CN219614952U - Oil-gas separation device - Google Patents
Oil-gas separation device Download PDFInfo
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- CN219614952U CN219614952U CN202222310602.XU CN202222310602U CN219614952U CN 219614952 U CN219614952 U CN 219614952U CN 202222310602 U CN202222310602 U CN 202222310602U CN 219614952 U CN219614952 U CN 219614952U
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Abstract
The utility model relates to the technical field of devices for oil-gas separation, and discloses an oil-gas separation device which comprises an oil layer casing extending into an oil well inner production layer from the ground, an oil pump extending into the oil layer casing from the ground, a reducing joint, a first oil pipe and a second oil pipe positioned outside the first oil pipe, wherein the oil pump is connected with the oil pump; wherein the output end of the reducer union is connected with the input end of the oil pump, the input end of the reducer union is connected with the output end of the first oil pipe, the outer wall of the first oil pipe is distributed with foam breaking structures along the length direction, the outer part of the input end of the reducer union is connected with the output end of the second oil pipe, the input end of the first oil pipe extends to the end part of the second oil pipe far away from the reducer union, the wall of the output end of the second oil pipe is provided with a plurality of first holes, the wall of the end part of the oil layer sleeve, which is far away from the reducer union, is provided with a plurality of second holes, and the fluid of the production layer can enter the oil layer sleeve through the holes of the oil pump and can flow into the first oil pipe along the broken bubble structure from the holes on the second oil pipe to finally pump out the oil pump.
Description
Technical Field
The utility model relates to the technical field of devices for oil-gas separation, in particular to an oil-gas separation device.
Background
The gas field enters the later development stage, the gas carrying capacity is weaker and weaker along with the reduction of the formation pressure, drainage and gas production are carried out by aid of drainage measures, the mechanical pumping process is mature in process, the application scale of the oil well is large, related matched measures are comprehensive, the mechanical pumping, drainage and gas production are more in application well cases, but the greatest disadvantage is that the gas-liquid ratio is high, the gas enters a pump cylinder, the pump efficiency is lower, even the pump detection operation is required by frequent airlocks, the cost of drainage and gas production is increased, and the time rate (time rate: the open well time divided by the total time) of gas well production is reduced.
In exploitation of oil gas wells and unconventional gas wells with high gas-liquid ratio, the existence of gas directly influences the efficiency of the whole pumping system, when the gas content is relatively low, the gas mainly influences the fullness of the oil pump and reduces the pump efficiency, and when the gas content is relatively high, a large amount of gas enters the oil pump, so that the probability of occurrence of the gas lock phenomenon is greatly improved, and meanwhile, the problems of sand blocking pump and the like can also occur due to the existence of solid particles such as sand grains or coal grains.
An oil-gas separation device is a device for separating crude oil produced by an oil well from associated natural gas. The oil-gas separator is arranged between the oil pump and the protector, so that free gas in the well liquid is separated from the well liquid, the liquid is sent to the oil pump, and the gas is released to the annular space of the oil pipe and the sleeve; in addition, there are long tail pipe gas-proof technologies implemented in some oil fields in recent two years, and the technology fully utilizes the difference of gas-liquid tightness, but a great part of fluid entering an oil pipe through a liquid inlet directly enters an oil pump under the condition of higher flow pressure, so that the gas-liquid separation effect is also poor.
Disclosure of Invention
The utility model aims to solve the problems of low pump efficiency and high liquid and gas production cost caused by the fact that liquid pumped into an oil pump contains a large amount of gas and the gas-liquid ratio is too high, and the problems of low pump efficiency and high liquid and gas production cost caused by the fact that the gas enters a pump barrel in the prior art.
In order to achieve the above object, the present utility model provides an oil-gas separation device comprising a casing and an oil pump extending into the casing from the upper end, wherein the device further comprises a reducer union, a first oil pipe and a second oil pipe located outside the first oil pipe; wherein the output end of the reducer union is connected with the input end of the oil pump, the input end of the reducer union is connected with the output end of the first oil pipe, the outer wall of the first oil pipe is distributed with foam breaking structures along the length direction, the outer part of the input end of the reducer union is connected with the output end of the second oil pipe, the first oil pipe extends downwards from the joint of the first oil pipe and the reducer union, the end pipe wall of the second oil pipe connected with the reducer union is provided with a first eyelet, the pipe wall of the lower end of the oil layer sleeve is provided with a second eyelet, and fluid in a production layer can enter the oil layer sleeve from the second eyelet through the suction of the oil pump, and can be pumped out of the oil pump from the first oil pipe to the reducer union along the broken bubble structure from the first eyelet on the second oil pipe.
Further, the reducer union is of a cylindrical structure with a through hole, the through hole is formed in the axis direction of the reducer union, one end, close to the oil well pump, of the reducer union is provided with internal threads, one end, far away from the oil well pump, of the reducer union is provided with external threads, and the inner wall of the through hole at the end is provided with internal threads.
Further, one end of the reducer union, which is far away from the oil pump, is connected with a sieve tube through external threads, and third holes are distributed on the periphery of the wall of the sieve tube along the axial direction.
Further, the output end of the oil pump is connected with a third oil pipe, and the third oil pipe is used for sending liquid from the oil pump out of the oil well.
Further, the bubble breaking structure is a protrusion annularly distributed on the outer surface of the first oil pipe, the protrusions are distributed along the height direction of the first oil pipe, and the size of the protrusions gradually increases from the end, connected with the reducer union, of the first oil pipe to the end, far away from the reducer union, of the first oil pipe.
Further, the end part of the second oil pipe far away from the reducer union is sealed and arranged through a plug. The plug is used for the tail end of the second oil pipe, so that the leakage of oil gas of the second oil pipe can be prevented, and the sealing effect is achieved.
Further, the diameter of the first oil pipe is in the range of 35-70mm.
Further, the diameter of the second oil pipe is 75-105mm.
Further, the diameter of the third oil pipe is in the range of 35-105mm.
Further, the outer wall of the upper end of the oil layer sleeve is sleeved with a surface layer sleeve.
Through the technical scheme, the oil-gas separation device has the advantages that:
1. the first oil pipe and the second oil pipe are connected with the input end of the reducer union, an annulus between the first oil pipe and the second oil pipe is formed below the oil pump, and fluid is forced to enter a pump barrel of the oil pump through the bottom end of the first oil pipe, so that the oil-gas fluid can flow downwards under the action of gravity in the flowing process along the first oil pipe, gas flows upwards, oil-gas separation is carried out, and larger bubbles can be broken and separated under the action of a broken bubble structure on the outer wall of the first oil pipe, so that the liquid is easier to float out, and is finally discharged through an oil layer sleeve without entering the oil pump;
2. the oil-gas separation device is convenient to design and manufacture, the reducing joint is simple in structure and low in cost, the broken foam structure of the outer wall of the first oil pipe is formed into a bulge through welding, and the oil-gas separation device is easy to realize in a construction site;
3. this oil-gas separation device oil-gas separation efficiency is high, through the first process of oil gas from the producing layer to the separation of second oil pipe, partial gas can be discharged from between oil reservoir sleeve pipe and the second oil pipe, partial gas has got into in the second oil pipe, still can continue to come up at the in-process of inflow first oil pipe tip, and then be discharged oil reservoir sleeve pipe, this is the second process of separating oil gas, this is broken under the garrulous bubble structure effect through setting up on first oil pipe outer wall, thereby the liquid can be separated more easily, and finally be discharged through oil reservoir sleeve pipe, finally, gas-liquid separation efficiency is above 90% has been realized, the whole annular space entering ground pipeline between oil reservoir sleeve pipe and the second oil pipe of gas production in the oil well has been realized, the procedure of oil-gas separation is carried out once more on the ground has been reduced, the cost of exploitation oil-gas is reduced, the benefit of oil-gas exploitation has been improved.
Drawings
FIG. 1 is an overall cross-sectional view of the present oil and gas separation device;
fig. 2 is a cross-sectional view of a reducer union.
Description of the reference numerals
The oil well casing 1, the second eyelet 11, the oil well pump 2, the sucker rod 21, the pump barrel 22, the piston 23, the reducer union 3, the first oil pipe 31, the foam breaking structure 311, the second oil pipe 32, the plug 321, the third oil pipe 33, the through hole 34, the internal thread 35, the external thread 36, the screen 37, the third eyelet 371, the surface casing 4, the ground 5, the artificial well bottom 6, the producing layer 61 and the air bubbles 7.
Detailed Description
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
In order to achieve the above object, the present utility model provides an oil-gas separation device comprising a casing 1 extending from a surface 5 into a production zone 61 in an oil well and an oil-well pump 2 extending from the surface 5 into the casing 1, the device further comprising a reducer union 3, a first oil pipe 31 and a second oil pipe 32 located outside the first oil pipe 31; the output end of the reducer union 3 is connected with the input end of the oil well pump 2, the input end of the reducer union 3 is connected with the output end of the first oil pipe 31, foam breaking structures 311 are distributed on the outer wall of the first oil pipe 31 along the length direction, the outer portion of the input end of the reducer union 3 is connected with the output end of the second oil pipe 32, the first oil pipe 31 extends downwards from the connection position with the reducer union 3, the end pipe wall of the second oil pipe 32 connected with the reducer union 3 is provided with a plurality of first holes, the first holes can be distributed on two sides of the reducer union 3 or distributed around the circumferential surface of the reducer union 3, the size of the first holes is not limited here, the end pipe wall of the oil layer casing 1, which is close to the producing layer 61, is provided with a plurality of second holes 11, fluid in the producing layer 61 can enter the oil layer casing 1 from the second holes 11 through the suction of the oil layer casing 2, the specific position and the size of the second holes are not limited here, the condition that the fluid can be sucked in is met, and the fluid can be pumped out from the first holes 311 on the second oil pipe 32 through the final diameter of the reducer union 3 through the reducer union 2.
According to one embodiment of the present utility model, the oil pump 2 includes a sucker rod 21 and a pump cylinder 22, a piston 23 is mounted at the end of the sucker rod 21, the piston 23 can move along the axial direction of the pump cylinder 22 in the pump cylinder 22, and the length of the pump cylinder 22 is typically 120mm. The input of pump cylinder 22 is connected with the reducing joint 3 output, and reducing joint 3 input is connected with the output of first oil pipe 31, and first oil pipe 31 input is used for letting in liquid, and first oil pipe 31's length is slightly less than the length of second oil pipe 32, and second oil pipe 32 length can select 9.5m, can satisfy like this that the oil gas that gets into from second oil pipe 32 upper end fully with the garrulous bubble structure 311 contact of first oil pipe 31 outer wall, and then broken, and because the length of first oil pipe 31 is great, can make the bubble 7 in the liquid flow back to the first aperture of second oil pipe 32 upper end under buoyancy effect in to can be discharged ground 5 through oil reservoir sleeve 1.
In the embodiment of the utility model, the pipe diameter of the oil casing 1 is 5.5 inches or 7 inches, the oil casing 1 extends from the ground 5 to the position of the production layer 61 of the artificial well bottom 6, and a second hole 11 is formed in the wall of the oil casing 1, which is close to the production layer 61, for introducing oil gas.
The oil-gas separation principle of the oil-gas separation device is as follows: when the oil pump 2 works, oil gas enters the oil well casing 1 from the production layer 61 through the second eyelet 11, moves along the axial direction (height direction) of the oil well casing 1, at the moment, most of gas can float out from the oil well casing 1, fluid enters an annulus formed by the outer wall of the first oil pipe 31 and the second oil pipe 32 from the first eyelet at the upper end of the second oil pipe 32, liquid downwards flows along the annulus under the action of gravity and negative pressure of the oil well pump 2, at the moment, part of gas can be discharged from the first eyelet between the oil well casing 1 and the second oil pipe 32 and then discharged from the oil well casing 1, the fluid flows until entering from the input end of the first oil pipe 31, and in the process of flowing along the first oil pipe 31, a large number of bubbles 7 can be broken and separated under the action of the broken bubble structure 311 on the outer wall of the first oil pipe 31, so that the bubbles float out of the first eyelet of the second oil pipe 32 more easily and are finally discharged through the oil well casing 1. Finally, the gas-liquid separation efficiency is higher than 90%, the fact that produced gas in the oil well completely enters the pipeline on the ground 5 through the annular space between the oil layer sleeve 1 and the second oil pipe 32 is achieved, the process of carrying out the oil-gas separation again on the ground 5 is reduced, and the cost of oil and gas exploitation is reduced.
Further, the reducer union 3 has a cylindrical structure with a through hole 34, the through hole 34 is formed along the axial direction of the reducer union 3, one end of the reducer union 3, which is close to the oil pump 2, is provided with an internal thread 35, one end, which is far away from the oil pump 2, is provided with an external thread 36, and the inner wall of the through hole 34 at the end is provided with an internal thread 35.
According to the embodiment provided by the utility model, the reducer union 3 is of a cylindrical structure with the through hole 34, the input end of the reducer union 3 can be of a necking structure, the external thread 36 and the internal thread 35 are conveniently arranged for connecting the second oil pipe, the output end of the reducer union 3 is provided with the internal thread 35, and the pump cylinder 22 is connected.
Further, one end of the reducer union 3 far away from the oil well pump 2 is connected with a screen pipe 37 through an external thread 36, a third eyelet 371 is distributed on one circumference of the wall of the screen pipe 37 along the axial direction, the length of the screen pipe 37 can be selected according to different conditions in the oil well, if the liquid output of the oil well pump 2 is free of sand, mud and other impurities, the length of the screen pipe 37 can be generally selected to be 3-6m, and if the impurity content is more, the length of the screen pipe 37 can be lengthened, for example, 6-15m.
According to the embodiment of the utility model, the lower end of the reducer union 3 is connected with the screen pipe 37, the wall of the screen pipe 37 is provided with the third eyelet 371, and the purpose of entering oil gas can be achieved by replacing the mode that the upper end of the second oil pipe 32 is provided with the first eyelet.
Further, the output end of the oil pump 2 is connected with a third oil pipe 33, and the third oil pipe 33 is used for sending the liquid from the oil pump 2 out of the oil well, and the oil pump 2 is deep below 1500m on the ground surface.
Further, the foam breaking structure 311 is a plurality of protrusions with different sizes distributed on the outer surface of the first oil pipe 31 in a ring, the protrusions are distributed along the height direction of the first oil pipe 31, and the sizes of the protrusions gradually increase from the end of the first oil pipe connected with the reducer union to the end far away from the reducer union. The size of the bulge of the end part of the first oil pipe, which is far away from the reducer union, is gradually increased, so that bubbles are more difficult to pass through, and the bubbles are more easily crushed.
In this embodiment, the protrusions may be welded on the outer surface of the first oil pipe 31 by welding, and distributed along the outer wall of the first oil pipe 31, where the protrusions may be randomly distributed on the outer wall of the first oil pipe 31, so as to better crush the bubbles 7.
Further, the end of the second oil pipe 32 away from the reducer union 3 is sealed by a plug 321. The plug 321 is used at the tail end of the second oil pipe 32, so as to prevent the oil gas of the second oil pipe 32 from leaking, and play a role in sealing.
Further, the diameter of the first oil pipe 31 is in the range of 35-70mm. Further, the diameter of the second oil pipe 32 is 75-105mm. Further, the diameter of the third oil pipe 33 is in the range of 35-105mm.
According to an embodiment of the present utility model, the first oil pipe 31 and the second oil pipe 32 are provided to form an annulus between the two oil pipes, so long as the pipe diameter of the first oil pipe 31 is smaller than that of the second oil pipe 32, for example, the first oil pipe 31 may have a pipe diameter of 1.5 inches, a pipe diameter of 2 inches, a pipe diameter of 2.3 inches, a pipe diameter of 2.7 inches, or the like. The second oil pipe 32 may have a pipe diameter of 3 inches, a pipe diameter of 3.5 inches, a pipe diameter of 4 inches, etc., and the third oil pipe 33 receives the liquid from the first oil pipe 31, and the pipe diameters may be selected in the pipe diameter ranges of the first oil pipe 31 and the second oil pipe 32, so long as the liquid can be pumped out of the oil pump 2.
Further, the upper end of the oil well casing 1 is externally sleeved with a surface casing 4 (near the ground end). The length of the surface casing 4 is generally in the range of 20-100m, and the surface casing 4 is of a hard structure, and can be specifically made of concrete for fixing the oil casing 1.
In the present utility model, unless otherwise indicated, the term "upper" or "lower" is used to refer generally to the casing near the upper end of the surface and the casing near the lower end of the artificial well (production zone). "inside and outside" refer to the inside of the casing, as well as the outside wall of the casing.
The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a plurality of simple variants can be made to the technical proposal of the utility model, and the utility model is not described in any more detail for the various possible combinations. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (10)
1. The oil-gas separation device comprises an oil layer sleeve and an oil pump extending into the oil layer sleeve from the upper end of the oil layer sleeve, and is characterized by further comprising a reducing joint, a first oil pipe and a second oil pipe positioned outside the first oil pipe;
wherein the output end of the reducer union is connected with the input end of the oil pump, the input end of the reducer union is connected with the output end of the first oil pipe, the outer wall of the first oil pipe is distributed with foam breaking structures along the length direction, the outer part of the input end of the reducer union is connected with the output end of the second oil pipe, the first oil pipe extends downwards from the joint of the first oil pipe and the reducer union, the end pipe wall of the second oil pipe connected with the reducer union is provided with a first eyelet, the pipe wall of the lower end of the oil layer sleeve is provided with a second eyelet, and fluid in a production layer can enter the oil layer sleeve from the second eyelet through the suction of the oil pump, and can be pumped out of the oil pump from the first oil pipe to the reducer union along the broken bubble structure from the first eyelet on the second oil pipe.
2. The oil-gas separation device according to claim 1, wherein the reducer union has a cylindrical structure with a through hole, the through hole is formed along the axial direction of the reducer union, an internal thread is formed at one end of the reducer union, which is close to the oil pump, an external thread is formed at one end of the reducer union, which is far away from the oil pump, and an internal thread is formed at the inner wall of the through hole at the end.
3. The oil-gas separation device according to claim 1 or 2, wherein one end of the reducer union, which is far away from the oil pump, is connected with a sieve tube through external threads, and third holes are distributed on the circumferential surface of the wall of the sieve tube along the axial direction.
4. A gas and oil separator device as claimed in claim 3, wherein the output of the pump is connected to a third conduit for conveying fluid from the pump out of the well.
5. The oil-gas separation device according to claim 4, wherein the foam breaking structure is protrusions distributed on the circumferential surface of the first oil pipe, the protrusions are distributed along the height direction of the first oil pipe, and the size of the protrusions gradually increases from the end, connected with the reducer union, of the first oil pipe to the end, far away from the reducer union.
6. The oil and gas separator device of claim 1, wherein the end of the second oil pipe remote from the reducer union is sealed by a plug.
7. An oil and gas separator device as claimed in any one of claims 4 to 6, wherein said first oil pipe has a diameter in the range of 35 to 70mm.
8. An oil and gas separator device as claimed in any one of claims 4 to 6, wherein said second oil pipe has a diameter in the range of 75 to 105mm.
9. An oil and gas separator device as claimed in claim 4 or 5, wherein the third oil pipe has a diameter in the range of 35-105mm.
10. The oil-gas separation device according to claim 9, wherein the outer wall of the upper end of the oil layer sleeve is sleeved with a surface layer sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222310602.XU CN219614952U (en) | 2022-08-31 | 2022-08-31 | Oil-gas separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222310602.XU CN219614952U (en) | 2022-08-31 | 2022-08-31 | Oil-gas separation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219614952U true CN219614952U (en) | 2023-09-01 |
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ID=87775164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222310602.XU Active CN219614952U (en) | 2022-08-31 | 2022-08-31 | Oil-gas separation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219614952U (en) |
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2022
- 2022-08-31 CN CN202222310602.XU patent/CN219614952U/en active Active
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