WELL SYSTEM REMOVED FOR SIMULTANEOUS SEPARATE AND ALTERNATE OPERATION OF SEVERAL PRODUCTIVE FORMATIONS Russian patent published in 2010 - IPC E21B43/14 E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: system includes casing string the tightness of the walls of which is interrupted with the holes made in cross sections with productive formations - interlayers, packers, each of which is equipped with tubular housing with sealing element concentrically fixed on it and attached to the packer, together with which it restricts one of the perforated sections of casing pipe, pipe string and drive shutoff devices connected by means of it to the ground surface, each of which is located opposite one of perforated sections of casing pipe, includes tubular housing fixed on the latter and equipped with radial holes, inside tubular housing there concentrically installed is tube valve in the form of tubular element with ring-shaped sealing elements concentrically fixed on it, and actuator of volumetric action, which is connected by means of tubular control line to a ground pressure monitoring and control unit. At that, sealing elements of tube valve of each drive shutoff device have the form of the above pair of packers, and their housings are tightly attached to each other by means of the above tubular element. At that, each packer is equipped with inflatable sealing element which is connected through the appropriate control line as the above actuator of volumetric action to the appropriate pressure monitoring and control unit. Tubular housing has the form of the section of casing string, which is located opposite the appropriate valve and restricted as to height with walls and tightness of walls of which is interrupted at least with the holes made in them due to corrosion or accident.

EFFECT: simplifying and enlarging the application field of well system for simultaneous separate and alternate operation of several productive formations.

18 cl, 31 dwg