Low Energy Consumption for Fragmentizing Rocks Is An Important Criterion for Designing Drill Bits in Hard and Abrasive Formations

Abstract:

In drilling deep holes hard and abrasive formations are found often. When drilling in these formations the results of drilling are not satisfied with. It is recommended to design new type drill bits according to the criterion about low energy consumption for fragmentizing rocks. The results of lab experiments show， that the bits with convex and concave cutting edges in matrix sectors，designed and manufactured according to the criterion， are better， than bits， manufactured according to conventional flat face matrix in penetrate rate， abrasiveness of the matrix and energy consumption for fragmenting rocks. Therefore， the new type diamond impregnated drill bits should be paid our special attention to.