METHOD FOR TESTING BEDS IN WELL DRILLING Russian patent published in 1995 - IPC

FIELD: mining industry. SUBSTANCE: to speed up the comparison of results of quick testing with results of trial operation and estimation of effectiveness of water shutoff work, beds are opened by drilling with use of polymer mud without solid phase, water shutoff is effected by injection of polymer mud into bed at excessive pressure up to 10 MPa for an hour, and quick test is carried out for 2-3 h before and after the shutoff work. Trial operation is carried out for 1-2 days by moving tool with packer. EFFECT: higher efficiency.