大自然是不肯轻易亮出自己的财宝的。它往往把石油隐藏在三、四千米,甚至五、六千米的深处。若是我们想把它开采出来,那就得钻一口很深的油井,使它与油层连通起来。目前,在钻井方面,应用最广的是涡轮钻井法。所谓涡轮钻井法,就是把涡轮机装在钻杆的末端,直接在井下带动钻头进行钻井的方法。钻井用的涡轮机,以其工作原理来说,和水力发电站中的涡轮机完全一样,所不同 Nature does not readily reveal its own treasures. It often hides oil in depths of three or four kilometers, or even five or six kilometers. If we want to extract it, we must drill a deep well to connect it with the reservoir. At present, in terms of drilling, the most widely used is the turbine drilling method. The so-called turbo drilling method is to install the turbine at the end of the drill rod and directly drive the drill bit downhole to drill. Drilling turbines, by their working principle, are exactly the same as turbines in hydroelectric power stations.