CN219774112U - Oil removal and pressure stabilization device for wellhead of gathering and transportation oil extraction well - Google Patents
Oil removal and pressure stabilization device for wellhead of gathering and transportation oil extraction well Download PDFInfo
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- CN219774112U CN219774112U CN202321337118.4U CN202321337118U CN219774112U CN 219774112 U CN219774112 U CN 219774112U CN 202321337118 U CN202321337118 U CN 202321337118U CN 219774112 U CN219774112 U CN 219774112U
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- 230000006641 stabilisation Effects 0.000 title claims abstract description 12
- 238000011105 stabilization Methods 0.000 title claims abstract description 12
- 238000000605 extraction Methods 0.000 title claims description 4
- 239000007788 liquid Substances 0.000 claims abstract description 64
- 239000003921 oil Substances 0.000 claims abstract description 40
- 238000000926 separation method Methods 0.000 claims abstract description 40
- 238000011084 recovery Methods 0.000 claims abstract description 14
- 239000003129 oil well Substances 0.000 claims abstract description 12
- 239000010779 crude oil Substances 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 49
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
The utility model relates to the field of oil-gas-water separation of oil fields, which is applied to the condition that crude oil at the wellhead of an oil well intermittently overflows from a casing pipe due to pressure imbalance in a collection and transportation area, and is particularly suitable for low-pressure low-permeability oil fields; in particular to a wellhead oil removal and pressure stabilization device for an oil recovery well. The oil removing and pressure stabilizing device comprises a column type cyclone separation system and a self-operated gas-liquid separation device which are sequentially connected, wherein the inlet end of the column type cyclone separation system is connected to an oil well sleeve to produce associated gas, the outlet end of the self-operated gas-liquid separation device is respectively provided with a gas path outlet and a liquid path outlet, the gas path outlet is connected with a gas path manifold, and the liquid path outlet is connected with a liquid path manifold. The utility model adopts the column type cyclone separation system to carry out cyclone separation and is matched with the self-operated gas-liquid separation device, so that the gas-liquid separation can be completely realized.
Description
Technical Field
The utility model relates to the field of oil-gas-water separation of oil fields, which is applied to the condition that crude oil at the wellhead of an oil well intermittently overflows from a casing pipe due to pressure imbalance in a collection and transportation area, and is particularly suitable for low-pressure low-permeability oil fields; in particular to a wellhead oil removal and pressure stabilization device for an oil recovery well.
Background
All gases naturally occurring in nature are called natural gas, and various gases formed through natural processes in the atmosphere, the water ring and the rock ring, including oilfield gas, gas field gas, mud-fire mountain gas, coal bed gas and the like. Natural gas contains no carbon monoxide, is lighter than air, can diffuse upwards quickly if leaked, is very safe compared with other fuel bodies, and is a high-quality living fuel and chemical raw material.
Natural gas is also produced during the production of oil fields, which we often refer to as oilfield associated gas. The method for collecting the oilfield associated gas is to concentrate the scattered associated gas by utilizing the pipe network, collect various terrains, determine the laying of the collection pipe network according to specific conditions, and the good collection of the oilfield associated gas can improve the effective utilization rate of resources and can be used for heating, power generation or other various purposes.
The recovery and utilization of associated gas by the gathering and transportation pipe network also has a plurality of problems in the field implementation process, such as unstable gas quantity, condensate oil component or liquid component and water content, wherein the most troublesome is intermittent and irregular oil injection of wellhead casings caused by unbalanced pressure of the gathering and transportation pipe network. Particularly for a wellhead skid-mounted associated gas recovery device, once oil is injected into an air inlet, the recovery effect is affected by light oil injection, and equipment failure and even scrapping are caused by heavy oil injection.
According to the related study, the problems are more likely to occur in the production of low-yield low-pressure oil wells.
The problem that carbon dioxide is extracted along with associated gas can be avoided in the carbon dioxide injection area, so that the recycling of the associated gas is a necessary step. Therefore, in order to smoothly recycle associated gas, the problem that the associated gas recycling device cannot work normally due to oil injection at a wellhead is solved, and the wellhead oil removal pressure stabilizing device for the oil recovery well is needed to be provided.
Disclosure of Invention
The utility model aims to solve the problem that the associated gas recovery device cannot work normally due to oil injection at the wellhead, and provides an oil removal and pressure stabilization device for the wellhead of an oil extraction well.
The technical scheme of the utility model is as follows:
the oil removal and pressure stabilization device comprises a column type cyclone separation system and a self-operated gas-liquid separation device which are sequentially connected, wherein the inlet end of the column type cyclone separation system is connected to an oil well sleeve to produce associated gas, the outlet end of the self-operated gas-liquid separation device is respectively provided with a gas path outlet and a liquid path outlet, the gas path outlet is connected with a gas path manifold, and the liquid path outlet is connected with a liquid path manifold;
the column type cyclone separation system comprises a vertical pipe and an elbow pipe, and the included angle between the vertical pipe and the elbow pipe is smaller than 90 degrees; the inlet end of the vertical pipe is connected to the oil well casing pipe for extracting associated gas, and the outlet end of the bent pipe is inserted into the self-operated gas-liquid separation device;
the self-operated gas-liquid separation device comprises an inner tank body and an outer tank body which are arranged in a stacked manner, wherein a first lifting device is arranged in the outer tank body and is in sliding connection with the outer tank body and is fixedly connected with the inner tank body; the top end of the outer tank body is provided with a connecting cavity, the connecting cavity is provided with a gas path outlet, and the bottom of the outer tank body is provided with a liquid path outlet;
the connecting cavity is internally and horizontally provided with a baffle, the center of the baffle is inserted into a vertically arranged pipeline, the top end of the pipeline is higher than the baffle, and the bottom end of the pipeline sequentially penetrates through the outer tank body and the inner tank body to extend into the inner tank body; the connecting cavity is internally provided with a self-operated lifting switch, the self-operated lifting switch comprises a baffle plate which is horizontally arranged and a connecting rod which is vertically connected to the bottom surface of the baffle plate, the width of the baffle plate is larger than that of the pipeline, and the bottom end of the connecting rod is connected to the bottom end of the inner tank body;
holes are formed in the side walls of the inner tank body and the outer tank body, and the length of each hole is equal to the sum of the distance from the baffle plate to the baffle plate and the outer diameter of the bent pipe; the inner tank body is internally provided with a sliding block which is in sliding connection with the side wall of the inner tank body, the center of the sliding block is communicated with the bent pipe, and the length of the sliding block is 2 times of the length of the hole;
the air path manifold is provided with a pressure detection device and a pneumatic ball valve; the pressure detection device is electrically connected with the pneumatic ball valve.
The inner tank body is also internally provided with a second lifting device which is fixedly connected with the outer wall of the inner tank body and is in sliding connection with the inner wall of the outer tank body.
The baffle plate is provided with a downward lug at the edge of the part of the bottom beyond the outer diameter of the pipeline, and the height of the lug is smaller than the distance from the baffle plate to the baffle plate.
The gas path manifold is connected with an associated gas recycling device, and the liquid path manifold is connected with a crude oil gathering and transportation manifold.
The pressure detection device is a pressure gauge.
The bottom of the inner tank body is provided with an inner tank body liquid outlet, the bottom of the outer tank body is provided with an outer tank body liquid outlet, and the outer tank body liquid outlet is connected to a liquid path manifold.
The utility model has the technical effects that:
(1) According to the utility model, the column type cyclone separation system is adopted for cyclone separation, and the self-operated gas-liquid separation device is matched, so that the gas-liquid separation can be completely realized;
(2) According to the utility model, the pressure detection device is arranged on the gas path outlet manifold of the column type cyclone separation system, the protection pressure is set, and the pneumatic ball valve is automatically closed when the pressure rises, so that the associated gas recycling device connected with the gas path outlet manifold is protected, the intermittent oil injection problem of a wellhead is solved, and the service life and the separation efficiency of the associated gas recycling device are obviously improved;
(3) The utility model recycles the extracted oilfield associated gas, 30000 yuan per ton of methane and 3000 yuan per ton of light hydrocarbon, 300 yuan per ton of carbon dioxide, can be used for oilfield oil displacement, and can improve the recovery ratio by 5% -10%.
Drawings
Fig. 1 is a schematic diagram of structural connection of a wellhead oil removal and pressure stabilization device for an oil recovery well.
Reference numerals: 1. the oil well casing pipe produces associated gas; 2. a column type cyclone separation system; 3. a self-operated gas-liquid separation device; 4. a pressure detection device; 5. pneumatic ball valves; 6. an air path manifold; 7. a liquid path manifold; 8. an inner tank; 9. a connecting rod; 10. a first lifting device; 11. a second lifting device; 12. a partition plate; 13. a baffle; 14. a liquid outlet of the inner tank body; 15. a pipe; 16. an outer tank.
Detailed Description
Example 1
The oil removal and pressure stabilization device comprises a column type cyclone separation system 2 and a self-operated gas-liquid separation device 3 which are sequentially connected, wherein the inlet end of the column type cyclone separation system 2 is connected to an oil well sleeve to produce associated gas 1, the outlet end of the self-operated gas-liquid separation device 3 is respectively provided with a gas path outlet and a liquid path outlet, the gas path outlet is connected with a gas path manifold 6, and the liquid path outlet is connected with a liquid path manifold 7;
the column type cyclone separation system 2 comprises a vertical pipe and an elbow pipe, and the included angle between the vertical pipe and the elbow pipe is smaller than 90 degrees; the inlet end of the vertical pipe is connected to the oil well casing pipe for producing associated gas 1, and the outlet end of the bent pipe is inserted into the self-operated gas-liquid separation device 3;
the self-operated gas-liquid separation device 3 comprises an inner tank body 8 and an outer tank body 16 which are arranged in a stacked manner, wherein a first lifting device 10 is arranged in the outer tank body 16, and the first lifting device 10 is in sliding connection with the outer tank body 16 and is fixedly connected with the inner tank body 8; the top end of the outer tank 16 is provided with a connecting cavity, the connecting cavity is provided with an air path outlet, and the bottom of the outer tank 16 is provided with a liquid path outlet;
the connecting cavity is horizontally provided with a partition plate 12, a vertically arranged pipeline 15 is inserted into the center of the partition plate 12, the top end of the pipeline 15 is higher than the partition plate 12, and the bottom end of the pipeline 15 sequentially penetrates through the outer tank 16 and the inner tank 8 to extend into the inner tank 8; the connecting cavity is internally provided with a self-operated lifting switch, the self-operated lifting switch comprises a baffle 13 which is horizontally arranged and a connecting rod 9 which is vertically connected to the bottom surface of the baffle, the width of the baffle 13 is larger than that of a pipeline 15, and the bottom end of the connecting rod 9 is connected to the bottom end of the inner tank body 8;
holes are formed in the side walls of the inner tank body 8 and the outer tank body 16, and the lengths of the holes are equal to the sum of the distance from the baffle 13 to the baffle 12 and the outer diameter of the bent pipe; a sliding block which is in sliding connection with the side wall of the inner tank body 8 is arranged in the inner tank body 8, the center of the sliding block is communicated with the bent pipe, and the length of the sliding block is 2 times of the length of the hole;
the air channel manifold 6 is provided with a pressure detection device 4 and a pneumatic ball valve 5; the pressure detection device 4 is electrically connected with the pneumatic ball valve 5.
The specific implementation process of the embodiment is as follows:
the gas-liquid mixture in the associated gas enters a column type cyclone separation system 2, and the recovery scale of the associated gas 1 produced by the oil well casing is 240Nm 3 And/d, the gas-oil ratio is 50-200, the working pressure of the inlet end 1 is 0.5MPa, and the average temperature is 30 ℃. Primarily separating gas and liquid by rotational flow and gravity; the passing speed of the separated gas is greater than that of the liquid, so that the gas firstly enters the inner tank body 8, the self-operated lifting switch is in an open state at the beginning, the gas flows to the gas path outlet through the self-operated lifting switch, and enters the gas path manifold 6 after being detected to be normal by the pressure detection device 4; the separated liquid then enters the inner tank body 8, and the inner tank body 8 moves downwards along with gravity along with the increase of the liquid, the first lifting device 10 is driven to move downwards along the outer tank body 16, meanwhile, the inner tank body 8 moves downwards to drive the connecting rod 9 to move downwards so that the baffle 13 moves downwards until the self-operated lifting switch is completely closed (the baffle 13 is in contact with the baffle 12), and the liquid in the inner tank body 8 is discharged by opening the liquid path outlet;
the liquid is emptied, the first lifting device 10 is lifted along with the self weight of the inner tank body 8, the self-operated lifting switch is opened, and then the process is continuously repeated;
in addition, if the self-operated lifting switch is not completely closed, liquid rapidly enters the gas path manifold 6 along with the pressure through the self-operated lifting switch, at the moment, the pressure detection device 4 detects abnormality, the pneumatic ball valve 5 is rapidly closed, the liquid path outlet is manually opened to drain liquid, and the pneumatic ball valve 5 is re-opened after the liquid draining is completed, so that normal operation is started.
Example 2
On the basis of the embodiment 1, the method further comprises the following steps:
the second lifting device 11 is further arranged in the outer tank 16, and the second lifting device 11 is fixedly connected with the outer wall of the inner tank 8 and is in sliding connection with the inner wall of the outer tank 16; the inner tank 8 moves and drives the first lifting device 10 and the second lifting device 11 to move.
Example 3
On the basis of embodiment 2, further comprising:
the part of the baffle 13 beyond the outer diameter of the pipe 15 is provided with a downward projection at the bottom edge, the height of which projection is smaller than the distance from the baffle 13 to the partition 12. The inner tank 8 moves downwards to drive the connecting rod 9 to move downwards and the baffle 13 to move downwards until the self-operated lifting switch is completely closed (the convex block is contacted with the baffle 12).
Example 4
On the basis of embodiment 3, further comprising:
the gas path manifold 6 is connected with an associated gas recycling device, and the liquid path manifold 7 is connected with a crude oil gathering and transportation manifold.
The pressure detection device 4 is a pressure gauge;
the bottom of the inner tank body 8 is provided with an inner tank body liquid outlet 14, the bottom of the outer tank body 16 is provided with an outer tank body liquid outlet, and the outer tank body liquid outlet is connected to the liquid path manifold 7.
Claims (6)
1. The oil removal and pressure stabilization device comprises a column type cyclone separation system (2) and a self-operated gas-liquid separation device (3) which are sequentially connected, wherein the inlet end of the column type cyclone separation system (2) is connected to an oil well casing pipe to produce associated gas (1), the outlet end of the self-operated gas-liquid separation device (3) is respectively provided with a gas path outlet and a liquid path outlet, the gas path outlet is connected with a gas path manifold (6), and the liquid path outlet is connected with a liquid path manifold (7); the method is characterized in that:
the column type cyclone separation system (2) comprises a vertical pipe and an elbow pipe, and an included angle between the vertical pipe and the elbow pipe is smaller than 90 degrees; the inlet end of the vertical pipe is connected to the oil well casing pipe for producing associated gas (1), and the outlet end of the bent pipe is inserted into the self-operated gas-liquid separation device (3);
the self-operated gas-liquid separation device (3) comprises an inner tank body (8) and an outer tank body (16) which are arranged in a stacked manner, a first lifting device (10) is arranged in the outer tank body (16), and the first lifting device (10) is in sliding connection with the outer tank body (16) and is fixedly connected with the inner tank body (8); the top end of the outer tank body (16) is provided with a connecting cavity, the connecting cavity is provided with a gas path outlet, and the bottom of the outer tank body (16) is provided with a liquid path outlet;
the connecting cavity is horizontally provided with a partition board (12), the center of the partition board (12) is inserted into a vertically arranged pipeline (15), the top end of the pipeline (15) is higher than the partition board (12), and the bottom end of the pipeline (15) sequentially penetrates through the outer tank body (16) and the inner tank body (8) to extend into the inner tank body (8); the connecting cavity is internally provided with a self-operated lifting switch, the self-operated lifting switch comprises a baffle plate (13) which is horizontally arranged and a connecting rod (9) which is vertically connected to the bottom surface of the baffle plate, the width of the baffle plate (13) is larger than that of a pipeline (15), and the bottom end of the connecting rod (9) is connected to the bottom end of the inner tank body (8);
holes are formed in the side walls of the inner tank body (8) and the outer tank body (16), and the length of each hole is equal to the sum of the distance from the baffle plate (13) to the baffle plate (12) and the outer diameter of the bent pipe; a sliding block which is in sliding connection with the side wall of the inner tank body (8) is arranged in the inner tank body (8), the center of the sliding block is communicated with the bent pipe, and the length of the sliding block is more than 2 times of the length of the hole;
the air path manifold (6) is provided with a pressure detection device (4) and a pneumatic ball valve (5); the pressure detection device (4) is electrically connected with the pneumatic ball valve (5).
2. The oil removal and pressure stabilization device for a wellhead of an oil recovery well according to claim 1, wherein: the inner tank body (16) is internally provided with a second lifting device (11), and the second lifting device (11) is fixedly connected with the outer wall of the inner tank body (8) and is in sliding connection with the inner wall of the outer tank body (16).
3. The oil removal and pressure stabilization device for a wellhead of an oil recovery well according to claim 2, wherein: the part of the baffle plate (13) exceeding the outer diameter of the pipeline (15) is provided with a downward lug at the bottom edge, and the height of the lug is smaller than the distance from the baffle plate (13) to the baffle plate (12).
4. The oil removal and pressure stabilization device for a wellhead of a gathering and transportation oil extraction well as claimed in claim 3, wherein: the gas path manifold (6) is connected with an associated gas recycling device, and the liquid path manifold (7) is connected with a crude oil collecting and conveying manifold.
5. The oil and pressure removal device for the wellhead of the oil recovery well is characterized in that: the pressure detection device (4) is a pressure gauge.
6. The oil and pressure removal device for the wellhead of the oil recovery well is characterized in that: the bottom of the inner tank body (8) is provided with an inner tank body liquid outlet (14), the bottom of the outer tank body (16) is provided with an outer tank body liquid outlet, and the outer tank body liquid outlet is connected to the liquid path manifold (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321337118.4U CN219774112U (en) | 2023-05-30 | 2023-05-30 | Oil removal and pressure stabilization device for wellhead of gathering and transportation oil extraction well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321337118.4U CN219774112U (en) | 2023-05-30 | 2023-05-30 | Oil removal and pressure stabilization device for wellhead of gathering and transportation oil extraction well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219774112U true CN219774112U (en) | 2023-09-29 |
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ID=88133454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321337118.4U Active CN219774112U (en) | 2023-05-30 | 2023-05-30 | Oil removal and pressure stabilization device for wellhead of gathering and transportation oil extraction well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219774112U (en) |
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2023
- 2023-05-30 CN CN202321337118.4U patent/CN219774112U/en active Active
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