Tungsten Carbide Flat-top Button Shortcomings

It is obvious that flat-top tungsten carbide button would abrasive easily in some rock formation. According to incomplete statistics, almost flat-top tungsten carbide buttons are wasted when their 75% heights are not using. And the velocity of its plate enlarging is faster than the corrosion of the top. In addition, the longer diameter of the plat, which depresses the pressure between buttons and rock surface. Especially when impact load is insufficient, velocity of drilling would be influenced. So the efficiency of impact energy will be lower. Finally, due to the bottom of flat-top is flat, air inside the hole is hard to release to come into cushion when it has been set. So the pillar is unstable fixed.

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