CN216381367U - Injection well mediation sampling device - Google Patents
Injection well mediation sampling device Download PDFInfo
- Publication number
- CN216381367U CN216381367U CN202123097639.0U CN202123097639U CN216381367U CN 216381367 U CN216381367 U CN 216381367U CN 202123097639 U CN202123097639 U CN 202123097639U CN 216381367 U CN216381367 U CN 216381367U
- Authority
- CN
- China
- Prior art keywords
- cylinder
- cutting
- impact
- barrel
- cutting cylinder
- 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.)
- Active
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses an injection well dredging sampling device, wherein the injection well dredging sampling device comprises: cutting the cylinder; one end of the cutting cylinder is connected with the impact cylinder in a sliding manner through a connecting mechanism, and the sliding connection is that the cutting cylinder can move back and forth along the directions of two ends while being connected with the impact cylinder; a reset mechanism is arranged between the cutting cylinder and the impact cylinder, and is used for keeping a certain distance between the end surface of one end of the cutting cylinder and the impact cylinder in a natural state; the impact cylinder is connected with the sand collecting cylinder, an open slot is formed in the side wall of the sand collecting cylinder, and the sand collecting cylinder is used for sampling. The dredging device solves the problems that the conventional dredging device is dredged by a simple squeezing scraping, filing and brushing mode, and dirt in a well is easily accumulated to cause blockage of the dredging device and cannot be used for dredging and sampling.
Description
Technical Field
The utility model relates to the field of oil extraction testing of oil fields, in particular to an injection well dredging and sampling device.
Background
When the underground measurement and adjustment of the oil field are carried out, a silting sand bridge is often encountered, so that the instrument is blocked when moving downwards, and the test progress is influenced. The existing drifting device cannot effectively block the soft scale bridge, and the dredging effect is poor. The soft sand bridge is mainly composed of scale erosion, dead oil, adhesive, silt and polymer gel, and is in the shape of jelly. The prior drifting device is cylindrical, and the dirt on the wall of a well is squeezed and scraped, brushed and flattened through the cylindrical end part, but the simple cylindrical drifting device cannot play a drifting role when the dirt in the well is more, is easily wrapped and accumulated by the simple cylindrical drifting device to cause blockage, seriously forms falling objects, needs to be solved through well washing, hot washing, oil pipe communication operation and other modes, and is higher in cost.
Disclosure of Invention
In view of the above, the utility model provides an injection well dredging and sampling device, which solves the problem that the conventional dredging device is simply squeezed, scraped, brushed and flattened to dredge, so that dirt in a well is easily accumulated to cause blockage of the dredging device and the dredging and sampling cannot be performed.
The utility model provides an injection well dredging sampling device, which comprises: cutting the cylinder;
one end of the cutting cylinder is connected with the impact cylinder in a sliding manner through a connecting mechanism, and the sliding connection is that the cutting cylinder can move back and forth along the directions of two ends while being connected with the impact cylinder;
a reset mechanism is arranged between the cutting cylinder and the impact cylinder, and is used for keeping a certain distance between the end surface of one end of the cutting cylinder and the impact cylinder in a natural state;
the impact cylinder is connected with the sand collecting cylinder, an open slot is formed in the side wall of the sand collecting cylinder, and the sand collecting cylinder is used for sampling.
Preferably, the connection mechanism includes: a hollow fixing bolt;
one end of the hollow fixing bolt is connected with the impact cylinder, and the other end of the hollow fixing bolt is positioned in the cutting cylinder;
the inner wall of the cutting cylinder is provided with a convex edge, the other end of the hollow fixing bolt is provided with a nut, and the nut is positioned between the convex edge in the cutting cylinder and the other end of the cutting cylinder.
Preferably, the method further comprises the following steps: the plunger, the second spring and the middle joint;
one end of the middle joint is connected with the impact cylinder, and the other end of the middle joint is connected with one end of the sand collecting cylinder;
the plunger is positioned in the middle joint, and the side wall of the plunger is attached to the inner wall of the middle joint;
one end of the second spring is connected with the inner wall of the middle joint, and the other end of the second spring is connected with one end, far away from the impact barrel, of the plunger.
Preferably, the outer wall of the intermediate joint is provided with tooth-shaped projections.
Preferably, the reset mechanism is: a first spring;
one end of the first spring is connected with the striking cylinder, the other end of the first spring is connected with the cutting cylinder, and when the first spring is in a natural state, a certain distance is reserved between the end face of one end of the cutting cylinder and the striking cylinder.
Preferably, the side wall of the cutting cylinder is provided with at least one through hole.
Preferably, the end surface of the other end of the cutting cylinder is an inclined end surface.
The utility model has the following beneficial effects:
the utility model provides an injection well dredging sampling device, which aims to solve the problem that the conventional pigging device can not dredge and sample due to blockage of the pigging device caused by accumulation of dirt in a well by dredging in a simple extruding, scraping, filing and smoothing mode.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of an injection well dredging sampling device according to an embodiment of the utility model.
In the figure, 1-a cut cylinder, 2-a through hole, 3-a hollow fixing bolt, 4-a first spring, 5-an impact cylinder, 6-a plunger, 7-an intermediate joint, 8-a second spring, 9-a sand collecting cylinder, 10-an open slot, 11-a dentate bulge and 12-a nut.
Detailed Description
The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth. However, the present invention may be fully understood by those skilled in the art for those parts not described in detail.
Furthermore, those skilled in the art will appreciate that the drawings are provided solely for the purposes of illustrating the utility model, features and advantages thereof, and are not necessarily drawn to scale.
Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".
Fig. 1 is a schematic structural diagram of an injection well dredging sampling device according to an embodiment of the utility model. As shown in fig. 1, an injection well pull through sampling device comprises: a cutting cylinder 1; one end of the cutting cylinder 1 is connected with the impact cylinder 5 in a sliding way through a connecting mechanism, and the sliding connection is that the cutting cylinder 1 can move back and forth along the directions of the two ends while being connected with the impact cylinder 5; a reset mechanism is arranged between the cutting cylinder 1 and the impact cylinder 5 and is used for keeping a certain distance between the end surface of one end of the cutting cylinder 1 and the impact cylinder 5 in a natural state; the impact cylinder 5 is connected with a sand collecting cylinder 9, the side wall of the sand collecting cylinder 9 is provided with an open slot 10, and the sand collecting cylinder 9 is used for sampling.
In the embodiment of the present invention, the cutting cylinder 1 is hollow and has two open ends. When carrying out the drifting sample, connect tungsten counter weight, oscillator and rope fastening with a sand collection section of thick bamboo 9 through upper portion joint, the steel wire is connected to the rope fastening, and the tungsten counter weight is used for increasing striking a section of thick bamboo gravity, and the oscillator is used for producing vibrations to the messenger cuts a section of thick bamboo and meets the position of hindering through in the pit more easily downwards. Go into the pit with fag end cap, tungsten counter weight, oscillator and injection well mediation sampling device down, go into the in-process under, when meetting the hindrance, constantly lift, transfer the steel wire, the steel wire drives a sand collection section of thick bamboo 9 and striking a section of thick bamboo 5 upward movement when lifting, because of canceling release mechanical system effect and cut a section of thick bamboo 1 and strike a section of thick bamboo 5 and be swing joint, the messenger cuts a section of thick bamboo 1 one end terminal surface and strikes and have the certain distance between a section of thick bamboo 5. When the sand collector is lowered, the tungsten balance weight and the oscillator move downwards due to gravity to drive the sand collecting cylinder 9 and the impact cylinder 5 to move downwards; the striking cylinder 5 moves downwards to strike one end face of the cutting cylinder 1, so that the cutting cylinder 1 is knocked, the cutting cylinder 1 vibrates and moves downwards to remove dirt in a well wall, the striking cylinder 5 repeatedly strikes the cutting cylinder 1 in the repeated lifting and lowering operation process of a steel wire, and the cutting cylinder 1 smoothly passes through a well blocking section. During the process of descending into the well, the fluid in the well flows into the sand collection cylinder 9 through the open slot 10 on the side wall of the sand collection cylinder 9, thereby completing the sampling work of the fluid in the well.
In the present invention, the connection mechanism includes: a hollow fixing bolt 3; one end of the hollow fixing bolt 3 is connected with the impact cylinder 5, and the other end is positioned in the cutting cylinder 1; the inner wall of the cutting cylinder 1 is provided with a convex edge, the other end of the hollow fixing bolt 3 is provided with a nut 12, and the nut 12 is positioned between the convex edge in the cutting cylinder 1 and the other end of the cutting cylinder 1.
In the embodiment of the utility model, the interior of the impact cylinder 5 is hollow, two ends of the impact cylinder are open, one end of the impact cylinder 5 is connected with one end of the cutting cylinder 1, and the other end of the impact cylinder is connected with the sand collecting cylinder 9. The hollow fixing bolt 3 is internally provided with a hollow flow passage, and two ends of the flow passage are provided with openings. One end of the bit barrel 1 is inserted into the striking barrel 5 from an opening at one end of the striking barrel 5. One end of the hollow fixing bolt 3 is arranged inside the impact barrel 5, and the inner wall of the impact barrel 5 is connected with the side wall of one end of the hollow fixing bolt 3.
The convex edge on the inner wall of the cutting barrel 1 is annular, the nut 12 at the other end of the hollow fixing bolt 3 is positioned between the convex edge in the cutting barrel 1 and the other end of the cutting barrel 1, the diameter of the nut 12 is larger than the diameter of an inner ring of the annular convex edge, and the nut 12 is used for being clamped at the convex edge in the cutting barrel 1 to prevent the cutting barrel 1 from falling.
When meeting in the well and hindering, transfer the steel wire, striking a section of thick bamboo 5 downstream, striking a section of thick bamboo 5 and drive hollow fixing bolt 3 and nut 12 and cut a section of thick bamboo 1 other end direction motion, nut 12 keeps away from protruding edge, and the part that the inner wall of striking a section of thick bamboo 5 and hollow fixing bolt 3 one end lateral wall are connected strikes the terminal surface of a section of thick bamboo 1 one end downwards, makes and cuts a section of thick bamboo 1 and produce vibrations and downstream. And lifting the steel wire, driving the impact barrel 5 to move upwards by the steel wire, driving the hollow fixing bolt 3 and the nut 12 to move upwards by the impact barrel 5, keeping the position of the cutting barrel 1 still at the moment, driving the cutting barrel 1 to move upwards when the nut 12 moves to contact with the convex edge, and keeping a certain distance between the end surface of one end of the cutting barrel 1 and the side wall of the connecting part of the impact barrel 5 and the hollow fixing bolt 3 at the moment. When the steel wire is placed again, the side wall of the connecting part of the impact cylinder 5 and the hollow fixing bolt 3 impacts one end of the cutting cylinder 1 again to enable the cutting cylinder 1 to move downwards, the impact cylinder 5 is repeatedly knocked to cut the cutting cylinder 1 by repeating the processes, and the cutting cylinder 1 continues to move downwards, so that the purpose of dredging the well is achieved. The hollow fixing bolt 3 and the nut 12 are matched with the convex edge in the cutting barrel 1, so that the cutting barrel 1 is hung on the hollow fixing bolt 3 and prevented from falling, and the other end of the cutting barrel 1 is positioned inside the impact barrel 5 and can move back and forth between one end of the impact barrel 5 and the side wall of the joint of the hollow fixing bolt 3.
In the present invention, the method further comprises: a plunger 6, a second spring 8, and an intermediate joint 7; one end of the middle joint 7 is connected with the impact cylinder 5, and the other end is connected with one end of the sand collecting cylinder 9; the plunger 6 is positioned in the middle joint 7, and the side wall of the plunger 6 is attached to the inner wall of the middle joint 7; one end of the second spring 8 is connected with the inner wall of the middle joint 7, and the other end is connected with one end of the plunger 6 far away from the impact barrel 5.
In the present embodiment, the intermediate joint 7 is hollow and has an opening at one end. When the steel wire is lowered, fluid in the well enters the cutting barrel 1 through the opening at the other end of the cutting barrel 1, the fluid enters the middle joint 7 after passing through the internal flow channel of the hollow fixing bolt 3 and reaches one end of the plunger 6, the plunger 6 is pushed to move upwards, and meanwhile the second spring 8 is compressed. When the steel wire is lifted up, the pressure of the fluid below is reduced, the second spring 8 pushes the plunger 6 to move downwards in the process of restoring the original state, and the plunger 6 pushes the fluid in the impact barrel 5 and the cutting barrel 1 to move downwards. The plunger 6 is used for applying pressure downwards to push the downhole fluid entering the cutting cylinder 1 and the impact cylinder 5 to flow downwards in an accelerated manner in the steel wire lifting process, so that the downhole congestion can be better dredged through the accelerated flow of the fluid.
In the present invention, the intermediate joint 7 has tooth-like projections 11 on its outer wall.
In the embodiment of the utility model, the height of the tooth-shaped bulge 11 is slightly higher than the outer surfaces of the cutting cylinder 1, the impact cylinder 5 and the sand collecting cylinder 9, when a well is lowered, after obstacles in the well are removed through the cutting cylinder 1, the tooth-shaped bulge 11 on the outer wall of the intermediate joint 7 can continuously scrape dirt remained on the inner wall of the well shaft, so that the diameter of the hollow part in the well shaft can be slightly larger than the diameters of the cutting cylinder 1, the impact cylinder 5 and the sand collecting cylinder 9, and when a steel wire is lifted, the dirt on the inner wall of the well shaft is prevented from being tightly attached to the outer walls of the cutting cylinder 1, the impact cylinder 5 and the sand collecting cylinder 9 to cause lifting difficulty.
In the present invention, the reset mechanism is: a first spring 4; one end of the first spring 4 is connected with the striking cylinder 5, the other end of the first spring is connected with the cutting cylinder 1, and when the first spring 4 is in a natural state, a certain distance is reserved between the end surface of one end of the cutting cylinder 1 and the striking cylinder 5.
In the embodiment of the utility model, the first spring 4 is sleeved outside the hollow fixing bolt 3, one end of the first spring 4 is connected with the inner wall of the impact cylinder 5 far away from the opening at one end, and the other end of the first spring 4 is connected with the inner wall of the cutting cylinder 1. When the first spring 4 is in a natural state, the nut 12 is close to one side of the impact cylinder 5 and is attached to one side of the inner convex edge of the cutting cylinder 1, and a certain distance is reserved between the end face of one end of the cutting cylinder 1 and the inner wall of the impact cylinder 5 and the connecting part of the hollow fixing bolt 3.
In the present invention, the cutting cylinder 1 has at least one through hole 2 in a sidewall thereof.
In the embodiment of the utility model, the through hole 2 is used for enabling the cutting cylinder 1 to move downwards to be inserted into silt when dirt in a well contains silt, the silt enters the cutting cylinder 1 from the opening at the other end of the cutting cylinder 1 and then enters the through hole 2, when the steel wire is lifted up, the impact cylinder 5 and the hollow fixing bolt 3 drive the cutting cylinder 1 to move upwards, the silt in the through hole 2 of the cutting cylinder 1 is lifted up by the silt, so that the gap between the silt is increased, and the cutting cylinder 1 can move downwards more easily.
In the present invention, the end surface of the other end of the bit 1 is an inclined end surface.
In the embodiment of the present invention, the inclined end surface makes one side of the end surface of the bit 1 pointed, so that the bit 1 can be more easily inserted into the sludge in the well.
In the embodiment of the utility model, during drifting sampling, one end of the sand collecting barrel 9, which is far away from the middle joint 7, is connected with a tungsten balance weight, an oscillator and a steel wire through an upper joint, the injection well dredging and sampling device is put into the well, the steel wire is put down when meeting a silting position in the putting-down process, the steel wire drives the impact barrel 5 to move downwards, the impact barrel 5 drives the hollow fixing bolt 3 to move downwards, the nut 12 of the hollow fixing bolt 3 moves towards the other end of the cutting barrel 1, and the first spring 4 arranged between the cutting barrel 1 and the impact barrel 5 is compressed. The inner wall of the impact cylinder 5 contacts and impacts with the end face of one end of the cutting cylinder 1, so that the cutting cylinder 1 is knocked, and the other end of the cutting cylinder 1 is inserted into the sludge downwards. When the cutting barrel 1 moves downwards, well fluid enters the interior of the intermediate joint 7 through the cutting barrel 1, the hollow fixing bolt 3 and the impact barrel 5, the plunger 6 is pushed upwards to move, and the first spring 4 connected between the plunger 6 and the intermediate joint 7 is compressed.
And lifting the steel wire, driving the impact barrel 5 to move upwards by the steel wire, reducing the pressure above the impact barrel, restoring the first spring 4, pushing the cut barrel 1 to move in the direction away from the impact barrel 5 until the convex edge of the inner wall of the cut barrel 1 is attached to the nut 12, and keeping a certain distance between the end surface of one end of the cut barrel 1 and the inner wall of the impact barrel 5 connected with the hollow fixing bolt 3. When the underground silt dredging device is lifted, silt in the cutting cylinder 1 and in the through hole 2 in the side wall of the cutting cylinder 1 is turned up, so that a gap is formed between the silt, the second spring 8 pushes the plunger 6 to move downwards in the process of restoring the original state, the middle joint 7 and fluid in the impact cylinder 5 are pushed downwards, and the turned-up silt and the fluid flowing downwards enable the underground silt dredging position to be easier. Repeating the above process, lifting and lowering the steel wire repeatedly until the injection well dredging sampling device passes through the silting position, then in the process, the fluid in the well flows through the cutting cylinder 1, the impact cylinder 5 and the outer side wall of the intermediate joint 7, and finally enters the sand collection cylinder 9 through the open slot 10 on the side wall of the sand collection cylinder 9 to finish sampling.
The utility model can effectively improve the dredging and blockage removing of soft scale bridges and sand blockage in the water injection well, dredge the underground pipe column, facilitate the development of measurement and adjustment work, reduce the well-occupying time of the test, the operation and the well-washing times, and reduce the cost expenditure. Cut a section of thick bamboo 1 and have stronger scavenging action to the well scale erosion, when cutting 1 pointed end of a section of thick bamboo and meet the hindrance, strike a 5 collisions of section of thick bamboo and cut 1 production and strike the effect, kick-back after first spring 4 compression can be with cutting a section of thick bamboo 1 and move down, and it can be through meeting the well section of thick bamboo of hindering to carry to put many times repeatedly, realizes tubular column mediation in the pit. The tooth-shaped protrusions 11 can scrape oil stains and attachments attached to the pipe wall. When a soft sand bridge is encountered, the hard inner core of the sand bridge can be damaged by the cutting cylinder 1 and the inner through hole 2, and the blockage in the well can be dredged more easily by matching with the plunger 6. The sand-collecting cylinder 9 and the open slot 10 can receive the fluid into the cylinder.
The above examples are merely illustrative of the present invention, and are described in more detail, but not intended to limit the scope of the utility model. It should be noted that, for those skilled in the art, various changes, substitutions of equivalents, improvements and the like can be made without departing from the spirit of the utility model, and these are all within the scope of the utility model. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. An injection well pull through sampling device, comprising: a cutting cylinder (1);
one end of the cutting cylinder (1) is connected with the impact cylinder (5) in a sliding manner through a connecting mechanism, and the sliding connection is that the cutting cylinder (1) can move back and forth along the directions of two ends while being connected with the impact cylinder (5);
a reset mechanism is arranged between the cutting cylinder (1) and the impact cylinder (5), and the reset mechanism is used for keeping a certain distance between the end surface of one end of the cutting cylinder (1) and the impact cylinder (5) in a natural state;
the impact barrel (5) is connected with a sand collection barrel (9), an open groove (10) is formed in the side wall of the sand collection barrel (9), and the sand collection barrel (9) is used for sampling.
2. The injection well dredging sampling device of claim 1, wherein the connection mechanism comprises: a hollow fixing bolt (3);
one end of the hollow fixing bolt (3) is connected with the impact cylinder (5), and the other end of the hollow fixing bolt is positioned in the cutting cylinder (1);
the inner wall of the cutting barrel (1) is provided with a convex edge, the other end of the hollow fixing bolt (3) is provided with a nut (12), and the nut (12) is positioned between the convex edge in the cutting barrel (1) and the other end of the cutting barrel (1).
3. The injection well dredging sampling device of claim 2, further comprising: a plunger (6), a second spring (8) and an intermediate joint (7);
one end of the middle joint (7) is connected with the impact cylinder (5), and the other end of the middle joint is connected with one end of the sand collection cylinder (9);
the plunger (6) is positioned inside the intermediate joint (7), and the side wall of the plunger (6) is attached to the inner wall of the intermediate joint (7);
one end of the second spring (8) is connected with the inner wall of the intermediate joint (7), and the other end of the second spring is connected with one end, far away from the impact barrel (5), of the plunger (6).
4. The injection well dredging sampling device of claim 3,
the outer wall of the middle joint (7) is provided with a dentate bulge (11).
5. The injection well dredging sampling device of claim 1, wherein the resetting mechanism is: a first spring (4);
one end of the first spring (4) is connected with the impact cylinder (5), the other end of the first spring is connected with the cutting cylinder (1), and when the first spring (4) is in a natural state, a certain distance is reserved between the end face of one end of the cutting cylinder (1) and the impact cylinder (5).
6. The injection well dredging sampling device of claim 1, wherein:
the side wall of the cutting cylinder (1) is provided with at least one through hole (2).
7. The injection well dredging sampling device of any one of claims 1-6, wherein:
the end face of the other end of the cutting cylinder (1) is an inclined end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123097639.0U CN216381367U (en) | 2021-12-10 | 2021-12-10 | Injection well mediation sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123097639.0U CN216381367U (en) | 2021-12-10 | 2021-12-10 | Injection well mediation sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216381367U true CN216381367U (en) | 2022-04-26 |
Family
ID=81223520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123097639.0U Active CN216381367U (en) | 2021-12-10 | 2021-12-10 | Injection well mediation sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216381367U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117127970A (en) * | 2023-10-26 | 2023-11-28 | 四川圣诺油气工程技术服务有限公司 | Liquid detection sampling open well integrated operation tool and use method |
-
2021
- 2021-12-10 CN CN202123097639.0U patent/CN216381367U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117127970A (en) * | 2023-10-26 | 2023-11-28 | 四川圣诺油气工程技术服务有限公司 | Liquid detection sampling open well integrated operation tool and use method |
| CN117127970B (en) * | 2023-10-26 | 2024-01-12 | 四川圣诺油气工程技术服务有限公司 | Liquid detection sampling open well integrated operation tool and use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216381367U (en) | Injection well mediation sampling device | |
| CN201261021Y (en) | Expansible blade body type positive hole jet flow cleaning device | |
| CN110117986B (en) | Rainwater well structure convenient for garbage cleaning and operation method | |
| CN116892243A (en) | Municipal engineering pipeline drainage dredging device and method | |
| CN205877586U (en) | Pipeline for water conservancy project | |
| CN214364015U (en) | Municipal drainage pipeline dredging device | |
| CN213539234U (en) | Energy-conserving sewage pipe for municipal administration | |
| CN217127974U (en) | Box girder prestressed pipe blocking rubber sleeve | |
| CN213417748U (en) | Hydraulic engineering gate cleaning device | |
| CN110820478B (en) | Sound effect type signal blind way capable of cleaning accumulated water | |
| CN114135223A (en) | Bridge drilling construction equipment and use method thereof | |
| CN210066996U (en) | Underground pipe network water jet dredging construction device | |
| CN208900040U (en) | Filter net type variable diameter tubing nipple | |
| CN113047357A (en) | Mud suction pipe mechanism of air suction dredge for bridge construction | |
| CN216973696U (en) | Sewer pipeline dredging equipment | |
| CN112982626A (en) | Urban road drainage device | |
| CN212671716U (en) | Drifting device | |
| CN113202148A (en) | Basement water conservancy diversion pressure limiting structure | |
| CN207846628U (en) | A kind of novel garden drainage arrangement | |
| CN107938783A (en) | A kind of dredging method for sewer | |
| CN212896731U (en) | Road rainwater inspection shaft based on road design | |
| CN213360075U (en) | Oil scraper for inner wall of petroleum oil pipe | |
| CN214976402U (en) | Drain pipe cleaning device | |
| CN203698900U (en) | Drain tank with dredging device | |
| CN214116880U (en) | Roadbed drainage structure for municipal road construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |