METHOD OF CORRECTION OF INTERSTRING GAS MANIFESTATIONS IN WELL Russian patent published in 2000 - IPC

FIELD: gas production, specifically, operation of gas and gas condensate wells. SUBSTANCE: objective of invention consists in increased efficiency and prolonged duration of effect of sealing of loose joints of operational string and passages in cement stone while correcting interstring and string gas manifestations by way of rise of effective viscosity, structural-mechanical properties and stability of sealing solution pumped into hole clearance ( space above packer ). Method of correction of interstring gas manifestations in well includes pumping of high-viscosity mixture into hole clearance. Two compositions as minimum forming high-viscosity dispersive system in process mixing and moving through hole clearance are pumped simultaneously. Composition 1, per cent by mass: includes: sludge of production of sulfonate additives to lubricating oils 47.0-52.5; synthetic fatty acids 1.0-1.5; used oil products 1.0-2.0; aqueous solution of calcium chloride (oversaturated, density 1400- 1450 kg/cu.m ) 45.0-50.0. Composition 2, per cent by mass: sodium sulfate 10.0-18.0; sodium carbonate 14.0-18.0; bentonite clay 10.0-14.0; water being the balance. Compositions are prepared separately but are pumped into well simultaneously in proportion 1:1. EFFECT: increased efficiency and prolonged duration of effect of sealing of loose joints of operational strings and passages. 2 dwg, 2 tbl