CN220487569U - Tracer layering injection and sampling device - Google Patents
Tracer layering injection and sampling device Download PDFInfo
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- CN220487569U CN220487569U CN202322273820.5U CN202322273820U CN220487569U CN 220487569 U CN220487569 U CN 220487569U CN 202322273820 U CN202322273820 U CN 202322273820U CN 220487569 U CN220487569 U CN 220487569U
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- 239000000700 radioactive tracer Substances 0.000 title claims abstract description 96
- 238000002347 injection Methods 0.000 title claims abstract description 91
- 239000007924 injection Substances 0.000 title claims abstract description 91
- 238000005070 sampling Methods 0.000 title claims abstract description 79
- 238000003860 storage Methods 0.000 claims abstract description 70
- 238000000034 method Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 238000007599 discharging Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000011161 development Methods 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 239000011232 storage material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the technical field of petroleum development, in particular to a tracer layering injection and sampling device. Technical problems: in-process that carries out the layering to the tracer pours into, if can't install the effect that pours into the subassembly into according to required length can influence the layering, when taking a sample to the sample, is difficult to wash the sample storage chamber and influences measuring result, when putting in the tracer to the reservoir intracavity, the problem that the tracer takes place to precipitate in the intracavity and influences the sampling effect. The technical scheme is as follows: the tracer layering injection and sampling device comprises an injection assembly, a storage assembly and a sample storage assembly. According to the utility model, the tracer is injected through the injection assembly capable of being quickly disassembled and assembled, so that the problem that the effect of layered injection can be influenced if the injection assembly cannot be installed according to the required length, when a sample is sampled, the sample storage cavity is difficult to clean to influence the measurement result, and when the tracer is put into the sample storage cavity, the tracer is precipitated in the cavity to influence the sampling effect is solved.
Description
Technical Field
The utility model belongs to the technical field of petroleum development, and particularly relates to a tracer layering injection and sampling device.
Background
The tracer is injected from an injection well, then the surrounding production wells are sampled according to a certain sampling rule, the output condition is monitored, the samples are analyzed to obtain a tracer output curve, then fitting is carried out, the communication condition of an oil-water well in the water injection development process is reflected, the advancing direction, the displacement speed, the sweep area, the reservoir heterogeneity, the residual oil saturation distribution and the like of the injected water are mastered, thus the design of oil well exploitation and the adjustment of the later development period of an oil field are guided, the tracer is usually injected by using a device capable of carrying out layered injection for better tracer detection, but the effect of layered injection can be influenced if an injection component with a corresponding length cannot be installed according to the required length during measurement, the measurement result is influenced when the device is cleaned, the tracer is difficult to be cleaned after the sample storage cavity is taken down, and the tracer is placed in the reservoir cavity, and the effect of precipitation can be influenced when the tracer is put in the reservoir cavity.
Disclosure of Invention
In order to overcome the in-process of carrying out layering injection to the tracer, if can't install the injection subassembly of corresponding length according to required length when measuring and can influence layering injection's effect, when wasing the device, be difficult to wash after taking off the sample storage chamber and influence measuring result, when putting in the tracer to the reservoir intracavity, the problem that the tracer takes place to deposit in the intracavity and influences the sampling effect.
The technical scheme of the utility model is as follows: the tracer stratified injection and sampling device comprises a sampling box, an injection assembly, a sampling assembly, a storage assembly and a sample storage assembly; the inner wall of the sampling box is provided with a tracer storage component for storing a tracer and a sample storage component for storing a sample; an injection assembly for injecting the tracer into the injection well is arranged at the lower end of the reservoir assembly; the lower end of the sampling box is provided with a sampling assembly for sampling in the production well; the sample storage assembly lower extreme is provided with the sampling assembly that is used for gathering the sample.
Preferably, when the tracer is injected into the injection well in a layered manner, the injection assembly with the corresponding number is installed according to the length of the injection well, the tracer is poured into the storage assembly, the tracer is injected into the injection well in a layered manner through the injection assembly, so that the problem that the effect of layered injection is affected if a plurality of injection assemblies cannot be installed according to the required length during measurement is solved, when the device is cleaned, the sampling assembly is taken down from the sample storage assembly, the sample storage assembly is taken out from the sampling box, the sample storage assembly is cleaned, the tracer can be prevented from remaining in the sample storage assembly, the measurement result is affected, and when the tracer is injected into the injection well, the tracer is stirred through stirring equipment in the sample storage assembly, so that the problem that the tracer is precipitated in a cavity to affect the sampling effect is solved.
Preferably, the sampling box comprises a box body, a box door, a handle, a box lock, a storage rack, a placing groove, a first through hole and a second through hole; the front end of the box body is hinged with a box door; the box door is provided with a handle and a box lock; a commodity shelf is fixedly arranged on the inner wall of the box body; the storage rack is fixedly provided with a placing groove; the lower end of the box body is provided with a first through hole in a penetrating way; the upper end and the lower end of the commodity shelf are provided with second through holes in a penetrating way; when using the sampling case, open the chamber door through the handle, place the rack with the sample storage subassembly on, sample subassembly and sample storage subassembly pass first through-hole and second through-hole and connect.
Preferably, the reservoir component comprises a tracer placing cavity, a second spiral groove, a first threaded sealing plug, a third through hole, a second electromagnetic valve, a waterproof motor and stirring blades; the inner wall of the box body is fixedly provided with a tracer placing cavity; the upper end of the box body is provided with a second spiral groove in a penetrating way; the inner wall of the second screw groove is in threaded connection with a first threaded sealing plug; when the tracer is required to be added, the first threaded sealing plug is taken down from the second spiral groove, the tracer is poured into the tracer placing cavity through the second spiral groove, the first threaded sealing plug is installed on the second spiral groove, and the effect that other substances fall into the tracer placing cavity to influence measurement is avoided.
Preferably, a second electromagnetic valve is fixedly arranged on the inner wall of the lower end of the box body; the lower end of the tracer placing cavity is provided with a third through hole in a penetrating way; the inner wall of the third through hole is fixedly connected with the water inlet end of the second electromagnetic valve; the inner wall of the lower end of the tracer placing cavity is fixedly provided with a symmetrical waterproof motor; the upper end of the output shaft of the waterproof motor is fixedly provided with a stirring blade; before the layering injection is needed, the waterproof motor is utilized to drive the stirring blade to rotate, so that the tracer is prevented from precipitating, and when the sampling device is used, the second electromagnetic valve is opened, so that the tracer can be discharged from the tracer placing cavity.
Preferably, the sample storage component comprises a sample storage cavity, a third screw groove, a second threaded sealing plug and a fourth through hole; the inner wall of the placing groove is provided with a sample storage cavity; the front end of the sample storage cavity is provided with a third spiral groove and a fourth through hole in a penetrating way; the inner wall of the third screw groove is connected with a second thread sealing plug in a threaded manner; when the sample is required to be stored, the sample is collected into the sample storage cavity through the sampling assembly, the sample is collected after the second threaded sealing plug is taken down, the sampling assembly arranged on the sample storage cavity is taken down, the sample storage cavity is taken out from the box body, the sample storage cavity is cleaned, and the influence of residual tracer on the measurement result can be avoided.
Preferably, the injection assembly comprises a discharge pipe, a first screw groove, a material injection pipe, a waterproof electromagnetic valve and a screw column; the lower end of the box body is movably provided with a discharging pipe; the inner wall of the upper end of the discharging pipe is fixedly provided with a first spiral groove; the inner wall of the first spiral groove is arranged at the water outlet end of the second electromagnetic valve in a threaded manner; a material injection pipe is arranged on the material discharge pipe; a waterproof electromagnetic valve is arranged between the discharging pipe and the material injection pipe; a threaded column is fixedly arranged at the lower end of the discharging pipe; the outer wall of the threaded column is matched with the inner wall of the first screw groove; when the tracer is required to be injected into the injection well in a layered manner, a corresponding number of discharging pipes are installed according to the length of the injection well, the tracer is injected into the injection well after passing through the injection pipe, and the effect of layered injection is achieved by using the plurality of installed discharging pipes and the injection pipe.
Preferably, the sampling assembly comprises a sampling tube, a first electromagnetic valve, a first connecting tube, a water pump and a second connecting tube; the inner wall of the lower end of the box body is fixedly provided with a water pump and a first electromagnetic valve; the water outlet end of the water pump is fixedly connected with a second connecting pipe; the second connecting pipe penetrates through the second through hole and is connected to the inner wall of the fourth through hole; the water inlet end of the water pump is fixedly connected with a first connecting pipe; the lower end of the first connecting pipe is fixedly connected with the water outlet end of the first electromagnetic valve; the water inlet end of the first electromagnetic valve is fixedly connected with a sampling tube; when the production well needs to be sampled, the water pump is utilized to collect samples in the production well, so that the samples are collected in the sample storage cavity after passing through the sampling pipe, the first electromagnetic valve, the first connecting pipe, the water pump and the second connecting pipe.
The utility model has the beneficial effects that:
1. when the tracer is required to be injected into the injection well in a layered manner, installing a corresponding number of injection assemblies according to the length of the injection well, pouring the tracer into the storage assembly, and injecting the tracer into the injection well in a layered manner through the injection assemblies, so that the problem that if a plurality of injection assemblies cannot be installed according to the required length during measurement, the effect of layered injection is affected is solved;
2. when the device is cleaned, the sampling assembly is taken down from the sample storage assembly, then the sample storage assembly is taken out from the sampling box, the sample storage assembly is cleaned, and the tracer is prevented from remaining in the sample storage assembly by cleaning the sample storage assembly so as to influence the measurement result;
3. when the tracer is injected into the injection well, the tracer is stirred by the stirring blades in the tracer storage component, so that the problem that the sampling effect is affected by the precipitation of the tracer in the cavity is solved; in addition, when equipment is used, the electromagnetic valve arranged between the injection assembly and the storage agent assembly, between the sampling assembly and the storage sample assembly and between the discharging pipe and the injection pipe can accurately control the injection and sampling.
Drawings
FIG. 1 shows a schematic perspective view of a layered tracer injection and sampling device according to the present utility model;
FIG. 2 shows a schematic diagram of the internal three-dimensional structure of a sampling box of the tracer layered injection and sampling device of the utility model;
FIG. 3 shows a schematic perspective view of a tracer layered injection and sampling device reservoir assembly and a sample reservoir assembly according to the present utility model;
FIG. 4 shows a schematic perspective view of an injection assembly of a layered tracer injection and sampling apparatus according to the present utility model;
fig. 5 shows a schematic perspective view of a sampling assembly of the tracer layered injection and sampling apparatus of the utility model.
The marks in the drawings are: 1-sample box, 2-injection assembly, 3-sampling assembly, 4-reservoir assembly, 5-sample storage assembly, 10-box, 11-box door, 12-handle, 13-box lock, 14-rack, 15-holding groove, 16-first through hole, 17-second through hole, 20-discharge pipe, 21-first screw groove, 22-injection pipe, 23-waterproof solenoid valve, 24-screw column, 30-sampling pipe, 31-first solenoid valve, 32-first connecting pipe, 33-water pump, 34-second connecting pipe, 40-tracer holding cavity, 41-second screw groove, 42-first screw sealing plug, 43-third through hole, 44-second solenoid valve, 45-waterproof motor, 46-stirring blade, 50-sample holding cavity, 51-third screw groove, 52-second screw sealing plug, 53-fourth through hole.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
Referring to fig. 1-3, embodiments of the present utility model are provided: the tracer layering injection and sampling device comprises a sampling box 1, an injection assembly 2, a sampling assembly 3, a storage agent assembly 4 and a sampling assembly 5; the inner wall of the sampling box 1 is provided with a tracer storage component 4 for storing a tracer and a sample storage component 5 for storing a sample; the lower end of the reservoir component 4 is provided with an injection component 2 for injecting tracer into an injection well; the lower end of the sampling box 1 is provided with a sampling assembly 3 for sampling in the production well; the lower end of the sample storage component 5 is provided with a sampling component 3 for collecting samples.
Referring to fig. 2 to 3, in the present embodiment, the sampling box 1 includes a box body 10, a box door 11, a handle 12, a box lock 13, a rack 14, a placement groove 15, a first through hole 16 and a second through hole 17; the front end of the box body 10 is hinged with a box door 11; the box door 11 is provided with a handle 12 and a box lock 13; a commodity shelf 14 is fixedly arranged on the inner wall of the box body 10; the shelf 14 is fixedly provided with a placing groove 15; the lower end of the box body 10 is provided with a first through hole 16 in a penetrating way; the upper and lower ends of the shelf 14 are provided with second through holes 17 in a penetrating way; the reservoir assembly 4 comprises a tracer placing cavity 40, a second screw groove 41, a first threaded sealing plug 42, a third through hole 43, a second electromagnetic valve 44, a waterproof motor 45 and a stirring blade 46; the inner wall of the box body 10 is fixedly provided with a tracer placing cavity 40; the upper end of the box body 10 is provided with a second screw groove 41 in a penetrating way; the inner wall of the second screw groove 41 is connected with a first thread sealing plug 42 in a threaded manner; a second electromagnetic valve 44 is fixedly arranged on the inner wall of the lower end of the box body 10; a third through hole 43 is formed through the lower end of the tracer placing cavity 40; the inner wall of the third through hole 43 is fixedly connected to the water inlet end of the second electromagnetic valve 44; a symmetrical waterproof motor 45 is fixedly arranged on the inner wall of the lower end of the tracer placement cavity 40; the upper end of the output shaft of the waterproof motor 45 is fixedly provided with a stirring blade 46; the sample storage component 5 comprises a sample storage cavity 50, a third screw groove 51, a second threaded sealing plug 52 and a fourth through hole 53; the inner wall of the placing groove 15 is provided with a sample storage cavity 50; the front end of the sample storage cavity 50 is provided with a third spiral groove 51 and a fourth through hole 53 in a penetrating way; the inner wall of the third screw groove 51 is connected with a second thread sealing plug 52 in a threaded manner.
Referring to fig. 4 to 5, in the present embodiment, the injection assembly 2 includes a discharge pipe 20, a first screw groove 21, a filling pipe 22, a waterproof solenoid valve 23, and a screw column 24; the lower end of the box body 10 is movably provided with a discharging pipe 20; the inner wall of the upper end of the discharging pipe 20 is fixedly provided with a first spiral groove 21; the inner wall of the first screw groove 21 is arranged at the water outlet end of the second electromagnetic valve 44 in a threaded manner; the discharging pipe 20 is provided with a material filling pipe 22; a waterproof electromagnetic valve 23 is arranged between the discharging pipe 20 and the feeding pipe 22; a threaded column 24 is fixedly arranged at the lower end of the discharging pipe 20; the outer wall of the threaded column 24 is matched with the inner wall of the first screw groove 21; the sampling assembly 3 comprises a sampling tube 30, a first electromagnetic valve 31, a first connecting tube 32, a water pump 33 and a second connecting tube 34; the inner wall of the lower end of the box body 10 is fixedly provided with a water pump 33 and a first electromagnetic valve 31; the water outlet end of the water pump 33 is fixedly connected with a second connecting pipe 34; the second connecting pipe 34 passes through the second through hole 17 and is connected to the inner wall of the fourth through hole 53; the water inlet end of the water pump 33 is fixedly connected with a first connecting pipe 32; the lower end of the first connecting pipe 32 is fixedly connected to the water outlet end of the first electromagnetic valve 31; the water inlet end of the first electromagnetic valve 31 is fixedly connected with a sampling tube 30.
When the tracer stirring device works, the tracer is added into the tracer placing cavity 40 in advance, the waterproof motor 45 is started to enable the output shaft of the waterproof motor 45 to drive the stirring blade 46 to rotate, and the tracer is stirred to avoid precipitation;
then, a corresponding number of discharging pipes 20 are arranged on the second electromagnetic valve 44 according to the length of the water injection well, and the second electromagnetic valve 44 and the waterproof electromagnetic valve 23 are opened, so that the tracer passes through the discharging pipes 20 and is injected into the injection well from the injection pipe 22 in a layered manner;
after the tracer is injected, the first electromagnetic valve 31 is opened, the water pump 33 is started to enable the water inlet of the water pump 33 to sample the interior of the production well, and the sample passes through the sampling tube 30, the first connecting tube 32 and the second connecting tube 34 to be stored in the sample storage cavity 50;
after the sampling is completed, the second threaded sealing plug 52 on the sample storage cavity 50 is removed, the sample in the sample storage cavity 50 is collected, and when the sample storage cavity 50 needs to be cleaned, the second connecting pipe 34 is removed to remove the sample storage cavity 50 from the box 10, and then the interior of the sample storage cavity 50 is cleaned.
Through the steps, when the tracer is injected into the injection well in a layered manner, the injection assembly 2 with the corresponding number is installed according to the length of the injection well, the tracer is poured into the storage assembly 4, the tracer is injected into the injection well in a layered manner through the injection assembly 2, so that the problem that the effect of layered injection is affected if a plurality of injection assemblies 2 cannot be installed according to the required length during measurement is solved, when the device is cleaned, the second connecting pipe 34 installed on the sample storage cavity 50 is removed, then the sample storage cavity 50 is taken out of the box 10, the inside is cleaned, the tracer can be prevented from remaining in the sample storage assembly, thereby affecting the measurement result, when the tracer is injected into the injection well, the tracer is stirred through the stirring blade 46 in the tracer placement cavity 40, so that the problem that the precipitation of the tracer in the cavity affects the sampling effect is solved, and when the device is used, the injection and sampling can be accurately controlled by means of the electromagnetic valves arranged between the injection assembly 2 and the storage assembly 4, the sampling assembly 3 and the sample storage assembly 5 and the discharging pipe 20 and the discharging pipe 22.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (7)
1. The tracer stratified injection and sampling device comprises a sampling box (1); the method is characterized in that: the device also comprises an injection assembly (2), a sampling assembly (3), a storage assembly (4) and a sample storage assembly (5); the inner wall of the sampling box (1) is provided with a tracer storage component (4) for storing a tracer and a sample storage component (5) for storing a sample; an injection assembly (2) for injecting the tracer into the injection well is arranged at the lower end of the reservoir assembly (4); the lower end of the sampling box (1) is provided with a sampling assembly (3) for sampling in the production well; the lower end of the sample storage component (5) is provided with a sampling component (3) for collecting samples.
2. The tracer layered injection and sampling device according to claim 1, wherein the sampling box (1) comprises a box body (10), a box door (11), a handle (12), a box lock (13), a storage rack (14), a placing groove (15), a first through hole (16) and a second through hole (17); the front end of the box body (10) is hinged with a box door (11); the box door (11) is provided with a handle (12) and a box lock (13); a commodity shelf (14) is fixedly arranged on the inner wall of the box body (10); the commodity shelf (14) is fixedly provided with a placing groove (15); the lower end of the box body (10) is provided with a first through hole (16) in a penetrating way; the upper end and the lower end of the commodity shelf (14) are provided with second through holes (17) in a penetrating way.
3. The tracer layered injection and sampling device according to claim 2, wherein: the agent storage component (4) comprises a tracer placing cavity (40), a second screw groove (41), a first threaded sealing plug (42), a third through hole (43), a second electromagnetic valve (44), a waterproof motor (45) and stirring blades (46); the inner wall of the box body (10) is fixedly provided with a tracer placing cavity (40); the upper end of the box body (10) is provided with a second spiral groove (41) in a penetrating way; the inner wall of the second screw groove (41) is connected with a first thread sealing plug (42) in a threaded manner.
4. A tracer layered injection and sampling device according to claim 3, wherein: a second electromagnetic valve (44) is fixedly arranged on the inner wall of the lower end of the box body (10); the lower end of the tracer placing cavity (40) is provided with a third through hole (43) in a penetrating way; the inner wall of the third through hole (43) is fixedly connected with the water inlet end of the second electromagnetic valve (44); the inner wall of the lower end of the tracer placing cavity (40) is fixedly provided with a symmetrical waterproof motor (45); the upper end of the output shaft of the waterproof motor (45) is fixedly provided with a stirring blade (46).
5. The tracer layered injection and sampling device according to claim 2, wherein: the sample storage component (5) comprises a sample storage cavity (50), a third screw groove (51), a second threaded sealing plug (52) and a fourth through hole (53); a sample storage cavity (50) is arranged on the inner wall of the placing groove (15); the front end of the sample storage cavity (50) is provided with a third spiral groove (51) and a fourth through hole (53) in a penetrating way; the inner wall of the third screw groove (51) is connected with a second thread sealing plug (52) in a threaded manner.
6. The tracer layered injection and sampling device according to claim 4, wherein: the injection assembly (2) comprises a discharge pipe (20), a first spiral groove (21), an injection pipe (22), a waterproof electromagnetic valve (23) and a threaded column (24); the lower end of the box body (10) is movably provided with a discharging pipe (20); a first spiral groove (21) is fixedly formed in the inner wall of the upper end of the discharging pipe (20); the inner wall of the first spiral groove (21) is arranged at the water outlet end of the second electromagnetic valve (44) in a threaded manner; a material injection pipe (22) is arranged on the material discharge pipe (20); a waterproof electromagnetic valve (23) is arranged between the discharging pipe (20) and the material injection pipe (22); a threaded column (24) is fixedly arranged at the lower end of the discharging pipe (20); the outer wall of the threaded column (24) is matched with the inner wall of the first screw groove (21).
7. The tracer layered injection and sampling device according to claim 2, wherein: the sampling assembly (3) comprises a sampling tube (30), a first electromagnetic valve (31), a first connecting tube (32), a water pump (33) and a second connecting tube (34); the inner wall of the lower end of the box body (10) is fixedly provided with a water pump (33) and a first electromagnetic valve (31); the water outlet end of the water pump (33) is connected with a second connecting pipe (34); the second connecting pipe (34) penetrates through the second through hole (17) and is connected to the inner wall of the fourth through hole (53); the water inlet end of the water pump (33) is connected with a first connecting pipe (32); the lower end of the first connecting pipe (32) is fixedly connected with the water outlet end of the first electromagnetic valve (31); the water inlet end of the first electromagnetic valve (31) is fixedly connected with a sampling tube (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322273820.5U CN220487569U (en) | 2023-08-21 | 2023-08-21 | Tracer layering injection and sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322273820.5U CN220487569U (en) | 2023-08-21 | 2023-08-21 | Tracer layering injection and sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220487569U true CN220487569U (en) | 2024-02-13 |
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ID=89833209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322273820.5U Active CN220487569U (en) | 2023-08-21 | 2023-08-21 | Tracer layering injection and sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220487569U (en) |
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2023
- 2023-08-21 CN CN202322273820.5U patent/CN220487569U/en active Active
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