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随着人造金刚石钻进技术的推广,在一些地层中钻进,出现了孕镶人造金刚石钻头“打滑”的情况,成了人造金刚石钻进及绳索取芯技术应用的一个突出障碍.因此,分析“打滑”的原因,设计合理的钻头结构,具有重要的现实意义. “打滑”地层的特点在石英质岩石如石英脉、石英岩、含铁石英岩以及硅化程度很高的流纹岩中钻进时,由于钻头结构不适应等原因,常出现“打滑”情况.这类岩石在力学性质方面有如下特点:
With the promotion of synthetic diamond drilling technology, drilling in some strata, the situation of “slippery” of impregnated synthetic diamond bit has become a prominent obstacle to the application of synthetic diamond drilling and rope coring technology. Therefore, the analysis The reason of “slippery” and the design of rational bit structure are of great practical significance.The characteristic of the “slippery” strata is that the quartz rock, such as quartz vein, quartzite, iron-bearing quartzite and rhyolite with high degree of silicification Progressive, due to improper drill bit structure and other reasons, often appear “slippery.” Such rocks in terms of mechanical properties have the following characteristics: