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。
A new type rock bit with bearing liner structure has been developed and tested on the spot.
研制了一种新型的镶套轴承结构牙轮钻头，并进行了现场试验。
Assemble inserts and cones respectively, and prepare for calculating 3d engaging distance of tri-cone rock bit.
对牙轮和牙齿分别进行了装配，为三维啮合间隙计算做了充分准备。
There are many causes inducing rock bit cone break, in which the effect of its machining on the cone is more serious.
造成钻头牙轮破裂的原因是多方面的，其中钻头机加工对牙轮开裂的影响较大。
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。
With 20 rock bits which used in the field, bearings surface metallography, rigidity, and the main factors influence the life of the rock bit journal bearings were studied.
收集了近几年20只现场失效牙轮钻头，对其轴承表面金相组织和硬度以及影响牙轮钻头滑动轴承失效的主要因素进行了分析。
With 20 rock bits which used in the field, bearings' surface metallography, rigidity, and the main factors influence the life of the rock bit journal bearings were studied.
收集了近几年20只现场失效牙轮钻头，对其轴承表面金相组织和硬度以及影响牙轮钻头滑动轴承失效的主要因素进行了分析。
The structure of tri-cone rock bit is complicated. As the cutting structure touch the stratum directly, it affects the process of breaking rock and the performance of tri-cone rock bit.
三牙轮钻头结构复杂，其中齿面结构直接与地层接触，对于岩石破碎过程和钻头工作性能的影响最大。
On the basis of the interaction model between formation and rock bit, a lateral vibration dynamic model of the rock bit was established under the interaction between drilling string and rocks.
在建立牙轮钻头与井底岩石互作用模型的基础之上，建立了基于钻柱和岩石互作用下的牙轮钻头横向振动动力学模型。
The paper introduced the successful application of high bench caving method of using deep hole roller rock bit into the practice of solving the complex goaf area, a stuff problem of this kind.
采用深孔牙轮钻机、利用高台阶崩落法成功地处理了复合采空区，解决了复合采空区处理难的问题，使技术人员在熟练浅采、深采空区处理的情况下，又探索出复合采空区的处理方法。
We've already talked a bit about the growth of extreme sports like rock-climbing.
我们已经讨论了一些攀岩等极限运动的发展。
He looked a bit like an aging member of a British progressive-rock group.
他看起来有一点像英国的进步摇滚团队成员。
Physicist Sean Carroll has become a bit of a rock star in geek circles by attempting to answer an age-old question no scientist has been able to fully explain: What is time?
物理学家肖恩·卡罗尔(Sean Carroll)就是其中之一。他因为尝试去回答一个目前还没有科学家能够真正解释的古老问题，已经有了一点极客圈摇滚明星的感觉；这个问题就是：时间是什么？
A universal method of bit selection was presented in consideration of the rock mechanics properties of formation and economic benefits of the bit.
提出了一种既考虑地层的多种岩石力学特性又考虑钻头经济效益的具有通用性的钻头选型方法。
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。
Finally a passing pedestrian side slopes, the slope is a cloud-like sheep, a huge rock on a sat bit haggard old man embrace a whip, is overlooking the distant.
最后一行人路过一面山坡，坡上是云彩般的羊群，一块巨石上，坐着一位形容枯槁的老者怀抱着一杆鞭子，正在向远方眺望。
This allows the bit to drill around a central cylinder of rock, which is taken in through the bit and into the core barrel.
这样允许钻头围绕岩石的中心圆柱体钻进，并通过钻头进入取芯桶。
I don't really like classifying music into genres lately. What's the point? Pop music is a bit of dance, rock and hip hop these days.
我不喜欢最近对音乐类型的划分。有什么意义呢？流行音乐最近也融合了舞曲，摇滚，嘻哈等多种风格。
Completing control method of well path due to the rock characters and the interaction between bit and formation.
根据地层岩石特性及钻头与地层的相互作用关系，完成井眼轨迹控制方法。
Aimed at the formation characteristics in Tahe area and rock breaking mechanism of PDC bits, the QP19L PDC bit fitting for this formation is optimized and the technical measures are summarized.
针对塔河地区的地层特点和PD C钻头的破岩机理，优选了适合于该地层钻进的QP 19 - L型PDC钻头，总结了PD C钻头的使用技术措施。
Because besides rock music, there is a little bit of classical instrumental pieces. Do you think you will ever use like Chinese traditional instruments in your music?
除了摇滚曲风，好像还有一些传统的音乐曲风。你有没有想过在自己的音乐中使用传统的中国乐器？
The results of field tests proved that PDC anchor bit is ideal in mid hard rock drilling.
现场试验结果表明，PDC锚杆钻头是钻进中硬岩层的理想钻头。
To drill soft, unconsolidated, usually shallow formations by eroding the "rock" below the bit by hydraulic impact loading alone.
钻进松软、非固结，通常是浅地层时，通过仅仅依靠液力冲击载荷去冲蚀破碎钻头下的岩石。
The invasion process is complex. It is generally considered to start with a short initial spurt loss when the bit penetrates the rock.
侵入过程复杂，通常认为当钻头穿透岩石时，随着一个短期的初触失水而开始侵入过程。
The formation of the bottom hole rock-disintegrating track of the mono-cone bit with wedge teeth was studied, and simulation software for the track pattern was developed.
在此基础上以楔形齿为对象研究了偏心单牙轮钻头井底破岩轨迹的形成，并编制了井底轨迹图仿真软件以模拟牙齿的凿岩轨迹。
All you need is a knife and a bit of rock salt, which also adds great flavour!
您所需要的是一把刀和一个位岩盐，这也增添更多的色彩！
Different lip shape and matrix formula of coring bit apply to various coring work in complex rock. The core can provide reliable data to geological and engineering research.
取芯钻头不同的唇面形状、胎体配方可适应各种复杂岩层的取芯，所钻取的岩芯将为地质和工程研究提供可靠的数据。
According to practical working situation, nonlinear dynamic finite element method is adopted to establish a numerical model of combined breaking rock with high pressure water jet and mechanical bit.
采用非线性动态有限元法，结合实际工况条件，建立了高压水射流—机械齿联合破岩的数值模型。
According to practical working situation, nonlinear dynamic finite element method is adopted to establish a numerical model of combined breaking rock with high pressure water jet and mechanical bit.
采用非线性动态有限元法，结合实际工况条件，建立了高压水射流—机械齿联合破岩的数值模型。
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