查询词典 drill bit

On the base of above models and theories, three new kinds of bits, i.e. extended nozzle roller bit, self\|resonating water jet bit and combined jet and mechanical rock\|cutting bit, are developed.

当时 ，部分学者片面认为水射流的压力越高越好，日本研究出 170 0MPa的增压器，前苏联和美国研究出 56 0 0MPa的脉冲射流发生器。

Finally rescued, of course, he is no good, just a little bit more senior than me, his eyes little better than I freshman nose quite a bit better than I, elegant style of conversation than I am a little bit of it.

杰西克终于救出来了，当然，他也没什么好的，只不过比我高一点点，眼睛比我大一点点，鼻子比我挺一点点，谈吐比我优雅一点点而已。

A new model of bit commitment named three-party bit commitment is proposed in this paper, in which two provers jointly commit a bit to a verifier.

该文提出了三方比特承诺模型，在该模型中，由两个证明者共同向一个验证者作出承诺。

In order to raise drilling speed of the non saline dome wells in Kenkiyak Oilfield, the relationship between rake angles of the cutter, profile of the bit, which have effect on cutting depth and impact-resistant of PDC bit cutters, and cutting efficiency is studied respectively using finite element analysis according to rock properties of the research area. The structure of the PDC bit is then optimized by using the research result.

为提高肯吉亚克油田非盐丘井钻井速度，根据地层岩石力学参数评价结果，利用有限元方法对影响PDC钻头攻击性和抗冲击性的齿前角、冠部形状等结构参数与破岩效果之间的关系进行了研究，并对PDC钻头的结构进行了优化设计。

Using the method integrating geoscientific research with bit selection research, analysis is made on the stratigraphic-lithologic characteristics of all geological intervals in the area, the effect on bit selection and how to increase drilling speed is made clear. Based on the above, the conceptual profiled design for bit selection and drilling methods of all geological intervals is proposed on the basis of the stratigraphic-lithologic characteristics.

应用地学研究与钻头选型研究相结合的方法，对该地区各地质层段的地层产状与岩性特征进行了分析，获取了钻头选型对提高钻井速度影响的认知，提出了基于地层产状与岩性特征的各地质层段钻头选型及其钻井方式的轮廓化概念设计。

Eatures · Compatible with MCS-51 Products · 2K Bytes of Reprogrammable Flash Memory – Endurance: 1,000 Write/Erase Cycles · 2.7V to 6V Operating Range · Fully Static Operation: 0 Hz to 24 MHz · Two-Level Program Memory Lock · 128 x 8-Bit Internal RAM · 15 Programmable I/O Lines · Two 16-Bit Timer/Counters · Six Interrupt Sources · Programmable Serial UART Channel · Direct LED Drive Outputs · On-Chip Analog Comparator · Low Power Idle and Power Down Modes Description The AT89C2051 is a low-voltage, high-performance CMOS 8-bit microcomputer with 2K Bytes of Flash programmable and erasable read only memory.

eatures ·兼容MCS - 51的产品·及2k字节的编程快闪记忆体-耐力： 1 000写/擦除周期·在2.7 V至6 V的操作范围·完全静态的运作： 0 Hz至24兆赫·两个层次的程式记忆体锁· 128 × 8位内部RAM · 15个可编程I / O线·两个16位定时器/计数器· 6中断源·可编程串行UART的频道·直接驱动LED产出·单晶片模拟比较·低功耗的闲置和掉电模式描述该AT89C2051的是一个低电压，高性能的CMOS 8位微机与及2k字节的Flash可编程和可擦除唯读记忆体。

The tortuosity can be described by bit weight in axial direction and the angle change of drill string bynormal can be considered as the torsion angle of the borehole.

弯曲主要体现为狗腿度，挠曲就体现为井眼的扭转。这种空间挠曲和弯曲特性可以通过测量轴向不受钻压作用的下部钻具组合的变形来描述。

It has to be tall because it is like a giant block and tackle, and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

井架必须很高，因为它像一个巨型滑轮组。我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

It has to be tall because it is like a giant block and tackle, and we have to lower into the ground NEW CONCEPT ENGLISH-BOOK FOUR and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

井架必须很高，因为它像一个巨型滑轮组。我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

It has to be tail because it is like a giant block and tackle, and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom

井架必须很高，因为它像一个巨型滑轮组。我们必须把很大的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。