2 Mine used small-diameter pilot drilling,then gradually reaming the borehole and finally completed to designed size.
宣东二号矿布设施工的大口径瓦斯抽放井以小口径导向钻进,后逐级扩孔成井。
During theoretic research and field practice, we researched the steerable drilling horizontal section, programmed the mechanical analysis software of steerable drilling assembly with Weighted Residuals Method, and studied the rotary drilling build-angl.
在水平井井眼轨迹控制施工中 ,导向钻井系统在斜井段和水平段的施工中均获得了显著的技术经济效益。
This paper recounts the experiences of enhancing drill effectiveness, shorting well building period, saving cost and accurately controlling borehole trace by using guide drilling system in the production process of drilling cluster in the area of Bohai Liaodong Bay.
本文介绍了渤海辽东湾地区在钻探丛式生产井过程中,使用导向钻井系统提高钻井时效,缩短建井周期,节约成本,精确控制井眼轨迹等方面的经验。
An awl with a beveled tip, used to make holes in wood for brads or screws.
锥钻，打眼钉钻头倾斜的钻子，用于在木头上钻孔以钉角钉或螺钉
A gimlet for tapping or broaching casks.
手钻用来敲出或刺桶的钻子
It was fun to play with an awl.
玩钻子是件很有趣的事。
a rotating drill powered by an electric motor.
用电发动机驱动的旋转的钻子。
"But of course," the captain said. "To begin with, I use an awl."
“好吧，”上尉说道，“首先，我用的工具是钻子。”
bit cutting angle
钻冠的尖度，钻头磨角，钎子头刃角
You don't wait long when you have an advantage, do you?
一有空子，你就钻，是吧？
I had found a loophole.
我准备钻个小空子。
I saw a rabbit dive into its hole.
我看见一只兔子钻进洞。
The road dives into its hole
那只兔子钻进它的洞内。
a series of tube (joined by screwed collars) that connects a drilling platform to the drilling bit; rotates the bit and supplies drilling mud.
一系列管子（由保险螺丝连成的）把钻探平台连到钻头的一系列管子；转动钻头和提供钻泥。
As the bit drills down, pipe is added length after length .
随着钻头往下钻，管子一段一段地加接上去。
A rabbit lopped among cabbages.
一只兔子在白菜之间一跳一跳钻来钻去。
The hamster had got through the wire at the front of its cage.
仓鼠从其笼子前部的栅栏处钻出去了.
Nadiensky ducked into the back of the car.
纳齐恩斯基一头钻进车子的后座。
Take out the books and let me get into the bag.
把书拿出来让我钻进你的袋子里。
he clambered up onto the stage and got the actors to help him into the box.
他登上舞台让演员帮着他钻进了盒子。
And at this time,a grain of sand entered inside her. '
这时，一粒沙子钻进了她的身体?