CONSTRUCTION FINISHING METHOD FOR HORIZONTAL STEAM INJECTOR Russian patent published in 2014 - IPC E21B43/02 

FIELD: oil and gas industry.

SUBSTANCE: in drilling, seepage-volume characteristics of the bed and their alteration over the borehole are defined, the borehole is divided into zones that differ in said characteristics by 1.5-1.6 times to select the filter performance separately for each zone and quantity of holes. In the filter openings under the plugs mesh filtering elements are installed, the production string is run in with the filter equipped with the behind-the-casing oil-swellable packers, which are set at boundaries of the areas with different seepage-volume characteristics. The production string is set up, the coil tubing is run in up to the well bottom, then it is transferred from the well bottom to the head with simultaneous pumping of polyacrylamide-based gel through it thus pouring the lower perimeter of the filter. When gel coagulation time is over the chemical reagent is injected through the coil tubing to the upper perimeter of the filter, the well is hold for the time of the plugs destruction in the filter openings in the upper perimeter of the filter, then reaction products are washed out.

EFFECT: improving quality of the stratum penetration, efficient impact of the working agent on the deposit.

3 dwg, 1 tbl