METHOD OF TEST OF PRODUCTION OF OIL WELL FITTED WITH WELL PUMP Russian patent published in 1994 - IPC

FIELD: oil production. SUBSTANCE: pressure is measured in injection and extraction lines of well. Pressure difference of these lines is found. Dependence of specified difference of pressures on time is determined. In compliance with it moments of start and finish of cycles of supply of working fluid in lines of injection and extraction and moments of start and finish of strokes of plunger group of well pump upwards and downwards and values of pressure and time are determined corresponding to specified moments of time. Then relation of time intervals and pressure increments accordingly from start of cycle of supply of working fluid into extraction line before start of downward stroke of plunger group and relation of time intervals and pressure increments accordingly from start of upward stroke of plunger group to its finish and from start of downward stroke of plunger group to its finish are determined. After this values of criterion of serviceability for different types of disturbances in well are found in accordance with formula and minimal value of criterion of serviceability is registered by which type of disturbance is determined. EFFECT: enhanced efficiency of determination of types of disturbance. 4 dwg