DEVICE FOR WELL DUAL-ZONE PRODUCTION Russian patent published in 2003 - IPC

FIELD: production of fluid minerals from two producing horizons, particularly, water-bearing ones by one well; applicable also in production of mineral waters, in oil and gas producing industry. SUBSTANCE: device includes two production strings located in each other in upper zone of well and forming production string of upper zone and production string of lower zone. Device is also provided with separating string, intermediate cementing tube, intermediate draining string and air tube. Separating string and intermediate cementing tube are communicated with well upper zone by intermediate draining string. Air tube is connected with intermediate draining string to form intermediate double airlift string communicated with operation string of lower zone. EFFECT: provided highly efficient production, reliable isolation and separation of two producing zones of well and monitoring in course of operation. 5 cl, 1 dwg