SYSTEM AND PROCEDURE FOR BOREHOLE OF WELL PERFORATION Russian patent published in 2011 - IPC E21B43/11 E21B34/10 

FIELD: oil and gas production.

SUBSTANCE: system for borehole of well perforation consists of string of firing guns including big internal flowing channel, packer positioned on said string for control of flow between internal and external space of string through at least radial orifice passing through wall of string and containing valve regulated with activation device. The activation device reacts to a signal of pressure and time and has an electron module for detection of input pulses of pressure and moments of time of their occurring for comparison with a preliminary programmed characteristic. The activation device reacts through selective control of an activation valve opening for activation of the valve with hydrostatic pressure in the borehole of well. The valve system is installed in a case of the said string so, that it is located outside a big internal channel of the string at transition between open and closed states. The activation device is located in a slot on external surface of the said case for maintaining big internal flowing channel of the string. The procedure for the borehole of the well perforation consists in the following stages: connection of the string of firing guns to the valve system, valve system positioning in the case of the said string, transfer of the said string and valve system into a desired place in the borehole of the well, determination of a preset characteristic of input pulses of pressure and moments of time of their occurrence; actuation of the valve system after determination of the said preliminary specified characteristic.

EFFECT: improved control of fluid medium flow and pressure in well.

13 cl, 8 dwg