The method of determining the level of the lower boundary layer of the emulsion produced water in oil dehydrator
(57) Abstract:The inventive method is that identical converters remove signals at three different depths, and the level is determined by comparison of RMS values of the frequencies obtained at different depths. 2 Il. The invention relates to the preparation of oil and is intended for use in the process of dehydration.The closest set of features of the claimed method is a method of determining the boundary between the two liquids with different electrical properties (electrical impedance)  Method is to dive two identical probes (transducers) in the test environment so that these probes were located at different depths, obtaining difference signals with probes and bearing measurement information from the local areas studied medium. If both probes are in contact with the same fluid, the differential signal will be zero, if different fluids having different electrical properties (electrical impedance), the differential signal will not be equal to zero.Prototype method, keta, forming a boundary, constant in its entirety.The inventive method allows to obtain a higher technical result to determine the boundary between the two types of the same oil emulsion: emulsion formation water in oil emulsion of oil in produced water, as well as between the emulsion produced water in oil and formation water. In each of the emulsions there is a vertical concentration gradient and, hence, the vertical gradient of the dielectric constant, conductivity, and electrical impedance.Achieved results allow to determine the level of the lower boundary layer of the emulsion produced water in oil dehydrator.Higher technical result is achieved by the fact that just as in the prototype by using identical transducers receive signals at two depths in the studied environment and compare them, but, unlike the prototype, identical transducers made in the form of isolated dielectric cylindrical electrode connected in an oscillatory circuit of the oscillator, the frequency of which is an output signal of the measuring transducer, at the same time DOUT RMS frequency received on the lower and middle, and upper and middle depths.According to the static characteristic of the measuring transducer (Fig. 1), the frequency of the oscillator depends on the type of emulsion, the volume concentration of water in the emulsion produced water in oil and so will vary slightly when changing the volume concentration in the emulsion of oil in produced water, including 100% (produced water) that these changes in practice can be neglected.Disclosure of the nature of the proposed method provide a brief description of physical processes in the tank dehydrator.In the tank, dehydrator, which served a watered oil, under the action of natural forces (gravity and buoyancy) and artificial influence (electric field, chemical reagents) is the process of breaking of the emulsion and separation of its components. But full delamination does not occur, there is a concentration gradient. In oil emulsions when reaching a certain concentration of the dispersed phase happens change the type of emulsion (treatment phase). Usually in the emulsion of oil in produced water stratification process proceeds quickly, and at a shallow depth from the Neue what is a stationary ergodic random process, it is therefore necessary to compare the RMS values of the frequencies.If the RMS value of the frequency obtained for the lower and middle depths, almost equal, and the middle and top are different, the lower bound of the emulsion produced water in the oil is between the upper and middle depths. The equality of the signals from three depths shows that this boundary is above the upper depth. Inequality of all three signals indicates that this boundary is somewhere below the average depth.In Fig. 1 shows a graph of the dependence of the mean square value of the frequency of the measuring transducer from the volume concentration of water in the emulsions of both types (static characteristic of the transducer), and Fig. 2 shows a functional block diagram of a level switch to the lower boundary layer of the emulsion produced water in oil dehydrator.The ability of the proposed method is confirmed by its implementation in the device level switch in the bottom boundary layer of the emulsion produced water in oil in a horizontal metal tank dehydrator with a diameter of 3 mThe middle point (hole) is located at a height of 1/3 of Jindrisska electrode, isolated by a dielectric, a length of 200-300 mm, diameter 10-15 mm, is installed through holes horizontally within the tank. Tightness is ensured by performing a housing in which is mounted a cylindrical electrode.Cylindrical electrodes insulated by the dielectric 1-3, connected to the oscillating circuit of the corresponding oscillator 4-6, each of which is connected with unit RMS frequency block C. K. Z.) 7-9. The output of block C. K. C. 7 is connected to one of inputs of the block 10 of comparison, a second input connected to the output of block C. K. C. 8. The output of block C. K. C. 8 is connected with one input unit 11 of the comparison, a second input connected to the output of block C. K. C. 9. The units of comparison are the indication of the results of the comparison.The metal wall of the tank serves as the electrode and forms with each cylindrical electrode insulated by a dielectric 1-3, electric capacity, which is included in the oscillatory circuit of the corresponding oscillator. Changing the dielectric constant of the medium in the interelectrode space changes the capacitance and hence the frequency of the oscillator, which is the output value of the measuring prenebrezhimo low sensitivity to volumetric water content in the emulsion of oil in water reservoir eliminates the influence of the concentration gradient in it and identify with it produced water. A significant difference in the values of the frequencies for the different types of emulsions allows you to identify the boundary of the emulsion produced water in oil and oil emulsion formation water or brine water.Receive operation the RMS values of frequencies and comparing them in the given order are implemented on the basis of computer technology and inpatient programs. The comparison operation can be performed as subtraction and division. The METHOD of DETERMINING the level of the LOWER BOUNDARY LAYER of the EMULSION PRODUCED WATER IN OIL DEHYDRATOR, namely, that with identical transducers located at two depths in the studied environment, remove signals, and compare them to results of the comparison determine the desired value, characterized in that identical transducers made in the form of isolated dielectric cylindrical electrode connected in an oscillatory circuit of the oscillator, the frequency of which is an output signal of the measuring transducer, at the same time additionally remove the signal from the transducer located at a third depth, and compare the RMS values of the frequencies obtained at different depths of the
FIELD: measurement technology; high-accuracy determination of liquefied gas mass in reservoir irrespective of its phase.
SUBSTANCE: three RF sensors of different length are placed in reservoir filled with liquefied gas. Sensors are connected to secondary converter. Length of first sensor vertically placed in reservoir corresponds to height of reservoir. Length of second vertical sensor is reduced from below by value no more than 0.35 of length of first sensor. Third sensor is located in gas phase of liquefied gas and its length is no more than 0.3 of length of first sensor. Each sensor may be connected to frequency-setting circuit of respective self-excited oscillator.
EFFECT: enhanced measurement accuracy; extended field of application.
2 cl, 3 dwg
FIELD: measuring engineering.
SUBSTANCE: water level alarm comprises the section of coaxial long line provided with inner conductor projecting beyond its end. The section is connected with the high-frequency generator and recorder. The generator is made of a self-excited oscillator. The section is connected to the frequency generating circuit of the self-excited oscillator. The recorder is made of a frequency meter. The projecting part of the inner conductor is made of two members of the same length, but different diameters. The diameter of the end part exceeds that of the other part of the projecting part of the inner conductor by a factor of ten. The projecting part of the conductor can be covered with a dielectric shell.
EFFECT: enhanced sensitivity.
1 cl, 5 dwg
FIELD: measuring equipment engineering.
SUBSTANCE: device has excitation winding, fed by alternating current and measuring winding, connected to alternating voltage meter. Both windings are enveloped by protective cover, placed in controlled electric-conductive environment. To provide for high sensitivity to level of environment and decrease of temperature error from influence of construction materials, conductors of measuring winding are distanced from excitation winding conductors for distance, equal to one to ten sums of thickness of protective cover and radius of excitation winding cable cover. Also provided are different variants of constructions of level meters both with solenoid and frame windings.
EFFECT: higher precision.
7 cl, 5 dwg
FIELD: measurement technology.
SUBSTANCE: first measurement of level of liquid is performed from value of measured electric capacitance C1 of first radio-frequency detector. Density of gaseous phase is determined on the base of value of electric capacitance C3 of corresponding radio-frequency detector. Simultaneously the second measurement is performed of level of liquid in reduced or increased range of change on the base of measured value of electric capacitance C2 of corresponding radio-frequency detector. Then functional conversion of measured electric capacitances C1, C2 and C3 is performed and dielectric permeability of liquid and gaseous phases is measured.
EFFECT: improved precision of measurement; widened functional capabilities.
FIELD: electric engineering equipment.
SUBSTANCE: device can be used for measuring electric parameters of two-terminal devices used as physical process detectors (temperature, pressure, level of loose and liquid matters and et cetera) at transportation vehicles and in systems for measuring level of filling of rocket-space equipment. Device for measuring level of dielectric matter has first and second measuring inputs, sinusoidal voltage source, equivalent circuit preset unit, standard which has first output connected with first input of switching unit, current-to-voltage converter, scaling amplifier and analog-to-digital converter. Switching unit is made to be multi-channel one, which has first measuring, input with second output of standard and with output of sinusoidal voltage generator. Control input of the latter is connected with first output of frequency-control unit. Measuring inputs starting from second to (n+1) are connected with corresponding inputs of switching unit which has output connected with first outputs of electric capacity and active resistance calculators through current-to-voltage converter, scale amplifier and analog-to-digital converter all connected in series. It is also connected with first input of measurement control input which has outputs connected with control inputs of switching unit, of scale amplifier and analog-to-digital converter as well as with first input of frequency control unit and with second inputs of electric capacity and active resistance calculators. Control input of measurement control unit is connected with control output of mode control unit which has outputs connected with second input of frequency control unit, with equivalent circuit setting unit, with first input of electric capacitance total increment calculator, with first input of level calculator, with first input of electric capacitance current increment calculator and with input switching control unit. Output of the latter is connected with second control input of switch unit. Output electric capacitance calculator is connected with second input of calculator of current increment in electric capacitance. Output of the latter is connected with second input of level calculator. Third and fourth inputs of electric capacitance and active resistance calculators are connected with output equivalent circuit preset unit and with second output of frequency control unit. Output of calculator of current increment in electric capacitance is connected with third input of level calculator. Output of the latter as well as outputs of active resistance calculator and switch control unit have to be outputs of the device.
EFFECT: improved precision of measurement; improved manufacturability; improved efficiency of measurement.
FIELD: electric measurement engineering.
SUBSTANCE: method can be used for measurement of electrical parameters of two-terminal networks used as detectors of physical processes (temperature, pressure, level of liquid and loose maters et cetera) at industrial installations, transportation vehicles and in systems for measuring level of setting-up of rocket-space equipment. Sinusoidal voltage is formed in capacitive level gauge and complex current is measured which passes through dry capacitive level gauge as well as through filled-in capacitive level gauge. Equivalent circuit of capacitive level gauge is specified which circuit consists of electric capacitance and active resistance. Sinusoidal voltage is formed in capacitive detector at two frequencies. After it complex current is measured through dry level detector and through reference detector for any of those frequencies. Results of measurement are registered, electric capacitance of capacitive level gauge is measured and registered and increment in electric capacitance of capacitive level gauge is measured and registered when submerging gauge into dielectric matter completely. Subsequent measurement and registration of complex current is carried out through capacitive level gauge filled with dielectric matter and through reference gauge for any of mentioned frequencies. For any periodical measurement the electric capacitance of capacitive level gauge is measured and registered. Relative filling of capacitive level gauge with dielectric matter is measured as difference of values of electric capacitance of dry capacitive level gauge and electric capacitance of filled-up capacitive level gauge related to increment in electric capacitance of capacitive level gauge submerged into liquid totally.
EFFECT: improved precision of measurement; improved adaptability to manufacture.
FIELD: measuring equipment engineering, possible use for measuring level of liquid products, in particular, oil and oil products in railroad cisterns.
SUBSTANCE: level meter for measuring level of liquid contains bar with single capacity level indicators, positioned along its length, bar is made in form of hollow elongated construction, inside the construction a pair of electronic boards is positioned in form of rods, mounted in parallel to one another and at fixed distance from each other, forming single capacity level indicators on opposite planes facing each other, by means of electrodes on one electronic board and common electrode on the other board. When measuring level of liquid, serial scanning of indicators is performed in pairs of following indicator with previous one and on basis of received scanning results, level of liquid is calculated.
EFFECT: increased manufacturability, reliability and precision when measuring level of liquid product.
2 cl, 2 dwg
FIELD: measuring level of melt metals, possibly in systems for controlling manufacturing processes in metallurgical industry, for example in apparatuses for thermal-magnetic reduction of titanium.
SUBSTANCE: device includes exciting windings and metal level pickups in the form of induction turns, computing unit. Said windings and level pickups are placed in pairs around vessel with melt metal. Computing unit is connected with level pickups. It provides possibility for scanning pickups, digitizing voltage values of pickups, approximating pickups readings of designed curve found according to decision of simulation task, calculating derivative of said curve and determining metal level according maximum value of derivative. Excitement windings of device are connected in series and they form electromagnet.
EFFECT: enhanced accuracy, lowered labor consumption of measuring process.
2 cl, 3 dwg
FIELD: measuring technique.
SUBSTANCE: fuel level meter comprises elongated capacitive sensor connected in the frequency-generating circuits of functional and base self excited oscillators. The main and additional counters generate the position code of the fuel level from the output frequencies of the self-excited oscillators. The level is indicated by the linear or pointer indicator provided with a converter of position code into the current of supplied to the pointer indicator.
EFFECT: reduced power consumption and enhanced reliability.
2 cl, 2 dwg
FIELD: measuring equipment engineering.
SUBSTANCE: holding system for measuring device for controlling and/or determining level of environment in reservoir, containing at least one body (13) and at least one elongated block (1). In accordance to invention, body (13) of device includes at least one incision ring (4), which is cut into external layer of elongated block (1) oriented from end process with possible connection of elongated block (1) to body (13) of device electrically, with resistance to compression and stretching.
EFFECT: creation of holding system, by means of which holding block may be fastened on or in a body of device.
8 cl, 3 dwg