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compound drive drilling
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compound drive drilling
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钻井方法
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compound drive drilling
复合驱动钻井
钻头的驱动由地面驱动(转盘驱动或顶部驱动)和地下驱动(一般为井下螺杆钻具或涡轮钻具)两部分组成,钻头的转速是两部分驱动转速合成的钻井方法。
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