COMPREHENSIVE EVALUATION AND OPTIMAL SELECTION OF DIAMOND BITS USING GREY DECISION THEORY

The basic principle of the Grey Decision Theory was discussed and the technical and economicbenefits of diamond bits were comprehensively evaluated using the grey theory. After the testing and verifying in scientific researches and drilling practice in recent ysars in the western Henan,the diamond bits are selected optimally, which are of high efficiency,long life and good benefits.