FIELD: mining.
SUBSTANCE: circulation method of fluid medium in system of wells involves drilling of the first well from surface to underground zone, drilling of the second well from surface to underground zone; at that, the second well crosses the first well at connection point near underground zone, drilling of drain hole from connection point to underground zone by using drill pipes passing through the second well, pumping of drill fluid through drill pipes during drain hole making; at that, drill fluid leaves drill pipes near drill bit of drill pipe, supply of hydraulic fluid downwards via the first well through pipeline; at that, pipeline has hole made at connection point so that fluid leaves the pipeline at connection point and in which fluid mixture is returned upwards via the first well outside the pipeline; at that, fluid mixture includes drill fluid after the latter leaves the drill pipes.
EFFECT: increasing safety of drilling system
56 cl, 5 dwg
