查询词典 drill bit

The present invention relates to a rock drill bit (1) for percussive drilling.

本发明涉及用于冲击钻孔的岩石钻头(1)。

The present invention relates to a drill bit intended for percussive rock drilling.

本发明涉及一种用于冲击岩石钻孔的钻头。

Power drill tool and PDC bit are used to ensure wellbore quality and penetration rate; polysulfonate potassium drilling fluid system is used to ensure downhole safety.

应用动力钻具配合高效PDC钻头钻井技术，保证了井身质量和钻井速度；应用聚磺钾盐钻井液体系及相关安全技术措施，保证了井下安全。

This means you'll need to get out that 1/32 bit again and drill holes for the new rungs.

这意味着您需要获得指出， 1 / 32位，再次与孔为新梯矢。

A study on self-excited oscillation nozzle for a drill bit［J］.

石油钻井钻头用自激振荡喷嘴的研究［J］。

Change the drill to a3.0-mm bit. The C2 spinous process was pushed entrally to achiee ideal reduction.

将钻换成3.0mm。将C2棘突向腹侧推以达到理想复位。

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

井架必须 ssbbww。 c om 很高， 8 Tt t 8。 com 它像一个巨型滑轮组。 sSBbWw 必须 ssbbww。 c om 把很长的钻杆一节节地钻入地下， 8ttt8.com 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。

Some experimental results are shown. According to the results, using tricorn bits assembled the SEOPYN to drill oil well, the ROP increases by 8%～77%, and the rates of the footage for trienrn bit increases by 6.7%～44.0%.

本文在稳态brush轮胎模型基础上，通过印迹前端蹼处胎冠一阶变形模型，建立了轮胎制动力－滑移率的动态模型，并根据转鼓试验台上的轮胎制动试验，验证了该模型的仿真效果。

C. With a 1-1/2 spade bit drill holes into 2x4 yellow pine for one battery pack discharge.

使用 1-1/2 铲形钻咀，於 2x4 黄松木上钻孔，一个电池包。

Next, take the rock mechanics as a foundation, has analyzed the gas drilling broken rock mechanism; Thought that the gas drilling broken rock mechanism is different with the conventional drilling fluid well drilling, the bottom of the well rock destruction way destroys for the volume, the bottom of the well rock and the drill bit contact plane disproportionality causes the gas well drilling well diviation another reason.

其次，以岩石力学为基础，分析了气体钻井破岩机理；认为气体钻井破岩机理不同于常规钻井液钻井，井底岩石破坏方式为体积破坏，井底岩石与钻头接触平面不均衡性是导致气体钻井井斜的又一原因。

Continuously improve the production mechanism, to provide customers with better quality products and services.

不断的完善生产机制，给客户提供更优质的产品及服务。

B:Yes, he was the very prize-winner in the court tennis ten years ago?

是的，他是十年前的世界网球冠军。