石油钻头是石油钻井的重要工具，是在开采石油时用于钻取石油的，其工作性能的好坏将直接影响钻井质量、钻井效率和钻井成本。
1998年，神秘的“有机体”在石油钻头样品中被找到。
In 1998, mysterious' organisms' were found in petroleum drilling samples.
本文通过焊接试验、显微分析和磨损试验论述了以铬、镍、铁基合金代替钴、铬、钨合金作石油钻头牙爪堆焊耐磨合金的问题。
In this article we discussed the possibility of replacement of cobalt alloy by Cr-Ni iron Base alloy in drill bit bearing on the basis of welding test, wearing test and microscopic examination.
他其实就是一个工具推销者，卖钻头给开采石油的公司。
He was a tool pusher essentially, sold drill bits to oil-drilling companies.
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