METHOD OF FORMATION OF INTERSTRATAL ISOLATION BRIDGING PLUGS IN WELL ANNULAR SPACE Russian patent published in 2003 - IPC

FIELD: mining, particularly, methods of action on plugging mortar technical state in well annular space. SUBSTANCE: method includes injection of plugging mortar into annular space of well. Plugging mortar is treated with pulsing pressure and temperature with discrete burning of powder generators. Time lag between powder generator burnings is 15 min. Heating is effected at initial induction period of plugging mortar setting with exceeding the background values by 10-230 C. Time of heating is determined by intensity of heat liberation in selection of plugging mortar composition. EFFECT: higher efficiency of isolation of annular space due to accelerated formation of isolating bridging plugs from plugging mortar by covering entire cross-section of annular space during induction period before beginning of setting of main mass of plugging mortar. 3 dwg