RU133194U1 - STAND FOR RESEARCH OF GAS-HYDRODYNAMIC PROCESSES - Google Patents

Abstract

A stand for studying gas-hydrodynamic processes, containing an elevator experimental column, a fluid supply and control unit with shut-off and control valves, a gas supply pipeline with shut-off and control valves connected to a column input device installed in the lower part of the experimental lift column and equipped with a drain pipe, having a locking device, a device for withdrawing from the column is installed in the upper part of the elevator experimental column, and measuring equipment, characterized I mean that the stand is additionally equipped with a power unit designed with a turbine to provide air suction from the atmosphere to the elevator experimental column and gas to the atmosphere through a gas exhaust pipe equipped with shut-off and control valves from the exhaust device from the column, the liquid outlet of which through the supply unit and regulating the fluid supply is connected by a liquid supply pipeline to the input device to the column, the place of entry for gas supply to the input device to the column is located above the entry point of liquids, the experimental lift column is equipped with a thermal jacket, in the lower part of which there is a temperature sensor connected to the input of the control unit, the output of which is designed to supply control actions to the coolant circulation device, designed to circulate the coolant from the heater connected to the upper part of the thermal jacket by a pipe for circulating the coolant in its lower part.

Description

The utility model relates to techniques for studying the movement of flows and bulk materials, for example, gas production processes in the oil and gas industry, associated with the study of the processes of flows in vertical, inclined pipelines (wells) and individual devices.

The prior art stand for studying the conditions of liquid lifting using gas (RU 118354, U1, E21B 47/00, publ. 20.07.2012). A well-known stand includes an elevator pipe string, a unit for supplying and regulating the supply of liquid, a means for supplying and regulating a gas flow rate, which includes a compressor, an input device for the column and a discharge from the column, a separator, pressure measuring devices in the pipe elevator at the entrance to the elevator column pipes or at the exit of the tubing string. In addition, in the known stand, the liquid and gas inlets in the input device are arranged so as to prevent liquid from flowing from the liquid supply line to the gas supply line by placing the liquid inlet below the gas inlet. However, the well-known stand contains a large number of elements, nodes of the stand, pipelines, which complicates its maintenance and leads to significant time costs when upgrading the stand to solve new problems, increases the amount of time for manufacturing, re-arranging and re-arranging the stand.

The closest technical solution to the proposed stand, known from the prior art, is a stand for studying the conditions of liquid lifting using gas from wells of gas, condensate and oil fields (RU 48580, U1, E21B 47/00, published on October 27, 2005). The well-known stand is designed to study the conditions for lifting gas and liquid along the pipe risers. The stand includes one or more columns of pipes of various diameters, a unit for supplying and regulating the supply of liquid, means for supplying and regulating the flow of gas, which includes a compressor, a device for introducing into the column and discharging a gas-liquid mixture from the column, a separator having exits for liquid and gas, means for draining liquid and gas from the installation. The pipeline is equipped with a gas overpressure pipe and a gas discharge pipe. The known solution allows a qualitative analysis of the processes taking place in the volume of the pipe pipe string under conditions close to ideal. The well-known stand also contains a large number of elements, nodes of the stand, pipelines, which complicates its maintenance and leads to significant time costs when upgrading the stand to solve new problems, increases the amount of time for manufacturing, re-arranging and re-arranging the stand.

The problem to which the proposed utility model is directed is to create a stand that allows you to simulate and study gas-hydrodynamic processes on an elevator column.

The technical result of the utility model is to reduce the time spent on developing a methodology for studying gas-hydrodynamic processes, by reducing the time taken to assemble and rearrange the stand, in ensuring control and maintaining the set temperature inside the elevator column.

The essence of the utility model is that in the stand for the study of gas-hydrodynamic processes, containing an elevator experimental column, a node for supplying and regulating the supply of liquid with shut-off and regulating valves, a gas supply pipeline with shut-off and regulating valves, connected to the input device into the column, installed in the lower part of the elevator column and equipped with a drain pipe having a locking device, a device for withdrawing from the column installed in the upper part of the elevator column, and a measuring apparatus round additionally introduced unit designed to provide a turbine suction air from the atmosphere into the lift column and experimental release gas to the atmosphere gas outlet conduit provided with a shut-off control valves, the device removal from the column. The liquid outlet of the outlet device from the column through the supply and control unit of the fluid supply is connected by a fluid supply pipe to the input device to the column. The entry point for supplying gas to the column input device is located above the entry point for supplying liquid. The experimental elevator column is equipped with a thermal jacket, in the lower part of which a temperature sensor is installed connected to the input of the control unit. The output of the control unit is intended for supplying control actions to the coolant circulation device intended for circulating the coolant from the heater connected to the upper part of the thermal jacket by a pipeline for circulating the coolant to the lower part of the thermal jacket ..

The air sucked from the atmosphere into the elevator column gradually reduces the temperature of the gas-liquid mixture due to the evaporation of the liquid, which is especially typical for longer stand operation (more than 10 minutes), which negatively affects the experimental results. Therefore, to prevent a decrease in temperature, a thermal jacket is placed around the elevator column, which allows maintaining the temperature of the working medium in a given range.

The work of the stand for studying the conditions of gas-hydrodynamic processes is illustrated in the drawing.

A stand for studying the conditions of gas-hydrodynamic processes, consists of:

- an elevator experimental column (1) installed in a vertical or inclined position;

- in the lower and upper parts of the elevator experimental column (1), a device for introducing a gas-liquid mixture (GHS) into the column (2) and a mixture withdrawing device from the column (3) are respectively installed;

- gas supply pipeline (4) with shut-off and control valves;

- gas discharge pipeline (5) with the release into the atmosphere with shut-off and control valves;

- fluid supply pipe (6);

- a unit for supplying and regulating the supply of liquid (7), operating in a closed cycle, with shut-off and control valves;

- a drain pipe (8) with a locking device (9);

- power unit (10), designed to suck air into the elevator experimental column;

- a temperature sensor (11) installed in the lower part of the thermal jacket;

- a control unit (12) that provides temperature control in the stand;

- circulation device (13) of the coolant;

- heater (14);

- thermal shirts (15);

- pipeline for the circulation of the coolant (16);

- measuring equipment (gas and liquid flow meters, differential pressure transmitters, pressure sensors, etc. (not shown in the drawing)).

The control unit (12) acts as a temperature controller. It can be, for example, made on the basis of a dual-mode PID controller with automatic tuning, which has high accuracy and ease of use. The control unit provides two modes of operation with automatic tuning: a mode with a high slew rate of the transient response of the PID controller, which ensures a rapid achievement of the setpoint level, and a mode with a slow slew rate of the transient response to minimize overshoot with a slight increase in slew time.

Another example of a control unit can be a temperature controller RT-820M, designed to control and maintain a predetermined temperature mode by turning on / off a heating (cooling) unit according to the signals of an external indoor temperature sensor.

The coolant circulation device can be performed on the basis of a pump or compressor.

During operation, the stand is put into operation by turning on the power unit (10). After the power unit is turned on, air is drawn in from the atmosphere and through the gas supply pipe (4) and enters through the input device (2) into the lift column (1). By adjusting the power of the power unit, you can set the required gas flow. The gas flow rate is controlled by the flow meters. The gas entering the elevator experimental column (1) rises through the elevator column to its upper part and is discharged into the atmosphere through the gas discharge pipe (3) from the mixture through the gas exhaust pipe (5). The liquid is supplied to the supply and control unit for the fluid supply (7), and then to the input device to the column (2), in which the liquid is mixed with gas and the gas-liquid cooling unit rises through the experimental lift column (1) under the influence of gas pressure. Having reached its upper part, the GHS in the discharge device (3) is separated and through the fluid supply pipe (6) enters the fluid supply and regulation unit (7).

Monitoring and maintaining the set temperature inside the experimental lift column (1) takes place automatically by measuring the temperature with a temperature sensor (11) in the lower part of the thermal jacket (15). The measured values are transmitted to the control unit (12). The control unit provides an operation for comparing the measured value of the liquid temperature with the temperature specified by the experimental conditions. If, by comparison, the control unit (12) detects the deviation of the measured liquid temperature from the temperature specified by the experimental conditions, the control unit (12) generates a control action designed to supply the coolant circulation device (13), which circulates the coolant from the heater (14 ) through a pipeline for circulation of the coolant (16) to the lower part of the thermo shirt (15). In this case, the coolant through the upper part of the thermo shirt (15) enters the heater (14). Thus, due to heat transfer between the coolant and the housing of the elevator experimental column (1), the temperature inside the elevator experimental column (1) is maintained in a predetermined range. As the heat carrier, either air or water can be used. When the temperature of the liquid reaches a predetermined value by a set value, the control unit (12) generates a control action that enters the coolant circulation device (13), by which the circulation of the coolant from the heater (14) to the heat jacket (15) and back is stopped. Thus, due to the alternate creation and termination of the circulation of the coolant, the temperature inside the experimental lift column (1) is maintained in a given range.

After the experiment, the liquid is drained through the drain pipe (8) with a locking device (9) located in the lower part of the experimental lift column (1).

During a specific experiment, the pressure is measured by pressure gauges or differential pressure gauges (not shown in the drawing) at predetermined sections of the elevator experimental column (1). After making the required measurements, you can change the technological parameters of the operation mode of the stand: pressure, gas and liquid flow rates or stop the stand by removing liquid from the column into the disposal system.

In the proposed stand, due to the power unit installed in the upper part of the column, air is supplied by suction through the lower part of the column and is released into the atmosphere. At the same time, the work of the stand is not carried out in a closed cycle. The control unit and measuring equipment provide control of the operation of the stand and maintaining the set temperature inside the elevator column.

Claims (1)

A stand for studying gas-hydrodynamic processes, comprising an experimental elevator column, a fluid supply and control unit with shut-off and control valves, a gas supply pipeline with shut-off and control valves connected to a column input device installed in the lower part of the experimental lift column and equipped with a drain pipe, having a locking device, a device for withdrawing from the column is installed in the upper part of the elevator experimental column, and measuring equipment, characterized I mean that the stand is additionally equipped with a power unit designed with a turbine to provide air suction from the atmosphere to the elevator experimental column and gas to the atmosphere through a gas exhaust pipe equipped with shut-off and control valves from the exhaust device from the column, the liquid outlet of which through the supply unit and regulating the fluid supply is connected by a liquid supply pipeline to the input device to the column, the place of entry for supplying gas to the input device to the column is located above the entry point to supply liquid of liquids, the experimental lift column is equipped with a thermal jacket, in the lower part of which there is a temperature sensor connected to the input of the control unit, the output of which is designed to supply control actions to the coolant circulation device, designed to circulate the coolant from the heater connected to the upper part of the thermal jacket by a pipe for circulating the coolant in its lower part.

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