New progressive methods include air-purged drilling. This method is fundamentally different from washing with a liquid in that a gaseous agent, in particular compressed air, is used to clean the bottom of the sludge. Drilling practice has proven that the use of compressed air as a cleaning agent provides a significant increase in the mechani- cal drilling speeds and reduces the time required to eliminate geological complications, due to which
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Kurbanov, M.A.; Alikulov, Sh.Sh.; Ganieva, D.S.; and Karimov, N.M.
"RESEARCHES IN THE FIELD OF TECHNOLOGY OF EXTRACTION CONCENTRATION OF RHENIUM FROM DESORBATES,"
Gorniy vestnik Uzbekistana: Vol. 2020
, Article 4.
Available at: https://uzjournals.edu.uz/gorvest/vol2020/iss2/4