FIELD: downhole works.
SUBSTANCE: group of inventions relates to a downhole tool lowered on a cable for downhole works, a downhole system with such a tool, a method for downhole works for penetration to a well by means of such a tool, and to the use of such a tool. The downhole tool lowered on a cable for downhole works contains: a cable; a downhole engine powered by means of the cable; a downhole injection pump directly or indirectly actuated with the engine for supply of a fluid flow; a decompression cylinder decompressed by means of fluid supplied with the injection pump; a flow control device; a hydraulic pump actuated with the engine for actuation of the injection pump. The flow control device contains an inlet, a piston, and a discharge channel connected with the possibility of transfer of fluid to the well. The piston is made with the possibility of movement between the first position, in which the discharge channel is connected with the possibility of transfer of fluid to the decompression cylinder to provide deflation of the cylinder, and the second position, in which the discharge channel is isolated without the possibility of transfer of fluid from the decompression cylinder for decompression of the decompression cylinder.
EFFECT: increase in the efficiency of operation of decompression elements of a downhole tool.
15 cl, 6 dwg
