Application of decision tree algorithm on three-dimensions drilling speed equation

The paper introduces the general situation of theory research on reciprocity between drilling bit and stratum and the research on decision tree. After one kind of three-dimensions drilling speed equation method is given, the paper presents the solution of the equation. Based on the information of the practice well already gotten, the paper concludes new information about the stratum and drilling bit of it can be used in the course of decision. The paper puts up different decision tree by the two algorithms of ID3 and EMID, analysis and compares the benefits and shortages of the two algorithms.