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Drilling
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variable-speed
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Chinese
constant rotary speed variable weight
稳定转速改变钻压钻井法
constant rotary speed variable weight
定转速变钻压
法
variable speed
fluid drive
变速液动
variable weight and rotary speed
选择钻压-转速最佳配合的钻井方法
variable weight and rotary speed
最优化钻井方式
变钻压和变转速
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