DEVICE FOR INDUCING INFLOW OF FORMATION FLUID Russian patent published in 1994 - IPC

FIELD: oil and gas production. SUBSTANCE: device is installed on tubing 1 and has body 2, jet pump and check valve. Body 2 is hollow structure in which channels are accommodated. Jet pump has sleeve 5 with recording instrument unit 6 to which end piece 7 with load-carrying logging cable 8, jet 9, mixing chamber 10, diffuser 11 and port are connected. Jet pump is lowered in body 2 on landing seat and tightness is ensured by seals 12. During operation jet pump is held by stops 18 and links 19 remove jet pump from stops. Check valve includes rod, spring and bushing to which instruments are connected such as bottom-hole pressure gage, thermometer, etc. There are holes and channels to equalize pressure in zones under and above packer when lifting jet pump. EFFECT: reduced terms of well completion, intensified oil and gas inflows, possibility of repeated exposure of formations by perforators run on cable through offered device. 4 dwg