FIELD: gas and oil production.
SUBSTANCE: device consists of tubular system of transportation containing electrical cable and source of drill agent. When drill agent is pumped from surface downward and inside a pipe system, this source can be returned to surface through circular space between an external side of the pipe system and a borehole of the well. The device also consists of a drill system including a pump operated by electric power and a drill engine. The pump pumps out drill agent from the borehole of the well outside the drill system upward along an internal side of the drill system. A connector joins the drill system with the pipe system of transportation. The pump and the engine are communicated with an electric cable by means of the connector. A deflector deflects a descending flow inside the pipe system of transportation into circular space and deflects an ascending flow inside the drill system into circular space.
EFFECT: raised efficiency of well cleaning.
25 cl, 4 dwg
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