As a kind ofdrilling bit rock formation has been widely used, significantly improved bitfunction of direct reduce drilling cost, especially in nearly a decade toimprove the fastest. Use life and drilling rate can target two properties, their effects on final bit drilling capital levels. Progress bit rate of penetrationand the use of the useful way of life is to reduce drilling cost and havematerial proved that the drilling rate improved than the bit life improvementto reduce the effects of drilling cost is bigger, it bit cutting structureimprovement is the most direct way to progress the bit rate of penetration. Since a long time, people to the improvement of cutting structure first focuson the main cutting tooth structure, such as tungsten carbide tooth structureaspect, people has created a wedge, shovel teeth, such as partial teaspoons oftooth, tooth wear, and so on. The coming ten years, people gradually view togauge structure also has large influence on the bit rate of penetration andlife, especially in the high Angle Wells and well use bit of gauge withreasonable structure, many new gauge structure were seminars to develop and useto the cone bit superior results are obtained.
As a kind of drilling bit rock instruments has been inuse, bit function of distinct improvement directly reduce the drilling cost, especially in recent ten years the fastest progress. Use life and drilling ratetwo characteristics can aim, they eventually determine bit affects the extentof the drilling cost. Improve the rate of penetration and to use life of thebit is an effective way to reduce drilling cost, there are data confirmed thatthe improvement of drilling rate than the bit life improvements to reducedrilling cost is bigger, the influence of high bit cutting structureimprovement is to improve the bit rate of penetration is the most direct way. For a long time, people to the cutting structure improvement first focused onthe main cutter structure, in terms of cemented carbide tooth structure, forexample, people have invented the wedge, shovel teeth, such as partialteaspoons of tooth, tooth wear, and so on.