FACILITY FOR HYDRODYNAMIC CASED WELL LOGGING Russian patent published in 2003 - IPC

FIELD: production oil, study of hydrodynamic characteristics of beds in oil wells. SUBSTANCE: facility includes cylindrical body with hole for entry of opposite flow of well fluid. Body houses inlet and outlet chambers linked by branch pipe which diameter is substantially smaller than diameter of hole for entry of well fluid. Branch pipe has conical flares on ends and lower end of branch pipe is fitted with nozzle which orifice narrows in direction from top to bottom and outlet chamber is connected hydrodynamically through insulated hydraulic communication channels to area between wall of well and body. Part of this area located opposite to body is insulated from the rest of well by sealing members arranged along generating line of body. Insulated area between wall of well and body and space inside branch pipe communicate through insulated hydraulic communication channels with manometers recording changes of pressure near wall of well and inside branch pipe. EFFECT: increased efficiency of isolation of permeable beds and enhanced precision of determination of their hydrodynamic characteristics. 1 dwg