The measurement and analysis of craters and bottom-hole pattern is an important link of drilling test and a key means of studying rock-breaking mechanism and valuating rock-breaking efficiency.

• 岩石破碎坑和井底的测量分析是钻头实验技术中的重要环节,也是钻头破岩机理研究和钻头性能评价的重要手段,而现有的测量分析方法精度或效率较低。