CN112814648A - Optical fiber type oil well sanding downhole detection device - Google Patents
Optical fiber type oil well sanding downhole detection device Download PDFInfo
- Publication number
- CN112814648A CN112814648A CN202011632501.3A CN202011632501A CN112814648A CN 112814648 A CN112814648 A CN 112814648A CN 202011632501 A CN202011632501 A CN 202011632501A CN 112814648 A CN112814648 A CN 112814648A
- Authority
- CN
- China
- Prior art keywords
- air
- liquid discharge
- discharge pipe
- oil well
- detection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Abstract
The invention provides an optical fiber type oil well sand production underground detection device, which belongs to the technical field of oil exploitation and comprises a cylinder body, wherein the side wall of the cylinder body is communicated with a liquid inlet pipe, the bottom of the cylinder body is connected with a first liquid discharge pipe through a conical part, the bottom of the first liquid discharge pipe is connected with a second liquid discharge pipe through a hose, an air storage outer cylinder is fixedly arranged on the outer sides of the first liquid discharge pipe and the second liquid discharge pipe, a third valve is arranged on the first liquid discharge pipe, a fourth valve is arranged on the second liquid discharge pipe, and an air supply assembly for introducing air into the air storage outer cylinder and an air suction assembly for sucking air out of the air storage outer cylinder are arranged on the side wall; the upper portion of the inner side of the second liquid discharge pipe is lapped with a containing net, a supporting plate is movably arranged in the second liquid discharge pipe, a weighing module is arranged on the upper portion of the supporting plate, and a plurality of through holes are formed in the supporting plate. The device has the advantages of simple structure, convenience in use, low cost and good well fluid sand production detection effect.
Description
Technical Field
The invention belongs to the technical field of oil exploitation, and particularly relates to an optical fiber type oil well sand production underground detection device.
Background
Due to the limited space and high oil well productivity of the offshore oil production platform, the oil well lifting mode mostly adopts an electric submersible pump for pumping; however, because the oil deposit deposition environment is marine phase deposition, the lithology of the producing layer is mainly sandstone, and sand can be produced from the oil well if the oil deposit deposition environment is careless in the oil extraction process. The sand production of the oil well is an important factor for restricting the yield of the oil well, and is represented by oil pipe sand blockage, capacity reduction, production stop, damage to the oil-gas well and an oil pipeline, equipment corrosion and the like, and the oil field development cost is greatly increased while the loss is brought to the oil-gas field development operation. Therefore, monitoring of oil well sand production is particularly critical.
At present, most of the detection for oil well sand production comprises a wave detection method, an ER detection method, an X-ray detection method and the like, most of devices related to the methods are high in manufacturing cost and complex in structure, and subsequent maintenance is inconvenient, so that an optical fiber oil well sand production underground detection device which is simple in structure, low in manufacturing cost and good in detection effect needs to be provided to meet the requirements.
Disclosure of Invention
In view of the above deficiencies of the prior art, an embodiment of the present invention provides an optical fiber type downhole detection device for detecting sand production from an oil well.
In order to solve the technical problems, the invention provides the following technical scheme:
an optical fiber type underground detection device for sand production of an oil well comprises a barrel body, wherein the side wall of the barrel body is communicated with a liquid inlet pipe, the bottom of the barrel body is connected with a first liquid discharge pipe through a conical part, the bottom of the first liquid discharge pipe is connected with a second liquid discharge pipe through a hose, an air storage outer barrel is fixedly arranged on the outer sides of the first liquid discharge pipe and the second liquid discharge pipe, a third valve is arranged on the first liquid discharge pipe, a fourth valve is arranged on the second liquid discharge pipe, and an air supply assembly for introducing air into the air storage outer barrel and an air suction assembly for drawing out the air in the air storage outer barrel are arranged on the side; the upper portion of the inner side of the second liquid discharge pipe is lapped with a containing net, a supporting plate is movably arranged in the second liquid discharge pipe, a weighing module is arranged on the upper portion of the supporting plate, a plurality of through holes are formed in the supporting plate, a sealing plate is hinged to the bottom of each through hole, and the weighing module is electrically connected with an external display module through optical fibers.
As a further improvement of the invention: the air supply assembly comprises a second air pump fixedly mounted on the side wall of the barrel body and a second air inlet pipe connected to the output end of the second air pump, one end, far away from the second air pump, of the second air inlet pipe is communicated with the inner cavity of the air storage outer barrel, and a second valve is arranged in the second air inlet pipe.
As a further improvement of the invention: the air suction assembly comprises a first air pump fixedly mounted on the side wall of the barrel body and a first air inlet pipe connected to the output end of the first air pump, one end, far away from the first air pump, of the first air inlet pipe is communicated with the inner cavity of the air storage outer barrel, and a first valve is arranged in the first air inlet pipe.
As a further improvement of the invention: the hose is made of rubber or plastic.
As a still further improvement of the invention: the sealing plate can rotate in the range of 0-45 degrees along the bottom of the supporting plate.
As a still further improvement of the invention: the through holes are distributed annularly.
As a still further improvement of the invention: the diameter of the meshes of the containing net is smaller than that of the sand.
As a still further improvement of the invention: the supporting plate side wall is fixedly provided with a limiting block, the inner wall of the second liquid discharge pipe is provided with a limiting groove which is vertically distributed, and the limiting block extends to the inside of the limiting groove and is in sliding fit with the limiting groove.
Compared with the prior art, the invention has the beneficial effects that:
in the implementation of the sand weighing device, the hose, the gas storage outer barrel, the gas supply assembly, the gas suction assembly and the weighing module are matched with each other, so that the automatic weighing of the sand can be realized, the sand can be gathered towards the middle by the hose in the weighing process, the problem of inaccurate weighing result caused by the contact of the inner wall of the hose and the sand is solved, and the sand weighing device has the advantages of simple structure, convenience in use, low cost and good sand production detection effect of well fluid compared with the prior art.
Drawings
FIG. 1 is a schematic structural diagram of an optical fiber type downhole detection device for sand production from an oil well;
FIG. 2 is a schematic external view of an optical fiber type downhole detection device for sand production from an oil well;
FIG. 3 is an enlarged view of area A of FIG. 1;
in the figure: 1-cylinder, 2-liquid inlet pipe, 3-first air pump, 4-exhaust pipe, 5-first valve, 6-conical part, 7-first exhaust pipe, 8-hose, 9-gas storage outer cylinder, 10-second exhaust pipe, 11-fourth valve, 12-third valve, 13-gas inlet pipe, 14-second valve, 15-second air pump, 16-limiting block, 17-limiting groove, 18-supporting plate, 19-through hole, 20-containing net, 21-weighing module and 22-sealing plate.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1
Referring to fig. 1-3, the present embodiment provides an optical fiber type downhole detection device for sand production from an oil well, which includes a barrel 1, a liquid inlet pipe 2 is connected to a side wall of the barrel 1, a first liquid discharge pipe 7 is connected to a bottom of the barrel 1 through a tapered portion 6, a second liquid discharge pipe 10 is connected to a bottom of the first liquid discharge pipe 7 through a flexible pipe 8, an air storage outer cylinder 9 is fixedly disposed outside the first liquid discharge pipe 7 and the second liquid discharge pipe 10, a third valve 12 is disposed on the first liquid discharge pipe 7, a fourth valve 11 is disposed on the second liquid discharge pipe 10, and an air supply assembly for introducing air into the air storage outer cylinder 9 and an air suction assembly for sucking air out of the air storage outer cylinder 9 are mounted on a side wall of the barrel 1; a containing net 20 is lapped on the upper portion of the inner side of the second liquid discharge pipe 10, a supporting plate 18 is movably arranged inside the second liquid discharge pipe 10, a weighing module 21 is arranged on the upper portion of the supporting plate 18, a plurality of through holes 19 are formed in the supporting plate 18, a sealing plate 22 is hinged to the bottom of each through hole 19, and the weighing module 21 is electrically connected with an external display module (not shown) through optical fibers (not shown).
Initially, the third valve 12 is opened, the fourth valve 11 is closed, well fluid can enter the cylinder 1 through the fluid inlet pipe 2, after standing for a period of time, sand in the well fluid can be deposited inside the hose 8 through the tapered portion 6 and the first fluid discharge pipe 7 and accumulated on the upper portion of the containing net 20, then the third valve 12 is closed, the fourth valve 11 is opened, the well fluid inside the hose 8 and the second fluid discharge pipe 10 can be discharged from the port of the second fluid discharge pipe 10 through the containing net 20 and the through hole 19, then air is introduced into the air storage outer cylinder 9 through the air supply assembly, so that the pressure inside the air storage outer cylinder 9 is increased, the hose 8 is driven to contract inwards to squeeze the sand, the sand is accumulated on the upper portion of the containing net 20 in a tapered structure, then the air inside the air storage outer cylinder 9 is pumped out through the air suction assembly, so that negative pressure is formed inside the air storage outer cylinder 9, and the hose 8 is, the sand weighing device is separated from sand, the sealing plate 22 can be driven to rotate upwards under the action of negative pressure in the air storage outer cylinder 9 so as to plug the through hole 19, the supporting plate 18 is driven to move upwards, the weighing module 21 is used for touching the bottom of the containing net 20 and driving the containing net 20 and the sand on the upper portion of the containing net to move upwards, the weight of the sand is weighed through the weighing module, weighing information is transmitted to an external display module through optical fibers to be displayed, and therefore automatic detection of the sand is achieved.
Specifically, the air supply assembly comprises a second air pump 15 fixedly mounted on the side wall of the barrel body 1 and a second air inlet pipe 13 connected to the output end of the second air pump 15, one end, far away from the second air pump 15, of the second air inlet pipe 13 is communicated with the inner cavity of the air storage outer barrel 9, and a second valve 14 is arranged on the second air inlet pipe 13.
Air is introduced into the second air inlet pipe 13 through the second air pump 15, so that the air enters the air storage outer cylinder 9 to drive the hose 8 to contract inwards, and extrusion of sand is realized.
Specifically, the air suction assembly comprises a first air pump 3 fixedly mounted on the side wall of the barrel body 1 and a first air inlet pipe 4 connected to the output end of the first air pump 3, one end, far away from the first air pump 3, of the first air inlet pipe 4 is communicated with the inner cavity of the air storage outer barrel 9, and a first valve 5 is arranged on the first air inlet pipe 4.
Air in the inner cavity of the air storage outer cylinder 9 is pumped out through the first air pump 3 and the first air inlet pipe 4 so as to drive the hose 8 to expand outwards and separate from the sand, and therefore the phenomenon that weighing is inaccurate due to the fact that the hose 8 is in contact with the sand in the sand weighing process is avoided.
In this embodiment, the hose 8 is made of rubber or plastic, and may be made of other elastic materials.
In this embodiment, the electrical connection between the weighing module 21 and the external display module through the optical fiber belongs to a common known means of those skilled in the art, and will not be described herein in detail.
In this embodiment, the sealing plate 22 can rotate along the bottom of the supporting plate 18 within an angle of 0-45 degrees, so as to prevent the sealing plate 22 from rotating too much relative to the supporting plate 18, and further prevent the sealing plate 22 from blocking the through hole 19 when negative pressure is generated inside the air storage outer cylinder 9.
In this embodiment, a plurality of the through holes 19 are distributed in a ring shape.
In this embodiment, the mesh diameter of the holding net 20 is smaller than the diameter of sand.
Example 2
Referring to fig. 3, in this embodiment, compared with embodiment 1, an optical fiber type downhole detection device for sand production of an oil well is provided, in which a limiting block 16 is fixedly disposed on a side wall of a supporting plate 18, a vertically distributed limiting groove 17 is disposed on an inner wall of a second liquid discharge pipe 10, and the limiting block 16 extends into the limiting groove 17 and is in sliding fit with the limiting groove 17.
Through the cooperation of the limiting block 16 and the limiting groove 17, when negative pressure is formed inside the gas storage outer cylinder 9, the supporting plate 18 can stably move upwards, so that the weighing module 21 is utilized to weigh sand.
In the implementation of the sand weighing device, the hose 8, the gas storage outer cylinder 9, the gas supply assembly, the gas suction assembly and the weighing module are matched with each other, so that the sand can be automatically weighed, the sand can be gathered towards the middle by the hose 8 in the weighing process, the problem of inaccurate weighing result caused by the contact of the inner wall of the hose 8 and the sand is solved, and the sand weighing device has the advantages of simple structure, convenience in use, low cost and good well fluid sand outlet detection effect compared with the prior art.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (8)
1. The underground detection device for sand production of the optical fiber type oil well is characterized by comprising a cylinder body (1), wherein the side wall of the cylinder body (1) is communicated with a liquid inlet pipe (2), the bottom of the cylinder body (1) is connected with a first liquid discharge pipe (7) through a conical part (6), the bottom of the first liquid discharge pipe (7) is connected with a second liquid discharge pipe (10) through a hose (8), the outer sides of the first liquid discharge pipe (7) and the second liquid discharge pipe (10) are fixedly provided with an air storage outer cylinder (9), the first liquid discharge pipe (7) is provided with a third valve (12), the second liquid discharge pipe (10) is provided with a fourth valve (11), and the side wall of the cylinder body (1) is provided with an air supply component for introducing air into the outer cylinder (9) and an air suction component for pumping out the air in the air storage outer cylinder (; the liquid discharging device is characterized in that a containing net (20) is lapped on the upper portion of the inner side of the second liquid discharging pipe (10), a supporting plate (18) is movably arranged inside the second liquid discharging pipe (10), a weighing module (21) is arranged on the upper portion of the supporting plate (18), a plurality of through holes (19) are formed in the supporting plate (18), a sealing plate (22) is hinged to the bottom of each through hole (19), and the weighing module (21) is electrically connected with an external display module through optical fibers.
2. An optical fiber type downhole detection device for sand production from an oil well according to claim 1, wherein the gas supply assembly comprises a second gas pump (15) fixedly installed on the side wall of the cylinder body (1) and a second gas inlet pipe (13) connected to the output end of the second gas pump (15), one end of the second gas inlet pipe (13) far away from the second gas pump (15) is communicated with the inner cavity of the gas storage outer cylinder (9), and a second valve (14) is arranged on the second gas inlet pipe (13).
3. An optical fiber type oil well sanding downhole detection device according to claim 1 or 2, wherein the air suction assembly comprises a first air pump (3) fixedly installed on the side wall of the cylinder body (1) and a first air inlet pipe (4) connected to the output end of the first air pump (3), one end, away from the first air pump (3), of the first air inlet pipe (4) is communicated with the inner cavity of the air storage outer cylinder (9), and a first valve (5) is arranged on the first air inlet pipe (4).
4. An optical fibre type downhole detection device for sanding in an oil well according to claim 1, characterized in that the hose (8) is made of rubber or plastic.
5. An optical fibre type downhole sensing device for producing sand from an oil well according to claim 1 or 4, wherein the sealing plate (22) is rotatable along the bottom of the support plate (18) within an angle of 0-45 degrees.
6. An optical fibre type downhole detection device for sanding in an oil well according to claim 5, characterized in that a number of said through holes (19) are distributed annularly.
7. An optical fibre type downhole detection device for sanding in an oil well according to claim 1, characterized in that the mesh diameter of the containing net (20) is smaller than the diameter of sand.
8. An optical fiber type downhole detection device for sand production from an oil well according to claim 1, wherein a limit block (16) is fixedly arranged on the side wall of the support plate (18), a vertically distributed limit groove (17) is formed in the inner wall of the second drain pipe (10), and the limit block (16) extends into the limit groove (17) and is in sliding fit with the limit groove (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011632501.3A CN112814648B (en) | 2020-12-31 | 2020-12-31 | Optical fiber type oil well sanding underground detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011632501.3A CN112814648B (en) | 2020-12-31 | 2020-12-31 | Optical fiber type oil well sanding underground detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112814648A true CN112814648A (en) | 2021-05-18 |
| CN112814648B CN112814648B (en) | 2022-05-20 |
Family
ID=75856426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011632501.3A Active CN112814648B (en) | 2020-12-31 | 2020-12-31 | Optical fiber type oil well sanding underground detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112814648B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110061860A1 (en) * | 2009-09-17 | 2011-03-17 | Chevron U.S.A. Inc. | Computer-implemented systems and methods for controlling sand production in a geomechanical reservoir system |
| CN103072091A (en) * | 2012-12-27 | 2013-05-01 | 广州华臻机械设备有限公司 | Sand supply device for waterjet |
| WO2017080353A1 (en) * | 2015-11-12 | 2017-05-18 | 中国科学院广州能源研究所 | Device for testing characteristics of sand production during mining of natural gas hydrate |
| CN209959237U (en) * | 2019-05-24 | 2020-01-17 | 克拉玛依四维石油科技有限公司 | Horizontal well multi-well section liquid production profile physical simulation experiment device |
| CN210317279U (en) * | 2019-06-13 | 2020-04-14 | 长江大学 | Hydrate exploitation sand prevention well completion analysis experimental device |
| CN210370612U (en) * | 2019-05-31 | 2020-04-21 | 中国海洋石油集团有限公司 | Production well sand production amount monitoring device |
| CN111271015A (en) * | 2020-01-20 | 2020-06-12 | 武汉正洪岩土工程有限公司 | Pile hole gas lift reverse circulation device and gas lift reverse circulation hole cleaning process |
| CN111348702A (en) * | 2020-03-27 | 2020-06-30 | 陕西山秦能源技术服务有限公司 | Vacuum demulsification sterilization cyclone air flotation separation tank and separation method thereof |
| CN111379554A (en) * | 2020-04-24 | 2020-07-07 | 江苏联友科研仪器有限公司 | Automatic classification online real-time metering device for hydrate exploitation sand production |
-
2020
- 2020-12-31 CN CN202011632501.3A patent/CN112814648B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110061860A1 (en) * | 2009-09-17 | 2011-03-17 | Chevron U.S.A. Inc. | Computer-implemented systems and methods for controlling sand production in a geomechanical reservoir system |
| CN102575510A (en) * | 2009-09-17 | 2012-07-11 | 雪佛龙美国公司 | Computer-implemented systems and methods for controlling sand production in a geomechanical reservoir system |
| CN103072091A (en) * | 2012-12-27 | 2013-05-01 | 广州华臻机械设备有限公司 | Sand supply device for waterjet |
| WO2017080353A1 (en) * | 2015-11-12 | 2017-05-18 | 中国科学院广州能源研究所 | Device for testing characteristics of sand production during mining of natural gas hydrate |
| CN209959237U (en) * | 2019-05-24 | 2020-01-17 | 克拉玛依四维石油科技有限公司 | Horizontal well multi-well section liquid production profile physical simulation experiment device |
| CN210370612U (en) * | 2019-05-31 | 2020-04-21 | 中国海洋石油集团有限公司 | Production well sand production amount monitoring device |
| CN210317279U (en) * | 2019-06-13 | 2020-04-14 | 长江大学 | Hydrate exploitation sand prevention well completion analysis experimental device |
| CN111271015A (en) * | 2020-01-20 | 2020-06-12 | 武汉正洪岩土工程有限公司 | Pile hole gas lift reverse circulation device and gas lift reverse circulation hole cleaning process |
| CN111348702A (en) * | 2020-03-27 | 2020-06-30 | 陕西山秦能源技术服务有限公司 | Vacuum demulsification sterilization cyclone air flotation separation tank and separation method thereof |
| CN111379554A (en) * | 2020-04-24 | 2020-07-07 | 江苏联友科研仪器有限公司 | Automatic classification online real-time metering device for hydrate exploitation sand production |
Non-Patent Citations (6)
| Title |
|---|
| HUA LV: "Experimental study of planar shock wave interactions with dense packed sand wall", 《INTERNATIONAL JOURNAL OF MULTIPHASE FLOW》 * |
| LUCA ALBERT: "Geothermal heat pumps for sustainable farm climatization and field irrigation", 《AGRICULTURAL WATER MANAGEMENT》 * |
| 常立群: "井下钻井液固液分离装置设计及其流动特性分析", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》 * |
| 杜军社: "试井资料在压裂效果评价中的应用", 《新疆石油地质》 * |
| 江迎军: "安岳、合川区块须家河组气藏欠平衡钻井储层保护技术研究", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》 * |
| 魏剑飞: "埕北及旅大油田冷采条件下的出砂控制研究", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112814648B (en) | 2022-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112814648B (en) | Optical fiber type oil well sanding underground detection device | |
| CN212674909U (en) | Sampling device for underground water pollutant experiment monitoring analysis | |
| CN211116638U (en) | Pipeline pump with good energy-saving effect | |
| CN211146942U (en) | Recharge system after geothermal water utilization | |
| CN220104388U (en) | Quick detection device of food quality | |
| CN207469362U (en) | A kind of large size booster pump station anti-intrusion encloses boundary's device | |
| CN219104445U (en) | Deep water sampling device | |
| CN111999118A (en) | Multilayer groundwater water level observation device of hydrogeology hole | |
| CN209900939U (en) | External water injection device of portable dust removal fog gun machine | |
| CN218542238U (en) | Optical fiber type single-well metering device with self-cleaning function | |
| CN220814082U (en) | Automatic change pump station control system | |
| CN217803316U (en) | Large-size vehicle-mounted curved surface hard-to-hard vacuum full laminating machine | |
| CN214066276U (en) | Hydraulic engineering water level detection device | |
| CN218143414U (en) | Wine jar goes out wine device fast | |
| CN219012854U (en) | Drilling underground water taking device | |
| CN220768141U (en) | Pipe well sealing device for high-pressure water head of sand layer deep foundation pit | |
| CN219838971U (en) | Surplus wine recovery unit of stainless steel wine jar at bottom of awl | |
| CN220285714U (en) | Well cementation fluid collection equipment | |
| CN218121292U (en) | Go into wall water tank test water platform | |
| CN220932704U (en) | Test system for measuring two-phase flow process in vertical pipeline | |
| CN216741389U (en) | Shield for underground electric pump pipe column | |
| CN218325509U (en) | Self-priming pump with filtering structure | |
| CN109946119B (en) | Shipborne micro-plastic layered sampling device | |
| CN217654682U (en) | Filter gas tightness detection test device | |
| CN220979824U (en) | Water pump with recorded water pumping capacity for farmland irrigation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |