新的钻探泥浆(用于在操作时冷却钻头)也在开发中。

Also in development are new drilling muds that cool the drill bit during operation.

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当拉出钻头时，横梁(上面缠有绝缘体和导体的金属结构)将它架起，形成一个新的支架。

While pulling out the drill, crossbeams (metal structures on which insulators and conductors are mounted) are attached to a new support.

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在地层、钻井参数和钻头新度相同的情况下，钻头机械钻速的快慢主要取决于钻头齿面结构是否合理。

While drilling in the same formation with the same drilling parameters, the penetration rate of bits of the same degree of wear depends mainly on their cutting structures.

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