PROCEDURE FOR COMPLETION WITH HYDRO-FRAC IN MULTITUDE OF PRODUCING INTERVALS (VERSIONS) Russian patent published in 2011 - IPC E21B43/26 

FIELD: oil and gas production.

SUBSTANCE: procedure consists in following stages: in lowering disconnecting column into borehole, also, drill column contains one or several couplings, one or several couplings wrapped with filter and multitude of swelling packers arranged around shank end at specified distance; and in swelling at least one of swelling packers to disconnect zones of one or several chosen intervals. Also, one or several couplings wrapped with filter and one or several couplings are arranged around the shank end at specified distance from each other for placement at least one or several couplings wrapped with filter and at least one or several couplings in one or several chosen intervals. Inside the shank end there is installed a shifter. The shifter controls positioning one or several couplings and one or several couplings wrapped with filter. The actuated shifter drives one or several couplings into an open position to intensify inflow from at least one or several chosen intervals, when fluid medium is supplied via one or several orifices of the shank end and to one or several orifices in one or several couplings. Additionally, the shifter is actuated to drive one or several couplings into a closed position to a repeated disconnection of zones of at least one or several chosen intervals. Further, the shifter is actuated to drive one or several couplings wrapped with filter in an open position to facilitate flow of produced fluid from at least one or several chosen intervals via at least one or several orifices in the shank end and via multitude orifices in at least one or several couplings wrapped with filter.

EFFECT: raised efficiency of procedure.

11 cl, 29 dwg