Drilling of Wells for the Extraction of Precious Metals in the Polymetallic Deposit of Bolnisi Municipality

Abstract

Wells for the extraction of precious metals at the poly deposit of Bolnisi municipality are drilled with EPIROC Christensen 140 Crawler Tier III and Atlas Copco Christensen CS 140 drilling rigs. In order to reduce the time required for lowering and removing the drill pipes and to remove the core qualitatively, without loss, and quickly, the Canadian detachable coring gun is used. Drilling wells is produced with CR-650 polymer powder (polyacrylamide) based drilling polymer solution, which, along with the removal of the drilled rock particles, lubricates and cools the drilling tools, and also prevents muds from hardening and, therefore, narrowing of the wellbore and jamming of the drill pipes. When drilling a well in fractured rock, a buffer solution is used to prevent absorption of the drilling fluid. The use of the above-mentioned modern methods has significantly improved the working time balance and technical-economic indicators of drilling.