In-situ leaching uranium mining well drilling double-layer mine packer

Abstract

The utility model discloses an in-situ leaching uranium mining well drilling double-layer mine packer, which relates to the technical field of packers and comprises a packing upper pipe fitting, a packing lower pipe fitting and a lower layer liquid injection pipe, the lower end of the packing upper pipe fitting is fixedly connected with the upper end of the packing lower pipe fitting, and a middle partition plate is arranged between the lower end of the packing upper pipe fitting and the upper end of the packing lower pipe fitting. A buckle lifting structure is arranged at the upper end of the upper packing pipe fitting, the lower end of the lower packing pipe fitting is connected with a one-way valve, the upper end of the lower-layer liquid injection pipe is located at a wellhead of the liquid injection well, the lower-layer liquid injection pipe penetrates through the side wall of the upper packing pipe fitting and the middle partition plate, and the lower end of the lower-layer liquid injection pipe is located in the lower packing pipe fitting. A plurality of liquid leakage through holes are formed in the side wall of the lower packing pipe fitting, a packing sleeve is arranged on the side wall of the lower packing pipe fitting, and all the liquid leakage through holes can be blocked by the packing sleeve. According to the utility model, double-layer simultaneous liquid injection can be realized, so that the liquid injection efficiency can be effectively improved, and the cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of packers, in particular to a double-layer ore packer for in-situ leaching uranium drilling. Background Art

[0002] As shown in the existing packer "a hydraulic fracturing open-hole packer for underground coal mines" disclosed in the patent number CN201687429U, it includes a central pipe. Upper and lower connectors are respectively arranged at the top and bottom of the central pipe. An upper lock cap, a sealing connector, a shoulder protector and a rubber cylinder are sequentially sleeved on the outer circle of the central pipe between the upper and lower connectors from top to bottom. The lock cap, the sealing connector and the shoulder protector are symmetrically arranged about the rubber cylinder in sequence on the lower side of the rubber cylinder. The diameter of the middle part of the rubber cylinder is larger than the diameters of the upper and lower sides of the rubber cylinder. Upper and lower side shoulder protectors are respectively located on the outer circles of the upper and lower sides of the rubber cylinder. And the lower end of the upper side shoulder protector abuts against the upper end of the middle part of the rubber cylinder, and the upper end of the lower side shoulder protector abuts against the lower end of the middle part of the rubber cylinder. The device provides a hydraulic fracturing open-hole packer for underground coal mines aiming at the deficiencies of existing equipment, and has the characteristics of high expansion rate, tight hole sealing, high resistance to high pressure, low starting pressure, no limit position and reusable for coal holes, rock holes for hydraulic fracturing, hydraulic extrusion and other drill holes.

[0003] In-situ leaching of uranium is a process of arranging process drill holes for in-situ leachable sandstone-type uranium ore according to a certain grid, injecting in-situ leaching liquid from the injection holes, making the in-situ leaching liquid fully react with uranium, extracting it to the surface through the pumping holes, and extracting uranium in the surface factory.

[0004] However, the distribution gap of double-layer ore bodies in the existing mining areas is large. If the conventional injection and pumping methods are adopted, that is, the upper and lower layers are separated through the existing separator and then injected separately; or two injection wells are drilled, one for injecting liquid into the upper ore body and the other for injecting liquid into the lower ore body. No matter which method is used, double-layer simultaneous injection and double-layer separate control cannot be carried out. The existing single-layer mining method not only has low working efficiency, but also has high use cost. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a double-layer ore packer for in-situ leaching uranium drilling to solve the above problems existing in the prior art, which can carry out simultaneous injection of double-layer ore bodies, thereby effectively improving the injection efficiency and having low use cost.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model discloses a double-layer ore packer for in-situ leaching uranium drilling, which comprises an upper packer pipe fitting, a lower packer pipe fitting and a lower liquid injection pipe. The lower end of the upper packer pipe fitting is fixedly connected with the upper end of the lower packer pipe fitting. An intermediate partition plate is arranged between the lower end of the upper packer pipe fitting and the upper end of the lower packer pipe fitting. A buckle lifting structure is arranged at the upper end of the upper packer pipe fitting. A one-way valve is connected to the lower end of the lower packer pipe fitting. The upper end of the lower liquid injection pipe is located at the wellhead of the injection well. The lower liquid injection pipe penetrates through the side wall and the intermediate partition plate of the upper packer pipe fitting. The lower end of the lower liquid injection pipe is located inside the lower packer pipe fitting. A plurality of liquid leakage through holes are arranged on the side wall of the lower packer pipe fitting. A packing sleeve is arranged on the side wall of the lower packer pipe fitting. The packing sleeve can block all the liquid leakage through holes.

[0008] Preferably, a plurality of guide sleeves are sleeved on the outer wall of the upper packer pipe fitting.

[0009] Preferably, there are three guide sleeves in total, and the three guide sleeves are distributed at intervals.

[0010] Preferably, the guide sleeves and the packing sleeve are both made of expanded rubber.

[0011] Preferably, both the upper packer pipe fitting and the lower packer pipe fitting are iron pipe structures, and the outer diameters of the upper packer pipe fitting and the lower packer pipe fitting are both 89 mm.

[0012] Preferably, the buckle lifting structure is a conical pipe fitting structure, and a buckle lifting groove is arranged on the side wall of the buckle lifting structure.

[0013] Preferably, the outer diameter of the packing sleeve is 100 mm.

[0014] Preferably, the lower liquid injection pipe is made of PE material, and the outer diameter of the lower liquid injection pipe is 28 mm.

[0015] The utility model has obtained the following technical effects compared with the prior art:

[0016] By using the double-layer ore packer for in-situ leaching uranium drilling to block the ore body, the double-layer mining of the ore body is formed. It can realize the separate control of the running water volume of the upper ore body and the lower ore body, improve the mining efficiency, the mining data is accurate, the actual application effect is good, the mining concentration of the surrounding boreholes increases, the output increases, and the overall practical performance is improved. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a double-layer ore packer for in-situ leaching uranium drilling in an embodiment of the present invention;

[0019] Figure 2 It is a partial enlarged view of a buckle lifting structure in a double-layer ore packer for in-situ leaching uranium drilling in an embodiment of the present invention;

[0020] In the figure: 1 - upper pipe fitting of the packer; 2 - check valve; 3 - buckle lifting structure; 4 - guide sleeve; 5 - packer sleeve; 6 - lower liquid injection pipe. Detailed implementation manners

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0022] The purpose of the present invention is to provide a double-layer ore packer for in-situ leaching uranium drilling, to solve the problems existing in the above-mentioned prior art, which can perform liquid injection for double-layer ore bodies simultaneously, thereby effectively improving the liquid injection efficiency and having a low use cost.

[0023] To make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0024] Such as Figure 1 - Figure 2As shown in the figure, the utility model provides a double-layer ore packer for in-situ leaching uranium drilling, which includes an upper packer pipe fitting 1, a lower packer pipe fitting, and a lower layer liquid injection pipe 6. Among them, the lower end of the upper packer pipe fitting 1 is fixedly connected to the upper end of the lower packer pipe fitting. The connection between the upper packer pipe fitting 1 and the lower packer pipe fitting can be fixed by welding or can be an integral design. And there is an intermediate partition between the lower end of the upper packer pipe fitting 1 and the upper end of the lower packer pipe fitting, so that the upper packer pipe fitting 1 and the lower packer pipe fitting are not connected to each other. The upper end of the upper packer pipe fitting 1 is provided with a buckle lifting structure 3, and the buckle lifting structure 3 is used to connect the pipe string structure, and realizes the lifting or lowering of the double-layer ore packer for in-situ leaching uranium drilling through the connection relationship with the pipe string. The lower end of the lower packer pipe fitting is connected with a one-way valve 2, and the one-way valve 2 makes the liquid in the lower packer pipe fitting can only flow to the outside, and the outside liquid cannot flow into the lower packer pipe fitting. The upper end of the lower layer liquid injection pipe 6 is located at the wellhead of the injection well, and the middle part of the lower layer liquid injection pipe 6 will sequentially pass through the side wall and the intermediate partition of the upper packer pipe fitting 1, and the lower end of the lower layer liquid injection pipe 6 is located inside the lower packer pipe fitting, so that the lower layer liquid injection pipe 6 can inject liquid into the lower packer pipe fitting. There are several liquid leakage through holes on the side wall of the lower packer pipe fitting, and a packer sleeve 5 is provided on the side wall of the lower packer pipe fitting. The packer sleeve 5 can block all the liquid leakage through holes, and at the same time the packer sleeve 5 expands when encountering water, so that the packer sleeve 5 can abut against the well wall, thereby realizing the technical effect of separating the upper ore body and the lower ore body.

[0025] During actual use, first use the relevant settings at the wellhead to pass the pipe string to the double-layer ore packer for in-situ leaching uranium drilling. When the double-layer ore packer for in-situ leaching uranium drilling is lowered to the expected depth. Inject water into the upper liquid injection pipe and the lower layer liquid injection pipe 6 at the wellhead. Here it should be noted that the upper liquid injection pipe itself has no connection with the double-layer ore packer for in-situ leaching uranium drilling. The upper end of the upper liquid injection pipe is located at the wellhead, and the lower end of the upper liquid injection pipe is located above the upper packer pipe fitting 1 (not in contact with the upper packer pipe fitting 1). The water in the lower layer liquid injection pipe 6 is continuously transported into the lower packer pipe fitting. When the lower packer pipe fitting is filled with water, part of the water will leak out from the liquid leakage through holes and flow into the packer sleeve 5, and the packer sleeve 5 will gradually expand when encountering water. When the injection reaches a pressure of 1.6 MPa, the packer sleeve 5 expands to abut against the well wall, thereby playing a separating role. And at this time, the water in the lower packer pipe fitting will also flow through the one-way valve 2 into the lower ore body. At the same time, under the action of the packer sleeve 5, the water in the upper liquid injection pipe can only flow in the upper ore body, so as to inject liquid into the upper ore body. Finally, the technical purpose of injecting liquid into the double-layer ore bodies at the same time is achieved.

[0026] During this process, because the packer sleeve 5 plays a sealing role, the liquid between the upper ore body and the lower ore body is not connected to each other, and the water in the single ore body can better flow into each position in this layer of ore body, which also makes the injection volume increase by 1.9 m 3 / h. For the liquid extraction well, the liquid extraction volume slightly decreases, ultimately increasing the extraction concentration and improving the production. During this process, the double-layer ore body can work simultaneously and be controlled separately, thus effectively improving the extraction efficiency. Meanwhile, the extraction data is accurate and the actual application effect is good.

[0027] In this embodiment, several guide sleeves 4 are sleeved on the outer wall of the upper packer pipe fitting 1. The purpose of setting the guide sleeves 4 is that during the process of lowering the upper packer pipe fitting 1 and the lower packer pipe fitting, the guide sleeves 4 can contact the well wall, thereby playing a role of guiding and limiting the upper packer pipe fitting 1 and the lower packer pipe fitting, and preventing them from having large deviations.

[0028] In this embodiment, there are three guide sleeves 4 in total, and the three guide sleeves 4 are spaced apart. Of course, those skilled in the art can also adjust the specific quantity and installation position of the guide sleeves 4 according to actual needs.

[0029] In this embodiment, the materials of the guide sleeves 4 and the packer sleeves 5 are both existing expanded rubber. Therefore, when the guide sleeves 4 encounter water, they will also expand and contact the well wall, thus being able to play a role of positioning and packing.

[0030] In this embodiment, both the upper packer pipe fitting 1 and the lower packer pipe fitting are of iron pipe structure, and the outer diameters of the upper packer pipe fitting 1 and the lower packer pipe fitting are both 89 mm.

[0031] In other embodiments, the relevant dimensions of the upper packer pipe fitting 1 and the lower packer pipe fitting can be selected according to the actual situation, not limited to just this one.

[0032] In this embodiment, as Figure 2 shown, the buckle lifting structure 3 is a conical pipe fitting structure, and a "7"-shaped buckle lifting groove is provided on the side wall of the buckle lifting structure 3. The length of the buckle lifting groove is 1 m. The buckle lifting groove can be used in cooperation with the connecting pin on the pipe string. This cooperation is a prior art, so no more details will be described here.

[0033] In this embodiment, the outer diameter of the packer sleeve 5 includes but is not limited to 100 mm.

[0034] In this embodiment, the material of the lower liquid injection pipe 6 is PE material (i.e., PE plastic), and the outer diameter of the lower liquid injection pipe 6 is 28 mm. Of course, those skilled in the art can also adjust the relevant dimensions of each part according to the actual situation.

[0035] In the present utility model, specific examples are used to illustrate the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on the present utility model.

Claims

1. A double-layer ore packer for in-situ leaching uranium drilling, characterized in that: It includes an upper packer pipe fitting, a lower packer pipe fitting and a lower layer liquid injection pipe. The lower end of the upper packer pipe fitting is fixedly connected to the upper end of the lower packer pipe fitting. An intermediate partition plate is provided between the lower end of the upper packer pipe fitting and the upper end of the lower packer pipe fitting. A buckle lifting structure is provided at the upper end of the upper packer pipe fitting. A check valve is connected to the lower end of the lower packer pipe fitting. The upper end of the lower layer liquid injection pipe is located at the wellhead of the injection well. The lower layer liquid injection pipe passes through the side wall and the intermediate partition plate of the upper packer pipe fitting. The lower end of the lower layer liquid injection pipe is located inside the lower packer pipe fitting. A plurality of liquid leakage through holes are provided on the side wall of the lower packer pipe fitting. A packer sleeve is provided on the side wall of the lower packer pipe fitting. The packer sleeve can block all the liquid leakage through holes.

2. The double-layer ore packer for in-situ leaching uranium drilling according to claim 1, characterized in that: A plurality of guide sleeves are sleeved on the outer wall of the upper packer pipe fitting.

3. The double-layer ore packer for in-situ leaching uranium drilling according to claim 2, wherein: There are three guide sleeves in total, and the three guide sleeves are distributed at intervals.

4. The in-situ leaching uranium extraction well drilling double-layer ore packer according to claim 2, wherein: The materials of the guide sleeve and the packer sleeve are both expanded rubber.

5. The in-situ leaching uranium extraction well drilling double-layer ore packer according to claim 1, wherein: Both the upper packer pipe fitting and the lower packer pipe fitting are iron pipe structures, and the outer diameters of the upper packer pipe fitting and the lower packer pipe fitting are both 89 mm.

6. The double-layer ore packer for in-situ leaching uranium drilling according to claim 1, wherein: The buckle lifting structure is a conical pipe fitting structure, and a buckle lifting groove is provided on the side wall of the buckle lifting structure.

7. The in-situ leaching uranium extraction well drilling double-layer ore packer according to claim 1, characterized in that: The outer diameter of the packer sleeve is 100 mm.

8. The double-layer ore packer for in-situ leaching uranium drilling according to claim 1, characterized in that: The material of the lower layer liquid injection pipe is PE material, and the outer diameter of the lower layer liquid injection pipe is 28 mm.

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