Oil companies are drilling into rock layers where every square centimeter (0.16 square inch) is subject to pressure equivalent to the weight of a medium-sized car.
石油公司所开采的岩层上，每平方厘米所承受的压力相当于一辆中等大小的汽车。
Zhao Dong drilling platform is a fixed drilling platform which weight is 6200tons.
赵东油田的钻井平台为固定式钻井平台，该平台总重量达6200吨。
The results show that the vibration of drilling strings will produce the fluctuation of weight on bits by random excitation, so the bit life and drilling rate are affected largely.
结果表明，在地层随机激励作用下，钻柱的振动将会引起钻压的波动，从而影响钻头的寿命及其钻进的速度。
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