DEVICE FOR DETERMINATION OF WELL PRODUCTION RATE Russian patent published in 1996 - IPC

FIELD: oil production. SUBSTANCE: device for determination of well production rate has electric motor 1 with pump whose phase is connected through current and voltage transformers 16 and 17 with power converter 18. Device also has unit 19 for power compensation of idle stroke, unit 20 for compensation of losses in power cable, multiplying member 21, unit 22 for consideration of pressure losses, power supply and control unit 23, pressure loss summation unit 24, wellhead pressure pickup 25, amplifiers 26 and 36, compensation unit 27, scale setting unit 28, pulse shapers 29 and 33, pulse counter 30, unit 31 for setting timer, timer 32 root extracting element 35. Pump shaft power is determined by converter 18. Substracted from this value are powers of idle stroke and cable losses. Well production rate is determined by pump Certificate characteristics reflecting variation of value of consumed power unit for creation of head unit, and by formulas given in the invention description with due consideration of losses for fluid lifting. Algorithm of treatment is realized in units 19-26, 35 and 36. EFFECT: higher efficiency. 3 dwg