RU2403444C1 - Method for production of gassed bed fluid - Google Patents

Abstract

FIELD: mining. ^ SUBSTANCE: method is realised in all stages, by means of continuous fluid lift, by mutually replaceable pneumatic double-chamber displacement pumps connected by pipelines of produced fluid, vacuum, compressed air, spent and accompanying gases, power supply cable and equipped with injection and suction channels and through channels of vacuum, spent gas, compressed gas and through wire of electric circuit, with level sensors in each working chamber, three-stroke valve, electric double-sided pneumatic distributor and control unit in each stage. As liquid is sucked into one of working chambers - lower stage, three-stroke valve of which is installed when assembled into "vacuum" position, the other chamber of the same stage is simultaneously filled with compressed gas. By signals from level sensor, control unit generates a command to switch double-sided pneumatic distributor. Afterwards compressed gas is supplied into filled chamber of lower stage. Fluid is displaced into one of working chambers of upper stage, three-stroke valve of which is installed when assembled into position "spent gas", atmospheric air and/or spent gas from which is displaced along pipeline of spent and accompanying gases through compressor into compressed gas reservoir. As fluid fills one of working chambers of upper and lower stages, by signals from level sensors of upper and lower stages, their control units generate command to switch double-sided pneumatic distributors. ^ EFFECT: invention makes it possible to produce gassed fluid with mechanical admixtures from depths and wells with low debit, also due to continuous lift of fluid by mutually replaceable pneumatic double-chamber displacement pumps. ^ 5 dwg

Description

A method of producing a carbonated formation fluid relates to the field of oil production and can be used for the production of carbonated formation fluid from deep wells.

A known method of fluid production by sucker rod pumps (SHG) (Oil production reference. Authors: V.V.Andreev, K.R. Urazakov, V.U. Dalimov and others; Edited by K.R. Urazakov, M. , LLC Nedra-Business Center, 2000, chapter 5).

SHGN is expensive in manufacturing due to the use of high alloy steels and high-precision machining in manufacturing. Quite stringent requirements for tubing and tubing used in the extraction of sucker rod pumps, which makes their production and operation expensive.

SHGN has rather stringent requirements for the content of mechanical impurities in the produced fluid (up to 3.5 g / l), as well as for the content of free gas (up to 25%).

The strength of the rods and their deformation limit the depth of application of the SHGN with depths of up to 3200 m.

In the process of fluid production with the content of mechanical impurities in the SHGN, increased wear of the details of the deep pump, as well as the breakage of the rods, is observed, which leads to unplanned stops and repairs.

There is also a known method of fluid production by submersible electric multistage centrifugal pumps (ESP) (Oil production reference book. Authors: VVAndreev, K.R. Urazakov, V.U. Dalimov et al .; Edited by K.R. Urazakov . M., Nedra-Business Center LLC, 2000, chapter 6).

During oil production with a high gas content in this way, gas plugs are formed in the working chambers of the pump, which leads to unplanned shutdowns in the production process. The requirements for the content of solids in oil are quite stringent - not more than 0.5 g / l. The use of ESP in wells with a flow rate of less than 40 cubic meters per day is impractical. The content of mechanical impurities leads to increased wear of the pump parts, because of which it is necessary to make fairly frequent repairs. When mining with ESP, there is a danger of electric shock to personnel, since a high voltage current is used to operate the submersible pump.

The closest in technical essence is the method according to patent RU 2325553 "Method and device for lifting fluids from wells", from 07.1.1.2006, published. 05/27/2008, IPC F04B 47/00, including raising the liquid in the lower stage with a submersible electric pump and lifting the liquid in the upper stage with a deep rod pump (GSN), separating the liquid from the gas, and directing the gas into the annulus.

The rise of the liquid in the lower stage is carried out to a height exceeding the level of the entrance to the main shaft, while part of the liquid is directed into the annulus through the holes made in the tubing string at a height exceeding the level of the entrance to the main shaft.

The supply of liquid to the surface occurs intermittently due to the alternation in the GHSN of the processes of absorption and pushing to the surface, which affects the performance of the method. The performance of the submersible electric pump is higher than the performance of the main pump, this leads to increased wear of the first. The pressure in the tubing pipes remains high enough, which requires increased strength, this affects the weight of the entire structure. The pump is poorly suited for fluid production with a high content of solids. To supply a submersible electric pump, an electrical voltage is required, which is dangerous for people and animals, which imposes increased electrical safety requirements for this device.

The objective of the proposed technical solution is to create a method that is easily integrated into the existing oil production system and is simple to operate and maintain, allowing production from large depths of carbonated liquid with mechanical impurities and from wells with a small debit including.

The problem is solved by the method of producing formation carbonated liquid, including raising the liquid by pumps in several stages, the method being carried out in all stages by continuously lifting the liquid by interchangeable pneumatic two-chamber displacement pumps connected by pipelines of the produced liquid, vacuum, compressed air, exhaust and associated gases, power cable and equipped with discharge and suction channels and through channels of vacuum, exhaust gas, compressed gas and through m conductor circuit, with level sensors in each working chamber, a three-way valve, two-way valves and an electric control unit in each stage; when liquid is sucked into one of the working chambers of the lower stage, the three-way valve of which is installed during installation in the “vacuum” position, at the same time fill another chamber of this stage with compressed gas; based on the signals from the level sensor, the control unit generates a command to switch the two-way pneumatic distributor, after which compressed gas is supplied to the filled lower chamber, the liquid is displaced into one of the upper stage working chambers, the three-way valve of which is installed in the “exhaust gas” position during installation, atmospheric air and / or the exhaust gas from which is displaced through the exhaust and associated gas pipeline through the compressor into the compressed gas reservoir; when one of the working chambers of the upper and lower stages is filled with liquid, according to the signals from the level sensors of the lower and upper stages, their control units form a command to switch bilateral pneumatic valves.

The implementation of the method in all stages by interchangeable pneumatic two-chamber displacement pumps, with level sensors in each working chamber, a three-way valve, an electric two-way pneumatic distributor and a control unit in each stage allows each of the working chambers of all pump-modules to work alternately if one of the chambers is suction operated liquid through the suction channel, the second chamber at this time works to displace the liquid along the discharge channel, and vice versa. Due to this, a continuous fluid flow is created in the product line.

The installation of a three-way valve of any of the stages during installation to the “vacuum” or “exhaust gas” position makes the pumps interchangeable, suitable for operation in any stage, either lower or upper, depending on the position of the three-way valve specified during installation, as well as implement the method by connecting several pumps.

Pump modules of all stages are in standby mode until liquid enters one of the working chambers. When filling one of the chambers of the pump module of the upper stage with liquid, all 4 chambers of both stages simultaneously work. When filling with liquid one of the chambers of the pump module of each subsequent stage, all chambers of the involved stages work.

The performance of the multi-stage system used in this method of fluid production can vary in a wide range, for this it is enough to change the pressure of compressed air and the degree of vacuum vacuum. This makes it possible to adjust the performance of the method to the debit of the well.

The gas evolved during liquid production is removed from the working chambers of the lower stage pump together with the exhaust gas into the compressed gas tank through a three-way valve installed in the vacuum position through the vacuum pipe through the vacuum pump and compressor, and from the working chambers of all other stages together with the exhaust gas into the compressed gas tank through a three-way valve installed in the "exhaust gas" position through the exhaust and associated gas pipeline through the compressor.

The method of producing reservoir carbonated liquid is illustrated by the drawings, in which Figures 1 and 2 show a diagram of the production of carbonated liquid, figure 3 shows the initial stage of operation of the lower stage, figure 4 shows the second stage of operation of the lower stage and the initial stage of operation of the second stage, figure 5 shows the next stage of the steps.

1, 2, 3, 4 and 5 show the pump module 1 of the lower stage, the pump module 2 of the second stage, the pump module 3 of the third stage, the pump module 4N-1st stage, the pump module 5 of the upper stage , cable 6 suspended intermediate, earring 7 upper, earring 8 lower, cable 9 suspended multi-stage system, flange 10 support, pipe 11 of the produced fluid, produced fluid 12, pipe 13 receiving the first stage, plugs 14, pipe 15 of the vacuum cable 16 of the pump power supply -modules, pipeline 17 of exhaust and associated gases, pipeline 18 of compressed gas, scale f 19 power supply and control, a compressor 20 for pumping exhaust and associated gases, a reservoir 21 of compressed gas, a vacuum pump 22, a reservoir 23 for produced fluid, a pump 24 for pumping produced fluid and associated gas, a valve 25 for supplying compressed gas, a valve 26 for receiving compressed gas valve 27 overpressure of compressed gas, control valves 28, 29 and 45, pressure sensors 30, 31 and 32 discrete, level sensor 33 discrete, pipe 34, valve 35, line 36 for pumping produced fluid and associated gas, pipeline 37 forassociated gas removal from the produced gas reservoir, pipe 38 for associated gas removal from the compressed gas reservoir, power supply line 39, compressor power cable 40, vacuum pump power cable 41, produced liquid and associated gas pump pump power cable 42, control valve power cable 43 , line 44 information, jumper 46 for pumping exhaust and associated gases of the 1st stage of a multistage system, pneumatic distributor 47 electric bilateral, bl to control 48, three-way valve 49, working chamber 50 first, working chamber 51 second, float chamber 52 of the first working chamber, float chamber 53 of the second working chamber, float valve 54 with a built-in permanent magnet of the first working chamber, float valve 55 with a built-in permanent magnet second working chamber, saddle 56 lower than the first working chamber, saddle 57 lower than the second working chamber, saddle 58 upper of the first working chamber, saddle 59 upper of the second working chamber, level sensor 60 of the first working chamber, level sensor 61 of the second a working chamber; a suction valve 62 of the first working chamber, a suction valve 63 of the second working chamber, a pressure valve 64 of the first working chamber, a pressure valve 65 of the second working chamber, a suction channel 66, a pressure channel 67, a pneumatic vacuum channel 68 of the first working chamber, and a pneumatic vacuum second channel 69 of the second working chamber, channel 70, wire 71 of the electrical circuit through, channel 72 of compressed gas through, channel 73 through vacuum, channel 74 of exhaust and associated gases through.

The method of producing reservoir carbonated liquid is carried out by a multi-stage lifting system from boreholes, which is performed as follows.

The system consists of completely interchangeable pump modules (Fig. 1), which are borehole pneumatic replacement pumps: pump module of the lower stage 1, pump module of the second stage 2, pump module of the third stage 3, pump module N-1 of the stage 4, the pump module of the upper stage 5, which are interconnected by pipelines, vacuum 15, compressed gas 18, exhaust and associated gases 17, produced fluid 11, as well as the power cable 16.

The system is suspended in the well on the support flange 10 with a cable 9 for the upper earring 7 of the upper pump module 5, all other pump modules are suspended under each other for the lower earrings 8 of the upper pump modules and the upper earrings 7 of the lower pump modules with intermediate cables 6.

Through channels are made in each pump module: compressed gas lines 72, vacuum lines 73 and exhaust and associated gas lines 74, as well as a wire of an electrical circuit 71.

The number of stages of a multi-stage deep pump depends on the height of the liquid and is determined by the formula

N = H / L

where N is the number of stages of a multi-stage deep pump;

H is the height of the liquid;

L is the distance between the pump modules (L = from 3 to 50 m).

The operating pressure in any pump module of the system does not exceed 1.0 MPa. This is enough, since each pump module of the system is designed to lift the fluid only one step, to a height of up to 50 meters, that is, to the next pump module.

When applying operating pressure in excess of 1.0 MPa, the distance between pumps with a reinforced casing and parts can be increased and exceed 50 m.

Pumps-modules, starting from the second stage to the top, are interconnected equally. A pipe 18 is connected to the upper exit of the through gas channel of compressed gas 72 of the upper pump module 5, the other end of which is connected to the compressed gas tank 21 through a control valve 28 and valve 25. A pipe 15 is connected to the upper exit of the through channel of the vacuum 73 of the upper pump module 5, the other end of which is connected to the vacuum pump 22. To the upper outlet of the through channel of the exhaust and associated gases 74 of the upper pump module 5, a pipe 17 is connected, the other end of which is connected to the compressor 20 for pumping out tavshego and associated gas into the reservoir 21 of pressurized gas through the valve 26. The upper connector (not shown) of the wire circuit 71 of the upper pump module 5 connected to the power cable 16 pump modules, which other end is connected to the cabinet 19 and the power control. Power supply and control of the compressor 20 is carried out on line 40, on line 41 by a vacuum pump 22, on line 42 by a pump 24 for pumping produced fluid and associated gas. To regulate the pressure of the compressed gas and pump out the associated gas creating excessive pressure, an overpressure valve 27 and a control valve 29 are installed on the associated gas pipe 21 in the compressed gas pipeline. A discrete pressure sensor 30 is installed to measure the pressure in the compressed gas tank 21, the data from which transmitted through the information line 44 to the controller (not shown). A discrete pressure sensor 31 is installed to measure the pressure in the compressed gas pipeline 18. A discrete pressure sensor 32 is installed to measure the pressure in the produced liquid tank 23. A discrete level sensor 33 is installed to measure the liquid level in the produced liquid tank 23. Information from the pressure and level sensors is transmitted via information line 44 to an industrial controller (not shown), which is located in the power supply and control cabinet 19.

The method of producing carbonated liquid is as follows.

On the pump module of the lower stage 1, the three-way valve 49 (Figs. 3, 4 and 5) is installed in the “vacuum” position when the system is installed, while the channel 70 is connected to the through vacuum channel 73 to create a vacuum in the working chambers 50 and 51. On the pump modules of the remaining stages, the three-way valve 49 is set to the "exhaust gas" position, while the channel 70 is connected to the through channel of the exhaust and associated gases 74.

Each of the working chambers 50, 51 of all pump-modules operates alternately, if one of the chambers works to absorb liquid through the suction channel 66, the second chamber at this time works to displace the liquid through the discharge channel 67, and vice versa. Due to this create a continuous flow of fluid in the pipe 11.

Pump-modules are in standby mode until liquid enters one of the working chambers. When filling one of the working chambers of the pump module of the second stage 2 with liquid, all 4 chambers of both stages work simultaneously. When filling with liquid one of the chambers of the pump module of each subsequent stage, all chambers of the involved stages work.

Let us consider in more detail the operation of the system with this method.

When you turn on the system of multi-stage lifting of aerated liquid by pressing the "START" button on the power supply and control cabinet 19 (Fig. 2), the industrial control controller located in the cabinet 19 (not shown in the drawing) gives the command to open the control valve 28 according to the program. 24V power supply via cable 16 to all pump modules (Figs. 1, 2, 3, 4, and 5). Compressed gas enters through the pipeline 18 to all pump modules, while one of the working chambers 50 or 51 of all pump modules is filled with compressed gas until the maximum working pressure equal to the pressure in the compressed gas pipeline 18 is reached. At the same time, the vacuum pump 22 is turned on, and through the pipe 15 in one of the working chambers 50 or 51 of the pump module 1 of the lower stage by creating a three-way valve 49 in the vacuum position, a vacuum is created. The vacuum pump 22 also serves to pump out the exhaust and associated gases from the working chambers 50 and 51 of the lower stage pump module 1 through the pipe 15 and the jumper 46 into the pipe 17 for further pumping into the tank 21.

As the pressure equalizes in the pipe 18 and the tank 21, which is monitored by pressure sensors 30 and 31, the compressor 20 is turned on. At the same time, the exhaust and associated gases are pumped into the tank 21 through the pipe 17, through the through channel of the exhaust and associated gases 74 due to the installation of a three-way tap 49 to the "exhaust gas" position from the working chambers 50 and 51 of the pump modules of all stages, except the first.

In the process of producing soda liquid, when the liquid is sucked into the working chambers 50 and 51, associated gases are released, which are removed together with the exhaust gas from the lower stage pump module 1 through the vacuum pipeline 15, and from the remaining pump modules by the exhaust and associated gas pipeline 17 into the reservoir 21. This leads to an increase in the pressure of the compressed gas in the reservoir 21. To prevent the increase in the pressure of the compressed gas above the permissible value, an overpressure valve 27 and a shut-off valve 29 are used. When equalizing the pressure in the tank 21 and in the pipe 18, the shut-off valve 29 opens to remove associated gas from the tank 21 to the line 36 through the overpressure valve 27 through the pipe 38 by the pump 24.

To monitor the liquid level in the tank 23 and control the pump 24, a discrete level sensor 33 is built into the tank 23. To monitor the pressure of the associated gas emitted from the produced liquid, a pressure sensor 38 is built into the tank 23, it serves to control the valve 45 when pumping the associated gas.

At the initial moment of operation, which of the chambers of the pump modules will be filled with compressed gas, depends on the position of the valve 47 of each pump module. In this case, the magnetic float valves 54 and 55 on all pump modules, being in the lower position, will block the seats 56 or 57 and will prevent the leakage of compressed gas into the pipe 11.

Simultaneously with the supply of compressed gas (Fig. 3), one of the channels, depending on the position of the valve 47, for example, through channel 69 into the chamber 51 of the pump module of the lower stage 1 in another chamber 50 through the channel 68 creates a vacuum. In the chamber 50, a vacuum is created, as a result of which, through the intake pipe 13 immersed in the liquid 12, the suction channel 66 and through the suction valve 62 begins to flow into the chamber 50, while the magnetic float valve 54 floats until it reaches reed level sensor 60, which gives a signal to the control unit 48. The control unit generates a command to switch the two-way valve 47.

After switching the pneumatic distributor 47 (Fig. 4), compressed gas already begins to flow through the channel 68 into the chamber 50 of the lower pump module 1, while displacing the liquid into the chamber 51 of the pump module 2 of the second stage through the valve 64 through the discharge channel 67, pipe 11 and the suction channel 66 of the pump module 2 of the second stage through the suction valve 63 of the same pump module.

In this case, a vacuum is created in the working chamber 51 of the pump module 1 through the channel 69, which sucks in the liquid 12 through the pipe 13 and the suction channel 66 through the valve 63, and the compressed gas is in the working chamber 51 and is removed from it into the vacuum pipe 15 through the seat 59 through the pneumatic vacuum channel 69, through the pneumatic distributor 47 through the channel 70 through the three-way valve 49, which is set to the vacuum position and the through vacuum channel 73 through the vacuum pipe 15 through the vacuum pump 22 into the compressed gas reservoir 21. As the liquid enters the working cameras 51 magnetic float valves of 55 pump modules 1 and 2 float up, float until they reach reed level sensors 61, which give a signal to control units 48.

The control units of the pump modules 1 and 2 form commands for switching two-way pneumatic valves 47 of each of modules 1 and 2.

After switching the pneumatic valves 48 on the pump modules 1 and 2 (Fig. 5), compressed gas begins to flow into the chambers 51 of the pump modules 1 and 2. From the chambers 51, the liquid is forced into the working chambers 50 of the pump modules 2 and 3 through the valves 65 discharge channels 67, through the product pipe 11, through the suction channels 66 of the pump modules 2 and 3, through the suction valves 62, and the compressed gas from these chambers is displaced by the incoming fluid into the pipe 17 through the pneumatic vacuum channels 68 through the pneumatic valves 47, the three-way valve 49 of which is installed to the floor the exhaust gas and the through channel of the exhaust and associated gases 74. At the same time, a vacuum is created in the chamber 50 of the lower pump module 1, which sucks the liquid into it through the intake pipe 13 immersed in the liquid 12, the suction channel 66 and through the suction the valve 62 begins to receive liquid into the chamber 50. As the liquid enters the working chambers 50 of the pump modules 2 and 3, compressed gas is displaced into the exhaust and associated gas piping 17 and magnetic float valves 54 float until the reed switches are reached level sensors 60, after which the sensors give a signal to the control units 48. The control units of the pump modules 1, 2 and 3 form commands for switching two-way pneumatic valves 47 of each of the modules 1, 2 and 3.

Thus, the cycle is repeated on all involved pump-modules, which leads to a continuous rise in the liquid until the supply of compressed gas, power supply or vacuum to the pump-modules is stopped.

The technical result is the creation of a method that allows production from large depths of carbonated liquid with mechanical impurities and from wells with a small debit, including through the continuous lifting of the fluid by interchangeable pneumatic two-chamber displacement pumps connected by pipelines of the produced fluid, vacuum, compressed air, exhaust and associated gas, power cable and equipped with discharge and suction channels and through channels of vacuum, exhaust gas, compressed of gas and cross-wire circuit, with level sensors in each working chamber, a three-way valve, two-way valves and an electric control unit in each stage; when liquid is sucked into one of the working chambers of the lower stage, the three-way valve of which is installed during installation in the “vacuum” position, at the same time fill another chamber of this stage with compressed gas; based on the signals from the level sensor, the control unit generates a command to switch the two-way pneumatic distributor, after which compressed gas is supplied to the filled lower chamber, the liquid is displaced into one of the upper stage working chambers, the three-way valve of which is installed in the “exhaust gas” position during installation, atmospheric air and / or exhaust gas from which the exhaust and associated gases are displaced through the compressor through a compressor into a compressed gas reservoir; when one of the working chambers of the upper and lower stages is filled with liquid according to signals from the level sensors of the lower and upper stages, their control units form a command to switch bilateral pneumatic distributors.

The principle of the system allows the production of a liquid with a high content of associated gas, as it is sucked out of the working chambers of the pump modules as it is released from the liquid and does not interfere with the operation of the pump modules.

When producing liquid from any depth, the working pressure in the pipelines for the extraction of the product and the compressed gas of the system does not exceed 1.0 MPa, which allows the use of lightweight pipes and lightweight module pumps.

This makes the entire suspension structure of the system light enough and makes it possible to use it at considerable depths.

All pumps-modules of the system are interchangeable, which makes it possible to minimize the cost of manufacturing.

Claims (1)

A method for producing reservoir carbonated liquid, which includes raising the liquid with pumps in several stages, characterized in that the method is carried out in all stages by continuously lifting the liquid with interchangeable pneumatic two-chamber displacement pumps connected by pipelines of the produced liquid, vacuum, compressed air, exhaust and associated gases, power cable and equipped with discharge and suction channels and through channels of vacuum, exhaust gas, compressed gas and through an electric circuit gadget, with level sensors in each working chamber, a three-way valve, an electric two-way pneumatic distributor and a control unit in each stage; when liquid is sucked into one of the working chambers of the lower stage, the three-way valve of which is installed during installation in the “vacuum” position, at the same time fill the other chamber of the lower stage with compressed gas; based on the signals from the level sensor, the control unit generates a command to switch the two-way pneumatic distributor, after which compressed gas is supplied to the filled lower chamber, the liquid is displaced into one of the upper stage working chambers, the three-way valve of which is installed in the “exhaust gas” position during installation, atmospheric air and / or the exhaust gas from which is displaced through the exhaust and associated gas pipeline through the compressor into the compressed gas reservoir; when one of the working chambers of the upper and lower stages is filled with liquid according to signals from the level sensors of the lower and upper stages, their control units form a command to switch bilateral pneumatic distributors.

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