RU158539U1 - STAND TEMPERATURE REGULATOR FOR RESEARCH OF LIQUID LIFT USING GAS - Google Patents

Abstract

The temperature controller, including a cooling chamber, equipped with an outer casing and designed to be installed on the gas supply pipe, pre-filled with liquid and equipped with inlet and outlet openings, which are designed to install the fittings for supplying them from the atmosphere and venting gas into the atmosphere, respectively, from two the ends of the cooling chamber, the upper and lower covers are bolted by connecting elements to flanges intended for installation on a gas supply pipeline with a gasket Itel rings, on the side surface of the outer casing of the cooling chamber, sealing rings and washers are installed adjacent to the flanges and secured by bolted connecting elements.

Description

The utility model relates to techniques for studying gas production processes in the oil and gas industry related to the study of gas-liquid flow processes in vertical and deviated gas wells.

A bench is known from the prior art for studying the conditions of liquid lifting using gas from gas, gas condensate and oil field wells (see patent for utility model of the Russian Federation 129553 U1, class E21B 47/00, published on June 27, 2013). In the process of circulation in a closed circuit, the gas, liquid, working column and piping of the stand are heated, the water in it evaporates, the pressure in the experimental column increases. A disadvantage of the known stand is that it does not provide control of the temperature regime of the installation, and, therefore, has insufficient accuracy and reliability of the research.

The closest technical solution is a stand for studying the conditions of lifting liquid using gas (see patent for utility model of the Russian Federation 118354 U1, class E21B 47/00, publ. 20.07.2012). The composition of the known stand includes a unit for maintaining a predetermined temperature regime, which includes a heat exchanger, a coolant chamber, a circulation device (12), a control unit (13) creates a control action on the coolant circulation device (12), which circulates the coolant from the coolant chamber (11) (heater or refrigerator) to the heat exchanger (10) and vice versa. Thus, due to the heat exchange between the coolant and the gas in the heat exchanger housing (10), the gas temperature is maintained in the range specified by the experimental conditions. To control the temperature regime, the known installation requires a large number of equipment and has a complex structure.

The technical result of the utility model is to simplify the design of the temperature controller, designed for installation in a stand for studying the conditions of liquid lifting using gas.

The essence of the utility model is as follows.

The temperature controller of the stand for studying the rise of liquid using gas includes a cooling chamber equipped with an outer casing and intended for installation on a gas supply pipe, pre-filled with liquid and provided with inlet and outlet openings. The holes are intended for installation in them of fittings for supplying from the atmosphere and venting gas into the atmosphere, respectively. From the two ends of the cooling chamber, the upper and lower covers are bolted by connecting elements to flanges intended for installation on the gas supply pipeline with O-rings. O-rings and washers are installed on the side surface of the outer casing of the cooling chamber, adjacent to the flanges and secured by bolted connecting elements. The mentioned regulator is designed to work as part of a stand for studying the conditions of liquid lifting using gas, which includes at least one lift pipe string, a unit for supplying and regulating fluid flow, units for entering and removing the column from the column, and a separator. The input of the separator is connected by a connecting pipe to the node of removal from the column. In the said stand, the separator fluid outlet is connected via a fluid supply line to an inlet intended for supplying liquid to the input unit to the gas-liquid mixture column through the fluid supply and control unit. The gas outlet for the separator is connected to the gas supply and control unit for gas flow by a gas supply pipe connected to the gas-liquid mixture inlet node. As part of the mentioned stand, a control unit is also provided, which provides for interrogating the temperature sensor and transmitting the control action through the air circulation unit to the temperature controller.

In FIG. Figure 1 shows a stand for studying the conditions of liquid lifting using gas, which includes the use of a temperature controller for the stand. In FIG. 2 shows the design of the temperature controller of the stand.

The composition of the stand for studying the conditions of liquid lifting using gas (Fig. 1) and the temperature controller of the stand (Fig. 2) include:

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

- in the upper and lower parts of the elevator column there is a node for entering the column (4) with shut-off and control valves (19) for draining the liquid and a node for draining the gas-liquid mixture from the column (5);

- a gas flow supply and control unit (2), consisting of a compressor (9), a high pressure gas supply pipe (15) and a high pressure gas discharge pipe (16) with shut-off and control valves (17) and (18);

- separator (6);

- a unit for supplying and regulating the supply of liquid (3), operating in a closed cycle and shut-off and control valves;

- pipelines for gas supply (7) and liquid (8);

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

- the node maintaining the temperature conditions specified by the conditions of the experiment (14) includes

a) the temperature regulator of the stand (10);

b) air circulation unit (11), which can be implemented on the basis of a compressor or blower;

c) control unit (12);

d) a temperature sensor (13) installed directly in front of the entrance to the elevator column.

The scheme of the temperature controller of the stand (Fig. 2) includes:

- covers (20);

- O-rings (21) and (23);

- flanges (22);

- washers (24);

- outer casing (25);

- quick disconnect connection (26);

- washers (27);

- bolted connecting elements (27);

- fittings for discharge (28) and supply (29) of gas, respectively;

- cooling chambers (30).

The operation of the temperature controller in the stand for the study of the rise of liquid using gas is as follows. Before starting the test, the stand is connected to the high-pressure gas source by the gas supply pipeline to the stand (15). With open shut-off and control valves (17), gas is pumped into the stand. After reaching the necessary pressure in the stand, shut-off and control valves (17) are closed. After that, the compressor (9) is turned on, while the gas from the separator (6) is sucked into the compressor (9). In the compressor (9), the gas is compressed, its temperature rises, then the gas is supplied through the gas flow meter and the inlet unit of the gas-liquid mixture (4) to the lower part of the elevator column (1). The gas entering the elevator column (1) rises upward through the elevator column and, through the gas-liquid mixture removal unit (5) from the elevator column, flows through a pipeline to a separator (6) and then to a compressor (9). The gas filling the stand begins to circulate through the stand in a closed loop. In the control unit (12), the temperature value required for the experiment is set at the entrance to the elevator column (1). The control unit (12) interrogates the temperature sensor (13) and, in the event of a discrepancy between the set and measured temperature values by an amount exceeding the set interval, it generates a control action for the air circulation unit (11), which ensures the injection of air from the atmosphere into the temperature controller stand (10) through the gas supply fitting (29). The liquid pre-filled into the cooling chamber (30) begins to be sparged with an air stream. When bubbling the liquid, its evaporation occurs, accompanied by a decrease in the temperature of the liquid. Then, the air stream passing through the liquid layer goes back into the atmosphere through the gas outlet fitting (28). At predetermined time intervals, the control unit (12) interrogates the temperature sensor (13) and, upon reaching the set value of the temperature in the stand, sends a control action to the air circulation unit (11) to reduce air consumption.

The required amount of liquid is supplied to the unit for supplying and regulating the flow of liquid (3). Then, the liquid enters the gas-liquid mixture (4) inlet into the elevator column, in which the liquid is mixed with gas and the gas-liquid mixture rises along the elevator column under the influence of gas pressure (1). Having reached the top of the pipe riser (1), the gas-liquid mixture first enters the gas-liquid mixture removal unit (5), and then enters the separator (6) through the connecting pipe.

In the separator, the liquid is separated from the gas and flows through the pipeline (8) to the fluid supply and control unit (3), and the gas through the pipeline (7) to the compressor (9). Thus, the liquid circulates in a closed cycle. In this case, in automatic mode, the preset temperature is maintained during operation of the stand, at which the gas temperature is measured at the entrance to the elevator column. If the measured gas temperature deviates from the temperature specified by the conditions of the experiment, the control unit (12) creates a control action for the air circulation unit (11), which controls the air supply to the temperature controller of the stand (10). Thus, the temperature at the entrance to the elevator column (1) of the stand is maintained in the range specified by the experimental conditions. After the end of the experiment, the liquid is drained through a drain pipe with shut-off and control valves (19) located in the lower part of the gas-liquid mixture input unit (4).

During a specific experiment, pressure is measured in predetermined sections of the column (1) with pressure gauges or differential pressure gauges. After making the required measurements, change the technological parameters of the operating mode of the stand: pressure, gas flow rate - using a compressor (9), and liquid - using the unit for supplying and regulating the flow of liquid (3) or stop the stand by removing liquid from the column into the disposal system.

Claims (1)

The temperature controller, including a cooling chamber, equipped with an outer casing and designed to be installed on the gas supply pipe, pre-filled with liquid and equipped with inlet and outlet openings, which are designed to install the fittings for supplying them from the atmosphere and venting gas into the atmosphere, respectively, from two the ends of the cooling chamber, the upper and lower covers are bolted by connecting elements to flanges intended for installation on a gas supply pipeline with a gasket Itel rings, on the side surface of the outer casing of the cooling chamber, sealing rings and washers are installed adjacent to the flanges and secured by bolted connecting elements.

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