In petroleum and geological exploration drilling, PDC bits have obtained good drilling results in middle hard and some hard rocks, resulting in satisfactory technical and economic indexes, and been accepted by drilling users. However, while they are used in complicated formations, such as drilling in hardness-changing formation, fractured formation and abrasive formation, the penetration rate is often slow with short bit life. In order to tackle above-mentioned problems, Russian specialists have designed a new elongated, stabilized and vibration-reduced PDC drill bit. Laboratory and field experimental results with the bit show that the bit is effective in the field with good technical and economic results.