METHOD FOR DRILLING-IN Russian patent published in 1994 - IPC

FIELD: gas and oil producing industry. SUBSTANCE: casing string is added with filter within the interval of producing formation. Filter holes are closed with acid-disintegrated plugs. Arranged in casing-borehole annulus against filter is grouting material in form of cement mortar with polyvinyl chloride in the amount of 10-20% of cement mass. After cement setting, polyvinyl chloride is subjected to thermal disintegration. EFFECT: increased efficiency of formation of permeable stone in filter zone, reduced material expenditures, and decreased corrosion of well equipment. 3 dwg, 1 tbl