A monitoring well with separate layer water taking device

Abstract

The utility model discloses a layered water taking device for monitoring well, including through the multiple packer base of elevator's down, and each packer base is connected through the pull rope axial connection and sets up the setting component and realizes the layered setting in the well, the sampling hole of setting layer mark is set up in the top of packer base, is equipped with annular cavity and the layer changing disc in the inside, and the through -hole is communicated with different sampling hole through waterproof motor drive layer changing disc rotation, and the specific layer deep water sample extraction is realized in cooperation hose, through modular layered structure and rotary layer changing component, realize single time downhole multistage precision sampling, avoid the interference between layers, improve sampling efficiency and data accuracy, have self -cleaning and corrosion -resistant characteristics simultaneously, adapt complex geologic environment, convenient operation and low maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of sampling and testing equipment technology, specifically to a stratified water intake device for monitoring wells. Background Technology

[0002] In the field of groundwater monitoring, traditional stratified sampling techniques usually require multiple deployments of equipment or the use of fixed stratified tubing, which presents problems such as complex operation, high risk of cross-contamination between layers, and difficulty in deep sampling.

[0003] In existing technologies, well packers mostly rely on mechanical expansion or chemical packing, which have poor setting stability and are difficult to adapt to complex well diameters; sampling components usually adopt a fixed flow channel design, which cannot dynamically switch sampling levels, resulting in low equipment reuse rate.

[0004] Therefore, it is necessary to provide a stratified water intake device for monitoring wells to solve the problems mentioned in the background art. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stratified water intake device for monitoring wells, comprising: a lifter and a pump set installed at the upper end of the wellhead; the output end of the lifter is connected to a packer via a pull rope; several packers are spaced apart along the axial direction of the pull rope; each packer is connected to the other via a pull rope; and a setting assembly is provided on the outer periphery of the packer for long-term setting of the packer in the well.

[0006] The top of the packer has several marked sampling holes vertically extending circumferentially. An annular cavity is coaxially formed inside the packer and communicates with each of the sampling holes. The upper end of any sampling hole at the top of the uppermost packer is connected to the pump unit via a flexible tube. The sampling holes at each level are sequentially connected to the top sampling hole via the flexible tube to meet the requirements of water sample extraction at different separation levels.

[0007] Sealing plugs are used to seal sampling holes that are not involved in water sample extraction.

[0008] A layer-changing assembly, installed within the annular cavity, is used to connect the upper and lower hoses of each of the packer seats for extracting water samples from different depths.

[0009] Preferably, the layer-swapping component includes:

[0010] The layer-changing disc has a rotating seal disposed within the annular cavity. A boss is coaxially disposed on the top of the layer-changing disc, and the boss is positioned within the annular cavity. A confluence cavity is formed between the boss and the annular cavity. A through hole is provided on the top of the layer-changing disc corresponding to the sampling hole position to allow water flow between different layers of hoses.

[0011] A waterproof motor is installed at the bottom of the sealing base, and its output end passes through the sealing base and is coaxially connected to the layer changing plate;

[0012] The water-changing disk is rotated by a waterproof motor, which connects the through hole with the different sampling holes at its bottom, enabling the extraction of water samples from different depths.

[0013] Preferably, a sealing ring is installed around the periphery of the layer-changing disc to achieve rotational sealing between the layer-changing disc and the annular cavity.

[0014] Preferably, the identifier is a mark that indicates quantity or hierarchy.

[0015] Preferably, the outer periphery of the spacer seat is provided with an annular groove, and the top of the inner side of the annular groove is provided with an annular drive cavity, and the seat assembly is installed in the annular groove and the drive cavity.

[0016] Preferably, the setting assembly includes:

[0017] A drive cylinder is provided with a sliding seal inside the drive chamber. The top of the drive chamber is connected to the annular cavity and has an installation hole. A one-way valve is installed in the installation hole for unidirectionally filling the drive chamber with a pressure medium.

[0018] An elastic support sleeve is fitted inside the annular groove. Several limiting plates are evenly embedded in the upper and lower end faces of the elastic support sleeve along the circumference of the well wall. The limiting plates are located below the drive slide and are fixedly connected to the drive slide.

[0019] In this process, a pressure medium is introduced into the drive chamber through a one-way valve, causing the drive slide to move downward and compress the elastic support sleeve so that it bulges out of the well wall to make contact with the well wall for setting.

[0020] Preferably, the limiting plate includes:

[0021] A sleeve plate is embedded at the upper and lower ends of the elastic support sleeve, and the upper sleeve plate is fixedly connected to the bottom end of the drive slide cylinder.

[0022] A sliding plate is slidably inserted into the sleeve plate towards the well wall, and the bottom of the sliding plate is elastically connected to the bottom of the sleeve plate by a spring.

[0023] A buffer pad is fixed to the slide plate on the side facing the well wall.

[0024] Preferably, the limiting plates at the upper and lower ends are staggered.

[0025] Preferably, the elastic support sleeve is made of an elastic, wear-resistant, and corrosion-resistant material.

[0026] Compared with the prior art, this utility model provides a stratified water intake device for monitoring wells, which has the following beneficial effects:

[0027] 1. By axially arranging the packer and setting assembly and designing the setting seal, physical separation of the well space is achieved. With the rotation of the layer-changing plate to switch sampling holes, multi-level water sample extraction can be completed in a single well run, avoiding inter-layer interference and improving data accuracy.

[0028] 2. The modular structure and electric layer-changing mechanism allow for switching of sampling layers without repeated raising and lowering of equipment, significantly shortening the operation cycle and reducing labor and time costs; at the same time, the number of packer seats can be flexibly adjusted to adapt to different well depths. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a stratified water intake device for monitoring wells;

[0030] Figure 2 A cross-sectional schematic diagram of a layer-switching component in a stratified water intake device for monitoring wells;

[0031] Figure 3 A schematic cross-sectional view of the limiting plate of a stratified water intake device for monitoring wells;

[0032] In the diagram: 1. Sealing seat; 2. Sealing assembly; 3. Pull rope; 4. Layer changing assembly; 5. Sealing plug; 6. Hose; 7. Waterproof motor; 8. Annular groove; 9. Mark; 10. Annular cavity; 11. Layer changing disc; 12. Boss; 13. Through hole; 14. One-way valve; 15. Sealing ring; 16. Drive cavity; 17. Drive slide; 18. Elastic support sleeve; 19. Limiting plate; 20. Sleeve plate; 21. Slide plate; 22. Spring; 23. Buffer pad. Detailed Implementation

[0033] Please see Figure 1-3 This utility model provides a stratified water intake device for monitoring wells, including: a lifter and a pump set installed at the upper end of the wellhead. The output end of the lifter is connected to a sealing seat 1 via a pull rope 3. Several sealing seats 1 are spaced apart along the axial direction of the pull rope 3. Each sealing seat 1 is connected to the other via the pull rope 3. A setting assembly 2 is provided on the outer periphery of the sealing seat 1 for long-term setting of the sealing seat 1 in the well.

[0034] The top of the packer 1 has several marked sampling holes vertically extending circumferentially. An annular cavity 10 is coaxially formed inside the packer 1 and communicates with each of the sampling holes. The upper end of any sampling hole at the top of the uppermost packer 1 is connected to the pump unit through a flexible hose 6. The sampling holes of each level are sequentially connected to the top sampling hole through the flexible hose 6 to meet the requirements of water sample extraction at different separation levels. The flexible hose 6 is a pressure-resistant flexible hose 6.

[0035] Sealing plug 5 is used to seal sampling holes that do not involve water sample extraction;

[0036] The layer-changing component 4 is installed inside the annular cavity 10 and is used to connect the upper and lower end hoses 6 of each of the packer seats 1 to extract water samples from different depths.

[0037] Specifically, the lifting device is a hoisting device, the pull rope is a corrosion-resistant steel wire rope, and the pump set includes an air pump and a bidirectional centrifugal pump.

[0038] It should be explained that during use, each packer seat 1 is connected by a pull rope 3, and the hose 6 is installed according to the packer seat 1 hierarchy. Then, the installed packer seat 1 is lowered to the designated depth using a lifter, and then the setting assembly 2 is controlled sequentially from bottom to top to set the packer seat 1 in the well, thus achieving water stratification in the well. When it is necessary to extract water samples from a specific layer, the hose 6 is connected to the designated water layer using the layer-changing assembly 4, and finally the water sample is extracted by the pump set, completing the stratification and fixed-layer water extraction.

[0039] Furthermore, the identifier is a symbol 9 that has a quantity or hierarchy indication function.

[0040] Specifically, the mark 9 can be a number or a corresponding number of marking points, marking lines, etc. Taking the installation of 3 sets of packer seats 1 as an example, the top packer seat 1 is set to be layer 1, layer 2, and layer 3 from top to bottom, and the sampling holes are marked in sequence along the circumference as hole 1, hole 2, hole 3, hole 4, hole 5, etc.

[0041] Install the hose 6 on the upper end of any of the sampling holes marked 9 on the topmost packer 1. Each packer 1 at each level takes samples through the sampling hole corresponding to its level. That is, during installation, holes 2 and 3 between level 1 and level 2 are connected by the hose 6, and holes 3 between level 2 and level 3 are connected by the hose 6. This allows the sampling holes of each level to be sequentially connected to the top sampling hole through the hose 6, thus satisfying the water sample extraction of different separation levels.

[0042] It should be noted that, according to the above, all other sampling holes unrelated to water intake are sealed with sealing plug 5. Specifically, the sealing plug 5 is a steel threaded plug.

[0043] Furthermore, the layer-switching component 4 includes:

[0044] The layer-changing disc 11 is rotatably sealed within the annular cavity 10. A boss 12 is coaxially fixed on the top of the layer-changing disc 11. The boss 12 is positioned within the annular cavity 10, and a confluence cavity is formed between the boss 12 and the annular cavity 10. A through hole 13 is provided on the top of the layer-changing disc 11 corresponding to the sampling hole position to allow water flow between different levels of hoses 6.

[0045] A waterproof motor 7 is installed at the bottom of the sealing base 1, and its output end passes through the sealing base 1 and is coaxially connected to the layer changing plate 11;

[0046] The waterproof motor 7 drives the layer-changing disk 11 to rotate, so that the through hole 13 is connected to the different sampling holes at its bottom, thereby enabling the extraction of water samples at different depths.

[0047] Specifically, when water samples need to be extracted from the corresponding level, the waterproof motor 7 drives the layer-changing plate 11 to rotate, so that the through hole 13 is connected to the corresponding sampling hole, thereby realizing the extraction of water samples from the water body of that level; for example, when water needs to be taken from the water body at three points in the level, the waterproof motor 7 of each level is controlled to drive the through hole 13 on the layer-changing plate 11 to rotate to the third hole, so that the uppermost hose 6 is connected to the water body in the third level, thereby realizing the extraction of water from the water body in the third level.

[0048] To avoid mixing of water samples from different layers, the water sample from the previous layer in the pipe can be discharged first (the water in the pipe is continuously discharged for a set time to ensure that the water sample comes from the target layer) before sampling.

[0049] Furthermore, a sealing ring 15 is installed around the periphery of the layer-changing disc 11 to achieve rotational sealing between the layer-changing disc 11 and the annular cavity 10.

[0050] Furthermore, an annular groove 8 is provided on the outer periphery of the sealing seat 1, and an annular drive cavity 16 is provided on the top inner side of the annular groove 8. The sealing assembly 2 is installed in the annular groove 8 and the drive cavity 16.

[0051] Furthermore, the setting assembly 2 includes:

[0052] The drive cylinder 17 is slidably sealed inside the drive cavity 16. The top of the drive cavity 16 is connected to the annular cavity 10 and has an installation hole. A one-way valve 14 is installed in the installation hole for unidirectionally filling the drive cavity 16 with pressure medium.

[0053] An elastic support sleeve 18 is fitted inside the annular groove 8. Several limiting plates 19 are evenly embedded in the upper and lower end faces of the elastic support sleeve 18 along the circumference facing the well wall. The limiting plates 19 are located below the drive slide cylinder 17 and are fixedly connected to the drive slide cylinder 17.

[0054] In this process, a pressure medium is introduced into the drive chamber 16 through the one-way valve 14, causing the drive slide 17 to move downward and compress the elastic support sleeve 18 so that it bulges out of the well wall to contact and set.

[0055] It should be noted that, in the initial state, the elastic support sleeve 18 is located inside the limiting plate 19. The pump group fills the hose 6 with pressure medium (gas or liquid). By using the layer replacement assembly 4 to seal the sampling holes of each packer seat 1 in sequence, the setting assembly 2 is set from bottom to top. Specifically, the waterproof motor 7 drives the layer replacement disc 11 to block the through hole 13, so that the pressure medium enters the drive chamber 16 through the one-way valve 14. The pressure medium drives the drive slide 17 to move down, compressing the elastic support sleeve 18 so that it bulges out of the well wall to contact the setting. The limiting plate 19 prevents the elastic support sleeve 18 from expanding too much axially, reducing the setting diameter range.

[0056] Once the sealing is complete, to avoid interference from the pressure medium on the subsequent testing of water samples, a harmless pressure medium can be used, or water from each layer can be extracted to clean the inside of the device until the test results meet the standards.

[0057] Furthermore, the limiting plate 19 includes:

[0058] Sleeve plate 20 is embedded at the upper and lower ends of the elastic support sleeve 18, and the upper end of sleeve plate 20 is fixedly connected to the bottom end of the drive slide cylinder 17.

[0059] The sliding plate 21 is slidably inserted into the sleeve plate 20 towards the well wall, and the bottom of the sliding plate 21 is elastically connected to the bottom of the sleeve plate 20 by a spring 22;

[0060] A buffer pad 23 is fixed to the slide plate 21 on the side facing the well wall.

[0061] It should be explained that the retractable limiting plate 19 can automatically extend and retract to avoid getting stuck when the device is lowered into the well; at the same time, it can automatically extend according to the diameter of the well to expand and limit the elastic support sleeve 18.

[0062] Preferably, a pressure monitoring unit is provided in the drive cavity 16 to facilitate monitoring of the setting condition.

[0063] Furthermore, the upper and lower limit plates 19 are staggered to improve the limiting effect of the limit plates 19 on the elastic support sleeve 18.

[0064] Furthermore, the seat assembly 2 is made of a wear-resistant and corrosion-resistant material.

[0065] Specifically, the wear-resistant and corrosion-resistant material can be: fluororubber, polyurethane, hydrogenated nitrile rubber, etc.

[0066] In practice, each packer seat 1 is connected by a pull rope 3, and hoses 6 are installed according to the packer seat 1 hierarchy. Then, the installed packer seat 1 is lowered to the designated depth using a lifter. Then, the setting assembly 2 is controlled sequentially from bottom to top to set the packer seat 1 in the well, thus achieving water stratification in the well. When it is necessary to extract water samples from a specific layer, the hose 6 is connected to the designated water layer using the layer-changing assembly 4. Finally, the water sample is extracted using a pump set, completing the stratified and fixed-layer water extraction.

[0067] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A monitoring well comprising a separate layer water taking device, comprising: The lifting device and pump set installed at the upper end of the wellhead are characterized in that the output end of the lifting device is connected to a packer (1) by a pull rope (3), and a plurality of packers (1) are arranged at intervals along the axial direction of the pull rope (3). Each packer (1) is connected to the other by the pull rope (3). A setting assembly (2) is provided on the outer periphery of the packer (1) for long-term setting of the packer (1) in the well. The top of the packer (1) has several marked sampling holes vertically through it along the circumference. An annular cavity (10) is coaxially formed inside the packer (1) and communicates with each of the sampling holes. The upper end of any sampling hole at the top of the uppermost packer (1) is connected to the pump group through a hose (6). The sampling holes of each level are connected to the top sampling hole through the hose (6) in sequence to meet the requirements of water sample extraction at different separation levels. A sealing plug (5) is used to seal sampling holes that do not involve water sample extraction; The layer-changing assembly (4) is installed in the annular cavity (10) and is used to connect the upper and lower hoses (6) of each of the packer seats (1) to extract water samples from different depths.

2. The layered water taking device for monitoring well according to claim 1, characterized in that, The layer-changing component (4) includes: A layer-changing disc (11) is rotatably sealed inside the annular cavity (10). A boss (12) is coaxially provided on the top of the layer-changing disc (11). The boss (12) is located inside the annular cavity (10). A confluence cavity is formed between the boss (12) and the annular cavity (10). A through hole (13) is provided on the top of the layer-changing disc (11) corresponding to the sampling hole position, for realizing water flow between different levels of hoses (6). A waterproof motor (7) is installed at the bottom of the sealing seat (1), and its output end passes through the sealing seat (1) and is coaxially connected to the layer changing plate (11); The waterproof motor (7) drives the layer-changing disk (11) to rotate, so that the through hole (13) is connected to the different sampling holes at its bottom, thereby realizing the extraction of water samples at different depths.

3. The zoned water intake apparatus for monitoring wells of claim 2, wherein, A sealing ring (15) is installed around the periphery of the layer-changing disc (11) to achieve rotational sealing between the layer-changing disc (11) and the annular cavity (10).

4. The layered water taking device for monitoring well according to claim 1, characterized in that, The identifier is a symbol that has the function of indicating quantity or hierarchy (9).

5. The layered water taking device for monitoring well according to claim 1, characterized in that, The outer periphery of the sealing seat (1) is provided with an annular groove (8), and the top of the inner side of the annular groove (8) is provided with an annular drive cavity (16). The seat assembly (2) is installed in the annular groove (8) and the drive cavity (16).

6. A stratified water intake device for monitoring wells according to claim 5, characterized in that, The setting assembly (2) includes: The drive slide (17) is slidably sealed inside the drive cavity (16). The top of the drive cavity (16) is connected to the annular cavity (10) and has an installation hole. A one-way valve (14) is installed in the installation hole for unidirectionally filling the drive cavity (16) with pressure medium. An elastic support sleeve (18) is fitted inside the annular groove (8). Several limiting plates (19) are evenly embedded in the upper and lower end faces of the elastic support sleeve (18) along the circumferential direction facing the well wall. The limiting plates (19) are located below the drive slide (17) and are fixedly connected to the drive slide (17). In this process, a pressure medium is introduced into the drive chamber (16) through a one-way valve (14), causing the drive slide (17) to move downward and compress the elastic support sleeve (18) so that it bulges out of the well wall to contact and set.

7. A stratified water intake device for monitoring wells according to claim 6, characterized in that, The limiting plate (19) includes: A sleeve plate (20) is embedded at the upper and lower ends of the elastic support sleeve (18), and the upper end of the sleeve plate (20) is fixedly connected to the bottom end of the drive slide (17); A sliding plate (21) is slidably inserted into the sleeve plate (20) facing the well wall, and the bottom of the sliding plate (21) is elastically connected to the bottom of the sleeve plate (20) by a spring (22); A buffer pad (23) is fixed to the slide plate (21) on the side facing the well wall.

8. A stratified water intake device for monitoring wells according to claim 6, characterized in that, The limiting plates (19) at the upper and lower ends are staggered.

9. A stratified water intake device for monitoring wells according to claim 6, characterized in that, The elastic support sleeve (18) is made of elastic, wear-resistant and corrosion-resistant material.

Images