CN219431808U - Two-plug two-injection real-time pressure-maintaining hole sealing system - Google Patents
Two-plug two-injection real-time pressure-maintaining hole sealing system Download PDFInfo
- Publication number
- CN219431808U CN219431808U CN202223364496.XU CN202223364496U CN219431808U CN 219431808 U CN219431808 U CN 219431808U CN 202223364496 U CN202223364496 U CN 202223364496U CN 219431808 U CN219431808 U CN 219431808U
- Authority
- CN
- China
- Prior art keywords
- grouting
- pipe
- slurry
- hole
- main pipe
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The utility model provides a two stifled two real-time pressurize hole sealing system, including storing up thick liquid device, grouting pump, boost tank and defeated thick liquid are responsible for, the access connection that the storing up thick liquid device downside and defeated thick liquid were responsible for, grouting pump and boost tank are installed in proper order along the liquid flow direction on defeated thick liquid is responsible for, defeated thick liquid is responsible for along tunnel length direction arrangement, is responsible for along length direction on the defeated thick liquid evenly to be equipped with a plurality of connecting pipes, the export of every connecting pipe all is connected with a slip casting and is responsible for, is responsible for along length direction evenly connected with two stifled two notes hole sealing wares of a plurality of on every slip casting; according to the utility model, the hole sealing materials are stirred and manufactured on site, grouting is concentrated, and the grouting pump is cleaned in a concentrated manner after grouting is finished, so that time is saved and labor intensity of workers is reduced. The flexible sealing material with fluidity enables the flexible sealing of the hole packer to be changed along with the change of the drilling hole, when the fracture of the drilling hole expands, a mechanical valve is opened, the flexible sealing material is injected, the fracture is filled, and the drilling hole is always in a pressure maintaining state.
Description
Technical Field
The utility model belongs to the technical field of coal mine gas extraction, and particularly relates to a two-plug two-injection real-time pressure-maintaining hole sealing system.
Background
Underground coal mine gas extraction is a main means for solving the coal mine gas safety problem. After the underground roadway gas extraction drilling construction, the gas extraction is ensured to be carried out smoothly, hole sealing is needed to be carried out immediately, and the traditional hole sealing technology mostly adopts inorganic materials such as cement and the like for hole sealing. After hole sealing of the drilling holes is completed, the solidified hole sealing section can not be kept pressure all the time, and the later period is influenced by roadway deformation, mining to influence the drilling deformation or stress concentration and the like to influence the plugging section to easily cause the cracking to cause the drilling holes to leak gas, so that the pressure is reduced, and the gas concentration is reduced. Some mines are closed and the drilling holes are drilled to treat drilling gas leakage, some mines are directly drilled with the original hole sealing device and the solid hole sealing section along the drilling positions again, and the holes are sealed, so that circulation is achieved, the later gas pumping efficiency and the later gas pumping concentration are directly affected, and a large amount of labor workload and capital investment are increased.
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides a two-plug two-injection real-time pressure-maintaining hole sealing system with high hole sealing efficiency, stable hole sealing pressure and high safety and reliability.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a two stifled two real-time pressurize hole sealing system, including storing up thick liquid device, grouting pump, boost tank and defeated thick liquid are responsible for, the access connection that the storing up thick liquid device downside and defeated thick liquid were responsible for, grouting pump and boost tank are installed in proper order along the liquid flow direction on defeated thick liquid is responsible for, defeated thick liquid is responsible for along tunnel length direction arrangement, is responsible for along length direction on the defeated thick liquid evenly to be equipped with a plurality of connecting pipes, the export of every connecting pipe all is connected with a slip casting and is responsible for, is responsible for along length direction evenly connected with two stifled two notes hole sealing wares of a plurality of on every slip casting;
the two-plug two-injection hole packer is of a two-plug two-injection structure and comprises a first tire bladder, a second tire bladder, a first grouting pipe and a second grouting pipe, wherein a pumping pipe is inserted into a central hole of the first tire bladder and a central hole of the second tire bladder, the direction from a hole opening of a drilled hole to the bottom of the hole is an outward inward direction, the first tire bladder is positioned at the outer side of the second tire bladder, the first grouting pipe sequentially penetrates through the first tire bladder and the second tire bladder from outside to inside, the inner end of the first grouting pipe is plugged, a first grouting hole positioned in the first tire bladder and a second grouting hole positioned in the second tire bladder are formed in the first grouting pipe, an upper port of the second grouting pipe penetrates through the first tire bladder from outside to inside and then stretches into the space between the first tire bladder and the second tire bladder, a first pressure gauge, a first constant pressure valve and a first manual ball valve are arranged on the first grouting pipe, a second pressure gauge, a second constant pressure valve and a first grouting pipe are arranged on the outer side of the first tire bladder, and a first grouting pipe and a second grouting hose are connected with the outer end of the first grouting pipe respectively.
The slurry storage device is a plastic container, flexible hole sealing slurry is contained in the slurry storage device, a hopper is arranged on the left side of the top of the slurry storage device, a stirrer for stirring the flexible hole sealing slurry is arranged on the right side of the slurry storage device, and a connection port of the slurry storage device and a slurry conveying main pipe is positioned on the right side of the lower part of the slurry storage device.
The slurry conveying main pipe is provided with a first mechanical valve positioned between the slurry storage device and the slurry injection pump, the outlet end of the slurry conveying main pipe is provided with a first internal thread plug, and the slurry conveying main pipe is sequentially provided with an electromagnetic pressure limiting valve, a total pressure gauge and a second mechanical valve which are positioned between the pressurizing tank and the connecting pipe adjacent to the pressurizing tank along the liquid flow direction.
A third mechanical valve and a quick pipe joint are sequentially arranged on the connecting pipe along the liquid flow direction; the inlet of the grouting main pipe is connected with the quick pipe joint, the other port of the grouting main pipe is provided with a second internal thread plug, and a third constant pressure valve is arranged on the grouting main pipe at a position adjacent to the quick pipe joint.
The grouting main pipe is L-shaped or semicircular arc-shaped, the L-shaped grouting main pipe is used for bedding drilling in the coal seam roadway, the semicircular arc-shaped grouting main pipe is used for bedding drilling in the bottom pumping roadway, a plurality of hose connecting pipe joints are uniformly arranged on the grouting main pipe, and the hose connecting pipe joints are connected with the outer ports of the first grouting pipe and the second grouting pipe of the two-blocking two-grouting hole packer through grouting hoses.
By adopting the technical scheme, the first tire bladder and the second tire bladder of the two-plug two-injection type hole packer are cylindrical in shape as a whole, and an annular cavity is formed inside the first tire bladder and the second tire bladder.
The slurry storage device is used for storing flexible hole sealing materials, and delivering slurry into the roadway through the slurry injection pump, the pressurizing tank and the slurry delivery main pipe for hole sealing of the drilling holes.
The hopper is used for adding slurry raw materials into the slurry storage device, and the stirrer is used for stirring the slurry in the slurry storage device. The electromagnetic pressure limiting valve is used for limiting the slurry pressure of the main slurry conveying pipe, the total pressure gauge is used for displaying the slurry pressure of the main slurry conveying pipe, and the pressure boosting tank is used for improving the grouting pressure of the main slurry conveying pipe. The first constant pressure valve is used for maintaining the pressure of the slurry in the grouting main pipe. The second constant pressure valve is used for maintaining the pressure inside each hole packer.
The method for carrying out hole sealing construction operation by adopting the utility model comprises the following steps:
(1) Constructing a layer penetrating drilling hole in the coal seam above along different angles in the bottom pumping roadway, or constructing a layer following drilling hole in the coal seam roadway;
(2) Adding a flexible hole sealing material into a grouting device, switching on a power supply by a grouting pump, and conveying the flexible grouting material to various places needing grouting hole sealing through further pressurization of a pressurizing tank under the power action of the grouting pump, wherein a grouting main pipe paved along a roadway wall;
(3) According to the grouping condition of the drilling holes, a grouting main pipe is arranged beside each group of drilling holes, the grouting main pipe is designed to be attached to the roadway wall according to the type of the drilling holes, for example, parallel bedding holes are designed to be parallel to the drilling hole connecting line (L-shaped), the grouting main pipe is fixed at the upper part or the lower part of the drilling hole connecting line of the roadway wall, layer-penetrating drilling holes are designed to be parallel to the top of a bottom suction roadway on one side of the drilling hole connecting line, and hose connecting pipe joints for connecting two plugging two grouting type hole packer grouting pipes are reserved on the grouting main pipe according to requirements. When grouting, the first manual ball valve is opened firstly, flexible hole sealing materials are injected into the first tire bladder and the second tire bladder through the first grouting pipe, under the extrusion of the pressure of the flexible hole sealing materials and the wall of the drilling hole, the two tire bladders prop up the drilling hole and fully contact with the wall of the drilling hole, so that the two ends of the hole packer are plugged, temporary hole sealing is achieved, when grouting pressure in the two tire bladders reaches the preset pressure value of the first constant pressure valve, the second manual ball valve is opened, and flexible hole sealing materials are injected into the middle hole sealing section between the first tire bladder and the second tire bladder through the second grouting pipe until the pressure in the middle hole sealing section reaches the preset pressure value of the second constant pressure valve, and hole sealing operation is completed.
(4) After the hole sealing of the drilling hole is completed, the crack around the drilling hole is increased due to the deformation of the roadway in the later period to generate leakage pressure reduction, the pressure gauge number on the grouting pipe is observed, the gas concentration is reduced, the first mechanical valve, the second mechanical valve and the third mechanical valve on the main grouting pipe are opened, and the flexible hole sealing material is injected into the hole packer for multiple times. And filling the holes in the drill cracks through the fluidity and viscosity of the flexible hole sealing material to prevent the drill from leaking gas, so as to realize flexible pressure-maintaining hole sealing.
In summary, the utility model avoids the complicated processes of conventionally sealing a hole, grouting and sealing a hole, cleaning a one-time grouting pump, stirring and centralized grouting, and cleaning the grouting pump after grouting is finished, thereby saving time and reducing the labor intensity of workers. The flexible sealing material with fluidity enables the flexible sealing of the hole packer to be changed along with the change of the drilling hole, when the fracture of the drilling hole expands, a mechanical valve is opened, the flexible sealing material is injected, the fracture is filled, and the drilling hole is always in a pressure maintaining state.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is an enlarged view of the L-shaped grouting main pipe for the coal seam drilling group in FIG. 1;
FIG. 3 is a schematic view of a semi-circular arc grouting main pipe for hole sealing of a through-layer drilling hole in the utility model;
fig. 4 is a schematic outline view of a two-plug two-injection hole packer in the present utility model;
FIG. 5 is an axial cross-sectional view of a two-plug two-injection packer of the present utility model;
FIG. 6 is a schematic diagram of a two-plug two-injection packer of the present utility model sealing holes in a through-hole borehole;
fig. 7 is a schematic diagram of hole sealing in a bedding borehole by a two-plug two-injection hole packer of the present utility model.
Detailed Description
As shown in fig. 1-7, the two-plug two-injection real-time pressure-maintaining hole sealing system comprises a slurry storage device 1, a slurry injection pump 2, a pressurizing tank 3 and a slurry delivery main pipe 4, wherein the lower side part of the slurry storage device 1 is connected with an inlet of the slurry delivery main pipe 4, the slurry injection pump 2 and the pressurizing tank 3 are sequentially arranged on the slurry delivery main pipe 4 along the liquid flow direction, the slurry delivery main pipe 4 is arranged along the roadway length direction, a plurality of connecting pipes 5 are uniformly arranged on the slurry delivery main pipe 4 along the length direction, the outlet of each connecting pipe 5 is connected with a slurry injection main pipe 6, and a plurality of two-plug two-injection hole sealing devices 7 are uniformly connected on each slurry injection main pipe 6 along the length direction.
The two-plug two-injection hole packer 7 is of a two-plug two-injection structure and comprises a first tire bladder 21, a second tire bladder 22, a first grouting pipe 23 and a second grouting pipe 24, wherein a pumping pipe 25 is inserted into a central hole of the first tire bladder 21 and a central hole of the second tire bladder 22, the direction from a hole opening of a drilled hole to the bottom of the hole is in an outward inward direction, the first tire bladder 21 is positioned at the outer side of the second tire bladder 22, the first grouting pipe 23 sequentially penetrates through the first tire bladder 21 and the second tire bladder 22 from outside to inside, the inner end of the first grouting pipe 23 is plugged, a first grouting hole 27 positioned in the first tire bladder 21 and a second grouting hole 28 positioned in the second tire bladder 22 are arranged on the first grouting pipe 23, the upper port of the second grouting pipe 24 penetrates into the space between the first tire bladder 21 and the second tire bladder 22 from outside to inside after penetrating through the first tire bladder 21, a first pressure gauge 29, a first constant pressure valve 30 and a first ball valve 42 are arranged on the outer side of the first grouting pipe 23, a first constant pressure gauge 32 and a second constant pressure valve 42 are arranged on the outer side of the first tire bladder 21, a first constant pressure valve 32 is arranged on the first grouting pipe 24, and a second constant pressure valve 32 is arranged on the first grouting pipe 24 respectively, and the outer side of the first constant pressure valve 32 is connected with the first constant pressure valve 32.
The slurry storage device 1 is a plastic container, flexible hole sealing slurry is contained in the slurry storage device 1, a hopper 8 is arranged on the left side of the top of the slurry storage device 1, a stirrer 9 for stirring the flexible hole sealing slurry is arranged on the right side of the slurry storage device 1, and a connection port of the slurry storage device 1 and the slurry conveying main pipe 4 is positioned on the right side of the lower portion of the slurry storage device 1.
The main slurry conveying pipe 4 is provided with a first mechanical valve 10 positioned between the slurry storage device 1 and the slurry injection pump 2, the outlet end of the main slurry conveying pipe 4 is provided with a first internal thread plug 11, and the main slurry conveying pipe 4 is sequentially provided with an electromagnetic pressure limiting valve 12, a total pressure gauge 13 and a second mechanical valve 14 positioned between the pressurizing tank 3 and the connecting pipe 5 adjacent to the pressurizing tank 3 along the liquid flow direction.
A third mechanical valve 15 and a quick pipe joint 16 are sequentially arranged on the connecting pipe 5 along the liquid flow direction; the inlet of the main grouting pipe 6 is connected with the quick pipe joint 16, the other port of the main grouting pipe 6 is provided with a second internal thread plug 17, and a third constant pressure valve 18 is arranged on the main grouting pipe 6 at the position adjacent to the quick pipe joint 16.
The grouting main pipe 6 is L-shaped or semicircular arc-shaped, the L-shaped grouting main pipe 6 is used for a bedding drilling hole 26 in the coal seam roadway, the semicircular arc-shaped grouting main pipe 6 is used for a bedding drilling hole 40 in the bottom pumping roadway, a plurality of hose connecting pipe joints 19 are uniformly arranged on the grouting main pipe 6, and the hose connecting pipe joints 19 are connected with the outer ports of the first grouting pipe 23 and the second grouting pipe 24 of the two-plug two-injection hole packer 7 through grouting hoses 20.
The method for carrying out hole sealing construction operation by adopting the utility model comprises the following steps:
(1) Constructing a layer penetrating drilling hole 26 in the coal seam above along different angles in the bottom-drawing roadway, or constructing a layer following drilling hole 40 in the coal seam roadway;
(2) Adding a flexible hole sealing material into the grouting device 1, switching on a power supply of the grouting pump 2, and further pressurizing the flexible grouting material through a pressurizing tank 3 under the power action of the grouting pump 2, and conveying the grouting material to various places needing grouting hole sealing along a grouting main pipe 6 paved on the roadway wall;
(3) According to the grouping condition of the drilling holes, a grouting main pipe 6 is arranged beside each group of drilling holes, the grouting main pipe 6 is designed to be attached to the roadway wall according to the type of the drilling holes, for example, parallel bedding holes are designed to be parallel to the drilling hole connecting line (L-shaped), the grouting main pipe is fixed at the upper part or the lower part of the drilling hole connecting line of the roadway wall, the layer-penetrating drilling holes 26 are designed to be parallel to the top of a bottom pumping roadway on one side of the drilling hole connecting line, and a hose connecting pipe joint 19 for connecting two grouting pipes of the two-blocking two-injection hole packer 7 is reserved on the grouting main pipe 6 according to the requirement. When grouting, first manual ball valve 42 is opened, flexible hole sealing materials are injected into first tyre bag 21 and second tyre bag 22 through first grouting pipe 23, under the extrusion of flexible hole sealing materials and borehole wall, two tyre bags prop up the borehole and fully contact with the borehole wall, so that the two ends of the hole packer are plugged to seal the borehole temporarily, when grouting pressure in the two tyre bags reaches the preset pressure value of second constant pressure valve 30, second manual ball valve 43 is opened, flexible hole sealing materials are injected into the middle hole sealing section between first tyre bag 21 and second tyre bag 22 through second grouting pipe 24, and hole sealing operation is completed until the pressure in the middle hole sealing section reaches the preset pressure value of third constant pressure valve 32.
(4) After the hole sealing of the drilling hole is completed, the crack around the drilling hole is increased due to the deformation of the roadway in the later period, so that the leakage pressure is reduced, the pressure gauge number on the grouting pipe is observed, the gas concentration is reduced, the first mechanical valve 10, the second mechanical valve 14 and the third mechanical valve 15 on the main grouting pipe 4 are opened, and the flexible hole sealing material is injected into the hole packer for multiple times. And filling the holes in the drill cracks through the fluidity and viscosity of the flexible hole sealing material to prevent the drill from leaking gas, so as to realize flexible pressure-maintaining hole sealing.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present utility model, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model are all included in the scope of protection of the technical solution of the present utility model.
Claims (5)
1. A two-plug two-injection real-time pressure-maintaining hole sealing system is characterized in that: the device comprises a slurry storage device, a slurry injection pump, a pressurizing tank and a slurry delivery main pipe, wherein the lower side part of the slurry storage device is connected with an inlet of the slurry delivery main pipe, the slurry injection pump and the pressurizing tank are sequentially arranged on the slurry delivery main pipe along the liquid flow direction, the slurry delivery main pipe is arranged along the length direction of a roadway, a plurality of connecting pipes are uniformly arranged on the slurry delivery main pipe along the length direction, the outlet of each connecting pipe is connected with one slurry injection main pipe, and a plurality of two-blocking two-injection hole sealing devices are uniformly connected on each slurry injection main pipe along the length direction;
the two-plug two-injection hole packer is of a two-plug two-injection structure and comprises a first tire bladder, a second tire bladder, a first grouting pipe and a second grouting pipe, wherein a pumping pipe is inserted into a central hole of the first tire bladder and a central hole of the second tire bladder, the direction from a hole opening of a drilled hole to the bottom of the hole is an outward inward direction, the first tire bladder is positioned at the outer side of the second tire bladder, the first grouting pipe sequentially penetrates through the first tire bladder and the second tire bladder from outside to inside, the inner end of the first grouting pipe is plugged, a first grouting hole positioned in the first tire bladder and a second grouting hole positioned in the second tire bladder are formed in the first grouting pipe, an upper port of the second grouting pipe penetrates through the first tire bladder from outside to inside and then stretches into the space between the first tire bladder and the second tire bladder, a first pressure gauge, a first constant pressure valve and a first manual ball valve are arranged on the first grouting pipe, a second pressure gauge, a second constant pressure valve and a first grouting pipe are arranged on the outer side of the first tire bladder, and a first grouting pipe and a second grouting hose are connected with the outer end of the first grouting pipe respectively.
2. The two-plug two-injection real-time pressure-maintaining hole sealing system according to claim 1, wherein: the slurry storage device is a plastic container, flexible hole sealing slurry is contained in the slurry storage device, a hopper is arranged on the left side of the top of the slurry storage device, a stirrer for stirring the flexible hole sealing slurry is arranged on the right side of the slurry storage device, and a connection port of the slurry storage device and a slurry conveying main pipe is positioned on the right side of the lower part of the slurry storage device.
3. The two-plug two-injection real-time pressure-maintaining hole sealing system according to claim 2, wherein: the slurry conveying main pipe is provided with a first mechanical valve positioned between the slurry storage device and the slurry injection pump, the outlet end of the slurry conveying main pipe is provided with a first internal thread plug, and the slurry conveying main pipe is sequentially provided with an electromagnetic pressure limiting valve, a total pressure gauge and a second mechanical valve which are positioned between the pressurizing tank and the connecting pipe adjacent to the pressurizing tank along the liquid flow direction.
4. The two-plug two-injection real-time pressure-maintaining hole sealing system according to claim 3, wherein: a third mechanical valve and a quick pipe joint are sequentially arranged on the connecting pipe along the liquid flow direction; the inlet of the grouting main pipe is connected with the quick pipe joint, the other port of the grouting main pipe is provided with a second internal thread plug, and a third constant pressure valve is arranged on the grouting main pipe at a position adjacent to the quick pipe joint.
5. The two-plug two-injection real-time pressure-maintaining hole sealing system according to claim 4, wherein: the grouting main pipe is L-shaped or semicircular arc-shaped, the L-shaped grouting main pipe is used for bedding drilling in the coal seam roadway, the semicircular arc-shaped grouting main pipe is used for bedding drilling in the bottom pumping roadway, a plurality of hose connecting pipe joints are uniformly arranged on the grouting main pipe, and the hose connecting pipe joints are connected with the outer ports of the first grouting pipe and the second grouting pipe of the two-blocking two-grouting hole packer through grouting hoses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223364496.XU CN219431808U (en) | 2022-12-15 | 2022-12-15 | Two-plug two-injection real-time pressure-maintaining hole sealing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223364496.XU CN219431808U (en) | 2022-12-15 | 2022-12-15 | Two-plug two-injection real-time pressure-maintaining hole sealing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219431808U true CN219431808U (en) | 2023-07-28 |
Family
ID=87344678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223364496.XU Active CN219431808U (en) | 2022-12-15 | 2022-12-15 | Two-plug two-injection real-time pressure-maintaining hole sealing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219431808U (en) |
-
2022
- 2022-12-15 CN CN202223364496.XU patent/CN219431808U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109736767B (en) | Supercritical carbon dioxide fracturing production increasing process | |
| WO2023227051A1 (en) | Mine underground fracturing and proppant injection integrated apparatus and construction method | |
| CN102561992B (en) | Grouting plugging process adopting deformation water stopper | |
| CN113250670B (en) | Single-hole multi-section synchronous control fracturing coal body permeability increasing system and method | |
| CN109488250A (en) | Hole sealing device and method can be recycled in a kind of coal bed gas extraction drilling mucus dynamic | |
| CN107387035A (en) | Gas injection High Pressure Drain system in a kind of well | |
| CN111927528A (en) | Self-adaptive dynamic hole sealing system and hole sealing method thereof | |
| CN204571919U (en) | Drilling and hole sealing device for coal mine downward coal bed gas pressure measurement | |
| CN103470212A (en) | Active drilling and hole sealing device and method | |
| CN207161064U (en) | A kind of long-acting layered water filler of binary channels with one heart | |
| CN205330611U (en) | Mining hole packer | |
| CN219431808U (en) | Two-plug two-injection real-time pressure-maintaining hole sealing system | |
| CN114320206A (en) | Mining gas drainage hole sealing system | |
| CN219119213U (en) | Two stifled notes flexible pressurize intelligence hole sealing system | |
| CN112922561A (en) | Gas extraction drilling hole sealing method for underground bottom suction roadway of coal mine | |
| CN104695920A (en) | Foaming agent injection system for oil field | |
| CN116146143A (en) | Flexible pressure-maintaining intelligent hole sealing system for underground coal mine drilling extraction | |
| CN116044341A (en) | Two-blocking two-injection real-time pressure-maintaining hole sealing construction process | |
| CN115929250A (en) | Flexible pressure-maintaining two-plugging one-injection hole sealing construction method | |
| CN211777368U (en) | Hydraulic sand fracturing system | |
| CN104234217A (en) | Light pressure grouting device and grouting construction method thereof | |
| CN204040219U (en) | Light-duty pressure grouting device for overall | |
| CN106677740A (en) | Underground coal mine one-section type water sealing device and sealing method thereof | |
| CN102926697B (en) | Port closing device, gas drainage system and port closing method | |
| CN202866732U (en) | Hole opening plugging device and gas extraction system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |