DEVICE FOR REMOVAL OF FLUID FROM BOTTOM HOLE OF GAS WELL Russian patent published in 2002 - IPC

FIELD: gas producing industry; applicable in removal of formation fluid from bottom holes of gas and gas-condensate wells. SUBSTANCE: installed in hollow cylindrical body with axial channel is lower supporting surface which has limiter, hollow rod loaded by spring relative to limiter to form circular gap between them. Installed in axial channel of hollow rod is ball check valve which consists of seat and ball. Rigidly secured to hollow rod is surface valve resting on limiter. Diffuser is installed on lower end of hollow rod, above lower supporting surface, to form gap between them. Diffuser has conical axial channel and tangential channels in lower part. Diffuser upper part has perforated partition. Diffuser together with device body forms circular chamber hydraulically communicated by perforation holes with axial channel. Tangential channels hydraulically communicate circular channel with conical axial channel. Upper supporting surface is spring-loaded with respect to device body. Installed into tubing string of operating well through lubricator is rated number of devices. They are installed in joints. EFFECT: higher efficiency of operation. 4 dwg