Improvement of maintenance and repair work on technological wells in the conditions of the “North and South Karamurun” deposit, Kazakhstan

Abstract

In the complex and constantly changing area of uranium mining, the Republic of Kazakhstan is a world leader. Colmatation deposits adjacent to filters cause wells to lose efficiency over time, so periodic maintenance and repair are required to solve these problems. Our research aims to identify the most effective ways to improve well productivity with the development of science-based recommendations to help plan work in the conditions of the “North and South Karamurun” uranium field, Kazakhstan. The study involved observation, analysis, comparison, and synthesis. The processes of different types of repair and restoration work at the deposits were monitored, and the results obtained were analysed and compared, to determine which were the most effective. Units such as the XRVS Airlift Pumping unit, Wellbore pneumatic wellbore drilling unit, Mobile ammonium bifluoride chemical treatment unit, BA-15V drilling units, and 3A3 prospective drilling unit were analysed. Recommendations for enhancing pumping technology or replacing components were developed for each unit. Extending XRVS airlift pumping duration enhanced efficiency by 40% and improved reliability and radiation safety. Installing a pump with a capacity of 30 m³/hour or higher for the mobile wellbore washing unit helped handle heavy sand fractions effectively.