Through experiment it proves that ceramic thermo-mechanical drill bit is feasible.

By the analysis of the joint heat in the switch cubicle,point out its main cause,several monitoring methods for the cubicle inside are compared.

The paper introduces the technology improvement on medium frequency furnace for traditional hot pressing diamond bit,such as control on starting scan,medium frequency power supply,automatic adjustment for impedance and temperature control on closed-loop.

Research of diamond weak combined bit for high geo-stress stratum drilling;

Research into the new electroplating weak-holding diamond bits;

Research,development and application of the series core drilling bit for uranium exploration;