Stones drilling bit: Use for drilling stones, concrete, firebrick etc.
摘要：石材钻头：适用于石材、混凝土、耐火材料的钻孔。
Stones drilling bit: Use for drilling stones, concrete, firebrick etc. Various type and specification.
石材钻头：适用于石材、混凝土、耐火材料的钻孔。各种型号及规格。
A set of calculating formulae for vertical milling teeth of drilling bit cones is derived herein from cutting rows with Angle cutters.
本文从尖角铣刀割圆出发，拟出了一套钻头牙轮直铣齿的计算公式。
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。
Along with the oil prospecting and production, the existent drilling bit (steel and tungsten carbide tooth bit) was not effective in some complicated stratum.
随着油气勘探开发的不断深入，现有牙轮(钢齿、镶齿)钻头已难以对一些复杂地层进行有效的钻进。
The method could let us to select the drilling bit rapidly and make the deviation between the porosity pressure calculation and the real measure less than 10%.
该方法能快速优选钻头类型，使地层孔隙压力的计算与实测误差小于10 %。
The invention comprises a handle and a drill bit, wherein the drilling bit has a trocar structure consisting of two parts, namely a sleeve and a tube core needle.
本发明包括手柄和钻头，钻头为套管针结构，包括套管和管芯针两部分组成。
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。
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。
Compared the result of the simulate model with the experimental data that collected by the Lab. of Drilling Bit in Southwest Petroleum Institute, the model has been validated.
通过将仿真模型的计算结果与西南石油学院钻头研究室部分台架实验结果进行对比，验证了该仿真模型的正确性。
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。
He thought that ordinary people would not sleep with his head resting on a drilling bit. Even if he rested his head there, he still couldn't fall asleep. However Wang Jinxi felt so fast asleep.
他心想，一般人不会枕着钻头睡觉，就是枕了也睡不着，可王进喜却睡得这么实这么香。
Using this model, using pattern recognition method can be carried out on the work area of other pending drilling bit selection, to improve the drilling rate when drilling to reduce drilling risk.
应用该模型，采用模式识别法可对工区其它待钻井进行钻头推选，从而提高待钻井的钻井速度，降低钻井风险。
Objective:To introduce a new prefabricated post-and -core system, a helical drilling bit and a prefabricated post-and -core consisting of a root canal orifice bur which was designed by the author.
目的：介绍一种由螺旋型根管钻、自行设计的根管口台阶状车针、预成桩核组成的预成桩核系统。
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 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。
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。
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。
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。
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