METHOD OF TEMPORARY ISOLATION OF RESERVOIR Russian patent published in 2008 - IPC E21B33/13 

FIELD: gas-and-oil producing industry.

SUBSTANCE: packer is constituted by inserting isolating material into bottomhole formation zone with following destruction and development of borehole cavity. Cement grout with sawdust wood filler is used as isolation material. Bridge made from the same isolating material is installed without pressure as a packer, in the gap of reservoir. Bridge is drilled out. Shield of layer of isolating material is left at internal walls of borehole cavity. Inner diameter of shield is more than external diameter of additional casing pipe which is inserted into borehole cavity with following cementation with backfill. Development of borehole cavity is performed after backfill is bound and additional casing pipe and backfill and isolating material in bottomhole formation zone and internal walls of borehole cavity are perforated.

EFFECT: increased efficacy of technique.

3 dwg