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空气-泡沫钻井,因其钻速快,防漏效果好,具有常规钻井液不可比拟的优越性。空气粉尘钻井在干硬地层机械钻速达到16.24m/h。雾化钻井在出水量较小时,钻速为13.16m/h,当地层出水较多,空气压力较高时,其钻速与泡沫钻井速度相当。但泡沫钻井腐蚀钻具轻微,而雾化钻井腐蚀钻具严重。因此,必须根据地层情况选择合适的钻井流体,既要提高机械钻速,又要保护钻具,提高综合经济效益。
Air-foam drilling, because of its fast drilling speed, leak-proof effect, with conventional drilling fluid incomparable superiority. Air dust drilling in dry and hard formation of mechanical penetration rate reached 16.24m / h. When the amount of water outflow is low, the drilling rate is 13.16m / h. When there is more water in the formation, when the air pressure is higher, the drilling rate is the same as the foam drilling speed. But foam drilling corrosion drilling minor, and atomization drilling corrosion drilling serious. Therefore, we must choose the right drilling fluid according to the formation conditions, it is necessary to improve the ROP, but also to protect the drilling tool to improve the overall economic efficiency.