METHOD OF CONTROL OF INTERSTRING AND ANNULUS CROSS-FLOWS OF GAS IN WELLS (VERSIONS) Russian patent published in 2003 - IPC

FIELD: gas producing industry; technology and materials applicable in control of interstring and annulus cross-flows of gas in wells of gas underground storage. SUBSTANCE: method includes well logging, string perforation and injection under pressure to defect zone of sealing composition containing powdery bentonite clay and additional nonionic surfactant in form of phospholipin concentrate, and rheology structurizer in form of activated carbon in the following amounts, wt.%: said bentonite clay 50.0; phospholipin concentrate 47.0; activated carbon 3.0. Sealing composition is injected to defect zone in liquid and hot (up to 85C) state. According to other version of claimed method, it includes well logging, string perforation and injection under pressure to defect zone of sealing composition containing bentonite clay, additional nonionic surfactant in form of phospholipin concentrate, rheology structurizer in form of activated carbon and regulator of thermal stability in form of copper dioleostearate, with the following amounts of components, wt.%: bentonite clay 40.0; phospholipin concentrate 55.0; activated carbon 2.0; copper dioleostearate 3.0. Sealing composition is injected to defect zone in liquid and hot (within 85C) state. EFFECT: prolonged term of stability, higher adhesion of sealing composition resulting in increase of overhaul period. 2 cl