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自从１９９１年吐哈油田推广应用ＰＤＣ钻头以来，ＰＤＣ钻头以其使用效率高，能显著提高机械钻速、降低成本、经济效益好等特．点，被广泛推广应用，由于ＰＤＣ钻头主要适应钻软至中硬地层，钻头下井工作时间长，所钻井段也较长，在使用过程中容易出现起钻拨活塞、下钻划眼等复杂情况，严重影响ＰＤＣ钻头的使用效果，我们从ＰＤＣ钻头的破岩机理，所钻地层的岩性特点入手，对使用ＰＤＣ钻头的钻井液性能参数及现场维护处理工艺技术进行了研究，达到提高机械钻速，减少并下复杂情况的目的．
Since the promotion of the PDC bit in Tuha Oilfield in 1991, the PDC bit has been used with high efficiency, which can significantly improve the ROP, reduce the cost and have good economic benefits. Point, is widely used, since the PDC bit is mainly adapted to drill soft to medium hard formations, drill bit down time for a long time, the drilling section is also longer, easy to appear in the process of using the drill dial piston, drill under the eyes and other complex situations , Which seriously affected the using effect of PDC bit. Based on the mechanism of rock breaking of PDC bit and the lithology of the drilled layer, we studied the drilling fluid performance parameters and on-site maintenance process technology of PDC bit, Speed, reduce and complex situations.