... 钻井驳船：drilling barge,drilling scow,barge unit 钻井变量：drilling variable 钻井报表：driller's report ...
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controllable drilling variable 可控钻井参数
non controllable drilling variable 不可控钻井参数
multi-variable drilling rate equation 多元钻速方程
PDC variable diameter drilling bit PDC变径钻头
variable drilling rate equation 多元钻速方程
variable frequency drilling rig 变频钻机
Providers rotation torque to 17,500 ft-lbs (23,727 Nm) with variable rotation speed to 180 RPM for exceptional horizontal and direction drilling performance.
最高转矩17，500 英尺·磅（23，727 牛顿·米），可变转速最高180 转/分，带来无与伦比的水平钻井与定向钻井性能。
On the basis of optimized vibratile drilling mono -material test, the optimized value variable parameter is selected for vibratile drilling test of two kinds laminated materials.
在单材料优化振动钻削实验的基础上，进行了两种叠层材料按优化值变参数的振动钻削实验。
On the basis of optimized vibratile drilling mono-material test, the optimized value variable parameter is selected for vibratile drilling tesl of two kinds laminated materials.
在单材料优化振动钻削实验的基础上，进行了两种叠层材料按优化值变参数的振动钻削实验。
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