Single-hole multi-layer single-pipe water pumping device and water pumping process

Abstract

The single-hole multi-layer single-pipe water pumping device comprises a pump chamber pipe and a multi-stage water pumping section connected to the lower portion of the pump chamber pipe, the multi-stage water pumping section is limited through a variable-diameter boss preset in a drill hole, the water pumping section comprises a water pumping pipe, and the water pumping pipe is connected to the lower portion of the pump chamber pipe. The diameter of the water pumping pipe is smaller than the diameter of the smallest hole section in the drill hole, a water passing hole is formed in the upper half section of the water pumping pipe, the bottom of the water pumping pipe is connected with the corresponding variable-diameter boss in a sealed mode, a partition assembly is installed at the tail end in the water pumping pipe, and the partition assembly is used for controlling connection and disconnection of the water pumping pipes of the two adjacent stages of water pumping sections. By adopting the single-hole multi-layer single-pipe water pumping device, the hole diameter of the drill hole and the pipe diameter of the water pumping pipe can be reduced, the construction difficulty is effectively reduced, and the construction cost is greatly reduced while the construction period is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of geological exploration, and in particular to a single-hole multi-layer single-tube water pumping device and a water pumping process. Background Art

[0002] The mining and utilization of coal has played a huge role in promoting my country's economic development. According to the latest forecast, coal resources will still occupy an important position in my country's energy supply in the future. As shallow coal resources are becoming increasingly depleted, the exploration of deep coal resources and the geological guarantee of production are becoming more urgent, especially in the field of deep hydrogeological research, where there are still many deficiencies that need to be supplemented. At present, there are problems such as large hole depth, large hole diameter, difficulty in taking into account the pumping of multiple aquifers with a single hole, and high construction costs for deep aquifer pumping. Summary of the invention

[0003] In view of the shortcomings in the prior art, the present invention provides a single-hole multi-layer single-tube pumping device and a pumping process. The single-hole multi-layer single-tube pumping device can reduce the diameter of the drill hole and the diameter of the pumping pipe, effectively reducing the construction difficulty, shortening the construction period and greatly reducing the construction cost.

[0004] A single-hole, multi-layer, single-tube water pumping device comprises a pump chamber tube and a multi-stage water pumping section connected to the bottom of the pump chamber tube, wherein the multi-stage water pumping section is limited by a variable diameter boss preset in a borehole, wherein the water pumping section comprises a water pumping pipe, wherein the diameter of the water pumping pipe is smaller than the diameter of the thinnest hole section in the borehole, wherein a water hole is provided in the upper half of the water pumping pipe, wherein the bottom of the water pumping pipe is sealedly connected to the corresponding variable diameter boss, and a partition assembly is installed at the inner end of the water pumping pipe, wherein the partition assembly is used to control the on-off of the water pumping pipes of two adjacent water pumping sections.

[0005] As a preferred embodiment of the above technical solution, the water pumping pipe includes a screen pipe section and a water stop sleeve, the water hole is arranged on the screen pipe section, the water stop sleeve is fixed to the bottom of the screen pipe section, the partition assembly is fixed in the water stop sleeve, and the outer ring of the water stop sleeve is wrapped with a temporary water stop.

[0006] As a preferred embodiment of the above technical solution, the partition assembly includes a threaded lower reverse-button base and an upper positive-button plug, the lower reverse-button base is fixedly connected to the water-stop sleeve, and the upper positive-button plug can be connected to the drill rod, and the connection of the pumping pipes of the upper and lower pumping sections can be achieved by rotating the drill rod and unscrewing the upper positive-button plug.

[0007] As a preferred embodiment of the above technical solution, the temporary waterstop is made of kelp and expanded rubber, the lower edge of the temporary waterstop rests on the variable diameter boss of the drilled hole, and the upper edge is limited by an anti-drop pad fixed on the waterstop casing.

[0008] As a preferred embodiment of the above technical solution, the screen pipe section of the first-stage pumping section is fixedly connected to the pump chamber pipe via a reducing portion, and the reducing portion is limited by a reducing boss on the drilled hole.

[0009] As a preferred embodiment of the above technical solution, a temporary water stop is wound on the outer conical surface of the diameter-changing portion.

[0010] A single-hole multi-layer single-tube water pumping process, using any of the single-hole multi-layer single-tube water pumping devices described above, the specific process of the water pumping process is:

[0011] Step 1: confirm the number of aquifers, water level and water richness of aquifers based on drilling exploration results;

[0012] Step 2, determining the lower pipe depth and diameter of the pump chamber pipe and the pumping pipes of each level of pumping sections according to the drilling information obtained in step 1, and processing and forming the single-hole multi-layer single-tube pumping device;

[0013] Step 3, determining a drilling structure for pumping water and forming a drilling hole according to the drilling information obtained in step 1;

[0014] Step 4, lowering the single-hole multi-layer single-tube water pumping device into the formed water pumping borehole;

[0015] Step five, pumping is carried out in the order of first up and then down. Before pumping, water stop inspection and well washing operations are carried out in sequence for each pumping section. After the pumping is completed, the corresponding pumping section is sealed, and then the partition assembly is opened to connect the upper and lower pumping sections and repeat the pumping process of the previous pumping section to carry out pumping operations for the next pumping section.

[0016] As a preferred embodiment of the above technical solution, in step 2, the single-hole multi-layer single-tube pumping device is processed into two sections, namely a pump chamber tube and a multi-stage pumping section, wherein a reducing portion is welded at the bottom of the pump chamber tube, and a temporary water stop is wrapped around the outer conical surface of the reducing portion.

[0017] As a preferred embodiment of the above technical solution, in step four, the pump chamber pipe is first lowered, and then the gap between the pump chamber pipe and the borehole at the upper edge of the temporary water stop is grouted and sealed, and then the multi-stage pumping section is lowered and welded to the bottom of the variable diameter part.

[0018] As a preferred embodiment of the above technical solution, in step five, the sealing treatment of the pumping section is carried out by cement slurry. After 6-8 hours of cement injection, the drill is promptly drilled to punch holes to the partition assembly to ensure that there is no cement in the hole and above the partition assembly, so as to facilitate the connection of the pumping pipes of the upper and lower pumping sections by rotating the drill rod to unscrew the upper positive buckle plug and start pumping water in the next pumping section.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] First, it shortens the construction period. Because the aperture becomes smaller and the upper and lower casings are eliminated, the construction period can be greatly shortened. According to the practical comparison of different schemes, this scheme can shorten the construction period by 30% compared with conventional multi-layer pumping drilling. Second, it reduces costs. Except for the pump chamber section, this scheme has a small aperture, a small casing, a short construction period, and a significant reduction in labor costs and material costs, reducing the cost ratio by 20%. Third, it ensures safety and improves the safety level of production and construction. By reducing the aperture and pipe diameter, the construction difficulty is reduced, the probability of accidents in the hole is reduced, and safe and efficient construction is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the device of the present invention.

[0022] Figure 2 A schematic diagram of the structure of a partition assembly.

[0023] The figure numbers are as follows: 1-pump chamber pipe, 2-drill hole, 3-reducing boss, 4-pumping pipe, 401-screen pipe section, 402-water stop sleeve, 5-water hole, 6-partition assembly, 601-lower reverse buckle base, 602 upper positive buckle plug, 7-temporary water stop, 8-anti-drop pad, 9-reducing part, 10-first stage pumping section, 11-second stage pumping section, 12-third stage pumping section. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0026] like Figure 1 A single-hole, multi-layer, single-tube pumping device is shown, comprising a pump chamber tube 1 and a multi-stage pumping section connected to the bottom of the pump chamber tube 1, wherein the multi-stage pumping sections are limited by a preset variable diameter boss 3 in the borehole 2, wherein the pumping section comprises a pumping pipe 4, wherein the diameter of the pumping pipe 4 is smaller than the diameter of the thinnest hole section in the borehole 2, a water hole 5 is provided in the upper half of the pumping pipe 4, the bottom of the pumping pipe 4 is sealedly connected to the corresponding variable diameter boss 3, and a partition assembly 6 is installed at the inner end of the pumping pipe 4, wherein the partition assembly 6 is used to control the on-off of the pumping pipe 4 of two adjacent pumping sections.

[0027] In this embodiment, the water pumping pipe 4 includes a screen pipe section 401 and a water stop sleeve 402, the water hole 5 is arranged on the screen pipe section 401, the water stop sleeve 402 is fixed to the bottom of the screen pipe section 401, the partition assembly 6 is fixed in the water stop sleeve 402, and the outer circle of the water stop sleeve 402 is wrapped with a temporary water stop 7.

[0028] In this embodiment, the partition assembly 6 includes a threaded lower reverse-button base 601 and an upper positive-button plug 602, the lower reverse-button base 601 is fixedly connected to the water-stop sleeve 402, and the upper positive-button plug 602 can be connected to the drill rod. By rotating the drill rod to unscrew the upper positive-button plug 602, the pumping pipe 4 of the upper and lower pumping sections can be connected. Figure 2 shown.

[0029] In this embodiment, the temporary waterstop 7 is made of kelp and expanded rubber, the lower edge of the temporary waterstop 7 abuts against the variable diameter boss 3 of the borehole 2, and the upper edge is limited by the anti-drop pad 8 fixed on the waterstop sleeve 402.

[0030] In this embodiment, the screen pipe section 401 of the first-stage pumping section is fixedly connected to the pump chamber pipe 1 via a reducing portion 9 , and the reducing portion 9 is limited by the reducing boss 3 on the borehole 2 .

[0031] In this embodiment, a temporary water stop 7 is wound on the outer conical surface of the diameter reducing portion 9. This embodiment is described by winding the temporary water stop 7 on the diameter reducing portion 9, so that the sealing effect of the gap between the pump chamber pipe 1 and the borehole 2 is better.

[0032] The reducing portion 9 can also directly abut against the reducing boss 3 of the borehole 2. At this time, the pump chamber pipe 1 and the multi-stage pumping section are processed into a whole and lowered into the pumping borehole 2 at one time, and then the gap between the pump chamber pipe 1 and the borehole 2 is directly sealed by grouting.

[0033] This embodiment is described by taking the three-stage pumping section as an example. Figure 1 The pumping section includes a first pumping section 10 , a second pumping section 11 and a third pumping section 12 .

[0034] Among them, the reducer 9 below the pump chamber pipe 1 is connected to the water pumping pipe 4 by welding or threading; the screen pipe section 401 and the water stop sleeve 402 of the water pumping pipe 4 have the same diameter at the top and bottom; the anti-slip pad 8 is located on the water stop sleeve 402, which is used to prevent the temporary water stop material from slipping off, and its fixing method is welding to the water stop sleeve 402; the temporary water stop 7 is composed of kelp and expanded rubber, and is externally wrapped around the water stop sleeve 402 and the reducer 9, wherein the temporary water stop 7 wrapped around the water stop sleeve 402 is located at the lower part of the anti-slip pad 8, with a length of not less than 1m, and an outer diameter that is basically the same as the anti-slip pad 8; the lower reverse buckle base 601 and the upper positive buckle plug 602 of the partition assembly 6 are connected by positive and negative threaded connections, and the upper positive buckle plug 602 is preferably designed to be conical, and the upper part of the upper positive buckle plug 602 is covered with plastic to prevent it from being filled, so as to facilitate its later unscrewing.

[0035] A single-hole multi-layer single-tube water pumping process, using any of the single-hole multi-layer single-tube water pumping devices described above, the specific process of the water pumping process is:

[0036] Step 1: confirm the number of aquifers, water level and water richness of aquifers based on drilling exploration results;

[0037] Step 2, determining the lower pipe depth and diameter of the pump chamber pipe and the pumping pipes of each level of pumping sections according to the drilling information obtained in step 1, and processing and forming the single-hole multi-layer single-tube pumping device;

[0038] Step 3, determining a drilling structure for pumping water according to the drilling information obtained in step 1 and forming a drilling hole 2;

[0039] Step 4, lowering the single-hole multi-layer single-tube water pumping device into the formed water pumping borehole 2;

[0040] Step five, pumping is carried out in the order of first up and then down. Before pumping, water stop inspection and well washing operations are carried out in sequence for each pumping section. After the pumping is completed, the corresponding pumping section is sealed, and then the partition component 6 is opened to connect the upper and lower pumping sections and repeat the pumping process of the previous pumping section to carry out pumping operations in the next pumping section.

[0041] In this embodiment, in step 2, the single-hole multi-layer single-tube pumping device is processed into two sections, namely a pump chamber tube 1 and a multi-stage pumping section, wherein a reducing portion 9 is welded at the bottom of the pump chamber tube 1, and a temporary water stop 7 is wrapped around the outer conical surface of the reducing portion 9.

[0042] In this embodiment, in step four, the pump chamber pipe 1 is first lowered, and then the gap between the pump chamber pipe 1 and the borehole 2 on the upper edge of the temporary water stop 7 is grouted and sealed, and then the multi-stage pumping section is lowered and welded to the bottom of the reducer 9.

[0043] In this embodiment, in step 5, the sealing treatment of the pumping section is sealed with cement slurry. After 6-8 hours of cement injection, the drill is promptly drilled to punch holes to the partition assembly to ensure that there is no cement in the hole and above the partition assembly, so that the upper and lower pumping sections can be connected by rotating the drill rod to unscrew the upper buckle plug 602, and the pumping of the next pumping section can be started. Specifically, the partition assembly is opened after the upper grouting and sealing hole is solidified for 72 hours.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single-hole multi-layer single-tube pumping device, characterized in that: It includes a pump chamber pipe and a multi-stage pumping section connected to the bottom of the pump chamber pipe. The multi-stage pumping sections are limited by variable diameter bosses preset in the borehole. The pumping section includes a pumping pipe. The diameter of the pumping pipe is smaller than the diameter of the thinnest hole section in the borehole. The upper half of the pumping pipe is provided with a water hole. The bottom of the pumping pipe is sealed and connected to the corresponding variable diameter boss. A partition assembly is installed at the inner end of the pumping pipe. The partition assembly is used to control the connection and disconnection of the pumping pipes of two adjacent pumping sections.

2. A single-hole multi-layer single-tube pumping device according to claim 1, characterized in that: The water pumping pipe includes a screen pipe section and a water-stopping sleeve. The water hole is arranged on the screen pipe section. The water-stopping sleeve is fixed to the bottom of the screen pipe section. The partition assembly is fixed in the water-stopping sleeve. The outer ring of the water-stopping sleeve is wrapped with a temporary water-stopping.

3. A single-hole multi-layer single-tube water pumping device according to claim 2, characterized in that: The partition assembly includes a threaded lower reverse-threaded base and an upper positive-threaded plug, the lower reverse-threaded base is fixedly connected to the water-stop sleeve, and the upper positive-threaded plug can be connected to the drill rod. By rotating the drill rod and unscrewing the upper positive-threaded plug, the pumping pipes of the upper and lower pumping sections can be connected.

4. A single-hole multi-layer single-tube pumping device according to claim 2, characterized in that: The temporary water stop is made of kelp and expanded rubber. The lower edge of the temporary water stop is against the variable diameter boss of the drilled hole, and the upper edge is limited by an anti-drop pad fixed on the water stop sleeve.

5. A single-hole multi-layer single-tube water pumping device according to claim 4, characterized in that: The screen pipe section of the first-stage pumping section is fixedly connected to the pump chamber pipe via a reducing portion, and the reducing portion is limited by a reducing boss on the drilled hole.

6. A single-hole multi-layer single-tube water pumping device according to claim 5, characterized in that: A temporary water stop is wound on the outer conical surface of the diameter-changing portion.

7. A single-hole multi-layer single-tube water pumping process, characterized in that: The single-hole multi-layer single-tube pumping device according to any one of claims 1 to 6 is used, and the specific process of the pumping process is as follows: Step 1: confirm the number of aquifers, water level and water richness of aquifers based on drilling exploration results; Step 2, determining the lower pipe depth and diameter of the pump chamber pipe and the pumping pipes of each level of pumping sections according to the drilling information obtained in step 1, and processing and forming the single-hole multi-layer single-tube pumping device; Step 3, determining a drilling structure for pumping water and forming a drilling hole according to the drilling information obtained in step 1; Step 4, lowering the single-hole multi-layer single-tube water pumping device into the formed water pumping borehole; Step five, pumping is carried out in the order of first up and then down. Before pumping, water stop inspection and well washing operations are carried out in sequence for each pumping section. After the pumping is completed, the corresponding pumping section is sealed, and then the partition assembly is opened to connect the upper and lower pumping sections and repeat the pumping process of the previous pumping section to carry out pumping operations for the next pumping section.

8. The single-hole multi-layer single-tube water pumping process according to claim 7, characterized in that: In step 2, the single-hole multi-layer single-tube pumping device is processed into two sections, namely a pump chamber tube and a multi-stage pumping section, wherein a reducing portion is welded at the bottom of the pump chamber tube, and a temporary water stop is wrapped around the outer conical surface of the reducing portion.

9. The single-hole multi-layer single-tube water pumping process according to claim 8, characterized in that: In step 4, the pump chamber pipe is first lowered, and then the gap between the pump chamber pipe and the borehole at the upper edge of the temporary water stop is grout-sealed, and then the multi-stage pumping section is lowered and welded to the bottom of the reducer.

10. The single-hole multi-layer single-tube water pumping process according to claim 7, characterized in that: In step five, the pumping section is sealed with cement slurry. After 6-8 hours of cement injection, the drill is promptly drilled to punch holes to the partition assembly to ensure that there is no cement in the hole and above the partition assembly, so as to facilitate the connection of the pumping pipes of the upper and lower pumping sections by rotating the drill rod to unscrew the upper positive buckle plug and start pumping water in the next pumping section.

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