A lifting device for the leaching solution of in-situ leaching uranium in horizontal wells with an integrated well washing function

Abstract

This application relates to the technical field of underground fluid lifting in in-situ leaching of uranium, and particularly to a lifting device for leaching solution in horizontal well in-situ leaching of uranium integrated with well washing function, which includes a collection device for transferring the leaching solution in the horizontal section to a position near the horizontal section in the vertical section; a lifting device for lifting the liquid near the horizontal section in the vertical section to the wellhead; and a power device for providing power to the collection device and the lifting device. This application has the effect of uniformly collecting the leaching solution in the horizontal section of the horizontal well.

Description

Technical Field

[0001] This application relates to the technical field of underground fluid lifting in in-situ leaching of uranium, and particularly to a leaching solution lifting device for horizontal well in-situ leaching of uranium integrated with a well washing function. Background Art

[0002] Due to its characteristics of a large well deviation angle and maintaining a certain length in the target layer, horizontal wells are widely used in fields such as in-situ leaching of uranium. However, due to its special well structure, the lifting of the solution in the horizontal well poses certain difficulties in daily production. The traditional extraction method mainly relies on the electric pump in the vertical section. However, due to the structural differences between the vertical section and the horizontal section, and the excessive length of the horizontal section (usually about 200m to ensure the collection efficiency), the extraction of the solution in the horizontal section is uneven. The liquid near the vertical section is more easily extracted, while the liquid far from the vertical section is difficult to be effectively extracted. If uniform extraction is desired, two submersible pumps need to be lowered into the same shaft for simultaneous extraction. However, due to the limited underground space, the two-pump solution is extremely difficult to implement, which seriously affects the collection efficiency and the balanced extraction of the underground leaching solution. Summary of the Invention

[0003] In order to uniformly collect the leaching solution in the horizontal section of the horizontal well, this application provides a leaching solution lifting device for horizontal well in-situ leaching of uranium integrated with a well washing function.

[0004] The leaching solution lifting device for horizontal well in-situ leaching of uranium integrated with a well washing function provided by this application adopts the following technical solutions:

[0005] A leaching solution lifting device for horizontal well in-situ leaching of uranium integrated with a well washing function includes a collection device for transferring the leaching solution in the horizontal section to a position near the horizontal section in the vertical section; a lifting device for lifting the liquid near the horizontal section in the vertical section to the wellhead; and a power device for providing power to the collection device and the lifting device.

[0006] By adopting the above technical solutions, the collection device can transfer the leaching solution in the horizontal section to a position near the horizontal section in the vertical section, and then the lifting device can effectively lift the leaching solution evenly to the ground to form a balanced concentration field.

[0007] Optionally, the collection device includes a collection water pump, which has a collection pump power interface provided at one end of the pump body, a collection water inlet provided at the other end of the pump body, and a collection water outlet provided on one side of the pump body. The collection water pump is coaxially arranged with the vertical section in the vertical direction, and the collection water inlet is arranged downward in the vertical direction. A collection pipe is provided at the collection water inlet, one end of the collection pipe is connected to the collection water inlet, and the other end of the collection pipe is arranged in the horizontal section.

[0008] By adopting the above technical solution, the leachate in the horizontal section can be effectively transferred to the vertical section, and the arrangement where the collection water pump is coaxial with the vertical section can ensure the continuity and stability of extraction.

[0009] Optionally, a plurality of collection holes are provided on the pipe wall of the collection pipe, and all the collection holes are located in the horizontal section.

[0010] By adopting the above technical solution, the collection holes on the collection pipe can extract the leachate in the horizontal section more evenly, thereby improving the balance of leachate extraction.

[0011] Optionally, the aperture size of the collection hole is proportional to the distance between the collection hole and the shaft.

[0012] By adopting the above technical solution, larger apertures are set for the collection holes far from the shaft, which can further improve the extraction efficiency of the leachate at the far end, thereby achieving a more uniform extraction effect.

[0013] Optionally, a plug is provided at one end of the collection pipe away from the collection water pump.

[0014] By adopting the above technical solution, the plug can make all the leachate enter the collection pipe from the collection holes, increasing the collection effect of the collection holes.

[0015] Optionally, the part of the collection pipe located in the horizontal section is coaxially arranged with the horizontal section.

[0016] By adopting the above technical solution, it can ensure that the circumferential pressure in the horizontal section of the collection pipe is the same, thereby improving the collection efficiency and uniformity of the leachate.

[0017] Optionally, the lifting device includes a lifting water pump. The lifting water pump has a lifting pump power interface provided at one end of the pump body, a lifting water outlet provided at the other end of the pump body, and a lifting water inlet provided on one side of the pump body. The lifting water pump is coaxially arranged with the vertical section in the vertical direction, and the lifting water outlet is arranged upward in the vertical direction. A lifting pipe is provided at the lifting water outlet along the vertical direction. One end of the lifting pipe is connected to the lifting water outlet, and the other end of the lifting pipe is arranged outside the well.

[0018] By adopting the above technical solution, the lifting water pump can realize the extraction of well water and pump the leachate out of the well for subsequent treatment.

[0019] Optionally, the power device includes a double-output shaft underwater motor. The two output shafts of the double-output shaft underwater motor are respectively drivingly connected to the collection pump power interface and the lifting pump power interface through couplings.

[0020] By adopting the above technical solution, the double-output-shaft underwater motor can provide power for both the collection device and the lifting device simultaneously, simplifying the complexity of the equipment and reducing energy consumption.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. By designing the collection device and the lifting device, and using the power device to provide power for both the collection device and the lifting device simultaneously, the leaching solution can be extracted evenly and efficiently from the horizontal well, solving the problem of unevenness in traditional extraction methods, and thus improving the production efficiency of in-situ leaching uranium mining;

[0023] 2. The collection holes of the collection pipe located at the horizontal section, as well as the adjustment strategy for the aperture of the collection holes, ensure that the leaching solution far from the vertical section can also be effectively extracted, enhancing the evenness of leaching solution extraction. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of a leaching solution lifting device for in-situ leaching uranium mining in a horizontal well integrating the well washing function provided by an embodiment of this application.

[0025] Description of the reference numerals: 1 - vertical section; 2 - horizontal section; 3 - protection pipe; 301 - solid section; 302 - filtering section; 4 - collection device; 401 - collection water pump; 4011 - collection pump power interface; 4012 - collection water outlet; 4013 - collection water inlet; 402 - collection pipe; 403 - plug; 404 - collection hole; 5 - lifting device; 501 - lifting water pump; 5011 - lifting pump power interface; 5012 - lifting water outlet; 5013 - lifting water inlet; 502 - lifting pipe; 6 - double-output-shaft underwater motor; 7 - coupling. Detailed Embodiment

[0026] The following will further elaborate on this application in conjunction with the attached Figure 1 for a more detailed description.

[0027] In-situ leaching uranium mining is a method of uranium ore mining that integrates collection and smelting. Through drilling engineering, with the aid of chemical reagents, uranium in the ore is dissolved out to form leaching solution under natural burial conditions, and the leaching solution is lifted to the surface by pumps for resource recovery without causing displacement of the ore. To reduce land use costs, horizontal wells can be used for in-situ leaching drilling. The horizontal well includes a horizontal section 2 and vertical sections 1 at both ends of the horizontal section 2. A protection pipe 3 is provided on the well wall of the horizontal well. The outer wall of the part of the protection pipe 3 located in the horizontal section 2 is densely covered with holes. The part of the protection pipe 3 with holes is the filtering section 302, and the rest is the solid section 301. By putting chemical reagents into the well, the well water containing chemical reagents comes into contact with the well wall through the filtering section 302 and reacts to dissolve uranium to form leaching solution.

[0028] An embodiment of the present application discloses a lifting device 5 for leaching solution in horizontal well in-situ leaching of uranium integrated with well flushing function.

[0029] As Figure 1 shown, the lifting device 5 for leaching solution in horizontal well in-situ leaching of uranium integrated with well flushing function includes a collection device 4, which is used to transfer the leaching solution in the horizontal section 2 to the position of the vertical section 1 close to the horizontal section 2; a lifting device 5, which is used to lift the liquid in the vertical section 1 close to the horizontal section 2 to the wellhead; and a power device, which is used to provide power to the collection device 4 and the lifting device 5. Since a horizontal well usually has two vertical sections 1, in actual use, usually two lifting devices 5 for leaching solution in horizontal well in-situ leaching of uranium integrated with well flushing function are arranged in the two vertical sections 1 for cooperative use.

[0030] As Figure 1 shown, specifically, the collection device 4 includes a collection water pump 401, which has a collection pump power interface 4011 arranged at one end of the pump body, a collection water inlet 4013 arranged at the other end of the pump body, and a collection water outlet 4012 arranged on one side of the pump body. The collection water pump 401 is coaxially arranged with the vertical section 1 in the vertical direction, and the collection water inlet 4013 is arranged downward in the vertical direction. A collection pipe 402 is arranged at the collection water inlet 4013. One end of the collection pipe 402 is connected to the collection water inlet 4013, and the other end of the collection pipe 402 is arranged in the horizontal section 2.

[0031] The collection water pump 401 and the collection pipe 402 can pump the leaching solution far from the vertical section 1 to the vertical section 1, that is, at the collection water outlet 4012. As the collection water pump 401 continuously works, the leaching solution in the horizontal section 2 close to the vertical section 1 gradually replenishes the part of the horizontal section 2 far from the vertical section 1, so as to realize the transfer of the leaching solution in the horizontal section 2 to the position of the vertical section 1 close to the horizontal section 2.

[0032] As Figure 1 shown, in order to evenly extract the leaching solution in the horizontal section 2, a plurality of collection holes 404 are arranged on the pipe wall of the collection pipe 402, and all the collection holes 404 are located in the horizontal section 2. A plug 403 is arranged at the end of the collection pipe 402 far from the collection water pump 401. By arranging the collection holes 404, the leaching solution at various positions in the horizontal section 2 can be collected simultaneously, thereby improving the balance of leaching solution extraction.

[0033] As Figure 1As shown, the aperture size of the collection hole 404 is proportional to the distance between the collection hole 404 and the shaft. When the collection water pump 401 is started, the liquid in the collection pipe 402 will form a certain negative pressure at the collection hole 404. The negative pressure at the collection hole 404 with a larger aperture is less than that at the collection hole 404 with a smaller aperture. During the process of the liquid in the collection pipe 402 flowing from the distal end to the collection pump, the pressure provided by the collection pump continuously decreases from the collection pump towards the distal end away from the collection pump. By changing the aperture of the collection hole 404, the water inflow of the distal water intake hole is increased, thereby balancing the pressure change brought by the path, and then realizing the balanced extraction of the leaching solution in the horizontal section 2.

[0034] In addition, the part of the collection pipe 402 located in the horizontal section 2 is coaxially arranged with the horizontal section 2. The coaxially arranged collection pipe 402 can ensure that the circumferential pressure of the collection pipe 402 in the horizontal section 2 is the same, thereby improving the collection efficiency and uniformity of the leaching solution.

[0035] During the actual use process, due to the special structure of the horizontal well, a certain amount of impurities such as sand and gravel will remain in the horizontal section 2. After long-term accumulation, the water permeability of the filtration section 302 will decrease. However, the horizontal well in-situ leaching uranium leaching solution lifting device 5 with the integrated well washing function provided by the present application, relying on the strong negative pressure at the collection hole 404, can quickly suck impurities such as sand and gravel into the collection pipe 402, and transfer them to the vertical section 1 part together with the leaching solution, and lift them to the ground by the lifting device 5, thereby effectively reducing the probability of permeability blockage of the filtration section 302 and achieving the purpose of well washing.

[0036] As Figure 1 shown, specifically, the lifting device 5 includes a lifting water pump 501. The lifting water pump 501 has a lifting pump power interface 5011 provided at one end of the pump body, a lifting water outlet 5012 provided at the other end of the pump body, and a lifting water inlet 5013 provided on one side of the pump body. The lifting water pump 501 is coaxially arranged with the vertical section 1 in the vertical direction, and the lifting water outlet 5012 is arranged upward in the vertical direction. A lifting pipe 502 is provided at the lifting water outlet 5012 and arranged in the vertical direction. One end of the lifting pipe 502 is connected to the lifting water outlet 5012, and the other end of the lifting pipe 502 is arranged outside the well. The lifting water pump 501 can realize the extraction of the leaching solution mixed with sediment, and pump the leaching solution carrying sediment out of the well for subsequent treatment.

[0037] As Figure 1 shown, specifically, the power device includes a double-output shaft underwater motor 6. The two output shafts of the double-output shaft underwater motor 6 are respectively drivingly connected to the collection pump power interface 4011 and the lifting pump power interface 5011 through couplings 7. The double-output shaft underwater motor 6 can provide power for the collection device 4 and the lifting device 5 at the same time, simplifying the complexity of the equipment and reducing the energy consumption.

[0038] The implementation principle of the leaching solution lifting device 5 for horizontal well in-situ leaching of uranium integrated with well flushing function in the embodiments of the present application is as follows:

[0039] Start the power device, and the double-output shaft underwater motor 6 can provide power for both the collection device 4 and the lifting device 5 at the same time.

[0040] The collection water pump 401 starts to work under the action of the double-output shaft underwater motor 6. The collection holes 404 of the collection pipe 402 suck in the sediment and leaching solution in the horizontal section 2, and after being pressurized by the collection water pump 401, they come to the collection water pump 401 via the collection pipe 402 and are discharged from the collection blow water outlet to the vertical section 1.

[0041] The lifting water pump 501 starts to work under the action of the double-output shaft underwater motor 6. The lifting water inlet 5013 sucks in the leaching solution containing sediment, and after being pressurized by the lifting water pump 501, it is lifted to the ground via the lifting pipe 502 and pumped out of the well for subsequent treatment.

[0042] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A lifting device for in-situ leaching uranium leachate with integrated well washing function, which is used to collect in-situ leaching uranium leachate at a horizontal well. The horizontal well includes a horizontal section (2) and vertical sections (1) located at both ends of the horizontal section (2). A protection pipe (3) is provided on the well wall of the horizontal well. The outer wall of the part of the protection pipe (3) located in the horizontal section (2) is densely covered with holes. The part of the protection pipe (3) with holes is the filtering section (302), and the rest is the solid section (301). It is characterized in that, Comprising: A collection device (4) for transferring the leachate of the horizontal section (2) to a position of the vertical section (1) close to the horizontal section (2); A lifting device (5) for lifting the liquid in the vertical section (1) close to the horizontal section (2) to the wellhead; A power device for supplying power to the collection device (4) and the lifting device (5); The collection device (4) includes a collection water pump (401). The collection water pump (401) has a collection pump power interface (4011) provided at one end of the pump body, a collection water inlet (4013) provided at the other end of the pump body, and a collection water outlet (4012) provided on one side of the pump body. The collection water pump (401) is coaxially arranged with the vertical section (1) in the vertical direction, and the collection water inlet (4013) is arranged downward in the vertical direction. A collection pipe (402) is provided at the collection water inlet (4013). One end of the collection pipe (402) is connected to the collection water inlet (4013), and the other end of the collection pipe (402) is arranged in the horizontal section (2); The lifting device (5) includes a lifting water pump (501). The lifting water pump (501) has a lifting pump power interface (5011) provided at one end of the pump body, a lifting water outlet (5012) provided at the other end of the pump body, and a lifting water inlet (5013) provided on one side of the pump body. The lifting water pump (501) is coaxially arranged with the vertical section (1) in the vertical direction, and the lifting water outlet (5012) is arranged upward in the vertical direction. A lifting pipe (502) arranged in the vertical direction is provided at the lifting water outlet (5012). One end of the lifting pipe (502) is connected to the lifting water outlet (5012), and the other end of the lifting pipe (502) is arranged outside the well; The power device includes a double-output shaft underwater motor (6). The two output shafts of the double-output shaft underwater motor (6) are respectively drivingly connected to the collection pump power interface (4011) and the lifting pump power interface (5011) through couplings (7).

2. The uranium in-situ leaching solution lifting device with integrated well flushing function according to claim 1, characterized in that A plurality of collection holes (404) are provided on the pipe wall of the collection pipe (402), and the collection holes (404) are all located in the horizontal section (2).

3. The lifting device for the leaching solution of in-situ leaching uranium in horizontal wells with integrated well washing function according to claim 2, characterized in that The aperture size of the collection holes (404) is proportional to the distance between the collection holes (404) and the vertical section.

4. The lifting device for the leaching solution of in-situ leaching uranium in horizontal wells with integrated well flushing function according to claim 2, wherein, A plug (403) is provided at the end of the collection pipe (402) away from the collection water pump (401).

5. The lifting device for leaching solution of horizontal well in-situ leaching of uranium integrated with well washing function according to claim 2, characterized in that, The part of the collection pipe (402) located in the horizontal section (2) is coaxially arranged with the horizontal section (2).

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