RU129146U1 - STAND FOR RESEARCH OF CONDITIONS OF LIFT LIFT WITH USE OF GAS - Google Patents

Abstract

1. A stand for studying the conditions of liquid lifting using gas, consisting of a pipe string, a supply and control unit for a fluid flow, a supply and control unit for a gas flow, including a compressor and an overpressure gas supply pipe, input devices into the column and a gas-liquid mixture from the column , a separator, the inlet of which is connected by a pipeline for discharging a gas-liquid mixture with a device for discharging a gas-liquid mixture from a column; three input into the column of gas-liquid mixture through the unit for supplying and regulating the flow of liquid, and the outlet for the gas separator is connected via a pipeline for supplying gas to the device for entering the column of the gas-liquid mixture through the unit for supplying and regulating the flow of gas, characterized in that it contains a pipeline for drying the stand, connected one end to the gas supply pipeline, the other end to the device for removing gas-liquid mixture from the column, and the gas supply and flow control unit is equipped with a pipe for drying the stand. 2. A bench for studying the conditions of liquid lifting using gas according to claim 1, characterized in that it contains measuring equipment.

Description

The utility model relates to the oil and gas industry and can be used to study the movement of flows in vertical and inclined pipelines (wells, loops from wells) during gas production.

A known installation for modeling the natural working conditions of wells of gas, gas condensate and oil fields (RF patent No. 48581, ЕВВ 47/00, publ. 10/27/2005), containing one or more pipe columns of different diameters, a node for supplying and regulating the flow of fluid, a compressor, a device for introducing into the column and discharging a gas-liquid mixture from the column, having a separator for liquid and gas, gas and liquid flow measuring instruments, pressure measuring instruments in the pipe string, means for discharging liquid and gas from the installation. The fluid flow supply and control unit includes a storage tank and a pump, the first output of which is connected to the storage tank by a pipe equipped with a shut-off and control device, the second pump inlet is connected to the separator liquid output by a pipe equipped with a pipe drain into the storage tank having a shut-off-control device and bypassing the pump, a bypass with a fluid flow regulator is made, the gas separator output is connected to the compressor inlet by a pipeline, which is equipped with a pipe and gas overpressure and gas discharge pipe, the pipes are equipped with shut-off and control devices, and a bypass with a gas flow regulator is installed bypassing the compressor.

The closest technical solution (prototype) to the claimed utility model is a bench for studying the conditions of liquid lifting using gas from wells of gas, gas condensate and oil fields (RF patent No. 48580, ЕВВ 47/00, publ. 27.10.2005), consisting of one or several columns of pipes of different diameters, a unit for supplying and regulating the flow of liquid, means for supplying and regulating the flow of gas, including a compressor, input devices into the column and the discharge from the column of a gas-liquid mixture having outlets for liquid and g a separator, gas and liquid flow measuring instruments installed between the gas-liquid mixture input device and the compressor and the liquid flow supply and control unit, respectively, pressure measuring devices in the pipe string and means for removing liquid and gas from the installation. The output of the separator for liquid is hydraulically connected to the input device to the column of gas-liquid mixture through the node for supplying and regulating the flow of liquid, the output of the separator for gas is connected to the device for entering the column of the gas-liquid mixture through the means for supplying and regulating the gas flow, which is equipped with an overpressure gas pipe and a discharge pipe gas.

A disadvantage of the known solutions is the change in the inner diameter and roughness of the inner surface of the pipelines due to the corrosion of metal components and elements during the shutdown of devices, because after conducting experiments with the liquid, the inner surface of the stand remains wet. As a result, the inner surface of the pipe string deteriorates (thinning and irregularities in the internal cross section of the pipes), which negatively affects the reliability of the studies. In addition, during operation of the stand, detachments of rusty inclusions occur, which, when moving in the stand, clog its main components, which can lead to breakage of individual elements of the stand and the formation of dull or poorly permeable plugs in the connecting pipelines.

The problem to which the proposed utility model is directed is to create a stand for studying the rise of liquid using gas, the design of which provides the possibility of drying the inner surface of the stand from the remaining liquid after it is drained.

The technical result achieved by the implementation of the utility model is to reduce corrosion of the metal surfaces of the stand, increase the service life of metal components and pipelines, as well as increase the reliability of the research.

The technical result is achieved due to the fact that the stand for studying the conditions of liquid lifting using gas consists of a pipe string, a supply and control unit for the flow of liquid, a supply and control unit for the gas flow, including a compressor and an overpressure gas supply pipe, input devices to the column and the outlet of the gas-liquid mixture column, the separator, the inlet of which is connected by a pipeline for the removal of the gas-liquid mixture with the device for removing the gas-liquid mixture from the column, the outlet for the liquid separator is connected n through the liquid supply conduit with an input device to the column through the liquid mixture feeding assembly and regulation of liquid flow, and an outlet for the gas separator is connected through gas feed conduit with an input into the column through the liquid mixture feeding portion and adjusting the gas flow rate. The bench further comprises a pipeline for drying the bench, connected at one end to the gas supply pipe, and the other end to the device for removing gas-liquid mixture from the column, and the gas supply and control unit for gas flow is equipped with a pipe for drying the bench.

A bench for studying the conditions of lifting a liquid using gas contains measuring equipment.

The drawing shows a diagram of a stand for studying the conditions of lifting a liquid using gas.

A bench for studying the conditions of liquid lifting using gas contains one or more pipe columns (1) of various diameters installed in a vertical or inclined position. In the lower part of the pipe string (1), a device (2) for introducing a gas-liquid mixture (GHS) into the column is installed, in the upper part, a device (3) for withdrawing from the GHS string. The stand includes a separator (4) having outlets for gas and liquid, the inlet of which is connected by a pipe (5) of the GHS drain with a device (3) of the drain from the GHS column. The fluid outlet of the separator (4) is connected by a fluid supply pipe (6) to a device (2) for introducing into the GHS column through a fluid flow supply and control unit (7), including a pump and shut-off and control valves. The gas outlet of the separator (4) is connected by a gas supply pipe (8) to the input device (2) to the GHS column through the gas supply and control unit (9). At the same time, in the device (2) for entering the GHS column, the liquid inlet is located below the gas inlet. The gas supply pipe (8) is equipped with a shut-off device (10). The gas supply and control unit (9) of the gas flow includes a compressor (11), a pipe (12) for supplying excess gas pressure, a pipe (13) for drying the stand and shut-off and control valves. The nozzles (12) and (13) are equipped with locking devices (14) and (15), respectively. The bench contains a pipeline (16) for drying the bench, one end connected to the gas supply pipe (8), and the other to the device (3) for removal from the GHS column, equipped with a locking device (17). As a pipeline (16) for drying the stand, a pipe string that is not involved in the experiment can be used. A drain pipe (18) equipped with a locking device (19) is connected to the device (2) for input into the GHS column.

The stand contains measuring equipment: gas and liquid flow meters, differential pressure transducers, pressure sensors, temperature sensors (not shown in the drawing). Gas and liquid flow meters are installed on pipelines (6), (8), respectively, immediately before entering the pipe string. Pressure difference transducers, pressure sensors and temperature sensors are installed both at the ends of the pipe string (1), and additionally (if necessary) in predetermined sections along the pipe string (1).

The proposed stand works as follows.

The stand is connected to an overpressure gas source using an overpressure gas supply pipe (12). Check that the locking devices (15), (17), (19) are closed and the locking device (10) is open. Then, the locking and regulating devices of the gas supply and control unit (9) of the gas flow are opened and all the elements of the stand are filled with gas to the required pressure. The pressure value is controlled by the readings of pressure sensors installed at the inlet or outlet of the pipe string (1). After the gas pressure in the bench reaches the desired value, turn on the compressor (11), while the gas from the separator (4) is sucked into the compressor (11) through the gas supply line (8), and then flows through the gas flow meter and device (2) ) entering the GHS column into the lower part of the pipe string (1). Gas entering the pipe string (1) rises upward through the pipe string (1) and through the drainage device (3) from the GHS column through the GHS discharge pipe (5) enters the separator (4) and then to the compressor (11). Gas filling the stand begins to circulate in the stand in a closed loop. The liquid is supplied to the supply and control unit (7) of the fluid flow, from which it flows through the fluid supply pipe (6) to the inlet device (2) to the GHS column, where it is mixed with gas. Under the influence of gas pressure, the GHS moves up the pipe string (1). Having reached the top of the column of pipes (1), the GHS through the device (3) of the drain from the GHS column through the pipeline (5) of the GHS drain enters the separator (4). In the separator, the liquid is separated from the gas and enters through the liquid supply line (6) to the liquid supply and control unit (7), and the gas enters the compressor (11) through the gas supply line (8). After the experiment, the liquid is drained through the drain pipe (18).

During an experiment to study the conditions for raising a liquid using gas, pressure is measured in predetermined sections of the pipe string (1) with pressure gauges or differential pressure gauges. After making the necessary measurements, change the technological parameters of the operation mode of the stand: pressure, gas flow (using the compressor (11)) and liquid (using the pump) or stop the stand by removing liquid from the pipe string (1) into the disposal system.

After the experiment is completed, the locking device (10) is closed and the locking devices (15), (17), (19) are opened. Turn on the compressor (11), with which atmospheric air is sucked in through the pipe (13) for drying the stand, and then it is pumped into the stand, where it comes from the gas supply pipeline (8) to the pipeline (16) for drying the stand. In this case, air is heated due to compression, and the relative moisture content decreases - the air becomes dry, capable of absorbing moisture. Further, the air through the pipeline (16) for drying the stand enters the device (3) for removal from the GHS column, from where part of the air flows from top to bottom along the pipe string (1) and is blown out through the drain pipe (18), and the other part through the pipeline (5) the GHS outlet is fed to a separator (4). Part of the air passes through the compressor (11) through the pipeline (8) for supplying gas to the pipeline (16) for drying the stand, and the other part passes through the pipeline (6) for supplying liquid and is blown out through the drain pipe (18). Thus, the nodes and pipelines of the stand are drained from top to bottom of the remaining liquid for 10–20 min by atmospheric air, which is discharged into the atmosphere at the bottom of the pipe string (1) through a drain pipe. Part of the air circulates in a closed cycle, which contributes to an increase in air temperature and leads to more intensive absorption of liquid from the inner surface of the stand. Then turn off the compressor (11), close the locking device (15), (17), (19) and open the locking device (10).

Using the proposed utility model will reduce the corrosion of the metal surfaces of the stand, increase the service life of metal components and pipelines, as well as increase the reliability of the research.

Claims (2)

1. A stand for studying the conditions of liquid lifting using gas, consisting of a pipe string, a supply and control unit for a fluid flow, a supply and control unit for a gas flow, including a compressor and an overpressure gas supply pipe, input devices into the column and a gas-liquid mixture from the column , a separator, the inlet of which is connected by a pipeline for discharging a gas-liquid mixture with a device for discharging a gas-liquid mixture from a column; three input into the column of gas-liquid mixture through the unit for supplying and regulating the flow of liquid, and the outlet for the gas separator is connected via a pipeline for supplying gas to the device for entering the column of the gas-liquid mixture through the unit for supplying and regulating the flow of gas, characterized in that it contains a pipeline for drying the stand connected one end to the gas supply pipeline, the other end to the device for removing gas-liquid mixture from the column, and the gas supply and control unit for gas flow is equipped with a pipe for drying the stand. 2. A bench for studying the conditions of liquid lifting using gas according to claim 1, characterized in that it contains measuring equipment.

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