METHOD FOR CREATION OF GRAVEL FILTER IN WELL Russian patent published in 2000 - IPC

FIELD: mining industry. SUBSTANCE: method particularly relates to gas and oil production industry and can be used at completion of wells in course of drilling or in repair of wells for fighting sloughing of sand from loose-cemented or non-cemented productive beds. According to method, lowered into well by pump-compressor pipes is filter. Gas is recovered from bed through filter and pump-compressor pipes and gravel is delivered through annular space in medium fluid. At completion of well, used in function of fluid for delivery of gravel is gas condensate with concentration of gravel from 150 to 300 kg/cu.m. Gas condensate is injected into filter zone before delivery of gravel into filter zone and after delivery of gravel. Gravel is delivered into well at bottom-hole pressure being below bed pressure. Application of aforesaid method enhances efficiency of its use especially at low temperatures without increasing capital expenses for additional equipment. EFFECT: higher efficiency. 1 cl, 2 dwg