Cone bit is a bit slow, that cone speed is smaller than the speed of the drill, mainly scraping broken rock, suitable for high speed, high WOB sidetracking of old wells, old wells deeper wells, etc. Eye drilling operations play an important role in the drilling. Cone bit advantages: relatively wide application field, not only for side drilling, and can be used in deep wells, the drilling has demonstrated important advantages.

      Tricone rock bit of both the advantages and PDC drill bits, tricone bit more than for both strength and ductility are large formations, but also can be applied to PDC bit difficult to deal with hard interlayer and other complex formation.
     Tricone bit must take into account the quality of the material of the capital and the strength of the set period, the mold material selection is necessary to meet customers' production of wind-induced volume requirements.
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