• A drilling technique whereby gases (typically compressed air or nitrogen) are used to cool the drill bit and lift cuttings out of the wellbore, instead of the more conventional use of liquids.

    空气钻井一种钻井工艺,是利用气体冷却钻头岩屑举升油井环空,而不是利用使用流体

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  • The drill bit body has three wings four cylindrical tungsten carbide inserts and curved slots for removal of cuttings.

    结构上采用齿的钻头形排粉沟槽,适用于硬、中、软岩的三种齿形。

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  • The drill bit body has three wings four cylindrical tungsten carbide inserts and curved slots for removal of cuttings.

    结构上采用齿的钻头形排粉沟槽,适用于硬、中、软岩的三种齿形。

    youdao

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