北卡尼梅赫铀矿床地浸采铀成建井工艺对比分析和发展建议OA

This paper provides a detailed and systematic analysis on the drilling equipment,drilling technology,well completion technology and organizational management system used by China National Nuclear Corporation(CNNC)Geological Exploration Group Co.,Ltd.and local Uzbek construction team in in-situ leaching well construction project of north Kanimekh uranium,as well as cost reduction and efficiency improvement achievements.The equipment used by Uzbek team is typically a two-vehicle setup of trailer-mounted drilling rigs and drill pipe trailers,employing a multi-stage natural sedimentation purification method for drilling mud and drilling pipes in 73 mm diameter with three-blade composite drilling bits,which is simple to match,easy to transport,and has a high drilling efficiency,but the accident rate is high.Chinese drilling rigs usually use drill pipes with a diameter of 89 mm and four blade wing composite drilling bits,which require more and heavier equipment,and are more difficult to relocate,but has high safety redundancy and better well completion quality.Based on the current status of in-situ leaching uranium well construction technology in China and Uzbekistan,as well as the technology application results in North Kanimekh uranium deposit over the past year,this paper proposes systematic development suggestions.The related process introduction and research are published for the first time and have not been widely applied in in-situ leaching uranium mines in our country.It has reference and inspiring significance for the development of in-situ leaching drilling technology equipment.