METHOD OF REDUCING SAND PRODUCTION OF OIL WELLS Russian patent published in 2016 - IPC E21B37/00 E21B43/04 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used in oil production with sand production in production wells. Method involves well killing. Downhole equipment is removed. Equipment assembly is lowered with "root" on tubing string to sand plug. Sand plug is washed. Tubing string with "root" is removed. Tubing string is lowered into well and packer-plug is installed at depth of 1-2 m below oil-saturated formation interval. Tubing string is disconnected from packer-plug. Tubing string is withdrawn from well. Perforated tubing string of smaller diameter having in its upper part an upper packer is lowered until it rests against packer-plug. Upper packer is unpacked. Flexible pipe is lowered into inner cavity of perforated tubing string. Proppant is pumped through flexible pipe with polymer composition into perforated tubing string by its pressing into annular space between casing and perforated string. Well is held time and cross-linking of proppant is provided. Then well is developed and brought out to operating mode.

EFFECT: technical result is reduction of sand production of oil wells due to creation of downhole anti-sand filter.

1 cl, 3 dwg