Development and application of diamond drill bits in high altitude mining area;

The experiments on several Japanese natural diamond bits;

In this paper, the author have introduced the status quo of diamond bits and tools' wide-adaptability, and discussed its research meaning, necessaries as well as the supporting work of needs in future.

Particular uses of the method are described in regard to the evaluation of φ60mm wireline diamond bits.

The experimental study on the new pattern diamond bit with high drilling speed;

Efficient methods applied in skidding strata with diamond bit and its history cases;

Field test of electroplated diamond bit and analysis of its performance;

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.