METHOD FOR ELIMINATION OF CLAY-SALT PLUGS IN ANNULAR SPACE OF GAS WELLS WITH ABNORMAL LOW PRESSURES

摘要

A method for elimination of clay-salt plugs in annular space of gas wells with abnormal low pressures consists in that injection of washing liquid to annular space is carried out in pulse mode, and elimination of the plug is determined by change of pressure in the well annular space, wherein injection of washing liquid is performed at high rate in volume that is not smaller than the volume of the well annular space, with direct control of pressure in tube and annular spaces. at absence of pressure in the tube space of the well elimination of the plug is considered to be completed, after that the well is purged through a blowoff plug with carrying out works on its opening.