 the rig is suitable for various drilling methods such as carbide bit drilling, auger drilling, DTH hammer drilling, follow - up casing drilling, etc. 3.
钻机可适用多种钻进工艺方法，如合金回转钻进螺旋钻进潜孔锤钻进跟管钻进等。
Also in development are new drilling muds that cool the drill bit during operation.
新的钻探泥浆(用于在操作时冷却钻头)也在开发中。
Bit is the tool of crash rock and rate of drilling is deep related with type of bit.
钻头是直接破碎井底岩石的工具，钻井速度的高低与钻头类型密切相关。
Bit gauges, rings of defined circumference, are slipped around drill bits to detect and measure wear, which reduces the circumference of the bit during drilling.
钻头规是种周长一定的环型物，它卡紧在钻头的周围，去检测和测量钻头是否磨损，即在钻井过程中是否减少了周长。
Does the drilling machine have broken bit and wrong bit size detection capability?
钻孔机是否有破损钻咀与不良钻咀尺寸鉴定能力？
This paper discusses the apply in the drilling engineering by the method of nonlinear limited element, which is about the torque of string and direction of bit and while drilling.
本文探讨了结构力学分析方法——非线性有限元性在预测水平井钻进中的工程应用。
Drilling practice show that formation and bit types are tow important factors effected drilling.
钻井实践表明，地层因素和钻头类型是影响钻井过程的两个十分重要的因素。
Through field testing, the PDC bit suited for Sulige gas field increased drilling speed and obtained good result.
通过现场试验，大幅度提高了苏里格气田的钻井速度，取得了显著的效果。
Through this experimentation, it indicates that the sampling bit added pumping hole ADAPTS to drilling in most fragmentized strata.
试验表明，增加了抽吸孔后的取样钻头适合在极其破碎的地层中钻进。
Because the drilling cost is not the sole cost of bit, it is necessary to discuss here the highest rotation speed of bit in cutting rock at the lowest drilling cost.
在研究钴进过程的最佳化生产条件中，由于钻探成本的开支不是唯一的一项钻头费用，所以就有必要对最低钻探成本的最高钻头切割岩石的旋转速度进行探讨。
The measurement of engineering parameters near the bit while drilling is of significant importance for the safety and efficiency in a drilling process.
钻井过程中，近钻头处钻压、扭矩等钻井工程参数的随钻准确测量对安全、高效钻井是十分重要的。
Based on the mechanical model of single bit, drilling loads on the cutting head of tunneling machine are simulated by means of computer in this paper.
基于单个截齿的受力模型，对掘进机截割头钻进工况载荷进行了计算机模拟，为截割头的结构设计和参数优化提供了理论依据。
Field tests also show that the self-resonating cavitation nozzle is highly effective in reducing bit wear, increasing drilling footage and drilling speed.
现场试验同样证实设计的自振空化射流喷嘴在保护钻头、减少钻头磨损及增加进尺、提高机械钻速方面有显著作用。
The results show that the vibration of drilling strings will produce the fluctuation of weight on bits by random excitation, so the bit life and drilling rate are affected largely.
结果表明，在地层随机激励作用下，钻柱的振动将会引起钻压的波动，从而影响钻头的寿命及其钻进的速度。
Drilling in gravel stratum is one of present difficulties in drilling area with low drilling speed, short service life of bit and high drilling cost.
卵砾石地层钻进是钻探的难题之一，不仅钻进速度低，钻头的使用寿命短，而且钻探成本高。
The mechanical analysis of the bit in the process of drilling is the bas- is of bit trajectory prediction.
对钻头在钻进过程中的受力分析是准确预测钻头轨迹的基础。
It discussed problems about wellbore structure, BHA, bit selection, drilling parameters and so on.
探讨了小眼井井身结构、钻具组合、钻头选型、钻井参数等问题。
According to the relation between the temperature and the ratio of the diameter of the defrosting zone to that of the drilling bit, the volume of washing fluid is optimized.
依据不同冲洗液温度时融化区直径与钻头直径比和冲洗液用量的关系，讨论了冲洗液用量的优化。
The single tooth cutting course of a PDC drilling bit is studied. The research is of great significance for improving PDC drilling bit design.
为了改进PD C钻头设计，在全尺寸试验的基础上，对PD C钻头单齿切削过程进行了试验研究。
This article briefly introduces the drill bit condition effected during drilling process and the program - Ming technique to drilling data.
简要介绍数控钻孔加工过程中，钻头的受力情况和对应钻孔程序的编制技巧。
We can analyse and diagnose bit working state based on integrated logging data. The main characteristic parameters for bit wearing degree are torque and drilling time.
钻头的工作情况可以根据综合录井资料分析判断，反映钻头磨损程度的主要特征参数有扭矩和钻时。
Problems and countermeasures of wireline coring drilling in "walk" formation in a uranium mine in Guangxi are introduced with type selection test for diamond drilling bit.
通过绳索取心钻进金刚石钻头选型试验，介绍了广西资源县向阳坪铀矿区“打滑”地层中绳索取心钻进存在的问题及采取的技术措施。
Everything on a drilling rig directly or indirectly assists the bit in crushing or cutting the rock.
在钻机上的每一种装置都直接或间接地有助于钻头粉碎或切割岩石。
Based on the analysis of "bit walk" in drilling, a concept of using weak diamond -holding matrix to get rid of "bit walk" is introduced.
前言：在分析钻进时钻头“打滑”原因的基础上，提出了利用弱包镶来解决“打滑”的思路。
The dynamic model reveals the dynamic action of string, it is instructive to design new rock bit and study drilling mechanics.
通过研究得出了一套研究钻柱系统动力学模型及求解方法，对新形钻柱的设计和钻井力学的研究具有指导意义。
Geometrical optics approach can only calculate the high frequency approach solution of drilling bit vibration source wave equation in non caustic area but it become invalid in caustic area.
由于几何光学法求解钻头震源波动方程的高频近似解有局限性，即在焦散区失效，故只能计算非焦散区的高频近似解。
Single pass drilling apparatus, use a one-piece drill bit, method and rock bolt for single pass rock bolting.
单通道钻孔装置，整个钻头的使用，用于单通道岩石锚固的方法和岩石锚栓。
The system can provide effective guidance for enhancing exactness of bit failure analysis, improving bit design and evaluation, and selecting proper bit for exploration drilling.
该系统对提高钻头失效分析的准确性、提高钻头设计、评价、探井钻头选型的针对性具有很强的指导作用。
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