METHOD FOR PLACING CEMENT BRIDGING PLUGS IN WELLS AND DEVICE FOR ITS REALIZATION

摘要

FIELD: well drilling. SUBSTANCE: method for placing cement bridging plugs in wells includes forced removal of drilling mud from zone of placing cement bridging plug by swabbing with simultaneous cleaning of well walls from mud cake and injection of grouting mortar into formed zone of drilling mud separation. Well is swabbed by self-sealing collar which is fastened to circular piston in the lower part of bailer by means of releasable connection. EFFECT: higher strength and sealing of installed bridging plugs in oil and gas wells. 2 cl, 2 dwg