INFORMATION AND MEASURING SYSTEM FOR GAS-FLUID FLOW PHASE RATE Russian patent published in 2010 - IPC E21B47/10 G01F1/74 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used for measuring the rate of two-phase flows of operated gas, gas condensate and oil wells. Proposed system comprises gas-fluid flow pressure fluctuation transducer with its output connected to charge amplifier. Charge amplifier output is connected to input of the first and second scaling measuring amplifiers, for LH and HF pressure fluctuations, the amplifiers outputs being connected to inputs of the first and second active bandpass filters, respectively. Outputs of the first and second active bandpass filters are connected to first data inputs of the first and second ADCs.Outputs of the first and second ADC are connected to first data inputs of the units designed to determine data-containing HF flow parameters and data-containing LF flow parameters. Their control outputs are connected to second control inputs of the first and second ADCs. Note here that aforesaid unit designed to determine data-containing LF flow parameters is connected, via third data input and third control output, with the third ADC output and first control input. Second data input of third ADC is connected to analog multiplexer output. First, second data and third control inputs of said multiplexer are connected, respectively, with flow temperature and pressure transducers and fourth control output of the unit designed to determine data-containing LF flow parameters. Note also that second data outputs of the units designed to determine data-containing HF and LF flow parameters are connected to data inputs of the unit designed to generate the vector of input variable neuron networks models. First and second control outputs of unit designed to generate the vector of input variable neuron networks models are connected to second control inputs of the units designed to determine data-containing HF and LF flow parameters, while its third data input is connected to inputs of the units of neuron network gas and fluid flow rate models. Outputs of the units of neuron network gas and fluid flow rate models are connected, respectively, to first and second inputs of indication unit and to first and second inputs of communication interface unit.

EFFECT: higher accuracy of separate determination of gas and fluid phases due to possibility to determine unlimited number of frequency bands in flow pressure fluctuation spectrum in wide frequency range.

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