CN219953320U - Double-tube sleeved separation sedimentation device - Google Patents
Double-tube sleeved separation sedimentation device Download PDFInfo
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- CN219953320U CN219953320U CN202321403580.XU CN202321403580U CN219953320U CN 219953320 U CN219953320 U CN 219953320U CN 202321403580 U CN202321403580 U CN 202321403580U CN 219953320 U CN219953320 U CN 219953320U
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- pipe
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- central
- sedimentation
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 39
- 238000000926 separation method Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 239000004576 sand Substances 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 230000009977 dual effect Effects 0.000 claims 2
- 239000002817 coal dust Substances 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 5
- 239000007787 solid Substances 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000003129 oil well Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Removal Of Floating Material (AREA)
Abstract
The utility model relates to a double-pipe sleeved separation sedimentation device which comprises an upper joint, a liquid inlet screen pipe, a sedimentation pipe, a sand settling pipe and a guide plug which are sequentially and coaxially connected; a central pipe is arranged in the liquid inlet sieve tube and the sedimentation pipe, the top of the central pipe is connected with the upper joint, and the bottom of the central pipe is connected with the centralizing plug; an annular space formed by the central pipe and the sedimentation pipe; a first liquid inlet hole is formed in the liquid inlet screen pipe; the central tube is provided with a second liquid inlet; a third liquid inlet hole is formed in the lower end face of the centralizing plug; the well liquid enters the device through the first liquid inlet hole, after reversing, the well liquid descends along an annular space formed by the central tube and the sedimentation tube, and then enters the central tube through the second liquid inlet hole on the central tube and the third liquid inlet hole which is rightly blocked, and after reversing, enters the oil pump. The well liquid enters the pump cavity of the oil pump after passing through the device, so that solid particles such as gas, coal dust and the like are effectively prevented or reduced from being sucked into the pump cavity, the pump efficiency is improved, the device is applicable to a coal-bed gas well, and efficient drainage and production are realized.
Description
Technical Field
The utility model relates to a gas-liquid separation and solid-liquid separation sedimentation device for a coal bed gas water well, in particular to a double-pipe sleeved separation sedimentation device.
Background
At present, coal bed gas exploitation mainly adopts an underground plunger pump matched with an oil pumping unit, and the phenomenon of pump blockage or blockage is easy to occur due to the serious coal dust of a coal bed gas well, small displacement and poor coal dust carrying capacity in the stable exploitation period. In addition, the gas-liquid ratio is high, the pump efficiency is low, and the gas lock is provided.
The patent CN202123360848.X discloses a gas-liquid separation device of a coal-bed gas well, which comprises an inner pipe and an outer pipe sleeved outside the inner pipe, wherein the tops of the inner pipe and the outer pipe are fixedly connected with a joint, the joint is connected with a drainage pump, the inner pipe comprises a central pipe, the outer pipe comprises a screen pipe at the upper part and a settling pipe at the lower part, a liquid suction port is reserved at the bottom end of the central pipe and is positioned on the settling pipe, a distance is reserved between the liquid suction port and the bottom of the settling pipe, and the bottom of the settling pipe is plugged; the lower end of the central tube of the device is provided with a filter for solid-liquid separation, but the gas-liquid separation effect is poor and the device is easy to block. In addition, during oil pumping or well inclination, the central tube is not centered and contacts with the inner wall of the sedimentation tube to cause eccentric wear.
Disclosure of Invention
In order to solve the technical problems in the prior art, the utility model discloses a double-pipe sleeved separation sedimentation device which is arranged at the lower end of an oil-well pump, well liquid enters a pump cavity of the oil-well pump after passing through the device, so that solid particles such as gas, coal dust and the like are effectively prevented or reduced from being sucked into the pump cavity, the efficiency and the service life of a mechanical mining system are improved, the device is applicable to a coal-bed gas well, and high-efficiency drainage and mining are realized.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a double-pipe sleeved separation sedimentation device comprises an upper joint, a first oil pipe coupling, a liquid inlet screen pipe, a second oil pipe coupling, a sedimentation pipe, a third oil pipe coupling, a sand setting pipe and a guide plug which are sequentially and coaxially connected; a central pipe is arranged in the liquid inlet sieve tube and the sedimentation pipe, the top of the central pipe is connected with the upper joint, and the bottom of the central pipe is connected with the centralizing plug; the central pipe and the sedimentation pipe form an annular space; a first liquid inlet hole is formed in the liquid inlet screen pipe; the central tube is provided with a second liquid inlet; a third liquid inlet hole is formed in the lower end face of the centralizing plug; the well fluid enters the device through the first fluid inlet hole, flows downwards along an annular space formed by the central tube and the sedimentation tube after reversing, enters the central tube through the second fluid inlet hole on the central tube and the third fluid inlet hole for centralizing and blocking, and enters the oil pump after reversing; the utility model adopts double-tube sleeving to form an annular axial flow passage; the pipe wall is provided with a liquid inlet hole, and the well liquid flow channel realizes twice reversing.
As a further technical scheme, the upper joint is provided with an inner pipe thread at the upper end and an external thread and an internal thread at the lower end.
As a further technical scheme, the liquid inlet screen pipe is provided with connecting threads at two ends and a first liquid inlet hole is processed on the outer wall of the middle part.
As a further technical scheme, the central tube, the upper end is equipped with the external screw thread, and the lower extreme is equipped with the external screw thread, and its outer wall that is close to the lower extreme is equipped with the second feed liquor hole.
As a further technical scheme, the centralizing plug is provided with internal threads on the upper part, the outer wall is provided with a plurality of diversion trenches, and the lower end face of the centralizing plug is provided with a third liquid inlet.
As a further technical scheme, the plurality of diversion trenches are uniformly distributed.
As a further technical scheme, the upper part of the guide plug is open, the lower end of the guide plug is provided with a guide cone, and an internal thread is arranged in the guide cone.
The beneficial effects of the utility model are as follows:
when the oil well pump works, well fluid flows downwards along the annular space formed by the central tube and the sedimentation tube through the first liquid inlet hole of the liquid inlet screen tube, then flows into the central tube through the second liquid inlet hole of the central tube and the third liquid inlet hole of the centralizing and blocking lower end face, and flows into the oil well pump along the inner part of the central tube after reversing. In the process, gas is subjected to primary gas-liquid separation when passing through the liquid inlet holes of the liquid inlet sieve tube, bubbles rise when descending along the annular channel, secondary separation occurs, and tertiary separation occurs when passing through the central tube and the righting blocked liquid inlet holes. Solid particles such as coal dust and the like flow along with the flow direction and the upward and downward processes, and sink into the lower sand setting tail pipe. Effectively avoiding or reducing solid particles such as gas, coal dust and the like from entering the pump, improving the pump efficiency and prolonging the service life. And meanwhile, the bottom of the central tube is provided with a centralizing plug to prevent the central tube from being not centered and contacting with the inner wall of the sedimentation tube.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present utility model;
FIG. 2 is an enlarged schematic cross-sectional view of the upper joint of the present utility model;
FIG. 3 is an enlarged schematic view of a cross-sectional structure of a center tube of the present utility model;
FIGS. 4 (a) and 4 (b) are schematic enlarged cross-sectional views of the righting plug according to the present utility model;
FIG. 5 is a schematic cross-sectional view of a liquid inlet screen of the present utility model;
fig. 6 is an enlarged schematic cross-sectional view of the guide plug of the present utility model.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms also are intended to include the plural forms unless the present utility model clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "upper", "lower", "left" and "right" in the present utility model, if they mean only the directions of upper, lower, left and right in correspondence with the drawings themselves, are not limiting in structure, but merely serve to facilitate description of the present utility model and simplify description, rather than to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
As shown in fig. 1, the double-pipe separation sedimentation device disclosed in the embodiment comprises an upper joint 1, a tubing coupling 2, a tubing coupling 4, a tubing coupling 8, a liquid inlet screen pipe 3, a sedimentation pipe 5, a central pipe 6, a centralizing plug 7, a sand setting pipe 9 and a guiding plug 10;
the central tube 6 is arranged inside the liquid inlet screen tube 3 and the sedimentation tube 5; the upper part of the central tube 6 is arranged in the liquid inlet screen tube 3, and the lower part is arranged in the sedimentation tube 5; the top of the central tube 6 extends to the outside of the liquid inlet screen tube 3 and is connected with the upper joint 1, specifically, the top of the central tube 6 is provided with external threads, the lower part of the upper joint 1 is provided with internal threads, and the top of the central tube 6 is connected with the lower part of the upper joint 1 through threads; the bottom of the central tube 6 is positioned in the sedimentation tube 5, and the bottom of the central tube 6 is connected with a centralizing plug 7;
further, the upper joint 1 is of an annular cylindrical structure, an external thread of the outer ring of the upper joint 1 is connected with the liquid inlet screen pipe 3 through the oil pipe coupling 2, the other end of the liquid inlet screen pipe 3 is connected with the upper part of the oil pipe coupling 4 through a thread, and the lower part of the oil pipe coupling 4 is connected with the upper part of the sedimentation pipe 5; the lower part of the sedimentation pipe 5 is connected with a sand setting pipe 9 through threads, and the other end of the sand setting pipe 9 is connected with a guide plug 10; namely, the upper joint 1, the oil pipe coupling 2, the liquid inlet screen pipe 3, the oil pipe coupling 4, the sedimentation pipe 5 and the sand setting pipe 9 are coaxially arranged and are sequentially connected to form a whole;
the liquid inlet sieve tube 3 is provided with liquid inlet holes 3-3; the central tube 6 is provided with a liquid inlet 6-2; a liquid inlet 7-3 is arranged on the lower end surface of the righting plug 7; the well fluid enters the device through the fluid inlet holes 3-3 of the fluid inlet screen pipe 3, after being diverted, the well fluid descends along the annular space formed by the central pipe 6 and the sedimentation pipe 5, then enters the central pipe through the fluid inlet holes 6-2 on the central pipe 6 and the fluid inlet holes 7-3 of the centralizing plug 7, and enters the oil pump after being diverted.
Specifically, as shown in fig. 2, the upper joint 1 in this embodiment has an inner pipe thread 1-1 at its upper end and an outer pipe thread 1-2 and an inner thread 1-3 at its lower end.
As shown in FIG. 5, the liquid inlet screen pipe 3 is provided with connecting threads 3-1 and connecting threads 3-2 at two ends, and liquid inlet holes 3-3 are processed on the outer wall of the middle part.
As shown in fig. 3, the upper end of the central tube 6 is provided with external threads 6-1, the lower end is provided with external threads 6-3, and the outer wall of the central tube close to the lower end is provided with a liquid inlet 6-2;
as shown in fig. 4 (a) and fig. 4 (b), the righting plug 7 is provided with an internal thread 7-1, the outer wall is provided with four diversion trenches 7-2, the four diversion trenches 7-2 are uniformly distributed, and the lower end surface of the righting plug is provided with a liquid inlet 7-3;
as shown in FIG. 6, the upper part of the guide plug 10 is open, the lower end is provided with a guide cone 10-2, and an internal thread 10-1 is arranged in the guide cone.
The implementation process of the utility model is as follows:
the device is connected to the lower part of the pump through the upper end screw thread 1-1 of the upper joint 1. In operation, well fluid enters the device through the fluid inlet holes 3-3 of the fluid inlet screen pipe 3, after being diverted, the well fluid descends along the annular space formed by the central pipe 6 and the sedimentation pipe 5, then enters the central pipe through the fluid inlet holes 6-2 of the central pipe 6, and after being diverted, enters the oil pump along the inner hole of the central pipe 6. In the process, gas is subjected to primary gas-liquid separation when passing through the liquid inlet holes 3-3 of the liquid inlet screen pipe 3, bubbles rise when descending along the annular channel, secondary separation is performed, and tertiary separation is performed when passing through the liquid inlet holes 6-2 of the central pipe 6. Solid particles such as coal dust and the like flow along with the flow direction and the upward and downward processes, and sink into the lower sand setting tail pipe.
Further, in the embodiment, in order to improve the separation effect, the flow passage before the well liquid enters the pump, that is, the total length of the central tube 6 is 20 meters, and in order to facilitate the processing and the field operation, a threaded connection mode is adopted;
further, to increase the flow passage area, the flow rate is reduced: the inner hole of the sinking pipe 5 is 62mm, the outer diameter of the central pipe is 38mm, and the annular sectional area reaches 1884mm 2 。
Further, to reduce the inlet hole diameter: the diameter of the liquid inlet hole of the liquid inlet screen pipe 3 is 6mm, 124 holes can be arranged, and the flow passage area is 3504mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The diameter of the liquid inlet hole of the central tube 6 is 6mm, 50 holes can be arranged, and the flow passage area is 1413mm 2 。
Finally, it is pointed out that relational terms such as first and second are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The double-tube sleeved separation sedimentation device is characterized by comprising an upper joint, a liquid inlet screen pipe, a sedimentation tube, a sand setting tube and a guide plug which are sequentially and coaxially connected; a central pipe is arranged in the liquid inlet sieve tube and the sedimentation pipe, the top of the central pipe is connected with the upper joint, and the bottom of the central pipe is connected with the centralizing plug; the central pipe and the sedimentation pipe form an annular space; a first liquid inlet hole is formed in the liquid inlet screen pipe; the central tube is provided with a second liquid inlet; a third liquid inlet hole is formed in the lower end face of the centralizing plug; the well liquid enters the device through the first liquid inlet hole, after reversing, the well liquid descends along an annular space formed by the central tube and the sedimentation tube, and then enters the central tube through the second liquid inlet hole on the central tube and the third liquid inlet hole which is rightly blocked, and after reversing, enters the oil pump.
2. The double-pipe sleeved separation sedimentation device of claim 1, wherein the upper joint is provided with an inner pipe thread at the upper end and an outer thread and an inner thread at the lower end.
3. The double-tube nested separation sedimentation device of claim 1, wherein the liquid inlet screen tube is provided with connecting threads at two ends, and the outer wall of the middle part is provided with a first liquid inlet hole.
4. The double-tube sleeved separation sedimentation device of claim 1, wherein the upper end of the central tube is provided with external threads, the lower end of the central tube is provided with external threads, and the outer wall of the central tube close to the lower end of the central tube is provided with a second liquid inlet.
5. The double-tube sleeved separation sedimentation device of claim 1, wherein the upper part of the righting plug is provided with internal threads, the outer wall is provided with a plurality of diversion trenches, and the lower end surface of the diversion trenches is provided with a third liquid inlet.
6. The double-tube nested separation sedimentation device of claim 5, wherein the plurality of diversion trenches are uniformly distributed.
7. The double-tube sleeved separation sedimentation device of claim 1, wherein the upper part of the guide plug is open, the lower end of the guide plug is provided with a guide cone, and the guide plug is internally provided with internal threads.
8. The dual tube nested separation settling device of claim 1, wherein the upper joint is connected to the liquid feed screen via a first tubing coupling.
9. The dual tube nested separation settling device of claim 1, wherein the liquid feed screen is coupled to the settling tube via a second tubing coupling.
10. The double-pipe sleeved separation settling device as claimed in claim 1, wherein the settling pipe is connected with the sand setting pipe through a third tubing coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321403580.XU CN219953320U (en) | 2023-06-03 | 2023-06-03 | Double-tube sleeved separation sedimentation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321403580.XU CN219953320U (en) | 2023-06-03 | 2023-06-03 | Double-tube sleeved separation sedimentation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219953320U true CN219953320U (en) | 2023-11-03 |
Family
ID=88535200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321403580.XU Active CN219953320U (en) | 2023-06-03 | 2023-06-03 | Double-tube sleeved separation sedimentation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219953320U (en) |
-
2023
- 2023-06-03 CN CN202321403580.XU patent/CN219953320U/en active Active
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