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苏联自1956年帅先将人造地球卫星送入太空之后,今天又向相反的方向领先于世界各国,即到达地球内部的深度将居世界第一。他们在科拉半岛上的钻孔,钻进地下深度将突破12公里。科拉钻孔,其深度超过世界海洋中最深的海沟,该孔采用苏联自己设计的涡轮钻进法,与普通方法不同,钻进时,仅钻头转动,而从地表连接钻头的12000米长的钻杆则不转动,这样就可避免钻杆的磨损和断裂。使用的钻杆也非同一般,它是用轻质铝合金制成的,而不是用钢材,这样保证20层楼高的
After the Soviet Union took man-made earth satellites into space in 1956, it is now leading the world in the opposite direction. The depth to reach the interior of the world will be the highest in the world. They drilled holes on the Kola Peninsula and penetrated into the ground to a depth of 12 kilometers. Cora bores deeper than the deepest trench in the world’s oceans. The hole uses the Soviet Union’s own design of the turbo drilling method. Unlike ordinary methods, only the drill bit rotates when drilling, and the 12,000-meter-long length connects the drill from the surface. The drill rod does not rotate so that wear and breakage of the drill rod can be avoided. The drill pipe used is also unusual. It is made of lightweight aluminum instead of steel. This guarantees a 20-story building.