CN210977424U - Liquid carbon dioxide huff and puff device - Google Patents
Liquid carbon dioxide huff and puff device Download PDFInfo
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- CN210977424U CN210977424U CN201921187556.0U CN201921187556U CN210977424U CN 210977424 U CN210977424 U CN 210977424U CN 201921187556 U CN201921187556 U CN 201921187556U CN 210977424 U CN210977424 U CN 210977424U
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 294
- 239000007788 liquid Substances 0.000 title claims abstract description 272
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 147
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 147
- 238000002347 injection Methods 0.000 claims abstract description 101
- 239000007924 injection Substances 0.000 claims abstract description 101
- 238000000926 separation method Methods 0.000 claims abstract description 27
- 238000003860 storage Methods 0.000 claims description 21
- 238000005273 aeration Methods 0.000 claims description 2
- 239000003129 oil well Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 7
- 238000001802 infusion Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 9
- 230000008676 import Effects 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000002595 cold damage Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000009084 Cold Injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses a liquid carbon dioxide device of taking in and send out belongs to the oil well equipment field. The device includes: the device comprises an inlet-outlet assembly, a pipeline assembly, a gas-liquid separation assembly, a booster pump assembly and an injection pump assembly, wherein the inlet-outlet assembly comprises an inlet union and an outlet union, the pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline, the gas-liquid separation assembly comprises a gas-liquid separator, a first gas-liquid inlet, a first gas outlet and a first liquid outlet which are arranged on the gas-liquid separator, and the booster pump assembly comprises a booster pump, and a second gas-liquid inlet, a second gas outlet and a second liquid outlet which are arranged on the booster pump; the infusion pump assembly includes an infusion pump and a third liquid inlet, a third gas outlet, and a third liquid outlet disposed on the infusion pump. The problem of gaseous carbon dioxide can cause certain damage to the injection pump among the correlation technique, then reduce the injection volume of liquid carbon dioxide is solved, the effect of improving carbon dioxide injection volume has been reached.
Description
Technical Field
The utility model relates to an oil well equipment field, in particular to liquid carbon dioxide device of taking in and send out.
Background
At present, during the oil extraction process of an oil well, the permeability of an oil reservoir can be improved by injecting liquid carbon dioxide into the oil well, so that the recovery ratio of the oil well is improved.
A liquid carbon dioxide throughput device in the related art comprises an extractor tube, an injection pump and an injection tube. One end of the liquid pumping pipe is connected with the carbon dioxide storage tank, the other end of the liquid pumping pipe is connected with the injection pump, one end of the injection pipe is connected with the injection pump, and the other end of the injection pipe is communicated with the wellhead. The injection pump pumps the liquid carbon dioxide out of the carbon dioxide liquid storage tank through the liquid pumping pipe and then pumps the liquid carbon dioxide into the well through the injection pipe.
In the process of implementing the present invention, the inventor finds that the related art has at least the following problems: the injection pump in the device is easy to gasify the liquid carbon dioxide in the process of pumping the liquid carbon dioxide, and the gaseous carbon dioxide can cause certain damage to the injection pump, so that the injection amount of the liquid carbon dioxide is reduced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a liquid carbon dioxide device of handling in, can solve the problem that reduces liquid carbon dioxide's the input among the correlation technique. The technical scheme is as follows:
according to the utility model discloses a first aspect provides a liquid carbon dioxide device of taking in and send out, liquid carbon dioxide device of taking in and send out includes:
the device comprises an inlet and outlet assembly, a pipeline assembly, a gas-liquid separation assembly, a booster pump assembly and an injection pump assembly;
the inlet and outlet assembly comprises an inlet union and an outlet union, the inlet union is connected with the carbon dioxide liquid storage tank, and the outlet union is connected with a wellhead.
The pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline, one end of the first pipeline is connected with the gas-liquid separation assembly, the other end of the first pipeline is connected with the injection pump assembly, one end of the second pipeline is connected with the inlet union, the other end of the second pipeline is connected with the injection pump assembly, one end of the third pipeline is connected with the injection pump assembly, and the other end of the third pipeline is connected with the outlet union;
the gas-liquid separation assembly comprises a gas-liquid separator, and a first gas-liquid inlet, a first gas outlet and a first liquid outlet which are arranged on the gas-liquid separator, the first gas-liquid inlet is connected with the inlet union, the first liquid outlet is connected with the booster pump assembly, and the first gas outlet is configured to discharge gas in the gas-liquid separator;
the booster pump assembly comprises a booster pump, and a second gas-liquid inlet, a second gas outlet and a second liquid outlet which are arranged on the booster pump, wherein the second gas-liquid inlet is connected with the first liquid outlet, the second gas outlet is connected with the first pipeline, and the second liquid outlet is connected with the second pipeline;
the injection pump assembly comprises an injection pump, a third liquid inlet, a third gas outlet and a third liquid outlet, wherein the third liquid inlet, the third gas outlet and the third liquid outlet are arranged on the injection pump, the third liquid inlet is connected with one end, far away from the inlet union, of the second pipeline, the third gas outlet is connected with one end, far away from the gas-liquid separator, of the first pipeline, and the third liquid outlet is connected with one end, far away from the outlet union, of the third pipeline.
Optionally, the carbon dioxide throughput device further comprises a moving plate,
the inlet and outlet assembly, the pipeline assembly, the gas-liquid separation assembly, the booster pump assembly and the injection pump assembly are all arranged on the moving plate.
Optionally, the third pipeline further includes a heating line, and the heating line is disposed at the outlet union end far away from the injection pump.
Optionally, the number of the inlets union and the carbon dioxide liquid storage tank is at least two, and the at least two inlets are arranged side by side.
Optionally, the inlet union further comprises a butterfly valve, and the butterfly valves are arranged on the plurality of interfaces.
Optionally, the inlet union further comprises an air release valve, and the air release valve is arranged on one side, far away from the interface, of the butterfly valve.
Optionally, the first pipeline is provided with a first stop valve, a first flow meter, a first pressure transmitter and a first accumulator.
Optionally, a throttle valve and a needle valve are arranged on the second pipeline.
Optionally, a second accumulator, a second pressure transmitter, a check valve and a second stop valve are arranged on the third pipeline.
Optionally, the carbon dioxide huff and puff device further comprises a control assembly, and the control assembly is connected with the gas-liquid separation assembly, the booster pump assembly and the injection pump assembly.
The embodiment of the utility model provides a beneficial effect that technical scheme brought includes at least:
the liquid carbon dioxide huff and puff device comprises an inlet and outlet assembly, a pipeline assembly, a gas-liquid separation assembly, a booster pump assembly and an injection pump assembly, wherein the inlet and outlet assembly comprises an inlet union and an outlet union, the inlet union is connected with a carbon dioxide liquid storage tank, and the outlet union is connected with a wellhead. The pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline, one end of the first pipeline is connected with the gas-liquid separation assembly, the other end of the first pipeline is connected with the injection pump assembly, one end of the second pipeline is connected with the inlet union, the other end of the second pipeline is connected with the injection pump assembly, one end of the third pipeline is connected with the injection pump assembly, and the other end of the third pipeline is connected with the outlet union; the gas-liquid separation assembly comprises a gas-liquid separator, and a first gas-liquid inlet, a first gas outlet and a first liquid outlet which are arranged on the gas-liquid separator, the first gas-liquid inlet is connected with the inlet union, the first liquid outlet is connected with the booster pump assembly, and the first gas outlet is configured to discharge gas in the gas-liquid separator; the booster pump assembly comprises a booster pump, and a second gas-liquid inlet, a second gas outlet and a second liquid outlet which are arranged on the booster pump, wherein the second gas-liquid inlet is connected with the first liquid outlet, the second gas outlet is connected with the first pipeline, and the second liquid outlet is connected with the second pipeline; the injection pump assembly comprises an injection pump, a third liquid inlet, a third gas outlet and a third liquid outlet, the third liquid inlet, the third gas outlet and the third liquid outlet are arranged on the injection pump, the third liquid inlet is connected with one end, far away from the inlet union, of the second pipeline, the third gas outlet is connected with one end, far away from the gas-liquid separator, of the first pipeline, and the third liquid outlet is connected with one end, far away from the outlet union, of the third pipeline. The gas-liquid separator can circulate exhaust and continuously inject carbon dioxide into the well outside the pipeline, the booster pump and the gas discharge device in the injection pump, so that the problem that the injection amount of liquid carbon dioxide is reduced because gaseous carbon dioxide can cause certain damage to the injection pump in the related technology is solved, and the effect of improving the injection amount of carbon dioxide is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a liquid carbon dioxide huff and puff device provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of another liquid carbon dioxide huff and puff device provided by the embodiment of the invention.
With the above figures, certain embodiments of the present invention have been shown and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The carbon dioxide can be kept in a liquid state when the temperature is below minus 20 ℃ and the air pressure is about 2.5MPa, and the low-temperature liquid carbon dioxide in the carbon dioxide liquid storage tank is directly injected into the oil well by the liquid carbon dioxide huff-puff device used in the prior art, so that the low temperature can cause certain cold damage to a shaft string of the oil well.
Secondly, the liquid carbon dioxide is easy to gasify at normal temperature, that is, after the injection pump used in the prior art pumps the liquid carbon dioxide out of the carbon dioxide liquid storage tank, the liquid carbon dioxide in the normal temperature state is partially gasified, the gas carbon dioxide in the injection pump can cause certain damage to the injection pump, and the service life of the injection pump is shortened. And when more gas carbon dioxide is stored in the injection pump, the injection amount of the injection pump is reduced, so that the injection amount of the liquid carbon dioxide is reduced, and the technical requirement of the throughput of the liquid carbon dioxide cannot be met.
The embodiment of the utility model provides a liquid carbon dioxide device of taking in and send out can solve the problem that appears in the correlation technique.
Fig. 1 is a schematic structural diagram of a liquid carbon dioxide huff and puff device according to an embodiment of the present invention. The liquid carbon dioxide huff and puff apparatus 10 may comprise:
the device comprises an inlet and outlet assembly, a pipeline assembly, a gas-liquid separation assembly, a booster pump assembly and an injection pump assembly;
the inlet and outlet assembly comprises an inlet union 11 and an outlet union 12, the inlet union 11 being connected to a carbon dioxide storage tank (not shown) and the outlet union 12 being connected to a wellhead (not shown).
The pipeline assembly comprises a first pipeline 13, a second pipeline 14 and a third pipeline 15, one end of the first pipeline 13 is connected with the gas-liquid separation assembly, the other end of the first pipeline is connected with the injection pump assembly, one end of the second pipeline 14 is connected with the inlet union 11, the other end of the second pipeline is connected with the injection pump assembly, one end of the third pipeline 15 is connected with the injection pump assembly, and the other end of the third pipeline is connected with the outlet union 12.
The gas-liquid separation assembly includes a gas-liquid separator 16 and a first gas-liquid inlet 161, a first gas outlet 162 and a first liquid outlet 163 disposed on the gas-liquid separator 16, the first gas-liquid inlet 161 being connected to the inlet union 11, the first liquid outlet 163 being connected to the booster pump assembly, the first gas outlet 162 being configured to discharge gas in the gas-liquid separator 16.
The booster pump assembly comprises a booster pump 17, and a second gas-liquid inlet 171, a second gas outlet 172 and a second liquid outlet 173 which are arranged on the booster pump 17, wherein the second gas-liquid inlet 171 is connected with the first liquid outlet 163, the second gas outlet 172 is connected with the first pipeline 13, and the second liquid outlet 173 is connected with the second pipeline 14.
The infusion pump assembly comprises an infusion pump 18 and a third liquid inlet 181, a third gas outlet 182 and a third liquid outlet 183 provided in the infusion pump 18, the third liquid inlet 181 being connected to the end of the second conduit 14 remote from the inlet union 11, the third gas outlet 182 being connected to the end of the first conduit 13 remote from the gas-liquid separator 16, and the third liquid outlet 183 being connected to the end of the third conduit 15 remote from the outlet union 12.
To sum up, the embodiment of the utility model provides an including importing and exporting subassembly, pipeline subassembly, gas-liquid separation subassembly, booster pump subassembly and the liquid carbon dioxide device of taking in and send out of pouring into the pump subassembly, wherein import and export the subassembly including import union and export union, import union is connected with the carbon dioxide liquid storage pot, exports the union and is connected with the well head. The pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline, one end of the first pipeline is connected with the gas-liquid separation assembly, the other end of the first pipeline is connected with the injection pump assembly, one end of the second pipeline is connected with the inlet union, the other end of the second pipeline is connected with the injection pump assembly, one end of the third pipeline is connected with the injection pump assembly, and the other end of the third pipeline is connected with the outlet union; the gas-liquid separation assembly comprises a gas-liquid separator, and a first gas-liquid inlet, a first gas outlet and a first liquid outlet which are arranged on the gas-liquid separator, the first gas-liquid inlet is connected with the inlet union, the first liquid outlet is connected with the booster pump assembly, and the first gas outlet is configured to discharge gas in the gas-liquid separator; the booster pump assembly comprises a booster pump, and a second gas-liquid inlet, a second gas outlet and a second liquid outlet which are arranged on the booster pump, wherein the second gas-liquid inlet is connected with the first liquid outlet, the second gas outlet is connected with the first pipeline, and the second liquid outlet is connected with the second pipeline; the injection pump assembly comprises an injection pump, a third liquid inlet, a third gas outlet and a third liquid outlet, the third liquid inlet, the third gas outlet and the third liquid outlet are arranged on the injection pump, the third liquid inlet is connected with one end, far away from the inlet union, of the second pipeline, the third gas outlet is connected with one end, far away from the gas-liquid separator, of the first pipeline, and the third liquid outlet is connected with one end, far away from the outlet union, of the third pipeline. The gas-liquid separator can circulate exhaust and continuously inject carbon dioxide into the well outside the pipeline, the booster pump and the gas discharge device in the injection pump, so that the problem that the injection amount of liquid carbon dioxide is reduced because gaseous carbon dioxide can cause certain damage to the injection pump in the related technology is solved, and the effect of improving the injection amount of carbon dioxide is achieved.
Fig. 2 is a schematic structural diagram of another liquid carbon dioxide huff and puff device according to an embodiment of the present invention. The liquid carbon dioxide huff and puff apparatus 10 may comprise:
optionally, the liquid carbon dioxide huff and puff device further comprises a moving plate 19, and the inlet and outlet assembly, the pipeline assembly, the gas-liquid separation assembly, the booster pump assembly and the injection pump assembly are all arranged on the moving plate 19. The movable plate can be a metal plate which can be used for arranging all the components, and an injection pump in the prior art is directly arranged at a fixed wellhead and cannot be flexibly transferred according to the oil well requirement. The embodiment of the utility model provides an in, to import and export subassembly, pipeline subassembly, gas-liquid separation subassembly, booster pump subassembly and injection pump subassembly and all set up on the movable plate, thereby can drag the movable plate through the trailer and remove whole liquid carbon dioxide device of taking in and send out to shift when other oil wells need carry out carbon dioxide and send in and send out.
Optionally, the third conduit 15 further comprises a heating line 151, the heating line 151 being disposed at the outlet union end remote from the injection pump 18. The heating pipeline sets up in export union 12 department, can heat up the liquid carbon dioxide that will pour into the oil well into, and the liquid carbon dioxide after the intensification can not lead to the fact cold injury to the rubber of oil well wellhead and oil pipe hanger, has solved among the prior art and has leaded to the wax to separate out the problem that thereby causes the oil well to block up.
Optionally, at least two interfaces of the inlet union and the carbon dioxide liquid storage tank 20 are provided, and at least two interfaces are arranged side by side. The carbon dioxide liquid storage tank 20 comprises a gas phase valve and a liquid phase valve, and the gas is light and is usually located above the carbon dioxide liquid storage tank, so that the gas phase valve is arranged above the carbon dioxide liquid storage tank, the liquid phase valve is arranged below the liquid storage tank, a plurality of connectors can be arranged on an inlet union connected with the carbon dioxide liquid storage tank, the plurality of connectors can be simultaneously connected with the gas phase valve and the liquid phase valve of the carbon dioxide liquid storage tank, and a plurality of connectors can also be simultaneously connected with the liquid phase valve in the liquid carbon dioxide injection process to increase the liquid injection amount. Only one interface may be used, and the embodiment of the present invention is not limited herein. The number of the inlet union may be 2, 3, 4 or more, and the embodiment of the present invention is not limited herein.
Optionally, the inlet union further includes a butterfly valve 111, and the butterfly valves 111 are disposed on the plurality of ports. The butterfly valve 111 is a valve in which a closing member is a disk and is rotated about a valve axis to open and close. The structure of the butterfly valve 111 is simple, and the operation is convenient. The ports of the inlet union are each opened or closed by a butterfly valve 111.
Optionally, the inlet union further comprises a blow-off valve 112, the blow-off valve 112 being arranged on the side of the butterfly valve 111 remote from the mouthpiece. After the injection of the entire liquid carbon dioxide is stopped, the release valve 112 may be opened to discharge the carbon dioxide gas remaining in the pipeline out of the liquid carbon dioxide huff and puff device 10 through the release valve 112. Meanwhile, when the atmospheric valve is opened and the inside of the device is at a normal temperature, the liquid carbon dioxide remaining in the liquid carbon dioxide huff and puff device is gasified and discharged out of the device through the atmospheric valve 112.
Optionally, the first pipeline 13 is provided with a first stop valve 131, a first flow meter 132, a first pressure transmitter 133 and a first accumulator 134. The stop valve is a valve which makes the sealing surface of the valve clack and the sealing surface of the valve seat tightly fit by the pressure of the valve rod to prevent medium circulation, is easy to manufacture and convenient to maintain, and is not only suitable for medium and low pressure, but also suitable for high pressure. The embodiment of the present invention is to control the first stop valve 131 to block the circulation of carbon dioxide. The flowmeter is arranged on the pipeline, so that an operator can know the current flow rate of the liquid carbon dioxide in time, and the adjustment and the recording can be carried out in time. The pressure transmitter is an instrument which receives pressure variable, converts the pressure variable into a standard output signal according to a certain proportion after sensing conversion. The embodiment of the utility model provides an in, use booster pump 17 to carry out the pressure boost to gaseous state carbon dioxide and liquid carbon dioxide in the pipeline, consequently set up the pressure condition that pressure transmitter 133 can be real-time in the understanding pipeline on the pipeline, this pressure transmitter 133 can be digital pressure transmitter, also can be other pressure transmitter, the embodiment of the utility model provides a do not limit here. The accumulator is used for converting energy in the system into compression energy or potential energy to be stored at a proper time, converting the compression energy or the potential energy into hydraulic energy or air pressure and the like to be released when the system needs the energy, and replenishing the energy to the system again, and absorbing the energy when the instantaneous pressure of the system is increased so as to ensure the normal pressure of the whole system. The first accumulator 134 in the embodiment of the present invention can absorb part of the energy due to the pressure change in the first pipeline 13, so as to ensure that the pressure of the first pipeline 13 is in a normal state.
Optionally, a throttle 141 and a needle 142 are provided on the second line 14. The throttle valve is a valve for controlling the flow rate of fluid by changing the throttle section or the throttle length, and the flow rate of liquid carbon dioxide entering the injection pump can be controlled by controlling the throttle valve 141. The needle valve is a valve having a needle-shaped valve plug mainly used for adjusting the flow rate of the gas, and the flow rate of the gaseous carbon dioxide in the second pipeline 14 can be controlled by adjusting the needle valve 142. When the second conduit 14 is filled with gaseous carbon dioxide, the needle valve 142 is closed, preventing gaseous carbon dioxide from entering the injection pump.
Optionally, a second accumulator 152, a second pressure transmitter 153, a check valve 154 and a second stop valve 155 are arranged on the third pipeline 15. The injection pump 16 pressurizes the liquid carbon dioxide until the pressure of the liquid carbon dioxide is approximately equal to the pressure at the wellhead of the oil well, at which time the introduction of liquid carbon dioxide into the well can reduce the potential safety hazard due to overpressure. The second accumulator 152 is disposed at an end of the third pipeline 15 close to the injection pump 18, and the second accumulator 152 can absorb energy of the high-pressure liquid carbon dioxide coming out of the injection pump 18, so as to prevent the third pipeline 15 from being damaged by the instantaneous high pressure when the high-pressure liquid carbon dioxide is present. Meanwhile, a pressure transmitter 153 is arranged on the third pipeline 15 to display the current pressure of the pipeline. The check valve is a valve that operates by its own weight and medium pressure to block the reverse flow of the medium, and is provided in the third pipe 15 to prevent the liquid carbon dioxide from flowing back into the injection pump. The third pipeline 15 is further provided with a second stop valve 155, which can close the second stop valve 155 when the liquid carbon dioxide injection is stopped, so as to prevent the residual liquid carbon dioxide from flowing into the well head.
Optionally, the carbon dioxide huff and puff device further comprises a control assembly K, and the control assembly K is connected with the gas-liquid separation assembly, the booster pump assembly and the injection pump assembly. The control assembly can comprise a variable frequency control cabinet, the variable frequency control cabinet is mainly used for adjusting the working frequency of the equipment, reducing energy loss, stably starting the equipment and reducing the damage of large current generated when the equipment is directly started to the motor. The embodiment of the utility model provides an in the operation of control vapour and liquid separator, booster pump and heating pipeline 151 through the variable frequency control cabinet. The control component may also be other apparatuses that can control the operation of other components, and the embodiments of the present invention are not limited herein.
To sum up, the embodiment of the utility model provides an including importing and exporting subassembly, pipeline subassembly, gas-liquid separation subassembly, booster pump subassembly and the liquid carbon dioxide device of taking in and send out of pouring into the pump subassembly, wherein import and export the subassembly including import union and export union, import union is connected with the carbon dioxide liquid storage pot, exports the union and is connected with the well head. The pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline, one end of the first pipeline is connected with the gas-liquid separation assembly, the other end of the first pipeline is connected with the injection pump assembly, one end of the second pipeline is connected with the inlet union, the other end of the second pipeline is connected with the injection pump assembly, one end of the third pipeline is connected with the injection pump assembly, and the other end of the third pipeline is connected with the outlet union; the gas-liquid separation assembly comprises a gas-liquid separator, and a first gas-liquid inlet, a first gas outlet and a first liquid outlet which are arranged on the gas-liquid separator, the first gas-liquid inlet is connected with the inlet union, the first liquid outlet is connected with the booster pump assembly, and the first gas outlet is configured to discharge gas in the gas-liquid separator; the booster pump assembly comprises a booster pump, and a second gas-liquid inlet, a second gas outlet and a second liquid outlet which are arranged on the booster pump, wherein the second gas-liquid inlet is connected with the first liquid outlet, the second gas outlet is connected with the first pipeline, and the second liquid outlet is connected with the second pipeline; the injection pump assembly comprises an injection pump, a third liquid inlet, a third gas outlet and a third liquid outlet, the third liquid inlet, the third gas outlet and the third liquid outlet are arranged on the injection pump, the third liquid inlet is connected with one end, far away from the inlet union, of the second pipeline, the third gas outlet is connected with one end, far away from the gas-liquid separator, of the first pipeline, and the third liquid outlet is connected with one end, far away from the outlet union, of the third pipeline. The gas-liquid separator can circulate exhaust and continuously inject carbon dioxide into the well outside the pipeline, the booster pump and the gas discharge device in the injection pump, so that the problem that the injection amount of liquid carbon dioxide is reduced because gaseous carbon dioxide can cause certain damage to the injection pump in the related technology is solved, and the effect of improving the injection amount of carbon dioxide is achieved.
Taking fig. 2 as an example, the steps when injecting liquid carbon dioxide into a well by using the liquid carbon dioxide huff and puff device 10 provided by the present invention may include:
1) injecting gaseous carbon dioxide into the pipeline and pressurizing.
The gas phase valve of the carbon dioxide storage tank is opened, the butterfly valve 111 on the inlet union is opened, the first stop valve 131 on the first pipeline 13 and the throttle valve 141 on the second pipeline 14 are opened, and gaseous carbon dioxide enters the first pipeline 13, the second pipeline 14 and the gas-liquid separator 16 through the inlet union. The needle valve 142 on the second line 14 and the second stop valve 155 on the third line 15 are closed, blocking gaseous carbon dioxide from entering the injection pump 18 and the outlet union 12.
After the pipe assembly and the gas-liquid separator 16 are filled with the gaseous carbon dioxide, the booster pump 17 is turned on to maintain the pressure at about 2.5MPa, thereby preventing the liquid carbon dioxide from being gasified or undergoing phase change when entering the liquid carbon dioxide aeration device 10.
2) Liquid carbon dioxide is injected while gaseous carbon dioxide is discharged.
The liquid phase valve of the carbon dioxide storage tank 20 is opened, the liquid carbon dioxide enters the second pipeline 14 and the gas-liquid separator 16 from the inlet union, the needle valve 142 is opened, the gaseous carbon dioxide in the second pipeline 14 enters the first pipeline 13 through the needle valve 142, and the gaseous carbon dioxide is discharged from the device through the first gas outlet 162 in the gas-liquid separator 16 connected to the first pipeline 13. The same gas in the first conduit 13 and the gas-liquid separator 16 is also discharged from the first gas outlet 162 at the same time. The liquid carbon dioxide entering the gas-liquid separator 16 is discharged from the first liquid outlet 163, enters the booster pump 17 through the second gas-liquid inlet 171, enters the second pipe 14 through the second liquid outlet 173, and enters the injection pump 18 through the third liquid inlet 181 as well as the liquid carbon dioxide in the second pipe 14. A small amount of gaseous carbon dioxide generated in the booster pump 17 at this time enters the first pipe 13 through the second gas outlet 172, and enters the gas-liquid separator 16 from the first pipe 13 to be discharged from the first gas outlet 162.
3) Pressurizing and heating the liquid carbon dioxide.
The injection pump 18 pressurizes the liquid carbon dioxide, the pressure of which is usually increased to about 25MPa, and the pressurized high-pressure liquid carbon dioxide enters the third pipeline 15 from the third liquid outlet 183 and is heated and warmed by the heating pipeline 151 when approaching the outlet union 12. During the pressurization process, gaseous carbon dioxide generated in the injection pump 18 enters the first pipe 13 through the third gas outlet 182, and enters the gas-liquid separator 16 from the first pipe 13, and is discharged from the first gas outlet 162. That is, during the entire process of injecting the liquid carbon dioxide and pressurizing the liquid carbon dioxide, the generated gaseous carbon dioxide can be discharged from the first gas outlet 162, forming a gas circulation.
4) And discharging high-temperature and high-pressure carbon dioxide into the well.
The pressurized and heated liquid carbon dioxide generates certain gaseous carbon dioxide, and at the moment, the carbon dioxide gas-liquid mixture is simultaneously injected into the well. The pressure is equivalent to the pressure of a well head, and potential safety hazards caused by overhigh pressure of an injection pump in the prior art can not be generated. The heated carbon dioxide is injected into the well, so that the problem of cold damage in the prior art can not be caused to the well shaft. And all the liquid carbon dioxide passes through the injection pump 18, so that the injection amount of the liquid carbon dioxide is increased, and the throughput of the carbon dioxide is improved.
5) And closing a liquid phase valve of the carbon dioxide liquid storage tank, closing the control assembly and opening the emptying valve.
The closing control component is to close the injection pump 18, the booster pump 17 and the heating pipeline 151, stop the operation of the liquid carbon dioxide huff and puff device 10, open the blow valve 112, at this time, the liquid carbon dioxide remained in the device is gasified at normal temperature, and is slowly discharged from the blow valve 112 together with the gaseous carbon dioxide remained in the pipeline component, thereby completing the cleaning of the interior of the liquid carbon dioxide huff and puff device 10.
In the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The above description is only an alternative embodiment of the present invention, and is not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A liquid carbon dioxide aeration device, comprising:
the device comprises an inlet and outlet assembly, a pipeline assembly, a gas-liquid separation assembly, a booster pump assembly and an injection pump assembly;
the inlet and outlet assembly comprises an inlet union and an outlet union, the inlet union is connected with the carbon dioxide liquid storage tank, and the outlet union is connected with a wellhead;
the pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline, one end of the first pipeline is connected with the gas-liquid separation assembly, the other end of the first pipeline is connected with the injection pump assembly, one end of the second pipeline is connected with the inlet union, the other end of the second pipeline is connected with the injection pump assembly, one end of the third pipeline is connected with the injection pump assembly, and the other end of the third pipeline is connected with the outlet union;
the gas-liquid separation assembly comprises a gas-liquid separator, and a first gas-liquid inlet, a first gas outlet and a first liquid outlet which are arranged on the gas-liquid separator, the first gas-liquid inlet is connected with the inlet union, the first liquid outlet is connected with the booster pump assembly, and the first gas outlet is configured to discharge gas in the gas-liquid separator;
the booster pump assembly comprises a booster pump, and a second gas-liquid inlet, a second gas outlet and a second liquid outlet which are arranged on the booster pump, wherein the second gas-liquid inlet is connected with the first liquid outlet, the second gas outlet is connected with the first pipeline, and the second liquid outlet is connected with the second pipeline;
the injection pump assembly comprises an injection pump, a third liquid inlet, a third gas outlet and a third liquid outlet, wherein the third liquid inlet, the third gas outlet and the third liquid outlet are arranged on the injection pump, the third liquid inlet is connected with one end, far away from the inlet union, of the second pipeline, the third gas outlet is connected with one end, far away from the gas-liquid separator, of the first pipeline, and the third liquid outlet is connected with one end, far away from the outlet union, of the third pipeline.
2. The liquid carbon dioxide throughput device of claim 1, further comprising a moving plate,
the inlet and outlet assembly, the pipeline assembly, the gas-liquid separation assembly, the booster pump assembly and the injection pump assembly are all arranged on the moving plate.
3. The liquid carbon dioxide throughput device of claim 1, wherein the third line further comprises a heated line disposed at the outlet union end remote from the injection pump.
4. The liquid carbon dioxide throughput device of claim 1, wherein the number of said inlet union and said carbon dioxide reservoir are at least two, and said at least two ports are arranged side by side.
5. The liquid carbon dioxide throughput device of claim 4, wherein the inlet union further comprises a butterfly valve, the butterfly valve being disposed on each of the plurality of ports.
6. The liquid carbon dioxide throughput device of claim 5, wherein said inlet union further comprises a vent valve, said vent valve being disposed on a side of said butterfly valve remote from said interface.
7. The liquid carbon dioxide throughput device according to claim 1, wherein the first pipeline is provided with a first stop valve, a first flow meter, a first pressure transmitter and a first accumulator.
8. The liquid carbon dioxide throughput device of claim 1, wherein a throttle valve and a needle valve are disposed on the second pipeline.
9. The liquid carbon dioxide throughput device of claim 1, wherein a second accumulator, a second pressure transmitter, a check valve and a second stop valve are disposed on the third pipeline.
10. The liquid carbon dioxide huff and puff apparatus according to claim 1, further comprising a control assembly coupled to the gas-liquid separation assembly, the booster pump assembly, and the injection pump assembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921187556.0U CN210977424U (en) | 2019-07-25 | 2019-07-25 | Liquid carbon dioxide huff and puff device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921187556.0U CN210977424U (en) | 2019-07-25 | 2019-07-25 | Liquid carbon dioxide huff and puff device |
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| CN210977424U true CN210977424U (en) | 2020-07-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115574261A (en) * | 2022-09-23 | 2023-01-06 | 上海凯士比泵有限公司 | Carbon dioxide pressurizing and conveying device, online monitoring system thereof and mobile unit |
| CN118653815A (en) * | 2024-06-20 | 2024-09-17 | 江苏诚创智能装备有限公司 | Carbon dioxide booster pump sledge |
-
2019
- 2019-07-25 CN CN201921187556.0U patent/CN210977424U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115574261A (en) * | 2022-09-23 | 2023-01-06 | 上海凯士比泵有限公司 | Carbon dioxide pressurizing and conveying device, online monitoring system thereof and mobile unit |
| CN118653815A (en) * | 2024-06-20 | 2024-09-17 | 江苏诚创智能装备有限公司 | Carbon dioxide booster pump sledge |
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