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长庆气田水平井PDC钻头防泥包技术

Natural Gas Industry(2009)

Cited 23|Views2
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Abstract
为实现长庆气田水平井钻井提速的目的,在斜井段中试验了PDC钻头,但均不同程度地发生了钻头泥包的问题。经过广泛的调研分析,找到了导致PDC钻头泥包的主要因素——钻井液问题,另外还有地层、钻井参数、PDC钻头流场设计等影响因素。为此,从强化钻井液抑制性出发,研制出了双钾盐聚合物钻井液体系并在现场应用获得成功,较好地解决了PDC钻头泥包问题。其中GP12-6井实现了斜导眼水平井单只PDC钻头穿越5套地层,平均机械钻速达11.25m/h,起下钻、电测和下套管等作业均安全顺利完成。
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Key words
PDC bit,Changqing gas field,polymer drilling fluid containing bi-potassium salts,drilling speed,drilling parameter,bit balling,horizontal well
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