METHOD OF STABILIZATION OF BOTTOM-HOLE FORMATION ZONE Russian patent published in 2001 - IPC

FIELD: technique and technology of well remedial work, particularly, methods of formation of annular- space filter in producing formation of oil, water and gas wells. SUBSTANCE: method includes preparation of grouting mortar with acid-soluble filler, its injection and setting, drilling out, flushing of formed stone from salt. Acid-soluble filler is used in form of shell rock of 0.7-1.5-mm fraction in amount of 10-15 wt.%. Introduced additionally into grouting mortar is surfactant in amount of 0.5-1.0 wt.%. EFFECT: prevented clogging of bottom- hole zone due to injection of stable and plastic grouting mortar. 1 tbl