牙轮钻头的发展历史与展望

综观牙轮钻头在各个时期的发展情况可知,牙轮钻头齿和轴承的不断改进,使钻头的使用寿命、单只进尺和钻速不断提高。实践表明,硬质合金镶齿、密封润滑、滑动轴承和高速喷射组合的“四合一”钻头,在目前的牙轮钻头中占主导地位。作者指出:今后牙轮钻头研究工作的重点是提高钻头的钻速。为此,应优化牙轮齿形和布齿方案,挖掘水力系统的潜力,改进轴承结构和提高钻头零件的机械设计技术。

History and Future of Roller Bits

The history of roller bits shows that the service life.footage per bit and drilling rate of the bit have been increasing all the time with successive improvement on both the cutter teeth and the bearings of the bit. Practice shows that the so called "four-in-one" bits characterized by carbide insert, sealed lubrication, sliding bearing and high speed jet, are playing the leading role at present. The author indicates that, from now on, the stress of bit study should be put on increasing further the drilling rate of the bit, and so it is required to optimize the profiles and distribution of the cutter teeth on the bit. bring the hydraulic system into full play, and modify further the bearing structure.