阅读说明：本技术 一种具有预制滤料的水平井 (Horizontal well with prefabricated filter material ) 是由 郭楠 李静文 刘鹏 徐海珍 于小新 吕静 孙于茹 于 2021-07-15 设计创作，主要内容包括：本发明提供了一种具有预制滤料的水平井,属于污染场地修复设备技术领域,包括：预制滤料筛管系统,包括有依次套设的中心管、内层筛管和外层筛管,所述中心管上具有筛孔,所述内层筛管包裹在所述中心管上；所述内层筛管与外层筛管之间填充有滤料；所述外层筛管的两端设有挡板接头。本发明提供的具有预制滤料的水平井,形成预制滤料筛管系统,将完整的预制滤料筛管系统安装至地面下污染待清除位置处,避免了滤料和水平井分开填装不便,同时,使得中心管周围分布的滤料更加均匀。同时,预制滤料筛管系统设置有可以相互独立工作的多个,可以实现水平井的分段气相抽提或药物注射。(The invention provides a horizontal well with prefabricated filter materials, belongs to the technical field of polluted site remediation equipment, and comprises the following components: the prefabricated filter material sieve tube system comprises a central tube, an inner sieve tube and an outer sieve tube which are sequentially sleeved, wherein sieve holes are formed in the central tube, and the inner sieve tube is wrapped on the central tube; a filter material is filled between the inner-layer sieve tube and the outer-layer sieve tube; and baffle plate joints are arranged at two ends of the outer-layer sieve tube. The horizontal well with the prefabricated filter material forms a prefabricated filter material sieve tube system, and the complete prefabricated filter material sieve tube system is arranged at a position to be cleaned of underground pollution, so that the inconvenience of separate filling of the filter material and the horizontal well is avoided, and meanwhile, the filter material distributed around the central tube is more uniform. Meanwhile, a plurality of prefabricated filter material sieve tube systems can work independently, and segmented gas phase extraction or drug injection of the horizontal well can be realized.)

1. A horizontal well with prefabricated filter material, comprising:

the prefabricated filter material sieve tube system (1) comprises a central tube (4), an inner sieve tube and an outer sieve tube which are sequentially sleeved, wherein sieve holes are formed in the central tube (4), and the inner sieve tube is wrapped on the central tube (4);

a filter material (10) is filled between the inner-layer sieve tube and the outer-layer sieve tube;

and baffle plate joints are arranged at two ends of the outer-layer sieve tube.

2. Horizontal well with prefabricated filter material according to claim 1, characterized in that the outer circumference of the outer screen has a grated mesh (8).

3. Horizontal well with prefabricated filter material according to claim 1, characterized in that the screen holes on the base pipe (4) are located on one side of the base pipe (4).

4. Horizontal well with prefabricated filter material according to claim 1, characterized in that circular baffles (2) extending radially from the central pipe (4) are installed at both ends of the central pipe (4), and the diameter of the circular baffles (2) is larger than that of the outer screen pipe.

5. The horizontal well with prefabricated filter material according to claim 4, wherein the prefabricated filter material screen system (1) is provided with a plurality of prefabricated filter material screen systems, and every two prefabricated filter material screen systems (1) are movably connected with each other.

6. Horizontal well with prefabricated filter material according to claim 5, characterized in that a plurality of prefabricated filter material screen systems (1) are arranged independently of each other and a plurality of base pipes (4) are not connected to each other.

7. The horizontal well with prefabricated filter material according to claim 6, further comprising a barrier (3), wherein every two prefabricated filter material screen systems (1) are connected through the barrier (3), and the end of the central pipe (4) is suitable for being connected to the barrier (3);

the circular baffle (2) is arranged on the blocking device (3).

8. The horizontal well with prefabricated filter material according to claim 7, wherein the barriers (3) are provided with a plurality of independently arranged channels (7), wherein one end of one channel (7) in each barrier (3) is communicated with the corresponding prefabricated filter material screen system (1), the other end of the channel is connected with a connecting pipeline (5) through a connecting pair wire, and the connecting pipeline (5) is suitable for being communicated to the outside.

9. The horizontal well with prefabricated filter materials according to claim 6, wherein the central pipe (4) of each prefabricated filter material screen system (1) is communicated with an external group of gas extraction devices and drug injection devices through one channel (7) and a connecting pipeline (5) of the separator (3).

Technical Field

The invention relates to the technical field of polluted site restoration equipment, in particular to a horizontal well with a prefabricated filter material.

Background

With the upgrade, industrial shift and transformation of domestic economy, industrial sites such as steel and chemical industry, solid waste stacking sites, military bases and the like are moved from urban centers to other areas or suburbs, a large number of sites containing halogenated substances, total petroleum hydrocarbons, polycyclic aromatic hydrocarbons and other organic pollutants are left, polluted soil is difficult to recover, and harm is caused to agricultural products and human health.

In-situ chemical oxidation and vapor extraction techniques, as a mature technique, have been successfully applied to soil remediation projects at home and abroad. At present, in-situ chemical oxidation injection wells and vapor extraction wells are mostly vertical wells, and horizontal wells are less in use; compared with a vertical well, the horizontal well has a larger influence range and can be applied to a building area or other advantages in a construction process and the like.

The in-situ chemical oxidation injection well and the gas phase extraction well need to be provided with a certain volume of filter material around the well wall to prevent the soil from blocking the well wall, and for the vertical well, the filter material can be directly poured around the well wall to complete the filling around the well wall under the action of gravity; and for the horizontal well, the filter material can not complete the filling of the well wall under the action of gravity. In the installation process of the horizontal well, a certain thickness of filter material is paved at the bottom of the drilled horizontal hole, the horizontal well is installed in the horizontal hole, and finally the filter material is filled, so that the operation process is complex, and meanwhile, the paving uniformity of the filter material around the horizontal well cannot be guaranteed.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the filter material is not convenient to add in the installation process of a horizontal well in an in-situ chemical oxidation injection well and a gas phase extraction well in the prior art, thereby providing the horizontal well with the prefabricated filter material.

In order to solve the technical problem, the invention provides a horizontal well with a prefabricated filter material, which comprises:

the prefabricated filter material sieve tube system comprises a central tube, an inner sieve tube and an outer sieve tube which are sequentially sleeved, wherein sieve holes are formed in the central tube, and the inner sieve tube is wrapped on the central tube;

a filter material is filled between the inner-layer sieve tube and the outer-layer sieve tube;

and baffle plate joints are arranged at two ends of the outer-layer sieve tube.

Optionally, the outer circumferential surface of the outer screen pipe is provided with a planer wire-shaped screen hole.

Optionally, the screen holes on the base pipe are located on one side of the base pipe.

Optionally, circular baffles extending out along the radial direction of the central pipe are installed at two ends of the central pipe, and the diameter of each circular baffle is larger than that of the outer-layer sieve pipe.

Optionally, the prefabricated filter material sieve tube system is provided with a plurality of prefabricated filter material sieve tube systems, and every two prefabricated filter material sieve tube systems are movably connected with each other.

Optionally, the prefabricated filter material screen pipe systems are arranged independently, and the central pipes are not communicated with each other.

Optionally, the filter screen system further comprises a blocking device, each two prefabricated filter screen systems are connected through the blocking device, and the end of the central pipe is suitable for being connected to the blocking device;

the circular baffle is installed on the blocker.

Optionally, the blocking devices are provided with a plurality of independently arranged channels, wherein one end of one channel in each blocking device is communicated with the corresponding prefabricated filter material sieve tube system, the other end of the channel is connected with a connecting pipeline through a connecting pair wire, and the connecting pipeline is suitable for being communicated to the outside.

Optionally, the central tube of each prefabricated filter material sieve tube system is communicated with a group of external gas extraction devices and drug injection devices through one channel and a connecting pipeline on the separator.

The technical scheme of the invention has the following advantages:

1. according to the horizontal well with the prefabricated filter material, the filter material is filled between the outer-layer sieve tube and the inner-layer sieve tube, the two ends of the outer-layer sieve tube are blocked by the blocking plates, the filled filter material is wrapped outside the central tube, a prefabricated filter material sieve tube system is formed, the complete prefabricated filter material sieve tube system is installed to a position to be cleaned of underground pollution, the inconvenience of separate filling of the filter material and the horizontal well is avoided, and meanwhile, the filter material distributed around the central tube is more uniform.

2. The horizontal well with the prefabricated filter material is provided with the thread-shaped sieve pores on the outer circumferential surface of the outer sieve tube, so that the air permeability can be realized, and underground soil can be prevented from entering the filter material through the outer sieve tube.

3. According to the horizontal well with the prefabricated filter material, the circular baffles are arranged at the two ends of the central pipe and can prevent the medicine from flowing to other areas, so that the injected medicine is injected in a directional manner, and the injection is more efficient. The sieve mesh on the center tube is located one side of center tube, can make the medicine flow to specific contaminated area, improves the utilization ratio of medicine, avoids medicine commodity circulation to pollution-free area, causes the medicine extravagant.

4. The horizontal well with the prefabricated filter materials is characterized in that a plurality of prefabricated filter material sieve tube systems are arranged, each prefabricated filter material sieve tube system is independently connected to an external group of gas phase extraction device and drug injection device through a channel and a connecting pipeline in a separator to form a plurality of groups of gas phase extraction devices and drug injection devices which are independently arranged, and each group of prefabricated filter material sieve tube systems are not interfered with each other; meanwhile, each system is arranged independently, so that the whole horizontal well can be divided into a plurality of injection/extraction small sections, the situation that the injection pressure or the pumping pressure is insufficient due to the overlong well pipe of the horizontal well is avoided, and the pressure supply in the horizontal well is ensured.

5. According to the horizontal well with the prefabricated filter materials, the prefabricated filter material sieve tube systems are multiple and are arranged independently, independent injection of drugs can be achieved, and whether the prefabricated filter material sieve tube system is subjected to drug injection or vapor extraction or not can be considered according to the size of a pollution area; meanwhile, the number of the prefabricated filter material sieve tube systems can be adjusted according to the size of the polluted area, so that the overall length of the horizontal well is adjusted, and the pollution area is treated more flexibly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a horizontal well with prefabricated filter material according to an embodiment of the present invention;

FIG. 2 is a schematic view of a connection configuration of a plurality of prefabricated filter material screen systems according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a center tube provided in accordance with an embodiment of the present invention;

FIG. 4 is a left side view of a horizontal well with prefabricated filter material provided by an embodiment of the present invention;

FIG. 5 is a schematic view of a connection structure of the blocking device and the connection pipe according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of the blocking device provided by the embodiment of the present invention and the blocking bolt connected thereto;

FIG. 7 is a schematic structural view of the barrier with the connecting pair wires connected thereto according to the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a connecting pipe according to an embodiment of the present invention;

FIG. 9 is a schematic view of a first alternative arrangement of passages in a blocker according to embodiments of the present invention;

fig. 10 is a schematic view of a second alternative arrangement of passages in a blocker according to an embodiment of the present invention.

Description of reference numerals:

1. prefabricating a filter material sieve tube system; 2. a circular baffle; 3. a barrier; 4. a central tube; 5. connecting a pipeline; 6. plugging the bolt; 7. a channel; 8. planing a filamentous sieve pore; 9. a plugging plate; 10. filtering the material; 11. and connecting the paired wires.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

This embodiment provides a specific implementation mode of horizontal well with prefabricated filter material 10, as shown in fig. 1, the parcel has inner screen pipe and outer screen pipe in the center tube 4 outside, it has filter material 10 to fill between outer screen pipe and the inner screen pipe, set up closure plate 9 at the both ends of outer screen pipe, make the even distribution of filter material 10 in the center tube 4 outside, prefabricated filter material screen pipe system 1 that makes can directly stretch into to the underground, through pipe connection to subaerial gaseous phase extraction device and medicine injection device can use, need not to pack filter material 10.

Specifically, the outer screen pipe is provided with the planed wire-shaped screen holes 8, so that the quantity of underground soil entering the filter material 10 through the outer screen pipe can be reduced as much as possible while the air is ventilated.

As shown in fig. 2, when there are a plurality of prefabricated filter material screen systems 1 in this embodiment, they may be connected by a blocking device 3, and a channel 7 is provided in the blocking device 3, so that the central pipe 4 may be communicated to the outside. Threaded joints are provided at both ends of the central tube 4, which can be connected into female threaded joints at the ends of the obstructor 3.

Specifically, the plurality of prefabricated filter material screen pipe systems 1 are arranged independently, and in this embodiment, three prefabricated filter material screen pipe systems 1 are provided as an example for description. As shown in fig. 2, the horizontal well comprises three prefabricated filter material sieve tube systems 1, the prefabricated filter material sieve tube systems 1 are connected together through a blocking device 3, and the blocking device 3 is numbered from left to right: first number, second number, third number, fourth number. The channels 7 on the first separator 3 connected with the left end of the left prefabricated filter material sieve tube system 1 are all connected with plugging bolts 6 as shown in fig. 6; the right end of the prefabricated filter material screen pipe system 1 on the left side is communicated with one channel 7 of the second separator 3 connected with the right end of the prefabricated filter material screen pipe system 1 on the left side, namely, the channel 7 towards the port of the prefabricated filter material screen pipe system 1 on the left side is communicated with the central pipe 4 in the prefabricated filter material 10 system on the left side, namely, the channel 7 of the second separator 3 corresponds to the prefabricated filter material screen pipe system 1 on the left side, and the ports of the other channels 7, located on the left side, of the second separator 3 are connected with the plugging bolts 6.

The left end of the middle prefabricated filter material screen pipe system 1 is connected with the second separator 3, the port of a channel 7 below the right end of the second separator 3 is connected with a connecting pipeline 5 through a connecting pair wire 11, the connecting pipeline 5 penetrates through a central pipe 4 of the middle prefabricated filter material screen pipe system 1, and the right end of the connecting pipeline 5 is connected with the third separator 3 through the connecting pair wire 11, so that the connecting pipeline 5 only passes through the central pipe 4 of the middle prefabricated filter material screen pipe system 1 and is not communicated with the inner space of the central pipe 4 of the middle prefabricated filter material screen pipe system 1; the other channels 7 at the right end of the second separator 3 are connected with plugging bolts 6, and the space of the central pipe 4 of the middle prefabricated filter material sieve pipe system 1 is separated from the space of the central pipe 4 of the left prefabricated filter material sieve pipe system 1; the right end of a central pipe 4 of the middle prefabricated filter material screen pipe system 1 is connected with a third separator 3, and a port on the left end of the third separator 3 is not provided with any port, so that a channel 7 above the inside of the third separator 3 is communicated with the central pipe 4 of the middle prefabricated filter material screen pipe system 1, namely the channel 7 above the inside of the third separator 3 corresponds to the middle prefabricated filter material screen pipe system 1.

The left end of the right prefabricated filter material sieve tube system 1 is connected with a third separator 3, the upper and lower ports of the right end of the third separator 3 are connected with connecting pipelines 5 through connecting pair wires 11, the right ends of the two connecting pipelines 5 are connected with a fourth separator 3 through connecting pair wires 11, the inner spaces of the two connecting pipelines 5 are not communicated with the inner space of a central tube 4 of the right prefabricated filter material sieve tube system 1, namely a channel 7 in the middle of the fourth separator 3 corresponds to the right prefabricated filter material sieve tube system 1; the right end of the central pipe 4 of the right prefabricated filter material screen pipe system 1 is connected with the fourth separator 3, the middle port of the left end of the fourth separator 3 is communicated with the central pipe 4 of the right prefabricated filter material screen pipe system 1, and the ports of the channel 7 of the right end of the fourth separator 3 are connected with the connecting pipeline 5 through the connecting pair wires 11, as shown in fig. 7. Each central tube 4 is connected to the outside through a channel 7 and a connecting pipe 5 inside the blocker 3, and each group of connecting pipes 5 is connected with a group of vapor extraction device and drug injection device. The mutual independent arrangement of a plurality of prefabricated filter material screen pipe systems 1 is realized, and the central pipes 4 in each prefabricated filter material screen pipe system 1 are not communicated with each other. Form a plurality of groups of independent vapor extraction systems and drug injection systems. Each group of prefabricated filter material sieve tube systems 1 can independently realize gas phase extraction or drug injection.

As an alternative embodiment, the left end blocking device 3 may be a sealing plate, and the circular baffle 2 may be mounted on the sealing plate as long as the left end of the central tube 4 is blocked.

In this embodiment, the passages 7 in the blocking device 3 are three and arranged up and down, and they may also be arranged in a delta shape, as shown in fig. 9; the number of the plurality of the grooves can be more than three, and as shown in fig. 10, the number of the grooves can be four, and the grooves are arranged in a matrix.

As shown in fig. 3, the central tube 4 is a pipe with single-side sieve holes, and the sieve holes are only arranged on one side of the central tube 4, so that the medicine can flow to a specific polluted area, the medicine is prevented from directly diffusing around the central tube 4, and the utilization rate of the medicine is improved.

As shown in figures 2 and 4, circular baffles 2 are arranged at two ends of a prefabricated filter material sieve tube system 1, the circular baffles 2 are installed on a blocking device 3, and the circular baffles 2 can prevent drugs from diffusing to two ends of a central tube 4, so that the drugs can be radially diffused along the central tube 4 as much as possible, and the drug release accuracy is improved.

As shown in fig. 5, the blocking device 3 is provided with a plurality of passages 7 inside, and the passages 7 are independent of each other, and the port of the passage 7 can be provided with the blocking bolt 6, the connecting pair wire 11, or nothing. When the port of the channel 7 is provided with the plugging bolt 6, the channel 7 is plugged, and gas and medicine can not pass through; when the channel 7 is provided with the connecting counter wires 11, as shown in fig. 8, the connecting pipelines 5 can be connected through the connecting counter wires 11, and the central pipes 4 which are the same as the connecting pipelines 5 can be communicated to the outside; channel 7 ports when nothing is installed, channel 7 communicates with its adjacent center tube 4.

In this embodiment, be threaded swing joint between center tube 4 and separation ware 3, between connecting tube 5 and the connection pair silk 11 and between connection pair silk 11 and separation ware 3, dismantle simple to operate, the efficiency of construction is high.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.