RU1818538C - Method for determination of specific usage of one component of two-component mixture - Google Patents

Abstract

Usage: when measuring the components of a water-oil mixture in the process of researching oil wells. The inventive device for determining the specific consumption of a component of a two-phase mixture contains one Converter total flow 1, one Converter composition 2, two analog-to-digital converters 3.4, one reprogrammable memory 5, one information register 6, one decoder 7, one indicator 8 and control unit 9.2 ill.

Description

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The invention relates to the field of measuring the specific flow rate of mixtures and can be used to measure the components of a water-oil mixture in an oil well survey process.

The purpose of the invention is to improve the accuracy of measurements by eliminating the influence of errors in determining the separate conversion functions of the total flow rate and composition.

In FIG. 1 is a structural diagram of a device.

The device comprises a total flow converter 1 and a converter composition 2, including each sensor and an electric converter (not shown in FIG.), First 3 and second 4 information converters into a digital code, a programmable memory device (EPROM 5), information register b, decoder 7 with indicator 8, control unit.

The control unit 9 includes a programmable timer counter 10, the first 11 and second 12 of the RS flip-flop, a trailing edge formation circuit 13, a first 14 and a second 15 delay circuit.

The first and second outputs of the timer 10 are connected to the first inputs, respectively, of the triggers 11 and 12. The outputs 11 and 12 of the triggers are connected to the control inputs of the start of the corresponding information converters 3 and 4 in digital code, The outputs of the converters 1 and 2 are connected to the information inputs of the corresponding converters 3 and 4. The information outputs of converters 3 and 4 are combined and connected to the corresponding bit group of the address of the ROM 5, the output of which is connected through register 6 to the decoder 7 with indicator 8. To the output of one of the RS-tr iggers, which controls the start of the information converter into the digital code with the longest conversion time interval (e.g., trigger 12), the input of the trailing edge formation circuit 13, the output of which is connected to the read control input of the ROM 5, is connected to the write input of the register b; x to the reset input of timer 10 and to the input of the delay circuit 14. The output of the latter is connected to the control input of the reset to the initial state of the converters 3 and 4 and to the input of the delay circuit 15, the output of which is connected to the second inputs of the triggers 11 and 12 and the trigger input of the timer.

The device operates as follows. Before starting work, discrete data on the specific consumption of component j in the measurement ranges of the total consumption and composition variation in increments providing the established measurement accuracy are stored in the memory cells of the EEPROM 5. In this case, the bits of the address of the ROM 5

divided into two groups, in each of which the information outputs of the first 3 and second 4 information converters of information into a digital code are connected. (Each set of numerical values of the total

flow rate and composition in the form of an address digital code corresponds to the value of the specific flow rate of the component of the two-phase mixture embedded in the corresponding memory cell of the PROM 5).

When a signal CI appears (see Fig. 2) from the output of the first delay circuit 14 or from a triggering device, for example, waiting for a single vibrator (not shown in Fig.), Generating a pulse after switching on

the device’s power supply, the converters 3 and 4 are reset to the initial state, in which the converters are ready for the start of the operation cycle, while signal C is fed to the input of the first circuit

delay 15, from the output of which signal C2 allows the positive voltages Ui and Ua to be installed at the outputs of the RS flip-flops 11 and 12, the leading edges of which trigger information converters into digital codes 3 and 4.

At the same time, signal C2 starts a half-time, and 10, which forms two time intervals ti and ta.

After each time interval (counting) ti and ta, the outputs of timer 10 generate control signals C3 and C4, which switch triggers 11 and 12

 to the initial state (Ui and Ua), while the information processing cycle (pulse counting) by the converters 3 and 4 stops along the trailing edge of the voltages Ui and Ua. At the same time, the trailing edge formation circuit 13 is connected to the output of the trigger 12, with the longest voltage pulse, Da generates a signal

 C5, which gives permission to read information from EEPROM 5 to the address set at the outputs of converters 3 and 4, and also gives permission to write information from the output of EEPROM 5 by register 6 and resets the timer-counter 10 to its original state. At the same time, signal C5 is input to the delay delay circuit 14, at the output of which signal CI is generated. Next, the cycle repeats.

Technologically, converters 3 and 4 of information into a digital code can be made both in the form of analog-to-digital converters, and all in the form of binary

counters. Also, the control unit 9 can

be performed according to other structural schemes, for example, according to a scheme where the signals from the converters 1, 2 arrive on the same communication line, alternately switched.

The technical advantage of the proposed measurement method and the device for its implementation compared to the prototype is that the measurement accuracy is improved by eliminating errors in determining the separate conversion functions of the total flow rate and composition and calculating the value of the specific flow rate of the component. Formula A is a device for determining the specific consumption of a component of a two-phase mixture, comprising the first and second converters, a control unit, a code-code converter and an indicator, characterized in that, in order to increase accuracy, the first and second signal converters are additionally introduced into it a digital code connected by analog inputs to the outputs of the first and second converters, respectively, made in the form of a flow transducer and a mixture composition transducer, and connected in series to istr and decoder,

connected by the outputs to the inputs of the indicator, while the outputs of the first and second signal converters into digital code are connected respectively to the first and second groups of inputs of the code converter, made in the form

reprogrammable storage device connected by outputs to in. formation inputs of the register,

connected by a clock input to an input

enable the code-code converter and connected to the first output of the control unit, the second and third outputs of which are connected respectively to the first and second control inputs of the first signal converter into a digital code, the fourth and fifth outputs of the control unit are connected, respectively, to the first and second control inputs a second signal to digital code converter.