射流对提高的钻速、改善钻井作业经济性方面的重大作用普遍受到重视。采用喷射式钻头便是显著的例证。随对射流清洗井底和辅助破岩机理的认识不断深化,射流在井底的新型配置方案和新型射流喷嘴陆续开发了出来。若新型射流喷嘴最终能在井内实用化。继喷射钻井之后,深井钻速将再次上一个台阶。 The significant role of jets in improving the rate of penetration and improving the economics of drilling operations is of general importance. The use of jet drills is a notable example. With the deepening understanding of jet cleaning bottomhole and ancillary rock breaking mechanism, a new configuration of jet at the bottom of the well and a new jet nozzle were developed one after another. If the new jet nozzle eventually can be practical in the well. Following the jet drilling, deep well drilling will once again take the next step.