CN209277853U - A kind of fluid power promotion flushing manhole tubing string - Google Patents
A kind of fluid power promotion flushing manhole tubing string Download PDFInfo
- Publication number
- CN209277853U CN209277853U CN201920005094.XU CN201920005094U CN209277853U CN 209277853 U CN209277853 U CN 209277853U CN 201920005094 U CN201920005094 U CN 201920005094U CN 209277853 U CN209277853 U CN 209277853U
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- Prior art keywords
- oil
- tubing string
- fluid power
- pipe
- washing pipe
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Abstract
The utility model discloses a kind of fluid power to push flushing manhole tubing string, including, packing tubing string, fluid power pushing meanss and pumping pumping equipment；The packing tubing string is arranged in pit shaft, insulating tubing string includes lower packet, upper packer, oil pipe eye pipe, dynamic sealing cylinder, oil pipe column, lower packet, upper packer, oil pipe eye pipe, dynamic sealing cylinder, oil pipe column are sequentially connected from bottom to up, it can connected pipes between two components, it can also be not connected to oil pipe, lower packet is arranged below the circle of oil and gas reservoir perforated interval bottom, upper packer is arranged more than the circle of oil and gas reservoir perforated interval top, oil and gas reservoir is arranged between lower packet and upper packer, and perforated interval is provided in oil and gas reservoir；The utility model solves the problems, such as that flushing manhole brings infiltration to injure and using being restricted, protect oil and gas reservoir, expanded application range oil and gas reservoir.
Description
Technical field
The utility model relates to petroleum natural gas exploration technical field, in particular to a kind of fluid power, which pushes, rinses well casing
Column.
Background technique
In oilfield explorating developing process, by rinse well operations rinse siltation oil/gas well lower wellbore greasy dirt,
Greasy filth and silt restore oil/gas well and normally produce.Rinsing well operations is exactly by flushing manhole tubing string tripping in oil/gas well, with certain
Pressure and discharge capacity are injected into oil/gas well rinses well working fluid and establishes circulation, replaces liquid in oil/gas well, carries oil/gas well well
Greasy dirt, greasy filth and the silt of cylinder lower part siltation achieve the purpose that flushing and cleaning pit shaft.
Rinse well operations be penetrate out oil and gas reservoir, oil gas well shaft it is hydraulically full in the case where complete.By oil/gas well
The effect of interior head of liquid liquid and rinses well working fluid and infiltrates oil and gas reservoir in oil/gas well, make oil and gas reservoir liquid-producing capacity and
The decline of oil-producing gas deliverability, the decline degree of oil-producing gas deliverability cause oil gas to store up commonly greater than the decline degree of liquid-producing capacity
Layer infiltration injury, infiltration injury be it is permanent, irreversible, oil and gas reservoir once infiltrates injury, liquid-producing capacity and oil-producing
Gas deliverability cannot restore completely.
The skill that application number 201820724664.6 " a kind of with the flushing manhole tube rod column for preventing injury reservoir function " provides
Art scheme.Although efficiently solving the infiltration injury of oil and gas reservoir；But comprising flushing manhole push tube rod column use
Rod string pushes, and belongs to mechanical driven, first is that in the oil/gas well of the not no production facilities such as water injection well, water supply well, natural gas well
Upper application is restricted；Second is that being more than to apply to be restricted on the specified lower deep deep-well of rod string.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of existing technologies, and provides a kind of fluid power promotion flushing manhole
Tubing string had both overcome the problems, such as existing flushing manhole technology infiltration injury oil and gas reservoir；Overcome again existing flushing manhole technical application by
The problem of limitation.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution:
A kind of fluid power of the utility model pushes flushing manhole tubing string, including, packing tubing string, fluid power pushing meanss and pumping drain
Device；
The packing tubing string is arranged in pit shaft, packing tubing string include lower packet, upper packer, oil pipe eye pipe, move it is close
Sealed tube, oil pipe column, lower packet, upper packer, oil pipe eye pipe, dynamic sealing cylinder, oil pipe column are sequentially connected from bottom to up, and two
Between a component can connected pipes, can also be not connected to oil pipe, lower packet be arranged on oil and gas reservoir perforated interval bottom circle hereinafter, on
Packer is arranged more than the circle of oil and gas reservoir perforated interval top, and oil and gas reservoir is arranged between lower packet and upper packer, oil
Perforated interval is provided in gas reservoir；
Fluid power pushing meanss setting in packing tubing string, fluid power pushing meanss include washing pipe, valve seat, valve ball,
Weight linear meter, wirerope, rope end sealer, washing pipe are connect with valve seat, and valve seat is connected to washing pipe upper end, valve ball, weight linear meter,
Wirerope is sequentially connected from bottom to up, and rope end sealer is connected to oil pipe column upper end, and the pit shaft upper end is connected with blowout preventer,
Blowout preventer is provided with sleeve opening above the pit shaft under blowout preventer in wellhead sealing oil jacket annulus；
Pumping pumping equipment setting in packing tubing string, the pumping pumping equipment include waterpower swab, weight linear meter,
Wirerope, waterpower swab, weight linear meter, wirerope are sequentially connected from bottom to up.
Preferably, the packing tubing string between the blowout preventer and rope end sealer is provided with oil pipe mouth.
Preferably, the annular space that the wirerope and packing tubing string inner cavity are formed is rope grease annular space, the washing pipe and envelope
The annular space that pipe column inner cavity is formed is to rush oil ring sky, and the annular space that the washing pipe and pit shaft are formed is punching set annular space.
Preferably, the washing pipe passes through dynamic sealing cylinder, and the lower section of packing tubing string bottom end, washing pipe length is arranged in washing pipe bottom end
Equal to or more than the length on dynamic sealing cylinder top to artificial bottom of a well, the washing pipe is the hollow tubular product of the identical no hoop of outer diameter,
Washing pipe and dynamic sealing cylinder are dynamic sealing cooperation, and washing pipe can slide in dynamic sealing cylinder, are provided with resistance in the dynamic sealing cylinder
Component, across the washing pipe of dynamic sealing cylinder, can only under fluid power promotion slide downward, cannot be in slide downward under Gravitative Loads.
Preferably, the valve seat outer diameter is greater than dynamic sealing cylinder internal diameter, and valve seat cannot pass through in driven sealing drum.
Preferably, valve ball can be sitting on valve seat, can not also be sitting on valve seat.
Preferably, valve ball is sitting on valve seat, and valve seat and valve ball are sealing cooperation, and liquid can only be single from bottom to up
To flowing, fluid power can push valve ball, valve seat and washing pipe to glide.
Preferably, valve ball is not sitting on valve seat, and liquid can upper and lower two-way flow.
Preferably, the rope end sealer and wirerope are packing_seal, and the wirerope can use logging cable or steel
Silk substitution.
Preferably, the lower packet, upper packer are set in pit shaft.
The utility model beneficial effect achieved is: not storing up with oil gas first is that rinsing well working fluid during packer setting
Layer contact；Second is that reduce fluid column in pit shaft by pumping drain or gas lift liquid drainage, in pit shaft head of liquid below or near
Oil and gas reservoir current pressure avoid or reduces liquid infiltration in pit shaft and enters oil and gas reservoir；It is applied to third is that can expand
Do not have on the oil/gas well of production facilities.To solve flushing manhole and bring infiltration injury and application to be restricted oil and gas reservoir
The problem of, oil and gas reservoir is protected, application range has been expanded.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.
In the accompanying drawings:
Fig. 1 is that the utility model flushing manhole tubing string constitutes schematic diagram；
Fig. 2 is that the utility model fluid power pushes schematic diagram；
Fig. 3 is the utility model pumping drain schematic diagram.
In figure: 1. oil and gas reservoirs, 2 artificials bottom of a well, 3. pit shafts, 4. lower packets, 5. upper packers, 6. oil pipe columns, 7.
Oil jacket annulus, 8. oil pipe eye pipes, 9. dynamic sealing cylinders, 10. washing pipes, 11. valve seats, 12. valve balls, 15. weight linear meters, 16. steel wires
Rope, 17. rope grease annular spaces, 18. rush oil ring sky, 19. sleeve openings, 20. blowout preventers, 21. oil pipe mouths, 22. rope end sealers, 23. punchings
Cover annular space, 24. waterpower swabs.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment
As shown in Figure 1-3, it includes that packing tubing string, fluid power push dress that a kind of fluid power of the utility model, which pushes flushing manhole tubing string,
It sets and pumping pumping equipment；The packing tubing string is arranged in pit shaft, and packing tubing string includes lower packet 4, upper packer 5, oil
Pipe eye pipe 8, dynamic sealing cylinder 9, oil pipe column 6, lower packet 4, upper packer 5, oil pipe eye pipe 8, dynamic sealing cylinder 9, oil pipe column 6
Be sequentially connected from bottom to up, between two components can connected pipes, oil pipe can also be not connected to, the setting of lower packet 4 is stored up in oil gas
Hereinafter, upper packer 5 is arranged more than 1 perforated interval top circle of oil and gas reservoir, the setting of oil and gas reservoir 1 exists on layer 1 perforated interval bottom circle
Between lower packet 4 and upper packer 5, perforated interval is provided in oil and gas reservoir 1；The fluid power pushing meanss setting is insulating
In tubing string, fluid power pushing meanss include washing pipe 10, valve seat 11, valve ball 12, weight linear meter 15, wirerope 16, rope end sealer
22, washing pipe 10 is connect with valve seat 11, and valve seat 11 is connected to 10 upper end of washing pipe, valve ball 12, weight linear meter 15, wirerope 16 from
Under it is supreme be sequentially connected, rope end sealer 22 is connected to 6 upper end of oil pipe column, and 3 upper end of pit shaft is connected with blowout preventer 20, envelope
Well device 20 is provided with sleeve opening 19 above the pit shaft 3 under blowout preventer 20 in wellhead sealing oil jacket annulus 7.The blowout preventer
Packing tubing string between 20 and rope end sealer 22 is provided with oil pipe mouth 21.
Further: the annular space that the wirerope 16 is formed with packing tubing string inner cavity is rope grease annular space 17, the punching
The annular space that pipe 10 and packing tubing string inner cavity are formed is to rush oil ring sky 18, and the annular space that the washing pipe 10 is formed with pit shaft is
Punching set annular space 23.
The washing pipe 10 passes through dynamic sealing cylinder 9, and the lower section of packing tubing string bottom end, 10 length of washing pipe is arranged in 10 bottom end of washing pipe
Equal to or more than the length on 9 top of dynamic sealing cylinder to artificial bottom of a well, the washing pipe 10 is the hollow tube of the identical no hoop of outer diameter
Material, washing pipe 10 and dynamic sealing cylinder 9 are dynamic sealing cooperation, and washing pipe 10 can slide in dynamic sealing cylinder 9, and liquid cannot pass through washing pipe
Gap between 10 and dynamic sealing cylinder 9.
It is further: to be provided with resistance component in the dynamic sealing cylinder 9, across the washing pipe 10 of dynamic sealing cylinder 9, cannot rely on
Self weight and it is free to slide, added fluid power promotion lower slider can only passed through from top to bottom.
11 outer diameter of valve seat is greater than 9 internal diameter of dynamic sealing cylinder, and valve seat 11 cannot pass through in driven sealing drum 9, valve
Seat 11 is sealing cooperation with valve ball 12, and valve ball 12 is seated on valve seat 11, and liquid cannot flow from top to bottom from valve ball 12
It is dynamic.
Further: the rope end sealer 22 is packing_seal, fastening pressure cap locked coil wire rope 16, pine with wirerope 16
Opening pressure cap wirerope 16 can glide in rope end sealer 22.
Further: the wirerope 16 can be substituted with logging cable or steel wire.
Further: the lower packet 4, upper packer 5 are set in pit shaft 3, and valve ball 12 and valve seat 11 are detached from,
22 fit sealing of rope end sealer, forms flushing manhole circulation canal, and flushing manhole circulation canal includes that direct circulation channel, reacting cycle are logical
Road.
Direct circulation channel: below 17 → valve ball of oil pipe mouth 21 → rope grease annular space, 12 lower end with it is more than 11 upper end of valve seat it
Between packing tubing string inner cavity → 11 → washing pipe of valve seat, 10 → washing pipe, 10 lower end 23 → oil pipe of annular space eye pipe is covered with well-sinking 3 → punching
8 upper ends are with 7 → sleeve opening of undershoot oil ring sky 18 → oil pipe eye 8 → oil jacket annulus of pipe 19.
Reacting cycle channel: 8 upper end of sleeve opening 19 → oil jacket annulus, 7 → oil pipe eye pipe 8 → oil pipe eye pipe is empty with undershoot oil ring
18 → punching set 23 → washing pipe of annular space, 10 lower end with it is more than 11 → valve seat of well-sinking 3 → washing pipe, 10 → valve seat, 11 upper end with valve
Tubing string inner cavity → rope grease 17 → oil pipe of annular space mouth 21 is insulated between below 12 lower end of ball.
Implementable includes positive flushing manhole, recoil three kinds of flushing manholes of well-flushing and positive and negative alternate flushing manhole.
Further: the rope end sealer 22 unclamps pressure cap, transfers wirerope 16, and wirerope 16 is transferred length and is not more than
Flushing manhole undershoot length, valve ball 12 are seated on valve seat 11, fastening pressure cap locked coil wire rope 16, inject liquid from oil pipe mouth 21
Pressurization pushes valve ball 12, valve seat 11, washing pipe 10 to glide.
In packing tubing string, the pumping pumping equipment includes waterpower swab 24, counterweight for the pumping pumping equipment setting
Bar 15, wirerope 16, waterpower swab 24, weight linear meter 15, wirerope 16 are sequentially connected from bottom to up.
Further: the pumping drain can reduce liquid-column height in pit shaft 3, make in pit shaft 3 head of liquid be lower than or
Person is close to current oil and gas reservoir pressure.
Further: the pumping drain can be substituted with gas lift liquid drainage.
Embodiment 1:
1, oil/gas well overview
Pound sign: XY19-63, well are other: development well, layer position: C6, oil and gas reservoir: 1851.3-1866.8m, reservoir thickness:
15.5m, perforated interval: 1853.0-1859.0m, perforation thickness: 6.0m, 3 diameter of pit shaft: 124.26mm, artificial bottom of a well 2:
1883.2m。
2, tubing string and device are constituted
2.1, pipe string combination (from bottom to up) is insulated: Y221-115 × 0.8m lower packet 4+ φ 73mm × 11.7m flat
Oil pipe+Y111-115 × 0.6m upper packer 5+ φ 73mm × 1.0m flat eye pipe+φ 73mm × 6.0m dynamic sealing cylinder+φ 73mm
Plain end oil well pipe is to well head.
2.2, fluid power pushing meanss combination (from bottom to up):
(1) pipe pushes away combination: φ 38mm × 45.0m washing pipe 10+ φ 41mm × 0.8m valve seat 11.
(2) rope pushes away combination: φ 35mm valve ball 12+ φ 35mm × 6.0m weight linear meter 15+ φ 12.7mm pumping wirerope 16 to
Well head.
2.3, setting position: Y221-115 lower packet 4-1863.2m, Y111-115 upper packer 5-1851.0m.
3, tubing string and device are set
3.1, install blowout preventer, tripping in Y221-115 × 0.8m lower packet 4, φ 73mm × 12.2m plain end oil well pipe,
Y111-115 × 0.6m upper packer 5, φ 73mm × 1.0m flat eye pipe, φ 73mm × 6.0m dynamic sealing cylinder 9, φ 73mm ×
19.3m plain end oil well pipe (2).
3.2, the tripping in out of φ 73mm plain end oil well pipe: φ 38mm × 45.0m washing pipe 10, φ 41mm × 0.8m valve seat 11,
It is aligned 10 lower end of φ 38mm washing pipe with 4 lower end of Y221-115 lower packet.
3.3, continue tripping in φ 73mm plain end oil well pipe column, make Y221-115 lower packet 4 to 1863.2m, set Y221-
115 lower packets 4 and Y111-115 upper packer 5.
3.4, rope end sealer 22 is connected, rope end sealer 22 unclamps pressure cap, the tripping in φ 35mm valve out of packing tubing string
Ball 12, φ 35mm × 6.0m weight linear meter 15, φ 12.7mm pumping wirerope 16 make φ 35mm valve ball 12 to well depth 1816.0m,
22 fastening pressure cap of rope end sealer.
4, well operations are rinsed
4.1, flushing manhole type: recoil well-flushing.
4.2, circulation fills pit shaft 3: sleeve opening 19 connects pump truck, and discharge capacity 630L/min is pumped 1.7~2.1Mpa, injection punching
Well-flushing working solution about 15.6m3Oil pipe mouth 21 returns liquid, termination of pumping, and rope end sealer 22 unclamps pressure cap, transfers the about 1.8m of wirerope 16,
Oil pipe mouth 21 connects pump truck, 22 fastening pressure cap of rope end sealer.
4.3, fluid power pushes: 0 ↑ 5.1Mpa of pump pressure, and sleeve opening 19 does not return liquid, termination of pumping, and sleeve opening 19 connects pump truck.
4.4, recoil well-flushing: discharge capacity 670L/min is pumped 2.0~2.6Mpa, lasts 4min injection and rinses well working fluid about
2.8m3, it is suitable with injection rate that oil pipe mouth 21 returns liquid measure, termination of pumping, and rope end sealer 22 unclamps pressure cap, wirerope about 2.0m is transferred,
Oil pipe mouth 21 connects pump truck, 22 fastening pressure cap of rope end sealer.
4.5, fluid power pushes: 0 ↑ 5.0Mpa of pump pressure, and sleeve opening 19 does not return liquid, termination of pumping, and sleeve opening 19 connects pump truck.
4.6, recoil well-flushing；
4.7, fluid power pushes；
Implement fluid power promotion and recoil well-flushing repeatedly, add up the decentralization about 18m of wirerope 16, adds up to inject and rinse well working fluid
About 17.3m3, oil pipe mouth 21 successively returns out crude oil → black dirt → dark brown silt → brown sewage → clear water, until sleeve opening
19 is consistent with 21 water colour of oil pipe mouth, and rope end sealer 22 unclamps pressure cap, acts wirerope 16, weight linear meter 15 and valve ball 12.
5, pumping drain: tripping in waterpower swab 24, weight linear meter 15, wirerope 16 out of packing tubing string, pumping are deep to 1800m,
Well working fluid about 19.0m is rinsed in discharge3, water colour is limpid.
6, it unseals, acts insulating tubing string, valve seat 11, washing pipe 10 in pit shaft 3.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic
It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of fluid power pushes flushing manhole tubing string, including, packing tubing string, fluid power pushing meanss and pumping pumping equipment；Its feature
It is:
In pit shaft (3), packing tubing string includes lower packet (4), upper packer (5), oil pipe eye pipe for the packing tubing string setting
(8), dynamic sealing cylinder (9), oil pipe column (6), lower packet (4), upper packer (5), oil pipe eye pipe (8), dynamic sealing cylinder (9),
Oil pipe column (6) is sequentially connected from bottom to up, between two components can connected pipes, oil pipe, lower packet (4) can also be not connected to
Be arranged on oil and gas reservoir (1) perforated interval bottom circle hereinafter, upper packer (5) setting oil and gas reservoir (1) perforated interval top circle with
On, oil and gas reservoir (1) is arranged between lower packet (4) and upper packer (5), is provided with perforated interval in oil and gas reservoir (1)；
In packing tubing string, fluid power pushing meanss include washing pipe (10), valve seat (11), valve for the fluid power pushing meanss setting
Ball (12), weight linear meter (15), wirerope (16), rope end sealer (22), washing pipe (10) are connect with valve seat (11), valve seat
(11) it is connected to washing pipe (10) upper end, valve ball (12), weight linear meter (15), wirerope (16) are sequentially connected from bottom to up, rope end
Sealer (22) is connected to oil pipe column (6) upper end, and pit shaft (3) upper end is connected with blowout preventer (20), and blowout preventer (20) exists
Wellhead sealing oil jacket annulus (7), pit shaft (3) top under blowout preventer (20) are provided with sleeve opening (19)；
In packing tubing string, the pumping pumping equipment includes waterpower swab (24), weight linear meter for the pumping pumping equipment setting
(15), wirerope (16), waterpower swab (24), weight linear meter (15), wirerope (16) are sequentially connected from bottom to up.
2. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that the blowout preventer (20) and rope
Packing tubing string between head sealer (22) is provided with oil pipe mouth (21).
3. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that the wirerope (16) and envelope
The annular space that pipe column inner cavity is formed is rope grease annular space (17), and the annular that the washing pipe (10) and packing tubing string inner cavity are formed is empty
Between oil ring is empty (18) to rush, the annular space that the washing pipe (10) and pit shaft are formed is punching set annular space (23).
4. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that the washing pipe (10) passes through dynamic
The lower section of packing tubing string bottom end is arranged in sealing drum (9), washing pipe (10) bottom end, and washing pipe (10) length is equal to or more than dynamic sealing
The length of cylinder (9) top to artificial bottom of a well, the washing pipe (10) are the hollow tubular product of the identical no hoop of outer diameter, washing pipe (10) and dynamic
Sealing drum (9) is dynamic sealing cooperation, and washing pipe (10) can slided in dynamic sealing cylinder (9), is being provided in the dynamic sealing cylinder (9)
Resistance component, pass through dynamic sealing cylinder (9) washing pipe (10), can only fluid power promotion under slide downward, cannot be under Gravitative Loads
Slide downward.
5. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that valve seat (11) outer diameter
Greater than dynamic sealing cylinder (9) internal diameter, valve seat (11) cannot pass through in driven sealing drum (9).
6. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that valve ball (12) can be sitting in all
On your seat (11), it can not also be sitting on valve seat (11).
7. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that valve ball (12) is sitting in valve
On seat (11), valve seat (11) and valve ball (12) are sealing cooperation, and liquid one-way flow, fluid power can only push from bottom to up
Valve ball (12), valve seat (11) and washing pipe (10) glide.
8. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that valve ball (12) is not sitting in all
On your seat (11), liquid can upper and lower two-way flow.
9. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that the rope end sealer (22)
It is packing_seal with wirerope (16), the wirerope (16) can be substituted with logging cable or steel wire.
10. a kind of fluid power according to claim 1 pushes flushing manhole tubing string, which is characterized in that the lower packet (4),
Upper packer (5) is set in pit shaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920005094.XU CN209277853U (en) | 2019-01-02 | 2019-01-02 | A kind of fluid power promotion flushing manhole tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920005094.XU CN209277853U (en) | 2019-01-02 | 2019-01-02 | A kind of fluid power promotion flushing manhole tubing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209277853U true CN209277853U (en) | 2019-08-20 |
Family
ID=67608497
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920005094.XU Expired - Fee Related CN209277853U (en) | 2019-01-02 | 2019-01-02 | A kind of fluid power promotion flushing manhole tubing string |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059973A (en) * | 2021-11-25 | 2022-02-18 | 祥业能源有限公司 | Oil gas well drainage device |
-
2019
- 2019-01-02 CN CN201920005094.XU patent/CN209277853U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059973A (en) * | 2021-11-25 | 2022-02-18 | 祥业能源有限公司 | Oil gas well drainage device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190820 Termination date: 20200102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |