CN211692423U - Ground foam injection device based on Venturi effect - Google Patents
Ground foam injection device based on Venturi effect Download PDFInfo
- Publication number
- CN211692423U CN211692423U CN202020235689.7U CN202020235689U CN211692423U CN 211692423 U CN211692423 U CN 211692423U CN 202020235689 U CN202020235689 U CN 202020235689U CN 211692423 U CN211692423 U CN 211692423U
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- pipeline
- venturi
- injection pipeline
- foaming
- foam
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Abstract
The utility model belongs to the technical field of oil field development, a foam flooding, foam fracturing site operation ground foaming problem is related to. The ground foam injection device based on the Venturi effect comprises an injection pipeline and an output pipeline which are respectively connected with a Venturi foam generator, wherein the output pipeline is connected with a wellhead; the injection pipeline comprises a foaming gas injection pipeline and a foaming agent injection pipeline, and the foaming gas injection pipeline and the foaming agent injection pipeline are both connected with the Venturi foam generator; the Venturi foam generator comprises an inlet pipe, a contraction pipe, a throat, a diffusion pipe and an outlet pipe which are connected in sequence; the foaming agent injection pipeline is connected with the inlet pipe, the foaming agent injection pipeline is provided with an injection pump, and the outlet pipe is connected with the output pipeline; a three-dimensional reticular porous medium is arranged in the throat; the contraction tube and the diffusion tube are both conical tubes. The utility model discloses need not the automatic even fast mixed gas-liquid of external power, carry out ground foaming.
Description
Technical Field
The utility model belongs to the technical field of oil field development, a foam flooding, foam fracturing site operation ground foaming problem is related to.
Background
The foam flooding is a tertiary oil recovery method for improving the recovery rate under the condition of high water content in the later stage of oil field development, integrates the advantages of gas flooding and chemical flooding, and utilizes the foam plugging effect to enlarge the water injection swept volume and improve the oil displacement efficiency and the recovery rate. Air foam flooding, nitrogen foam flooding, carbon dioxide foam flooding and the like are all technologies with great potential for improving the recovery ratio of crude oil.
Foam fracturing is a fracturing fracture-making and reservoir transformation mode different from common hydraulic fracturing. The foam fracturing has the advantages of low filtration loss, strong flowback capability, good compatibility with formation fluid and the like, and the damage of fracturing fluid to the formation can be reduced by adopting the foam fracturing technology.
For foam flooding and foam fracturing, a ground mixed foaming mode is required to be adopted for foaming during on-site injection construction. The gas source is generally provided by a compressor, the foaming agent solution is provided by a pump, and the gas and the foaming agent solution are mixed and foamed in a tee joint or a foaming device.
Disclosure of Invention
The utility model aims at providing a ground foam injection device based on venturi effect.
The technical scheme of the utility model lies in:
the ground foam injection device based on the Venturi effect comprises an injection pipeline and an output pipeline which are respectively connected with a Venturi foam generator, wherein the output pipeline is connected with a wellhead; the injection pipeline comprises a foaming gas injection pipeline and a foaming agent injection pipeline, and the foaming gas injection pipeline and the foaming agent injection pipeline are both connected with the Venturi foam generator; the Venturi foam generator comprises an inlet pipe, a contraction pipe, a throat, a diffusion pipe and an outlet pipe which are connected in sequence; the foaming agent injection pipeline is connected with the inlet pipe, the foaming agent injection pipeline is provided with an injection pump, and the outlet pipe is connected with the output pipeline; a three-dimensional reticular porous medium is arranged in the throat; the contraction tube and the diffusion tube are both conical tubes.
And the foaming gas injection pipeline and the foaming agent injection pipeline are both provided with a pressure gauge and a flow regulating valve.
Bypass pipelines are further arranged at two ends of the Venturi foam generator, bypass valves are arranged on the bypass pipelines, and stop valves are arranged on pipelines between the two ends of the Venturi foam generator and the connecting ends of the bypass pipelines.
And a filter is arranged at the joint of the foaming gas injection pipeline and the inlet pipe.
And stop valves are arranged on the foaming agent injection pipeline and the foaming agent output pipeline.
The technical effects of the utility model reside in that:
the utility model has simple structure, convenient connection, high efficiency and energy saving; the gas and the liquid are automatically mixed at uniform speed without external power, and ground foaming is carried out.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the venturi foam generator of the present invention.
Reference numerals: 1-Venturi foam generator, 2-injection pump, 3-stop valve, 4-bypass valve, 5-wellhead, 6-inlet pipe, 7-shrinkage pipe, 8-throat, 9-diffusion pipe, 10-outlet pipe, 11-foaming gas injection pipeline, 12-foaming agent injection pipeline and 13-output pipeline.
Detailed Description
Example 1
The ground foam injection device based on the Venturi effect comprises an injection pipeline and an output pipeline 13 which are respectively connected with the Venturi foam generator 1, wherein the output pipeline 13 is connected with a wellhead 5; the injection pipeline comprises a foaming gas injection pipeline 11 and a foaming agent injection pipeline 12, and the foaming gas injection pipeline 11 and the foaming agent injection pipeline 12 are both connected with the Venturi foam generator 1; the Venturi foam generator 1 comprises an inlet pipe 6, a contraction pipe 7, a throat 8, a diffusion pipe 9 and an outlet pipe 10 which are connected in sequence; wherein, the foaming gas injection pipeline 11 is connected with the throat 8, the foaming agent injection pipeline 12 is connected with the inlet pipe 6, the foaming agent injection pipeline 12 is provided with the injection pump 2, and the outlet pipe 10 is connected with the output pipeline 13; a three-dimensional reticular porous medium is arranged in the throat 8; the contraction tube 7 and the diffusion tube 9 are both conical tubes.
The specific implementation process of the embodiment is as follows: the injection pump 2 is turned on and the blowing agent flows through the venturi foam generator 1 at a certain flow rate. According to the Bernoulli equation, due to the special structure that the section of the contraction pipe 7 is contracted, the flow velocity of the foaming agent at the throat 8 is increased, and the pressure is reduced; when the pressure is less than the pressure of the foaming gas, the foaming gas is self-sucked into the throat 8; meanwhile, a foaming agent is injected into the inlet pipe 6 through the foaming agent injection pipeline 12, passes through the contraction pipe 7 and is uniformly mixed with foaming gas at a throat 8 at a high speed; the throat 8 is internally provided with a three-dimensional reticular porous medium which is used as a carrier for gas-liquid mixing, so that the foaming gas and the foaming agent can be fully mixed and then efficiently foamed on the internal interface to form foam. After the foaming process is completed, the foam is discharged through the diffusion pipe 9 and the output pipeline 13 in sequence and enters the wellhead 5. The foaming gas is generally air or nitrogen.
Example 2
On the basis of embodiment 1, the method further comprises the following steps: the foaming gas injection pipeline 11 and the foaming agent injection pipeline 12 are both provided with a pressure gauge and a flow regulating valve; for adjusting the ratio of foaming gas to foaming agent.
Example 3
On the basis of embodiment 2, the method further comprises the following steps: bypass pipelines are further arranged at two ends of the Venturi foam generator 1, a bypass valve 4 is arranged on each bypass pipeline, and a stop valve 3 is arranged on a pipeline between the two ends of the Venturi foam generator 1 and the connecting end of each bypass pipeline; when the venturi foam generator 1 needs to be overhauled, the stop valves 3 at two ends of the venturi foam generator 1 are closed, the venturi foam generator 1 is convenient to assemble and disassemble, and the bypass valve 4 is opened simultaneously, so that surfactant flooding is convenient to implement.
Example 4
On the basis of embodiment 3, the method further comprises the following steps: the connection of the foaming gas injection pipe 11 and the inlet pipe 6 is provided with a filter for filtering mechanical impurities in the foaming gas.
Claims (4)
1. The ground foam injection device based on the Venturi effect comprises an injection pipeline and an output pipeline (13) which are respectively connected with a Venturi foam generator (1), wherein the output pipeline (13) is connected with a wellhead (5); the injection pipeline comprises a foaming gas injection pipeline (11) and a foaming agent injection pipeline (12), and the foaming gas injection pipeline (11) and the foaming agent injection pipeline (12) are both connected with the Venturi foam generator (1); the method is characterized in that: the Venturi foam generator (1) comprises an inlet pipe (6), a contraction pipe (7), a throat (8), a diffusion pipe (9) and an outlet pipe (10) which are connected in sequence; wherein, the foaming gas injection pipeline (11) is connected with the throat (8), the foaming agent injection pipeline (12) is connected with the inlet pipe (6), the foaming agent injection pipeline (12) is provided with an injection pump (2), and the outlet pipe (10) is connected with the output pipeline (13); a three-dimensional reticular porous medium is arranged in the throat (8); the contraction tube (7) and the diffusion tube (9) are both conical tubes.
2. The venturi-based ground foam injection apparatus of claim 1, wherein: and a pressure gauge and a flow regulating valve are arranged on the foaming gas injection pipeline (11) and the foaming agent injection pipeline (12).
3. The venturi-based ground foam injection apparatus of claim 1, wherein: venturi foam generator (1) both ends still are equipped with bypass line, be equipped with bypass valve (4) on the bypass line, be equipped with stop valve (3) on the pipeline between venturi foam generator (1) both ends and bypass line's the link.
4. The venturi-based ground foam injection apparatus of claim 1, wherein: and a filter is arranged at the joint of the foaming gas injection pipeline (11) and the inlet pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020235689.7U CN211692423U (en) | 2020-03-02 | 2020-03-02 | Ground foam injection device based on Venturi effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020235689.7U CN211692423U (en) | 2020-03-02 | 2020-03-02 | Ground foam injection device based on Venturi effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211692423U true CN211692423U (en) | 2020-10-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020235689.7U Expired - Fee Related CN211692423U (en) | 2020-03-02 | 2020-03-02 | Ground foam injection device based on Venturi effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211692423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356809A (en) * | 2021-06-03 | 2021-09-07 | 中国石油大学(华东) | Device and method for generating micro-bubbles for oil displacement |
-
2020
- 2020-03-02 CN CN202020235689.7U patent/CN211692423U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356809A (en) * | 2021-06-03 | 2021-09-07 | 中国石油大学(华东) | Device and method for generating micro-bubbles for oil displacement |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201016 Termination date: 20210302 |
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| CF01 | Termination of patent right due to non-payment of annual fee |