Abnormal drill hole extraction device based on geological variation degree of coal mining

Abstract

The invention discloses an abnormal drill hole extraction device based on geological variability of coal mining, and relates to the field of sampling devices. An abnormal drill hole extraction device for geological variation based on coal mining comprises a plurality of groups of drill hole sampling pipes, and further comprises an inner pipe fixedly connected in the drill hole sampling pipes, and a plurality of groups of drill hole sampling pipes, and a cavity is formed between the inner pipe and the inner wall of each drill hole sampling pipe; the plurality of groups of mounting rings are connected in the inner pipe at equal intervals; the liquid inlet pipe is fixedly connected to the mounting ring, one end of the liquid inlet pipe is connected with the cavity, and the liquid inlet pipe is connected with a plurality of communicating pipes with electronic valves; according to the invention, the expansion air bag is continuously enlarged and shrunk, so that the space in a local area in the inner tube is shrunk, the local pressure is increased, the flowing speed of liquid is increased, the possibility of sample blockage is reduced, and meanwhile, the sample in the inner tube is continuously displaced through the size change of the expansion air bag, so that the possibility of blockage is further reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of sampling devices, and in particular, relates to an abnormal drilling extraction device based on geological variation of coal mining. Background Art

[0002] Geological variability is the abnormal variation characteristic of mineralization of ore deposits. In order to extract the abnormal variation characteristics, conduct sampling and testing, and provide decision-making basis for mineral exploration, an abnormal drilling extraction device for geological variability is needed.

[0003] Existing sampling devices generally include two stages: normal drilling and sampling. During normal drilling, the device adopts a double-wall drill pipe design, and water is introduced into the inner tube and the annular space to discharge slag at the same time; during sampling, the reverse circulation drilling principle is adopted, that is, water pressure enters through the annular space of the double-wall drill pipe, and the sample cut by the hydrojet sampling drill bit is blown out along the inner tube of the double-wall drill pipe under positive pressure, thereby achieving rapid sampling.

[0004] However, when the existing sampling device is in use, a large amount of mud will be generated due to the continuous contact between the drill bit and the geological layer during drilling. When sampling through the inner tube, the presence of mud will affect the flow rate of the liquid, thereby affecting the discharge of the sample in the liquid, which is not conducive to the rapid extraction of the sample and has certain shortcomings. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a sampling device that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: an abnormal borehole extraction device based on the geological variation of coal mining, including multiple sets of borehole sampling tubes, and also including:

[0007] An inner tube, fixedly connected in the borehole sampling tube, with a cavity between the inner tube and the inner wall of the borehole sampling tube;

[0008] A plurality of sets of mounting rings are connected in the inner tube at equal intervals;

[0009] A liquid inlet pipe is fixedly connected to the mounting ring, one end of the liquid inlet pipe is connected to the cavity, and a plurality of connecting pipes with electronic valves are connected to the liquid inlet pipe;

[0010] A plurality of groups of expansion airbags are fixedly connected to the mounting ring in an annular shape, the expansion ends of the expansion airbags face the axis of the inner tube, and the plurality of groups of connecting tubes are respectively connected to the plurality of groups of expansion airbags;

[0011] A plurality of discharge ports are arranged on the expansion airbag;

[0012] By injecting liquid into the cavity, the sample obtained by drilling is continuously moved upward through the inner tube. At the same time, the electronic valve in the connecting tube is indirectly opened, so that multiple groups of expansion airbags are continuously expanded, the pressure in the local area of ​​the inner tube is continuously changed, and the sample is quickly moved upward in the inner tube.

[0013] Furthermore, the mounting ring located at the top of the drilling sampling tube is fixedly connected in the inner tube, and the remaining mounting rings are slidably connected in the inner tube.

[0014] In order to facilitate the movable mounting ring to move up and down, further, a cylindrical airbag is connected between each two groups of the mounting rings, a secondary tube 1 is connected to the liquid inlet pipe, the secondary tube 1 is connected to the cylindrical airbag, and an electronic valve is arranged in the secondary tube 1.

[0015] In order to facilitate the flow of liquid, further, the liquid inlet pipe is connected to a second auxiliary pipe, and the second auxiliary pipe is a telescopic hose.

[0016] Furthermore, the inner tube is connected with a connecting tube 1, and the connecting tube 1 is connected to the liquid inlet tube at the top.

[0017] To facilitate drilling, further, one group of the drilling sampling tubes is fixedly connected with a drill bit.

[0018] In order to prevent samples at other depths above from entering the inner tube, an annular airbag is fixedly connected to the drilling sampling tube with the drill bit, and a connecting tube 2 with an electronic valve is connected to the drilling sampling tube, and the connecting tube 2 is connected to the annular airbag.

[0019] In order to increase the flow of liquid, further, the annular air bag is provided with a plurality of water outlets on one end close to the drill bit.

[0020] In order to facilitate the up and down movement, further, a limiting block is fixedly connected to the inner tube, and a limiting groove is arranged on the mounting ring, and the limiting groove matches the limiting block.

[0021] In order to facilitate installation, further, both ends of the drilling sampling tube are respectively provided with internal threads and external threads, and the internal threads match the external threads.

[0022] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention reduces the space in the local area of ​​the inner tube by continuously expanding and contracting the expansion balloon, thereby increasing the local pressure, increasing the flow rate of the liquid, and reducing the possibility of sample blockage. At the same time, by changing the size of the expansion balloon, the sample located in the inner tube is continuously displaced, further reducing the possibility of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 The structure of an abnormal drilling extraction device based on the geological variation of coal mining proposed by the present invention is shown in FIG. Figure 1 ;

[0025] Figure 2 The structure of an abnormal drilling extraction device based on the geological variation of coal mining proposed by the present invention is shown in FIG. Figure 2 ;

[0026] Figure 3 A schematic diagram of the cross-sectional structure of an abnormal drilling extraction device based on the geological variation of coal mining proposed by the present invention Figure 1 ;

[0027] Figure 4 The invention proposes an abnormal drilling extraction device based on the geological variation of coal mining. Figure 3 The structural diagram of part A in the figure;

[0028] Figure 5 The invention proposes an abnormal drilling extraction device based on the geological variation of coal mining. Figure 3 The structural diagram of part B;

[0029] Figure 6 The invention proposes an abnormal drilling extraction device based on the geological variation of coal mining. Figure 4 Schematic diagram of the structure of part C;

[0030] Figure 7 A schematic diagram of the cross-sectional structure of an abnormal drilling extraction device based on the geological variation of coal mining proposed by the present invention Figure 2 ;

[0031] Figure 8 The invention proposes an abnormal drilling extraction device based on the geological variation of coal mining. Figure 7 The structural diagram of the D part;

[0032] Fig. 9 The invention proposes an abnormal drilling extraction device based on the geological variation of coal mining. Figure 7 The structural diagram of the E part;

[0033] Fig.10 A schematic diagram of the cross-sectional structure of an abnormal drilling extraction device based on the geological variation of coal mining proposed by the present invention Figure 3 ;

[0034] Fig.11 The invention proposes an abnormal drilling extraction device based on the geological variation of coal mining. Fig.10The structural diagram of the F part;

[0035] Fig.12 Schematic diagram of the structure of the inner tube, expansion airbag and cylindrical airbag in the abnormal drilling extraction device based on the geological variation of coal mining proposed by the present invention Figure 1 ;

[0036] Fig.13 Schematic diagram of the structure of the inner tube, expansion airbag and cylindrical airbag in the abnormal drilling extraction device based on the geological variation of coal mining proposed by the present invention Figure 2 .

[0037] In the figure: 1. drilling sampling tube; 2. inner tube; 201. limit block; 202. connecting tube 1; 3. mounting ring; 301. limit groove; 4. expansion airbag; 401. discharge port; 402. liquid inlet pipe; 403. auxiliary tube 1; 404. auxiliary tube 2; 5. cylindrical airbag; 6. annular airbag; 601. connecting tube 2; 602. water outlet; 7. drill bit. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0039] Embodiment 1:

[0040] Reference Figure 1-11 , an abnormal borehole extraction device based on the geological variation of coal mining, including multiple groups of borehole sampling tubes 1, and also including: an inner tube 2, fixedly connected to the borehole sampling tube 1, with a cavity between the inner tube 2 and the inner wall of the borehole sampling tube 1; multiple groups of mounting rings 3, connected to the inner tube 2 at equal intervals; a liquid inlet pipe 402, fixedly connected to the mounting ring 3, one end of the liquid inlet pipe 402 is connected to the cavity, and multiple groups of connecting pipes with electronic valves are connected to the liquid inlet pipe 402; multiple groups of expansion airbags 4, annularly fixedly connected to the mounting ring 3, the expansion end of the expansion airbag 4 is toward the axis of the inner tube 2, and multiple The groups of connecting pipes are respectively connected to the groups of expansion airbags 4; the groups of discharge ports 401 are all arranged on the expansion airbags 4; by injecting liquid into the cavity, the sample obtained by drilling is continuously moved upward through the inner tube 2, and at the same time, the electronic valve in the connecting pipe is indirectly opened, so that the groups of expansion airbags 4 are continuously expanded, so that the local area pressure in the inner tube 2 is continuously changed, and the sample is quickly moved upward in the inner tube 2, and a drill bit 7 is fixedly connected to one group of drilling sampling tubes 1, and internal threads and external threads are respectively arranged on both ends of the drilling sampling tube 1, and the internal threads and external threads match each other.

[0041] When the device is used at 12, it needs to cooperate with a drilling sampler. The drilling sampler tube 1 equipped with a drill bit 7 is matched with the drilling sampler, and then a hole is drilled in the coal mine where sampling is required. While drilling, water is continuously injected into the inner tube 2 and the cavity, so that the water is discharged through the gap between the drilling sampler tube 1 and the borehole. At this time, the water can cool down the drill bit 7 while preventing the residue and mud generated during drilling from entering the inner tube 2 and the cavity. When drilling, new drilling sampler tubes 1 are continuously added through the threads to increase the overall length, thereby sampling the geological variation area where depth is required.

[0042] When sampling is required after the drilling is completed, the cavity continues to input liquid, while the inner tube 2 is no longer injected with liquid. Since the continuous inflow of liquid during the previous drilling will cause the drilling sampling tube 1 with the drill bit 7 to be immersed in water, the inner tube 2 is no longer injected with water, and the water near the drill bit 7 will naturally enter the inner tube 2 and then move upward. The staff can set up a collection box on the ground to collect the extracted samples.

[0043] When sampling, the electronic valve in the connecting tube is opened. Since there is water in the cavity, the water will enter the liquid inlet tube 402 through the connecting tube 202, and then enter the expansion airbag 4 through the connecting tube. At this time, the expansion airbag 4 will expand accordingly, and the expansion of the expansion airbag 4 will squeeze the space in the inner tube 2, thereby achieving a pressurization effect, increasing the liquid pressure, and then flowing at a faster speed. At the same time, the mounting ring 3 is provided with multiple groups, so that the expansion airbag 4 becomes multiple layers up and down. At this time, if the expansion airbag 4 from bottom to top is expanded in sequence, in this cycle, a layer-by-layer pressurization effect will be produced, so that the liquid flows quickly, thereby driving the rapid flow of the sample;

[0044] At the same time, the expansion and contraction of the expansion balloon 4 will have a specific peristaltic effect, squeezing some larger samples so that they are continuously transported and moved upward to avoid these larger samples being stuck in the inner tube 2. At this time, multiple groups of expansion balloons 4 need to be spaced relatively small to effectively assist in transportation through peristalsis. Specifically, taking the expansion balloons 4 of five groups of mounting rings 3 as an example, they are conventionally in a contracted state, and the equal spacing should be relatively close, and the interval between two adjacent mounting rings 3 is small. In order to clearly show the gap in the figure, one is expanded first, then two is expanded, and then three is expanded. Then, when one is contracted, four is gradually expanded, then two is contracted, and five is gradually expanded, and so on, similar to the peristalsis of the muscles of the esophagus, the food is continuously pushed to move, that is, the liquid in the inner tube 2 is continuously pushed upward;

[0045] At the same time, the expansion and contraction of the expansion balloon 4 will squeeze the sample in the contact liquid, thereby causing the sample to continuously move in the liquid. When transporting some samples that are relatively long, it can avoid the situation where the sample is stuck in the inner tube 2.

[0046] Since there are multiple groups of expansion airbags 4 on a mounting ring 3, the expansion size of the expansion airbags 4 can be controlled by only using the electronic valve in the connecting tube. At this time, any one or more groups of expansion airbags 4 on a mounting ring 3 can be set to expand with liquid, while other groups do not. This will further disturb the flow of the sample in the liquid and prevent the sample from being stuck in the inner tube 2. It can also have an alternative peristaltic effect. The specific control requires the opening and closing of the electronic valve to cooperate.

[0047] Specifically, since there is a certain water pressure in the inner tube 2, if the inflatable airbag 4 is not replenished with water through the connecting tube, the water in itself will be discharged through the discharge port 401 under the action of the external water pressure, and then it will shrink and return to its original position.

[0048] Embodiment 2:

[0049] Reference Figure 4-13 , an abnormal drilling extraction device based on the geological variation of coal mining, which is basically the same as Example 1, and further: the mounting ring 3 located at the top of the drilling sampling tube 1 is fixedly connected to the inner tube 2, and the remaining mounting rings 3 are slidably connected to the inner tube 2, and a cylindrical airbag 5 is connected between every two groups of mounting rings 3, and a sub-tube 1 403 is connected to the liquid inlet tube 402, and the sub-tube 1 403 is connected to the cylindrical airbag 5, and an electronic valve is arranged in the sub-tube 1 403, and a liquid outlet is connected to the cylindrical airbag 5, and a sub-tube 2 404 is connected to the liquid inlet tube 402, and the sub-tube 2 404 is a telescopic hose, and a connecting tube 1 202 is connected to the inner tube 2, and the connecting tube 1 202 is connected to the top liquid inlet tube 402, and a limiting block 201 is fixedly connected to the inner tube 2, and a limiting groove 301 is arranged on the mounting ring 3, and the limiting groove 301 matches the limiting block 201.

[0050] like Figure 7 As shown, the mounting rings 3 in the device are provided with multiple groups, the top mounting ring 3 is fixed on the inner tube 2, and the remaining mounting rings 3 can slide in the inner tube 2 and are separated by the cylindrical airbags 5, wherein a limiting plate should be provided at the bottom to prevent the mounting rings 3 from falling off.

[0051] At the same time, the liquid inlet pipe 402 on the uppermost mounting ring 3 in the device is the main water supply pipe, and the lower ones are auxiliaryly connected through the auxiliary pipe 2 404 in turn.

[0052] At the same time, when in use, due to the setting of the cylindrical airbag 5, the length of the cylindrical airbag 5 can be controlled by the electronic valve in the auxiliary pipe 403, that is, the water in the cylindrical airbag 5 will naturally be discharged through the liquid outlet. If the liquid is not replenished through the auxiliary pipe 403, it will shrink quickly.

[0053] Specifically, when in use, the electronic valve on the auxiliary pipe 403 can be indirectly opened to make the cylindrical airbag 5 continuously extend and shorten, and the sliding mounting ring 3 will be continuously moved up and down. At this time, when the expansion airbag 4 is inflated from bottom to top, when the expansion airbag 4 is inflated, the water supply to the cylindrical airbag 5 is stopped, and the cylindrical airbag 5 will shorten rapidly, and the two groups of mounting rings 3 will be continuously approached. Because the expansion airbag 4 is in an expanded state at this time, coupled with the contraction of the cylindrical airbag 5, the expansion airbag 4 will quickly carry the liquid between the two groups of expansion airbags 4 upward, thereby playing the role of auxiliary pressurization. At this time, the position of local pressurization can be continuously adjusted to enhance the pressurization capacity.

[0054] After the subsequent expansion airbag 4 returns to its normal state, the cylindrical airbag 5 is filled with water and restored, and then the expansion airbag 4 is restored to its normal state when it is not expanded, so that it can be filled with water and expanded for use again.

[0055] Embodiment 3:

[0056] Reference Figure 5 , Fig. 9 , an abnormal drilling extraction device based on the geological variation of coal mining, is basically the same as Example 2, and further: an annular airbag 6 is fixedly connected to a drilling sampling tube 1 with a drill bit 7, and a connecting tube 2 601 with an electronic valve is connected to the drilling sampling tube 1, and the connecting tube 2 601 is connected to the annular airbag 6, and the annular airbag 6 is provided with multiple groups of water outlets 602 on one end close to the drill bit 7.

[0057] Before sampling, the electronic valve in the connecting tube 2 601 can be opened first, so that the liquid in the cavity can quickly enter the annular airbag 6, and then the annular airbag 6 can be expanded, so that the annular airbag 6 is tightly attached to the inner wall of the hole produced by the drilling, thereby reducing the debris from above falling to the drill bit 7. At the same time, the mud produced by the previous drilling will not be able to enter the drill bit 7. At this time, only a small amount of mud will appear at the drill bit 7, which can prevent the mud and debris from other depths above from entering the inner tube 2 and mixing with the required sample, thereby reducing errors and facilitating improving the accuracy of detection.

[0058] The water outlet 602 can quickly blow the sample mined by the drill bit 7 to the inner tube 2, so as to facilitate the rapid discharge of the sample.

[0059] At the same time, the annular airbag 6 will form a semi-enclosed space outside the drill bit 7. At this time, the water discharged from the cavity will quickly enter the semi-enclosed space and then enter the inner tube 2, so that the geological layer sample mined by the drill bit will quickly enter the inner tube 2 and then be discharged.

[0060] The present invention reduces the space in a local area of ​​the inner tube 2 by continuously expanding and contracting the expansion balloon 4, thereby increasing the local pressure, increasing the flow rate of the liquid, and reducing the possibility of sample blockage. At the same time, the size of the expansion balloon 4 changes, so that the sample located in the inner tube 2 is continuously displaced, further reducing the possibility of blockage.

[0061] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. An abnormal borehole extraction device based on geological variability of coal mining, comprising a plurality of sets of borehole sampling tubes (1), characterized in that: Also includes: An inner tube (2) is fixedly connected inside the borehole sampling tube (1), and a cavity is provided between the inner tube (2) and the inner wall of the borehole sampling tube (1); A plurality of mounting rings (3) are connected at equal intervals inside the inner tube (2); A liquid inlet pipe (402) is fixedly connected to the mounting ring (3), one end of the liquid inlet pipe (402) is connected to the cavity, and a plurality of connecting pipes with electronic valves are connected to the liquid inlet pipe (402); A plurality of expansion air bags (4) are annularly fixedly connected to the mounting ring (3), the expansion ends of the expansion air bags (4) facing the axis of the inner tube (2), and the plurality of connecting tubes are respectively connected to the plurality of expansion air bags (4); A plurality of discharge ports (401) are arranged on the expansion airbag (4); By injecting liquid into the cavity, the sample obtained by drilling is continuously moved upward through the inner tube (2), and at the same time, the electronic valve in the connecting tube is indirectly opened, so that the multiple groups of expansion airbags (4) are continuously expanded, so that the pressure in the local area of ​​the inner tube (2) is continuously changed, and the sample is quickly moved upward in the inner tube (2).

2. The abnormal drilling hole extraction device based on the geological variation of coal mining according to claim 1 is characterized in that: The mounting ring (3) located at the top of the borehole sampling tube (1) is fixedly connected to the inner tube (2), and the remaining mounting rings (3) are slidably connected to the inner tube (2).

3. The abnormal drilling hole extraction device based on the geological variation of coal mining according to claim 2 is characterized in that: A cylindrical airbag (5) is connected between each two groups of the mounting rings (3); a secondary pipe (403) is connected to the liquid inlet pipe (402); the secondary pipe (403) is connected to the cylindrical airbag (5); an electronic valve is arranged in the secondary pipe (403); and the cylindrical airbag (5) is connected to a liquid outlet.

4. The abnormal drilling hole extraction device based on the geological variation of coal mining according to claim 3 is characterized in that: The liquid inlet pipe (402) is connected to a second auxiliary pipe (404), and the second auxiliary pipe (404) is a telescopic hose.

5. The abnormal drilling hole extraction device based on the geological variation of coal mining according to claim 4 is characterized in that: The inner tube (2) is connected to a connecting tube 1 (202), and the connecting tube 1 (202) is connected to the liquid inlet tube (402) at the top.

6. The abnormal drilling hole extraction device based on the geological variation of coal mining according to claim 1 is characterized in that: A drill bit (7) is fixedly connected to one group of the drilling sampling tubes (1).

7. The abnormal borehole extraction device based on geological variation of coal mining according to claim 6, characterized in that: An annular airbag (6) is fixedly connected to the drilling sampling tube (1) having the drill bit (7), and a second connecting tube (601) having an electronic valve is connected to the drilling sampling tube (1), and the second connecting tube (601) is connected to the annular airbag (6).

8. The abnormal borehole extraction device based on geological variation of coal mining according to claim 7, characterized in that: The annular air bag (6) is provided with a plurality of water outlets (602) at one end close to the drill bit (7).

9. The abnormal drilling hole extraction device based on the geological variation of coal mining according to claim 3 is characterized in that: A limiting block (201) is fixedly connected to the inner tube (2), and a limiting groove (301) is provided on the mounting ring (3), wherein the limiting groove (301) matches the limiting block (201).

10. The abnormal drilling hole extraction device based on the geological variation of coal mining according to claim 1 is characterized in that: An internal thread and an external thread are respectively arranged on both ends of the drilling sampling tube (1), and the internal thread matches the external thread.

Images