为了解国外岩心钻探动态,现介绍部分有关情况,供参考。一、瑞典瑞典是世界上开展金刚石钻进较早的一个国家,已有百余年的历史。现采用金刚石的钻进工作量,约占90%以上。基本是以孕镶金刚石钻头钻进为主。据1972年资料介绍,孕镶金刚石钻头的平均寿命为60～80米,表镶金刚石钻头的一次镶焊平均寿命为20～25米,扩孔器 In order to understand the overseas drilling dynamics, we will introduce some relevant information for reference. First, Sweden Sweden is the world’s diamond drilling earlier in a country, has a history of more than 100 years. Diamond drilling workload is now used, accounting for more than 90%. Basically, pregnant diamond inserts drill into the main. According to the information in 1972, the average life expectancy of impregnated diamond drill is 60 ~ 80 meters. The average life span of a diamond insert with a diamond insert is 20 ~ 25 meters. The reamer