关键词: 涡轮钻具, 结构设计, 试验, 技术经济指标, 潜力

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