CN110424918A - A kind of high pressure borehole sealing device and application method - Google Patents
A kind of high pressure borehole sealing device and application method Download PDFInfo
- Publication number
- CN110424918A CN110424918A CN201910704556.1A CN201910704556A CN110424918A CN 110424918 A CN110424918 A CN 110424918A CN 201910704556 A CN201910704556 A CN 201910704556A CN 110424918 A CN110424918 A CN 110424918A
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- Prior art keywords
- steel pipe
- steel plate
- section
- release
- seal section
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- 238000007789 sealing Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 126
- 239000010959 steel Substances 0.000 claims description 126
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/064—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers specially adapted for underwater well heads
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
- E21B34/04—Valve arrangements for boreholes or wells in well heads in underwater well heads
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of high pressure borehole sealing device and application methods, characterized by comprising: release section, seal section and seal section fastening assembly；When use, drilling rod is passed through into seal section, drill bit is installed in drill rod end, adjust drilling machine position, keep drilling rod direction consistent with the direction of inbuilt aperture section, drill bit is hidden in release section, release section and seal section are connected by the first connection bolt and the first attaching nut, open the ball valve in inbuilt aperture section, start drilling construction, the release ball valve that release section is opened in boring procedure carries out deslagging and release, if sealing device unloads leakage, can block leakage by tightening tightened bolt presses rubber seal.It is the configuration of the present invention is simple, easy to use, easy to spread, it can effectively prevent aperture when drilling under high pressure operating condition and a large amount of leaks occur and gush.
Description
Technical field
The invention belongs to earth drillings and grouting technique field, and in particular to a kind of high pressure borehole sealing device and user
Method.
Background technique
With the development of national economic construction and the development and utilization to the underground space, a large amount of electric power, subway, highway, water
The tunnels such as work need to build at river bottom or seabed, since river bottom or the seabed engineering hydrology and engineering geological condition are complicated and changeable, apply
Advance geologic benefit is inevitably carried out during work may drill and advanced hole and grouting and reinforcing, can thus be related in Gao Shui
Depress the drilling construction under complicated geological environment.Since in river bottom or subsea borehole, hydraulic pressure is big, in boring procedure inevitably
Aperture water spray or water burst can occur, to bring security risk.Therefore sealing device is added in aperture in boring procedure, prevented
Occur a large amount of leaks in boring procedure and gush, there is particularly important realistic meaning and value.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficiency of the prior art, providing a kind of structure letter
It is single, easy to use, easy to spread, a large amount of leaks in boring procedure can be prevented and gush and conveniently realize boring procedure
In deslagging and release high pressure borehole sealing device and application method.
In order to solve the above technical problems, the invention is realized by the following technical scheme:
A kind of high pressure borehole sealing device, characterized by comprising: the first steel pipe, first flange disk, second flange disk, the second steel
Pipe, release ball valve, matching used first connection bolt and the first attaching nut, third steel pipe, third ring flange, the first steel plate
Annulus, the rubber gasket of annular, fastening nut, the second steel plate annulus, middle part are equipped with there are two an aperture and two sides set
The steel plate strip of circular hole, fastening bolt matched with fastening nut and second connect bolt；
The model of three ring flanges is consistent, and the internal diameter of ring flange is identical as the outer diameter of the first steel pipe and third steel pipe；In the first steel
The side of pipe is equipped with a diameter and the consistent circular hole of the second pipe diameter, release ball valve are matched with the size of the second steel pipe；
The internal-and external diameter of first steel plate annulus, rubber gasket and the second steel plate annulus is identical, and internal diameter is slightly larger than the drilling rod of drilling device
With the outer diameter of drill bit, outer diameter is consistent with the internal diameter of third steel pipe, the thickness of the first steel plate annulus and the length of rubber gasket
The sum of be slightly less than the length of third steel pipe；Bore size in the middle part of steel plate strip is greater than the internal diameter of rubber gasket, two sides
Bore inner diameter is identical as the internal diameter of fastening nut, two center of circular hole spacing and two fastening nuts being welded on third steel pipe
Center spacing is consistent；The length of fastening bolt is greater than the sum of the second steel plate annulus thickness and steel plate strip thickness；
First flange disk and second flange disk are respectively welded at the both ends of the first steel pipe, and one end of the second steel pipe is welded on the first steel
Circular on pipe, the outer surface thread of the other end form screw thread and connect with release ball valve, form release section；
Third ring flange and the first steel plate annulus are respectively welded at the interior outside of third steel pipe the same end, and fastening nut is welded on
The outside of the three steel pipe other ends, rubber gasket are inserted into the inside of third steel pipe, form seal section；
Seal section fastening assembly is formed after circular hole in the middle part of second steel plate annulus and the aperture alignment contact in the middle part of steel plate strip；
Release section and seal section are connected second flange disk with third ring flange by the first connection bolt and the first attaching nut
To complete assembling；Seal section is connected to complete to assemble, after assembling by fastening bolt with fastening nut with seal section fastening assembly
One end of rubber gasket and the second steel plate annulus is caught in third steel pipe, and the other end and steel plate strip of the second steel plate annulus are straight
Contact.
Preferably, a kind of high pressure borehole sealing device, the first flange disk and second flange disk with
The connection type and third ring flange at the first steel pipe both ends and the connection type of third steel pipe are to be threadedly coupled.
A kind of application method of high pressure borehole sealing device, it is characterised in that the following steps are included:
Step 1: being bolted inbuilt aperture section and release section by the second connection；
Step 2: the second steel plate annulus is caught in the third steel duct of seal section, on the outside of rubber gasket, then by steel plate strip
Circular hole and the second steel plate annulus of compression in the middle part of the aperture alignment rubber gasket at middle part, are then inserted into steel plate for fastening bolt
It in two mother rib lateral rotundums of item, and is screwed into the fastening nut on seal section, seal section is completed；
Step 3: drilling rod is passed through seal section, drill bit is installed in drill rod end；
Step 4: adjustment drilling machine position, it is consistent with inbuilt aperture section direction to make drilling rod direction, and drill bit is hidden into release section
It is interior；
Step 5: release section and seal section are connected by the first connection bolt and the first attaching nut；
Step 6: the ball valve in inbuilt aperture section is opened, drilling construction is started；
Step 7: the release ball valve that release section is opened in boring procedure carries out deslagging and release；
Step 8: in boring procedure, leakage is blocked by tightening tightened bolt presses rubber seal.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is mainly made of release section, seal section and seal section fastening assembly, in use process, by opening release section
On ball valve, the deslagging and release that can be very easy to may be implemented in boring procedure can to prevent sealing device from unloading leakage
By tighten tightened bolt presses rubber seal block leakage, a large amount of leaks in boring procedure can be prevented and gush and
Conveniently realize the deslagging in boring procedure and release.
2, the present invention is only made of release section, seal section and seal section fastening assembly and simple screw bolt and nut, structure
Simply very simple, disassembly, installation and use are very convenient, and associated materials and piece price are cheap, are easy to get, because
And it is very easy to promote the use of.
Detailed description of the invention
Content expressed by this specification attached drawing and the label in figure are briefly described below:
Fig. 1 is high pressure borehole sealing device sectional view.
Fig. 2 is that high pressure borehole sealing device installs and uses status diagram.
Fig. 3 is high pressure borehole sealing device composed structure schematic diagram.
Fig. 4 is high pressure borehole sealing device release section front view.
Fig. 5 is high pressure borehole sealing device release section left view.
Fig. 6 is high pressure borehole sealing device seal section front view.
Fig. 7 is high pressure borehole sealing device seal section left view.
Fig. 8 is high pressure borehole sealing device seal section right view.
Fig. 9 is high pressure borehole sealing device seal section fastening assembly front view.
Figure 10 is high pressure borehole sealing device seal section fastening assembly left view.
Figure 11 is high pressure borehole sealing device seal section fastening assembly right view.
In figure, the 1-the first steel pipe, 2-first flange disks, 3-second flange disks, the 4-the second steel pipe, 5-release ball valves,
6-the first connection bolt, the 7-the first attaching nut, 8-third steel pipes, 9-third ring flanges, the 10-the first steel plate annulus,
11-rubber gaskets, 12-fastening nuts, the 13-the second steel plate annulus, 14-steel plate strips, 15-fastening bolts, 16-the
Two connection bolts.
Specific embodiment
Below against attached drawing, by embodiment, the present invention is described in further detail, to help those skilled in the art
Member has more complete, accurate and deep understanding to inventive concept of the invention, technical solution.
Embodiment 1
As shown in Figure 1, a kind of high pressure borehole sealing device, it is characterised in that including the first steel pipe 1, first flange disk 2, the second method
Blue disk 3, the second steel pipe 4, release ball valve 5, matching used first connection bolt 6 and the first attaching nut 7, third steel pipe 8, the
Three ring flanges 9, the first steel plate annulus 10, the rubber gasket 11 of annular, fastening nut 12, the second steel plate annulus 13, middle part
The steel plate strip 14, fastening bolt 15 matched with fastening nut 12 and of an aperture and two threaded holes are respectively equipped with two sides
Two connection bolts 16；
First steel pipe 1, third steel pipe 8 are DN100 steel pipe；Three ring flanges 2,3,9 are DN100 ring flange, and thickness is successively
For 18mm, 12mm, 12mm；It is equipped with the circular hole of a diameter 50mm on the side of the first steel pipe 1, the second steel pipe 4 and unloads pressure ball
Valve 5 is respectively DN50mm steel pipe and DN50mm ball valve；First steel plate annulus 10, rubber gasket 11, the second steel plate annulus 13
Internal diameter be 46mm, outer diameter is consistent with the internal diameter of DN100 steel pipe, and the drilling rod of drilling device and the outer diameter of drill bit are slightly less than
46mm；First steel plate annulus 10 with a thickness of 5mm, the length of rubber gasket 11 is 120mm, and the length of third steel pipe 8 is
135mm；Length, the width and thickness of steel plate strip 14 are respectively 190mm, 50mm and 10mm, in the middle part of aperture be 70 × 50mm
Rectangle, the internal diameter of two mother rib lateral rotundums is identical as the internal diameter of fastening nut 12, the center spacing of two threaded holes and is welded on the
The center spacing of two fastening nuts 12 on three steel pipes 8 is consistent, the second steel plate annulus 13 with a thickness of 37mm；First connection spiral shell
Bolt 6 is the M16 bolt that length is not less than 40mm, and the first attaching nut 7 is M16 nut；Fastening nut 12 is M16 nut, fastening
Bolt 15 is the M16 bolt of length 80mm；
First flange disk 2 and second flange disk 3 are respectively welded at the both ends of the first steel pipe 1, and one end of the second steel pipe 4 is welded on
Circular on one steel pipe 1, the outer surface thread of the other end form screw thread and connect with release ball valve 5, form the institute of Fig. 4~5
The release section shown；
Third ring flange 9 and the first steel plate annulus 10 are respectively welded at the interior outside of 8 the same end of third steel pipe, and fastening nut 12 welds
It connects in the outside of 8 other end of third steel pipe, rubber gasket 11 is inserted into the inside of third steel pipe 8, forms shown in Fig. 6~8
Seal section；
Seal section shown in aperture alignment composition Fig. 9~11 at 14 middle part of circular hole and steel plate strip at 13 middle part of the second steel plate annulus is tight
Gu component；
Release section and seal section pass through the first connection bolt 6 and the first attaching nut 7 for second flange disk 3 and third ring flange 9
Connection is to complete to assemble；Seal section and seal section fastening assembly are connected by fastening bolt 15 and fastening nut 12 to complete group
Dress, one end of rubber gasket 11 and the second steel plate annulus 13 is caught in third steel pipe 8 after assembling, the second steel plate annulus 13
The other end is directly contacted with steel plate strip 14, and the high pressure borehole sealing apparatus structure schematic diagram after assembling is as shown in Figure 3.
A kind of application method of high pressure borehole sealing device, specifically includes the following steps:
Step 1: connecting inbuilt aperture section and release section by the second connection bolt 16；
Step 2: the second steel plate annulus 13 is caught in inside the third steel pipe 8 of seal section, the right side of rubber gasket 11, then
By the circular hole at 11 middle part of aperture alignment rubber gasket at 14 middle part of steel plate strip and the second steel plate annulus 13 is compressed, it then will be tight
Fixing bolt 15 is inserted into the threaded hole of steel plate strip 14 and is screwed into the fastening nut on seal section, and seal section is completed；
Step 3: drilling rod is passed through seal section, drill bit is installed in drill rod end；
Step 4: adjustment drilling machine position, it is consistent with inbuilt aperture section direction to make drilling rod direction, and drill bit is hidden into release section
It is interior；
Step 5: release section and seal section are connected by the first connection bolt 6 and the first attaching nut 7, as shown in Figure 1；
Step 6: the ball valve in inbuilt aperture section is opened, drilling construction is started；
Step 7: the release ball valve 5 that release section is opened in boring procedure carries out deslagging and release；
Step 8: such as sealing device unloads leakage in boring procedure, can compress rubber seal 11 by tightening fastening bolt 15
Block leakage.
Embodiment 2
Embodiment 1 is repeated, but has following difference, a kind of high pressure borehole sealing device, the first flange disk 2 and second flange disk
3 with the connection type of the connection type at 1 both ends of the first steel pipe and third ring flange 9 and third steel pipe 8 be to be threadedly coupled.
Embodiment described above is only presently preferred embodiments of the present invention, is not intended to limit the invention, all of the invention
Made any modification and equivalent replacement within principle and design principle, should be included in the scope of protection of present invention it
It is interior.
Claims (3)
1. a kind of high pressure borehole sealing device, characterized by comprising: the first steel pipe (1), first flange disk (2), second flange
Disk (3), the second steel pipe (4), release ball valve (5), matching used first connection bolt (6) and the first attaching nut (7), third
Steel pipe (8), third ring flange (9), the first steel plate annulus (10), the rubber gasket (11) of annular, fastening nut (12), the
Two steel plate annulus (13), middle part are equipped with an aperture and two sides set and match there are two the steel plate strip 14 of circular hole, with fastening nut (12)
The fastening bolt (15) of set and the second connection bolt (16)；
The model of three ring flanges (2,3,9) is consistent, the internal diameter and the first steel pipe (1) and third steel pipe (8) of ring flange (2,3,9)
Outer diameter it is identical；A diameter and the consistent circular hole of the second steel pipe (4) internal diameter, release are equipped on the side of the first steel pipe (1)
Ball valve (5) is matched with the size of the second steel pipe (4)；First steel plate annulus (10), rubber gasket (11) and the second steel plate circle
The internal-and external diameter of ring (13) is identical, and for internal diameter slightly larger than the drilling rod of drilling device and the outer diameter of drill bit, outer diameter is interior with third steel pipe (8)
Diameter is consistent, and the thickness of the first steel plate annulus (10) and the sum of the length of rubber gasket (11) are slightly less than third steel pipe (8)
Length；Bore size in the middle part of steel plate strip (14) is greater than the internal diameter of rubber gasket (11), the bore inner diameter of two sides and tight
Gu the internal diameter of nut (12) is identical, two center of circular hole spacing and two fastening nuts (12) being welded on third steel pipe (8)
Center spacing is consistent；The length of fastening bolt (15) is greater than the sum of the second steel plate annulus (13) thickness and steel plate strip (14) thickness；
First flange disk (2) and second flange disk (3) are respectively welded at the both ends of the first steel pipe (1), one end of the second steel pipe (4)
The circular being welded on the first steel pipe (1), the outer surface thread of the other end of the second steel pipe (4) form screw thread and and release
Ball valve (5) connection, forms release section；
Third ring flange (9) and the first steel plate annulus (10) are respectively welded at the interior outside of third steel pipe (8) the same end, fasten spiral shell
Female (12) are welded on the outside of third steel pipe (8) other end, and rubber gasket (11) is inserted into the inside of third steel pipe (8), group
At seal section；
Composition seal section fastening after aperture alignment contact in the middle part of circular hole and steel plate strip (14) in the middle part of second steel plate annulus (13)
Component；
Release section and seal section pass through the first connection bolt (6) and the first attaching nut (7) for second flange disk (3) and third method
Blue disk (9) connection is to complete to assemble；Seal section and seal section fastening assembly are connected by fastening bolt (15) and fastening nut (12)
It connecing to complete to assemble, one end of rubber gasket (11) and the second steel plate annulus (13) is caught in third steel pipe (8) after assembling,
The other end of second steel plate annulus (13) is directly contacted with steel plate strip (14).
2. a kind of high pressure borehole sealing device according to claim 1, it is characterised in that: the first flange disk (2) and
Second flange disk (3) and the connection type at the first steel pipe (1) both ends and the connection of third ring flange (9) and third steel pipe (8)
Mode is to be threadedly coupled.
3. a kind of application method of high pressure borehole sealing device according to claim 1 or 2, it is characterised in that including following
Step:
Step 1: connecting inbuilt aperture section and release section by the second connection bolt (16)；
Step 2: third steel pipe (8) inside that the second steel plate annulus (13) is caught in seal section, rubber gasket (11) are outside
Side, then by the circular hole in the middle part of aperture alignment rubber gasket (11) in the middle part of steel plate strip (14) and compress the second steel plate annulus
(13), then fastening bolt (15) are inserted into two mother rib lateral rotundums of steel plate strip (14), and are screwed into the fastening nut on seal section
(12) in, seal section is completed；
Step 3: drilling rod is passed through seal section, drill bit is installed in drill rod end；
Step 4: adjustment drilling machine position, it is consistent with inbuilt aperture section direction to make drilling rod direction, and drill bit is hidden into release section
It is interior；
Step 5: release section and seal section are connected by the first connection bolt (6) and the first attaching nut (7)；
Step 6: the ball valve in inbuilt aperture section is opened, drilling construction is started；
Step 7: the release ball valve (5) that release section is opened in boring procedure carries out deslagging and release；
Step 8: in boring procedure, rubber seal (11) closure leakage is compressed by tightening fastening bolt (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910704556.1A CN110424918A (en) | 2019-07-31 | 2019-07-31 | A kind of high pressure borehole sealing device and application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910704556.1A CN110424918A (en) | 2019-07-31 | 2019-07-31 | A kind of high pressure borehole sealing device and application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110424918A true CN110424918A (en) | 2019-11-08 |
Family
ID=68413603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910704556.1A Pending CN110424918A (en) | 2019-07-31 | 2019-07-31 | A kind of high pressure borehole sealing device and application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110424918A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952953A (en) * | 2020-01-15 | 2020-04-03 | 安徽建筑大学 | Pressure-maintaining plugging device for horizontal directional drilling hole and water burst treatment method using same |
| CN112796699A (en) * | 2020-12-29 | 2021-05-14 | 中煤隧道工程有限公司 | High-pressure blowout preventer with emergency plugging cabin and installation and use methods |
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| CN201833021U (en) * | 2010-03-23 | 2011-05-18 | 永煤集团股份有限公司新桥煤矿 | Pressure tapper |
| CN203626702U (en) * | 2013-12-27 | 2014-06-04 | 邢台市中煤矿山器材有限公司 | Drilling orifice blowout prevention device |
| CN204609814U (en) * | 2015-05-12 | 2015-09-02 | 安徽理工大学 | A kind of deep thick alluvium bored shaft broken grouting orifice tube is anti-goes out device |
| CN206129216U (en) * | 2016-10-31 | 2017-04-26 | 河北钢铁集团矿业有限公司 | Drilling blowout preventer regulatees watercourses in underground mine |
| CN108193688A (en) * | 2017-12-12 | 2018-06-22 | 上海市基础工程集团有限公司 | The orifice sealing device device and method of horizontal comprehensive superhigh pressure jetting slip casting method |
| CN211314150U (en) * | 2019-07-31 | 2020-08-21 | 中国水利水电第十四工程局有限公司 | High-pressure drilling sealing device |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201833021U (en) * | 2010-03-23 | 2011-05-18 | 永煤集团股份有限公司新桥煤矿 | Pressure tapper |
| CN203626702U (en) * | 2013-12-27 | 2014-06-04 | 邢台市中煤矿山器材有限公司 | Drilling orifice blowout prevention device |
| CN204609814U (en) * | 2015-05-12 | 2015-09-02 | 安徽理工大学 | A kind of deep thick alluvium bored shaft broken grouting orifice tube is anti-goes out device |
| CN206129216U (en) * | 2016-10-31 | 2017-04-26 | 河北钢铁集团矿业有限公司 | Drilling blowout preventer regulatees watercourses in underground mine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952953A (en) * | 2020-01-15 | 2020-04-03 | 安徽建筑大学 | Pressure-maintaining plugging device for horizontal directional drilling hole and water burst treatment method using same |
| CN110952953B (en) * | 2020-01-15 | 2024-03-19 | 安徽建筑大学 | Pressure-maintaining plugging device for horizontal directional drill hole and water gushing treatment method using same |
| CN112796699A (en) * | 2020-12-29 | 2021-05-14 | 中煤隧道工程有限公司 | High-pressure blowout preventer with emergency plugging cabin and installation and use methods |
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