PACKER-TYPE DEVICE FOR SELECTIVE TESTING OF BEDS Russian patent published in 1998 - IPC

FIELD: drilling for oil, gas and water. SUBSTANCE: this is used for selective testing of beds in vertical, inclined and horizontal wells. Device has upper and lower packers with hydraulic sealing members. It is also provided with movable rods and hollow filter. Movable rods have axial passages. Hollow filter is installed between upper and lower packers. Installed in axial passage of movable rod of upper packer is non-return valve having bypass passage. Movable rod of lower packer is provided with dumb partition and by means of its upper part it creates chamber in lower packer. This chamber is connected with bypass passage of non-return valve by means of flexible connector located in filter spaces. EFFECT: high efficiency. 4 dwg