CN110905590A - Device is gone into under hole sealing pipe - Google Patents
Device is gone into under hole sealing pipe Download PDFInfo
- Publication number
- CN110905590A CN110905590A CN201911284728.0A CN201911284728A CN110905590A CN 110905590 A CN110905590 A CN 110905590A CN 201911284728 A CN201911284728 A CN 201911284728A CN 110905590 A CN110905590 A CN 110905590A
- Authority
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- China
- Prior art keywords
- guide rail
- sealing pipe
- hole sealing
- hole
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 230000001174 ascending effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 6
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000009347 mechanical transmission Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
- Drilling And Boring (AREA)
Abstract
The invention provides a hole sealing pipe running-in device, which comprises a support, an operating system, a workbench, a straightening device and a clamping device, wherein the device can be used for drilling holes at different angles by adjusting the height of the support, the operating device realizes the functions of clamping, feeding, loosening and withdrawing of the clamping device through mechanical transmission, the straightening device is fixed on the workbench and is used for straightening a disc-shaped pvc hole sealing pipe so as to be conveniently sent into a drilled hole, and the clamping device realizes the running-in of the hole sealing pipe by moving along a guide rail. The beneficial effects are as follows: the device has changed original workman's manual pipe conveying operation, can improve hole sealing efficiency of construction, improves the operation security in the pit, has the significance to coal mine safety in production.
Description
Technical Field
The invention relates to the technical field of coal mine underground hole sealing construction, in particular to a device for inserting a hole sealing pipe into a well.
Background
In order to ensure the safety production of underground coal mines, coal seam gas needs to be extracted before tunneling, so a certain number of drill holes need to be constructed in the coal seam, but due to the influences of coal quality change, geological factors, stress and other factors, the drill holes are easy to collapse and block, and the extraction effect is influenced. In order to improve the gas extraction effect, the PVC hole sealing pipe is put into a drilled hole in the mine, then the drilled hole is sealed and fixed, and the gas extraction is carried out through the hole sealing pipe.
At present, in the hole sealing process in the underground coal mine, the pipe is generally manually arranged, and the construction operation is time-consuming and labor-consuming and low in efficiency for drilling holes at various angles. PVC hole sealing pipe of colliery purchase is the disc when using, and is more difficult when artifical low tube to because crooked, hole sealing pipe easily blocks in the drilling, and workman intensity of labour is big. For a drill hole with longer hole sealing length, the risk that a hole sealing pipe falls off to hurt people exists during hole sealing.
Disclosure of Invention
The invention provides a hole sealing pipe running-in device, which aims to solve the problems in the prior art, improve the hole sealing construction efficiency and reduce the labor intensity of workers.
The technical scheme of the invention is realized as follows:
the utility model provides a device is gone into under to hole-sealing pipe, the device comprises support (1), operating means (2), workstation (3), straightener (4), clamping device (5), the upper end of many supports (1) is articulated with workstation (3), support (1) totally has four in the device, be the symmetric distribution at workstation (3) downside, operating means (2) are installed in workstation (3) front side, straightener (4) and clamping device (5) are fixed on workstation (3), straightener (4) are located in clamping device (5) front side, hole-sealing pipe (6) are from the front to the back and are passed straightener (4) and clamping device (5) in proper order.
Further, the support (1) is composed of an inner shaft (11), an end cover (12), a positioning pin (13), an outer rod (14) and support legs (15), the outer rod (14) is of a cavity structure, the end cover (12) is installed at the top of the outer rod, the size of a middle hole of the end cover (12) is consistent with that of the inner shaft (11), the inner shaft (11) is sleeved in the outer rod (14), and the bottom of the outer rod is connected with the support legs (15) through hinges; the whole inner shaft (11) is of an inverted T-shaped structure, the large-diameter part at the bottom of the inner shaft is arranged in the outer rod (14), and the top of the inner shaft is hinged with the workbench (3); positioning holes with the same aperture are uniformly distributed on the outer rod (14) and the inner shaft (11) along the axial direction, and positioning pins (13) are inserted into the positioning holes.
Further, operating means (2) are by left guide rail (21), right guide rail (22), lead screw (23), pinion (24), gear wheel (25), driving shaft (26), handle (27) are constituteed, install on workstation (3) with right guide rail (22) parallel equal altitude left guide rail (21), the guide rail sliding tray has all been seted up at the middle part of left guide rail (21) and right guide rail (22), install lead screw (23) in the guide rail sliding tray, one end at two lead screws (23) all is equipped with pinion (24), still install driving shaft (26) between left guide rail (21) and right guide rail (22), one end at driving shaft (26) is equipped with gear wheel (25) and handle (27), gear wheel (25) and two pinion (24) meshing.
Further, the straightening device (4) consists of a left roller (41), a right roller (42), anti-skid gaskets (43) and a mounting shaft (44), wherein the left roller (41) and the right roller (42) both adopt concave structures and are matched with the excircle of the hole sealing pipe (6), and the anti-skid gaskets (43) are uniformly arranged on the circumferences of the left roller (41) and the right roller (42); the left roller (41) and the right roller (42) are installed on the workbench (3) through an installation shaft (44) and can rotate along the axis, and the center distance between the left roller (41) and the right roller (42) can be adjusted according to the diameter of the hole sealing pipe (6).
Furthermore, the clamping device (5) consists of a left sliding block (51), a right sliding block (52), an anti-skid gasket (53), a cross rod (54), a pin shaft (55), a positioning sleeve (56), a connecting rod (57) and a pulley (58), wherein the left sliding block (51) and the right sliding block (52) are respectively arranged in the left guide rail (21) and the right guide rail (22), move along a straight line and are matched with the lead screw (23) through an internal thread hole; the cross rod (54) is respectively connected with the right sliding block (52) and the connecting rod (57) through a pin shaft (55), the connecting rod (57) is sleeved in the positioning sleeve (56) and moves up and down along the axis of the sleeve, an anti-skid gasket (53) is arranged on the part, in contact with the hole sealing pipe (6), of the front end of the cross rod (54), and the up-and-down movement of the connecting rod (57) is realized through the movement of a pulley (58) at the bottom.
The right guide rail (22) is of a double-groove structure, one groove is matched with the right sliding block (52), one side of the other groove is provided with a rail groove (221), the rail groove (221) is an elliptical groove with two high ends and a low middle part, the pulley (58) moves in the rail groove (221) along the rail groove, the pulley (58) moves for a circle along the rail groove (221), and the connecting rod (57) achieves ascending, translation, descending and translation.
The invention has the beneficial effects that:
1. the device changes the original manual pipe conveying operation of workers, can improve the hole sealing construction efficiency, improves the safety of underground operation, and has important significance for coal mine safety production;
2. the straightening device is arranged, when the clamping device drives the hole sealing pipe to advance, the two rollers rotate along with the hole sealing pipe, so that the hole sealing pipe is guaranteed to be fed linearly after passing through the rollers, and the straightening function is realized;
3. the clamping device is arranged to realize clamping, feeding, loosening and withdrawing of the hole sealing pipe in a movement period, so that automatic pipe conveying and construction are realized;
4. the height-adjustable support is arranged, and drilling at different angles can be realized by adjusting the height of the support.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a stent;
FIG. 3 is a half-sectional view of the stent;
FIG. 4 is a schematic structural view of an operating device;
FIG. 5 is a schematic structural view of a right rail;
FIG. 6 is a schematic view showing the structure of a straightening apparatus;
FIG. 7 is a top view of the straightening apparatus;
FIG. 8 is a schematic structural view of the clamping device;
fig. 9 is a perspective view of the clamping device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
A down-feeding device for a hole sealing pipe as shown in figures 1-9 comprises a plurality of supports 1, an operating device 2, a workbench 3, a straightening device 4 and a clamping device 5, wherein the upper ends of the supports 1 are hinged with the workbench 3, the number of the supports 1 in the device is four, the supports are symmetrically distributed on the lower side of the workbench 3, the operating device 2 is arranged on the front side of the workbench 3, the straightening device 4 and the clamping device 5 are fixed on the workbench 3, the straightening device 4 is positioned on the front side of the clamping device 5, and the hole sealing pipe 6 sequentially passes through the straightening device 4 and the clamping device 5 from front to back.
The support 1 consists of an inner shaft 11, an end cover 12, a positioning pin 13, an outer rod 14 and support legs 15, wherein the outer rod 14 is of a cavity structure, the end cover 12 is installed at the top of the outer rod, the size of a hole in the end cover 12 is consistent with that of the inner shaft 11, the inner shaft 11 is sleeved in the outer rod 14, and the bottom of the outer rod is connected with the support legs 15 through hinges; the whole inner shaft 11 is of an inverted T-shaped structure, the large-diameter part at the bottom of the inner shaft is arranged in the outer rod 14, and the top of the inner shaft is hinged with the workbench 3; positioning holes with the same aperture are uniformly distributed on the outer rod 14 and the inner shaft 11 along the axial direction, and positioning pins 13 are inserted into the positioning holes.
The operating device 2 comprises a left guide rail 21, a right guide rail 22, a lead screw 23, a pinion 24, a gearwheel 25, a driving shaft 26 and a handle 27, wherein the left guide rail 21 and the right guide rail 22 are arranged on the workbench 3 in parallel and at the same height, guide rail sliding grooves are formed in the middle parts of the left guide rail 21 and the right guide rail 22, the lead screw 23 is arranged in each guide rail sliding groove, the pinion 24 is arranged at one end of each of the two lead screws 23, the driving shaft 26 is further arranged between the left guide rail 21 and the right guide rail 22, the gearwheel 25 and the handle 27 are arranged at one end of the driving shaft 26, and the gearwheel 25 is meshed with.
The straightening device 4 consists of a left roller 41, a right roller 42, anti-skid gaskets 43 and a mounting shaft 44, wherein the left roller 41 and the right roller 42 both adopt concave structures and are matched with the excircle of the hole sealing pipe 6, and the anti-skid gaskets 43 are uniformly distributed and mounted on the circumferences of the left roller 41 and the right roller 42; the left roller 41 and the right roller 42 are mounted on the worktable 3 through a mounting shaft 44 and can rotate along the axial center, and the center distance between the left roller 41 and the right roller 42 can be adjusted according to the diameter of the hole sealing pipe 6.
The clamping device 5 consists of a left sliding block 51, a right sliding block 52, an anti-skidding gasket 53, a cross bar 54, a pin shaft 55, a positioning sleeve 56, a connecting rod 57 and a pulley 58, wherein the left sliding block 51 and the right sliding block 52 are respectively arranged in the left guide rail 21 and the right guide rail 22, move along a straight line and are matched with the lead screw 23 through an internal threaded hole; the cross rod 54 is respectively connected with the right sliding block 52 and a connecting rod 57 through a pin shaft 55, the connecting rod 57 is sleeved in a positioning sleeve 56 and moves up and down along the axis of the sleeve, the anti-skid gasket 53 is arranged on the part, in contact with the hole sealing pipe 6, of the front end of the cross rod 54, and the up-and-down movement of the connecting rod 57 is realized through the movement of a pulley 58 at the bottom.
The right guide rail 22 is of a double-groove structure, one groove is matched with the right sliding block 52, one side of the other groove is provided with a track groove 221, the track groove 221 is an elliptical groove with two high ends and a low middle part, the pulley 58 moves in the track groove 221 along the track groove, the pulley 58 moves for a circle along the track groove 221, the connecting rod 57 achieves ascending, translation, descending and translation, meanwhile, the sliding block 52 moves back and forth along the guide rail, and through parameter matching, the clamping, feeding, loosening and withdrawing of the hole sealing pipe 6 are achieved.
The use process of the device is as follows: firstly, the height of a bracket 1 is adjusted according to the drilling angle to ensure that the hole sealing pipe 6 and the drilling hole are coaxial, then one end of the hole sealing pipe 6 passes through the middle position of a straightening device 4 and is placed in the middle of a clamping device 4, an operator 27 is rotated in the positive direction, the transmission sequentially passes through a big gear 25, a small gear 24, a lead screw 23, a left slide block 51 and a right slide block 52, while the two sliders are moved, the pulley 58 on the right slider 52 is lifted along the circular portion of the front end of the rail groove 221, thereby clamping the blind pipe by the movement of the link 57, in the process of moving the slide block continuously, the pulley moves along the upper horizontal part of the track groove 221, the clamping force can be kept, the hole sealing pipe 6 is driven to be put into a drill hole, in the process of hole sealing and continuous feeding of the hole sealing pipe 6, two rollers in the straightening device 4 rotate along with the hole sealing pipe, so that the straightening device 4 and the clamping device 5 keep a line of two points, the straightening is realized, and the hole sealing pipe 6 is convenient to drop; when the clamping device 5 moves to the end of the guide rail, the pulley 58 moves to the lower side along the circular part of the rail groove 221, the clamping device 5 is loosened through the connecting rod 57, the operating handle 27 is rotated reversely, the sliding block moves backwards along the guide rail, meanwhile, the pulley 58 continues to move along the horizontal rail at the lower side of the rail groove 221, and the cross rod 54 is kept loosened until the structure initial position is reached, namely, a pipe laying operation cycle is completed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides a device is gone into to hole-sealing pipe, characterized in that, the device comprises support (1), operating means (2), workstation (3), straightener (4), clamping device (5), the upper end of many supports (1) is articulated with workstation (3), support (1) totally has four in the device, be the symmetric distribution at workstation (3) downside, operating means (2) are installed in workstation (3) front side, straightener (4) and clamping device (5) are fixed on workstation (3), straightener (4) are located in clamping device (5) front side, hole-sealing pipe (6) are from the front to the back and pass straightener (4) and clamping device (5) in proper order.
2. The hole sealing pipe running device according to claim 1, wherein: the support (1) consists of an inner shaft (11), an end cover (12), a positioning pin (13), an outer rod (14) and support legs (15), the outer rod (14) is of a cavity structure, the end cover (12) is installed at the top of the outer rod, the size of a middle hole of the end cover (12) is consistent with that of the inner shaft (11), the inner shaft (11) is sleeved in the outer rod (14), and the bottom of the outer rod is connected with the support legs (15) through hinges; the whole inner shaft (11) is of an inverted T-shaped structure, the large-diameter part at the bottom of the inner shaft is arranged in the outer rod (14), and the top of the inner shaft is hinged with the workbench (3); positioning holes with the same aperture are uniformly distributed on the outer rod (14) and the inner shaft (11) along the axial direction, and positioning pins (13) are inserted into the positioning holes.
3. The hole sealing pipe running device according to claim 1, wherein: operating means (2) are by left guide rail (21), right guide rail (22), lead screw (23), pinion (24), gear wheel (25), driving shaft (26), handle (27) are constituteed, install on workstation (3) with right guide rail (22) parallel equal altitude left guide rail (21), the guide rail sliding tray has all been seted up at the middle part of left guide rail (21) and right guide rail (22), install lead screw (23) in the guide rail sliding tray, one end at two lead screws (23) all is equipped with pinion (24), still install driving shaft (26) between left guide rail (21) and right guide rail (22), one end at driving shaft (26) is equipped with gear wheel (25) and handle (27), gear wheel (25) and two pinion (24) meshing.
4. The hole sealing pipe running device according to claim 1, wherein: the straightening device (4) consists of a left roller (41), a right roller (42), anti-skid gaskets (43) and a mounting shaft (44), wherein the left roller (41) and the right roller (42) both adopt concave structures and are matched with the excircle of the hole sealing pipe (6), and the anti-skid gaskets (43) are uniformly arranged on the upper circumferences of the left roller (41) and the right roller (42); the left roller (41) and the right roller (42) are installed on the workbench (3) through an installation shaft (44) and can rotate along the axis, and the center distance between the left roller (41) and the right roller (42) can be adjusted according to the diameter of the hole sealing pipe (6).
5. The hole sealing pipe running device according to claim 1, wherein: the clamping device (5) consists of a left sliding block (51), a right sliding block (52), an anti-skid gasket (53), a cross bar (54), a pin shaft (55), a positioning sleeve (56), a connecting rod (57) and a pulley (58), wherein the left sliding block (51) and the right sliding block (52) are respectively arranged in the left guide rail (21) and the right guide rail (22), move along a straight line and are matched with the lead screw (23) through an internal thread hole; the cross rod (54) is respectively connected with the right sliding block (52) and the connecting rod (57) through a pin shaft (55), the connecting rod (57) is sleeved in the positioning sleeve (56) and moves up and down along the axis of the sleeve, an anti-skid gasket (53) is arranged on the part, in contact with the hole sealing pipe (6), of the front end of the cross rod (54), and the up-and-down movement of the connecting rod (57) is realized through the movement of a pulley (58) at the bottom.
6. The hole-sealing pipe running-in device according to claim 3 or 5, characterized in that: the right guide rail (22) is of a double-groove structure, one groove is matched with the right sliding block (52), one side of the other groove is provided with a rail groove (221), the rail groove (221) is an elliptical groove with two high ends and a low middle part, the pulley (58) moves in the rail groove (221) along the rail groove, the pulley (58) moves for a circle along the rail groove (221), and the connecting rod (57) achieves ascending, translation, descending and translation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284728.0A CN110905590B (en) | 2019-12-13 | 2019-12-13 | Hole sealing pipe feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284728.0A CN110905590B (en) | 2019-12-13 | 2019-12-13 | Hole sealing pipe feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110905590A true CN110905590A (en) | 2020-03-24 |
| CN110905590B CN110905590B (en) | 2024-08-13 |
Family
ID=69824412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911284728.0A Active CN110905590B (en) | 2019-12-13 | 2019-12-13 | Hole sealing pipe feeding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110905590B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343512A (en) * | 2020-10-30 | 2021-02-09 | 湖南达道新能源开发有限公司 | Auxiliary laying device for laying pipelines in geothermal well |
| CN114151030A (en) * | 2021-12-02 | 2022-03-08 | 中国煤炭地质总局一一九勘探队 | Hole sealing device applied to geological exploration and use method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948129A (en) * | 2015-07-02 | 2015-09-30 | 淮南矿业(集团)有限责任公司 | Hole sealing pipe placing device |
| CN207795147U (en) * | 2018-01-20 | 2018-08-31 | 仝耀军 | A kind of layer-through drilling separate type whole process gas drainage hole sealing device |
| CN110145259A (en) * | 2019-05-31 | 2019-08-20 | 贵州大学 | A kind of automatic continuous drilling machine |
| WO2019210657A1 (en) * | 2018-05-04 | 2019-11-07 | 中国矿业大学 | Integrated hole sealing device for loose blasting and water injection of underground well deep hole |
| CN211598741U (en) * | 2019-12-13 | 2020-09-29 | 河南能源化工集团研究总院有限公司 | Device is gone into under hole sealing pipe |
-
2019
- 2019-12-13 CN CN201911284728.0A patent/CN110905590B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948129A (en) * | 2015-07-02 | 2015-09-30 | 淮南矿业(集团)有限责任公司 | Hole sealing pipe placing device |
| CN207795147U (en) * | 2018-01-20 | 2018-08-31 | 仝耀军 | A kind of layer-through drilling separate type whole process gas drainage hole sealing device |
| WO2019210657A1 (en) * | 2018-05-04 | 2019-11-07 | 中国矿业大学 | Integrated hole sealing device for loose blasting and water injection of underground well deep hole |
| CN110145259A (en) * | 2019-05-31 | 2019-08-20 | 贵州大学 | A kind of automatic continuous drilling machine |
| CN211598741U (en) * | 2019-12-13 | 2020-09-29 | 河南能源化工集团研究总院有限公司 | Device is gone into under hole sealing pipe |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343512A (en) * | 2020-10-30 | 2021-02-09 | 湖南达道新能源开发有限公司 | Auxiliary laying device for laying pipelines in geothermal well |
| CN112343512B (en) * | 2020-10-30 | 2022-12-20 | 邯郸市伟业地热开发有限公司 | Auxiliary laying device for laying pipelines in geothermal well |
| CN114151030A (en) * | 2021-12-02 | 2022-03-08 | 中国煤炭地质总局一一九勘探队 | Hole sealing device applied to geological exploration and use method |
| CN114151030B (en) * | 2021-12-02 | 2024-06-04 | 中国煤炭地质总局一一九勘探队 | Hole sealing device applied to geological exploration and application method |
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| Publication number | Publication date |
|---|---|
| CN110905590B (en) | 2024-08-13 |
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