Abstract: In order to meet the needs of the deep well and over depth well drilling, the new turbodrill research and testing processes are introduced in detail based on experimental investigation. The design of turbine cascade blade and flow-field analysis are conducted by using numerical fluid mechanics and computer simulation techniques. The turbine cascade with high efficient and low pressure drop is developed. The operating life of the developed cascade is increased greatly because of the application of new materials as well as technology for developing thrust bearing set. Meanwhile, the turbodrill structure and its technical characteristics are introduced. Compared with the same kind of foreign products, the cascade has a lot of advantages, for example, low pressure drop, long-life, non-rubber element, and is especially suitable for deep well and over depth well drilling etc. are emphasized according to the field test results. To settle existing problems in field operation, five suggestions are proposed in order to speed up the application of the turbodrilling technique.

Key words: turbodrill, design structure, test, technical economic potentialities, potentialities

摘要： 根据油田钻深井和超深井的需要,从试验研究出发,详细介绍了我国新型涡轮钻具的研制、试验过程.将计算流体力学及计算机仿真技术用于涡轮的流场分析和叶型设计,获得了高效并具有较低压降的涡轮叶栅,将新材料和新工艺应用于推力轴承组的研制,大幅度提高了涡轮钻具的行程工作寿命.新型涡轮钻具的结构和技术特性,与国外同类产品相比,在性能基本相同的情况下,具有压降较小、寿命长、无橡胶元件、更利于深井和超深井作业等优点.结合现场试验的成果,提出采用涡轮钻井的七大优点.针对现场使用中存在的问题,提出五点建议,以加快我国涡轮钻井技术的推广应用.

关键词: 涡轮钻具, 结构设计, 试验, 技术经济指标, 潜力