METHOD AND DEVICE FOR INJECTING PROCESS FLUID MEDIUM INTO WELL Russian patent published in 2009 - IPC E21B34/10 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to method and system of injecting process fluid medium into well. According to the invention the well is equipped with safety valve controlled from land surface. The valve is controlled by alteration of pressure in the valve control pipeline. Also process fluid medium is pumped into the well so that the flow runs through the valve control pipeline. There is provided running the flow from the valve to a well head and to the aperture of process fluid supply into the well. The system consists of a pipeline connected to the valve control pipeline and containing at least one aperture for process medium supply and one back valve which prevents flow of bed mediums from each aperture for supply of process medium via the pipeline supplying process medium into the valve control pipeline. Also the pipeline supplying process medium is installed at the section of the well below the safety valve so, that at least one aperture for process medium supply is located below the safety valve.

EFFECT: increase efficiency of method and reliability of system for well development.

19 cl, 1 tbl, 1 dwg