BOREHOLE PLANT FOR SIMULTANEOUS SEPARATE AND ALTERNATE OPERATION OF SEVERAL FORMATIONS BY SINGLE WELL Russian patent published in 2005 - IPC

FIELD: hydrocarbon (oil, gas, gas condensate, gas-hydrate or mixture) production and formation pressure maintaining means in multiplay fields and, particularly, for simultaneous separate, as well for periodical or successive operation of several production facilities (production formations or interlayers) by single (blower, gas-lift, beam, injection and so on) boreholes.

SUBSTANCE: plant comprises one or several pipe strings lowered and installed in borehole. At least one pipe string is provided with at least two devices, namely with packer and disconnector. The plant may be separated from packer and removed from the borehole after lowering and leak-proof fitting of at least one packer in pipe string. Then pipe string having lesser, equal or greater diameter and provided with one or several devices, namely packer, disconnector, may be lowered and installed in the borehole. The disconnector comprises two removable and fixed parts, one or several borehole chambers with releasable valves, telescopic connection and pump. Pipe string is lowered directly in the borehole or in pipe string having greater diameter or is connected in leak-proof manner but loosely with corresponding fixed packer through disconnector. Pipe string bottom below packer installed above or under lower formation is hydraulically isolated or connected with borehole bottom.

EFFECT: increased technological efficiency and plant reliability.

23 cl, 38 dwg