Karez type salt lake underground brine mining system and cleaning method thereof
By introducing well washing channels and inclined sections into the underground brine harvesting system of the Salt Lake, and using high-pressure brine to rinse and clean the cable, the problem of horizontal well blockage is solved, and efficient brine collection and system maintenance is achieved.
Patent Information
- Application Number
- CN202411994561.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-05-13
AI Technical Summary
In the existing underground salt lake halogen production system, horizontal wells are easily blocked due to residue accumulation, lack effective dredging methods, which affects the efficiency of halogen production and system life.
The Kaner-type salt lake underground halogen production system is adopted, including the well washing channel and the inclined section, and the horizontal well is washed with high-pressure brine, and the horizontal well is cleaned in combination with the reciprocating movement of the cleaning cable.
Effectively unblock horizontal wells, improve the efficiency of halogen production, extend the service life of the system, and ensure smooth flow of brine into the halogen production wells.
Smart Images
Figure CN119981827A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of brine mining methods, and in particular to a karez-type salt lake underground brine mining system and a cleaning method thereof. Background Art
[0002] Brine is a type of groundwater rich in salt and other minerals. The underground brine of salt lakes is mainly found in the intercrystalline pores of salt sedimentary layers deposited during the development and evolution of salt lakes. Due to changes in the underground sedimentary environment of salt lakes, multiple salt sedimentary layers and clay debris sedimentary layers are deposited underground in the salt lakes, which in turn form an upper layer of potential brine aquifers and multiple lower confined brine aquifers, forming an aquifer group. From top to bottom, there is a trend of smaller intercrystalline pores, worse hydraulic connections, and weaker water-richness. In the early stages of mining production, according to the differences in geological structures and hydrogeological conditions of different salt lakes, salt lake mining companies currently mainly use brine mining channels and vertical brine mining wells to mine brine.
[0003] There is a salt lake underground brine production system in the prior art, including a brine production well, a vertical well and a horizontal well. A horizontal well is set in the lower brine layer underground in the salt lake, and the vertical well extending vertically downward is connected to the horizontal well. The vertical well can connect the vertically pressurized brine layers to increase the hydraulic connection between the brine layers, so that the brine in the upper pressurized brine layer no longer seeps through the formation to the brine production well, but flows into the horizontal well from top to bottom. The horizontal well thus forms an advantageous water guide corridor, and the collected brine is formed into a pipeline-like flow and input into the brine production well.
[0004] Regarding the above-mentioned related technologies, during the process of collecting brine, vertical wells will have residues or mineral debris falling. As the use time increases, the residues gradually accumulate at the bottom of the horizontal wells, causing the horizontal well sections to become blocked, resulting in reduced water conductivity. Eventually, the horizontal wells are completely blocked. After the residues or salts are enriched in the horizontal wells and cause blockage, the existing technology lacks an effective way to dredge them. Summary of the invention
[0005] In order to improve the defect of the prior art that there is a lack of effective means for dredging horizontal wells, the present application provides a karez-type salt lake underground brine mining system and a cleaning method thereof.
[0006] The following technical solutions are adopted: First, The present application provides a karez-type salt lake underground brine extraction system, comprising mutually connected brine extraction wells and horizontal wells, and a plurality of vertical shafts connected to the horizontal wells, characterized in that: it also comprises a well washing channel and at least one inclined section; one end of the well washing channel is connected to the horizontal well, and the other end is connected to the brine extraction well; the inclined section extends obliquely from the ground in a direction gradually approaching the brine extraction well, and is connected to the horizontal well.
[0007] By adopting the above technical solution, the system realizes the effective collection of underground brine in the salt lake through interconnected brine wells, horizontal wells and vertical wells, in conjunction with well-washing channels and deflection sections. The design of the well-washing channel uses high-pressure brine to flush the horizontal wells, thereby dredging the horizontal wells.
[0008] Optionally, the well washing channel is arranged below the horizontal well; one end of the well washing channel is connected to the brine production well, and the other end extends along the length direction of the horizontal well; the well washing channel is connected to the horizontal well at the same inclination section; a number of the vertical shafts penetrate the horizontal well and are connected to the well washing channel.
[0009] By adopting the above technical solution, the well washing channel is located below the horizontal well and is connected to the brine production well and the horizontal well through the inclination section, which further improves the well washing effect and enables the water flow to recoil the horizontal well from bottom to top.
[0010] Optionally, a first blocking device is provided at the connection between the horizontal well and the deflection section.
[0011] The above technical solution is used to limit the flow direction of water.
[0012] Optionally, a second blocking device is provided at the connection between the well-washing channel and the brine extraction well.
[0013] By adopting the above technical solution, the same principle applies as above.
[0014] Second, The present application provides another karez-type salt lake underground brine extraction system, wherein the well washing channel is arranged on the other side of the brine extraction well along the length direction of the horizontal well; two inclined sections are arranged, one of which is connected to the end of the horizontal well, and the other is connected to the end of the well washing channel; the two inclined sections extend in directions away from each other.
[0015] Optionally, it also includes a cleaning rope and a spare rope; the cleaning rope passes through one of the inclined sections, the horizontal well, the brine production well, the well washing channel, the other inclined section and then reaches the outside; both ends of the cleaning rope are provided with driving devices to make the cleaning rope reciprocate; the cleaning rope is provided with a plurality of cleaning brushes; the spare rope is used to replace the cleaning rope and is placed in the horizontal well for a long time.
[0016] By adopting the above technical solution, the horizontal well is cleaned by the reciprocating movement of the cleaning rope in the horizontal well, thereby further improving the well washing effect.
[0017] Optionally, the vertical shaft is also provided on the well washing channel.
[0018] By adopting the above technical solution, the well-washing channel can also serve as a horizontal well.
[0019] Optionally, a residue lifting device is provided in the brine mining well.
[0020] The third aspect The present application provides a cleaning method for a karez-type salt lake underground brine mining system, comprising the following steps: Step 1: excavate one of the inclined sections, and dig through the horizontal well to the brine production well, and continue to excavate the well washing channel along the length extension line of the horizontal well, then turn and excavate another inclined section upward; at the same time, arrange the spare rope therein during the drilling process; Step 2: replace the spare rope with the cleaning rope and connect it to the driving device; Step 3: the driving device drives the cleaning rope to reciprocate in the horizontal well; Step 4: extract the residue from the brine production well.
[0021] Optionally, in step three, high-pressure water is flushed into the horizontal well.
[0022] In summary, the present application includes at least one of the following beneficial effects: 1. High-pressure brine is flushed into the horizontal well through the deflection section to flush the residue from the horizontal well into the well-washing channel, thereby dredging the efficient horizontal well; 2. The horizontal well is cleaned by the reciprocating movement of the cleaning rope in the horizontal well, further improving the well cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is a structural diagram of Embodiment 2; Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at point A; Figure 3 is a schematic diagram of the structure of Embodiment 3; Figure 4 is a schematic structural diagram of Embodiment 4; Figure 5 It is a structural schematic diagram of the cleaning rope and the driving device in the third or fourth embodiment.
[0024] Explanation of the reference numerals in the accompanying drawings: 1. brine mining well; 2. horizontal well; 3. vertical shaft; 4. well washing channel; 5. inclined section; 51. inclined section A; 52. inclined section B; 6. lifting device; 71. first blocking device; 72. second blocking device; 8. cleaning rope; 81. cleaning brush; 82. annular structure; 9. driving device; 91. winding assembly; 92. steel rope; 93. locking hook. DETAILED DESCRIPTION
[0025] The following is combined with Figure 1 To Attachment Figure 5 This application is described in further detail.
[0026] Embodiment 1: The prior art includes brine wells and horizontal wells that are interconnected, and several vertical wells that are connected to the horizontal wells. A horizontal well is set in the lower brine layer under the salt lake, and the end of the horizontal well is connected to the vertically opened brine well. The vertical well extending vertically downward is connected to the horizontal well. The vertical well can connect the vertically pressurized brine layers, change the flow mode of brine in each pressurized brine layer through the formation to the brine well, so that the brine is collected from top to bottom into the horizontal well through the vertical well, and the horizontal well forms a superior water guide corridor. Several vertical wells are arranged in sequence along the axial direction of the horizontal well in the direction gradually away from the brine well, and several vertical wells are arranged in parallel and at equal intervals to drain and exploit the brine in the area where no brine mining project is arranged. The brine well generally uses a pump body to transport brine to the outside, and transports the collected brine to the brine transport channel.
[0027] Due to the above-mentioned related technologies, during the brine collection process, residues or salts (hereinafter referred to as residues) will fall from the vertical wells. As the use time increases, the residues are enriched at the bottom of the horizontal wells, blocking the horizontal wells, affecting the brine extraction efficiency and reducing the service life of the brine extraction system.
[0028] Therefore, in order to increase the efficiency of brine extraction and extend the service life of the brine extraction system, the horizontal well 2 needs to be periodically maintained and dredged. This embodiment discloses a method for dredging the horizontal well 2. A karez-type salt lake underground brine extraction system, which includes a well washing channel 4 and a deflection section 5. One end of the well washing channel 4 is connected to the horizontal well 2, and the other end is connected to the brine extraction well 1. The deflection section 5 extends obliquely from the ground in a direction gradually approaching the brine extraction well 1, and connects the horizontal well 2. The well washing channel 4 is inclined downward, and the lowest end is connected to the brine extraction well 1. The deflection section 5 is an arc structure rather than a straight line. A wall protection pipe is arranged in the deflection section 5. A combined steel pipe can be inserted into the horizontal well 2 in the deflection section 5, and the horizontal well 2 is flushed from the initial end. A residue lifting device 6 is arranged in the brine extraction well 1. The lifting device 6 can be selected in the form of a salvage net plus a hoist, or a water pump or an air compressor. In this example, an air compressor is used as an example.
[0029] The implementation principle of this embodiment is: High-pressure brine is flushed into the horizontal well 2 through the deflection section 5, and the residue is flushed from the horizontal well 2 into the well washing channel 4. Note that at this time, the deflection section 5 is not connected to the well washing channel 4. The residue is flushed into the well washing channel 4, and forms a suspension with the liquid and flows into the brine production well 1. Finally, the residue is extracted through the lifting device 6 in the brine production well 1. In this way, an efficient flushing of the horizontal well 2 is provided, thereby dredging the horizontal well 2.
[0030] Embodiment 2: Please refer to the attached Figure 1 and attached Figure 2, since the cleaning method in the first embodiment only relies on high-pressure brine to flush the residue, this embodiment provides a more efficient cleaning solution. In this embodiment, only one inclined section 5 is provided. The well washing channel 4 is arranged below the horizontal well 2. One end of the well washing channel 4 is connected to the brine well 1, and the other end extends to the inclined section 5 along the length direction of the horizontal well 2. The inclined section 5 extends downward and is connected to the well washing channel 4, so that the well washing channel 4 is connected to the horizontal well 2 at the inclined section 5. Several vertical shafts 3 penetrate the horizontal well 2 and connect to the well washing channel 4. A first blocking device 71 is provided at the connection between the horizontal well 2 and the inclined section 5. The first blocking device 71 uses a pipe plug with rubber bag, which belongs to the prior art and will not be repeated here. Furthermore, a second blocking device 72 can be provided at the connection between the well washing channel 4 and the brine well 1, and a pipe plug capsule is also used.
[0031] The implementation principle of this embodiment is: The first blocking device 71 is used to block the connection between the horizontal well 2 and the deflection section 5, and the second blocking device 72 is used to block the well-washing channel 4 and the brine production well 1. A water flow loop is formed in the brine production system so that the water flows through the deflection section 5, the well-washing channel 4, the vertical shaft 3, and the horizontal well 2 in sequence. High-pressure brine is flushed into the well-washing channel 4 from the deflection section 5, and the water flows into the horizontal well 2 from bottom to top to flush the residue. The second blocking device 72 is contracted to discharge the excess water flow from the well-washing channel 4 into the brine production well 1. Continue to flush the high-pressure brine into the horizontal well 2, and repeat the operation until the end of the horizontal well 2 is blocked and unblocked, so that the water flows from the horizontal well 2 to the brine production well 1.
[0032] Embodiment three: Please refer to the attached Figure 3 and attached Figure 5 , the difference between this embodiment and the second embodiment is that two deflection sections 5 are provided in this embodiment. Two deflection sections 5 are symmetrically provided with the brine well 1 as the central axis. The well washing channel 4 is provided along the extension line of the length direction of the horizontal well 2, one end of the well washing channel 4 is connected to the deflection section 5, and the other end is connected to the brine well 1. For the convenience of distinction, the deflection section 5 connected to the horizontal well 2 is called the deflection section A51, and the deflection section 5 connected to the well washing channel 4 is called the deflection section B52. The two deflection sections 5 extend in directions away from each other, so that the deflection section A51, the horizontal well 2, the brine well 1, the well washing channel 4, and the deflection section B52 are all connected. This embodiment also includes a cleaning cable 8. The cleaning cable 8 penetrates the deflection section A51 from the surface, and passes through the horizontal well 2, the brine well 1, the well washing channel 4, and the deflection section B52 in turn, and then reaches the outside world. Both ends of the cleaning cable 8 are provided with a driving device 9 to make the cleaning cable 8 reciprocate.
[0033] Furthermore, the driving device 9 is an electric winch, and both ends of the cleaning rope 8 are wound on the corresponding driving device 9. The cleaning rope 8 is moved by the same-direction rotation of the driving device 9. At least one cleaning brush 81 is arranged at intervals on the cleaning rope 8, and the cleaning brush 81 can use a structure such as a brush or a steel ball. The driving device 9 includes a winding component 91 and a steel rope 92. The end of the steel rope 92 is provided with a locking hook 93. This structure belongs to the prior art and will not be repeated here. The end of the cleaning rope 8 is provided with a ring structure 82, and the locking hook 93 is connected to the end of the cleaning rope 8 through the ring structure 82.
[0034] Furthermore, the present embodiment also includes a spare rope for replacing the cleaning rope 8 and being placed in the horizontal well 2 for a long time. The spare rope is a steel rope with a corrosion-resistant coating. Both ends of the spare rope also have a ring structure 82.
[0035] Furthermore, in this embodiment, fixed piles are arranged at the openings of the two deflection sections 5, and the fixed piles are used for daily fixing of the spare ropes. The fixed piles can be selected from wooden piles, concrete piles or steel structure piles, which are not specifically limited here.
[0036] Furthermore, when there is no need for cleaning, that is, the initial position of the cleaning rope 81 is located in the deflection section to prevent the brine extraction passage from being blocked.
[0037] Furthermore, in other embodiments, a well-washing channel 4 (at the dotted line below the horizontal well 2 in the figure, not marked) parallel to the horizontal well 2 may be provided to increase the well-washing efficiency.
[0038] The implementation principle of this embodiment is: The driving device 9 repeatedly rotates clockwise or counterclockwise to drive the cleaning rope 8 to reciprocate in the horizontal well 2, thereby cleaning the horizontal well 2 and further improving the well washing effect. When cleaning is not required, a spare rope can be placed in the horizontal well 2 to ensure the normal operation of the brine extraction process.
[0039] Embodiment 4: Please refer to the attached Figure 4 and attached Figure 5 In this embodiment, on the basis of the third embodiment, vertical wells 3 are opened at intervals on the well-washing channel 4, so that the well-washing channel 4 plays the same role as the horizontal well 2, thereby increasing the brine extraction efficiency.
[0040] Embodiment five: Please refer to the attached Figure 3 To Attachment Figure 5 , provides a cleaning method for a karez-type salt lake underground brine mining system, which is applied to the karez-type salt lake underground brine mining system described in Example 3 or Example 4. It includes the following steps: Step 1: Connect one end of the spare rope to the drilling equipment, dig at the preset deflection section B52 to the length extension direction of the horizontal well 2, change the direction of the drilling equipment, and drill into the well washing channel 4, while arranging the spare rope in the deflection section B52 and the well washing channel 4.
[0041] Step 2: Use drilling equipment to dig the inclined section A51 at the position of horizontal well 2, connect another spare rope to the drilling equipment, and the drilling equipment passes through the horizontal well 2 to the brine production well 1.
[0042] Step three, docking two sections of spare ropes in the brine mining well 1, and connecting the driving devices 9 at both ends.
[0043] Step 4, cleaning preparation stage, unlock the connection between one end of the standby rope and the driving device 9, connect the standby rope at that end to the cleaning rope 8, and connect the cleaning rope 8 to the driving device 9; start the driving device 9 at the other end to reel in the standby rope, thereby pulling the cleaning rope 8 into the inclined section 5 and the horizontal section until the standby rope is pulled out of the inclined section 5, remove the standby rope, and connect the cleaning rope 8 to the driving device 9 at the other end.
[0044] Step 5, cleaning stage, controlling the two sets of driving devices 9 to rotate repeatedly in the same direction, thereby pulling the cleaning rope 8 to reciprocate in the horizontal well 2 to clean the horizontal well 2.
[0045] Step six, injecting high-pressure brine into the deflection section 5 to flush the horizontal well 2.
[0046] Step seven, lifting the residual mixed liquid in the brine well 1.
[0047] Step eight, reverse the operation of step four and replace the cleaning rope 8 with the spare rope.
[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A karez-type underground salt lake brine extraction system, comprising a brine extraction well (1) and a horizontal well (2) connected to each other, and a plurality of vertical wells (3) connected to the horizontal well (2), characterized in that: It also includes a well-washing channel (4) and at least one inclined section (5); one end of the well-washing channel (4) is connected to the horizontal well (2), and the other end is connected to the brine production well (1); the inclined section (5) extends obliquely from the ground in a direction gradually approaching the brine production well (1), and is connected to the horizontal well (2).
2. The karez-type salt lake underground brine mining system according to claim 1, characterized in that: The well-washing channel (4) is arranged below the horizontal well (2); one end of the well-washing channel (4) is connected to the brine extraction well (1), and the other end extends along the length direction of the horizontal well (2); the well-washing channel (4) is connected to the horizontal well (2) at the same inclination section (5); a plurality of the vertical shafts (3) penetrate the horizontal well (2) and are connected to the well-washing channel (4).
3. The karez-type salt lake underground brine mining system according to claim 2, characterized in that: A first blocking device (71) is provided at the connection between the horizontal well (2) and the deflection section (5).
4. The karez-type underground salt lake brine extraction system according to claim 3, characterized in that: A second blocking device (72) is provided at the connection between the well-washing channel (4) and the brine extraction well (1).
5. The karez-type underground salt lake brine extraction system according to claim 1, characterized in that: The well-washing channel (4) is arranged on the other side of the brine mining well (1) along the length direction of the horizontal well (2); two inclined sections (5) are provided, one of which is connected to the end of the horizontal well (2), and the other of which is connected to the end of the well-washing channel (4); the two inclined sections (5) extend in directions away from each other.
6. The karez-type underground salt lake brine extraction system according to claim 5, characterized in that: It also includes a cleaning rope (8) and a spare rope; the cleaning rope (8) passes through one of the deflection sections (5), the horizontal well (2), the brine well (1), the well washing channel (4), the other deflection section (5) and then reaches the outside; driving devices (9) are provided at both ends of the cleaning rope (8) to enable the cleaning rope (8) to reciprocate; The cleaning rope (8) is provided with at least one cleaning brush (81); the spare rope is used to replace the cleaning rope (8) and is placed in the horizontal well (2) for a long time.
7. The karez-type underground salt lake brine extraction system according to claim 6, characterized in that: The vertical shaft (3) is also provided on the well-washing channel (4).
8. The karez-type underground salt lake brine mining system according to any one of claims 2 to 7, characterized in that: The brine mining well (1) is provided with a residue lifting device (6).
9. A method for cleaning a karez-type underground salt lake brine mining system as claimed in claim 6 or 7, characterized in that: The steps include: Step 1, excavating two sections of the deflection section, one of which is connected to the horizontal well (2), and the other is on the length extension line of the horizontal well (2), and then turning to excavate the cleaning well; at the same time, the spare rope is arranged therein during the drilling process; excavating one of the deflection sections (5), and excavating through the horizontal well (2) to the brine extraction well (1), and continuing to excavate the well washing channel (4) along the length extension line of the horizontal well (2), and then turning to excavate the other deflection section (5) upwards; at the same time, the spare rope is arranged therein during the drilling process; Step 2: replacing the standby rope with the cleaning rope (8) and connecting it to the driving device (9); Step 3: The driving device (9) drives the cleaning cable (8) to reciprocate in the horizontal well (2); Step 4: extracting residue from the brine mining well (1).
10. The cleaning method of the underground brine mining system of the karez-type salt lake according to claim 9, characterized in that: In step three, water is flushed into the horizontal well (2).