CN117803345A - Coal seam drilling orifice blowout preventer - Google Patents
Coal seam drilling orifice blowout preventer Download PDFInfo
- Publication number
- CN117803345A CN117803345A CN202410023922.8A CN202410023922A CN117803345A CN 117803345 A CN117803345 A CN 117803345A CN 202410023922 A CN202410023922 A CN 202410023922A CN 117803345 A CN117803345 A CN 117803345A
- Authority
- CN
- China
- Prior art keywords
- gas
- blowout preventer
- coal seam
- cover
- orifice
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 39
- 239000003245 coal Substances 0.000 title claims abstract description 24
- 238000012856 packing Methods 0.000 claims abstract description 34
- 230000002265 prevention Effects 0.000 claims abstract description 15
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 8
- 230000010354 integration Effects 0.000 claims description 26
- 239000002817 coal dust Substances 0.000 claims description 20
- 239000012528 membrane Substances 0.000 claims description 16
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 description 8
- 208000028659 discharge Diseases 0.000 description 7
- 239000000428 dust Substances 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000701 coagulant Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 206010035148 Plague Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011405 expansive cement Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material 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
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- 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
Landscapes
- 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)
- Tents Or Canopies (AREA)
Abstract
The invention relates to the technical field of coal seam drilling blowout prevention, in particular to a coal seam drilling orifice blowout prevention device. The invention provides the coal seam drilling orifice blowout preventer, which can increase the connection tightness degree between the orifice blowout preventer and the orifice, and improve the stability of the orifice blowout preventer and the gas blowout prevention safety. The utility model provides a coal seam drilling drill way blowout preventer, includes apron, gas collecting channel, seals and separates mechanism and blowout prevention mechanism, the apron top is connected with the gas collecting channel, the apron bottom is equipped with and seals the drilling drill way seal and separate the mechanism, apron rear portion upside is equipped with prevents the gas blowout well prevent spouting the mechanism. According to the invention, the air is injected into the expansion bag through the air pump, the expansion bag expands to deform the lower part of the packing tube, so that the stabilizing plate is promoted to be contacted with the wall of the drilling hole, the stability and the tightness of the packing tube are improved, the effect of increasing the connection tightness degree between the orifice blowout preventer and the orifice and improving the stability of the orifice blowout preventer and the gas blowout preventer can be achieved.
Description
Technical Field
The invention relates to the technical field of coal seam drilling blowout prevention, in particular to a coal seam drilling orifice blowout prevention device.
Background
The drilling hole is used for continuously spraying a large amount of coal dust and gas from the drilling hole in a short time due to vibration action during drilling construction or due to instability of coal around the drilling hole during or after the drilling hole is constructed. The phenomenon of drilling holes can be considered as small coal and gas outburst occurring during drilling construction. In the construction process of penetrating and drilling the protruding coal seam, especially the soft high-ground stress protruding coal seam, the phenomenon of spraying holes from the drilling holes tends to occur easily. The gas sprayed out is dissipated into the roadway, so that the gas is easy to overrun, potential safety hazards are generated, the sprayed coal cinder not only pollutes the roadway environment, but also is extremely easy to damage personnel and equipment, and the danger of drilling construction operation is increased.
The jet hole phenomenon is always a great difficulty which plagues the safe and efficient operation of hydraulic punching. In the conventional work, the orifice blowout preventer is generally reinforced with a setting agent such as expansive cement. However, the method has long operation time and low safety, and in the punching operation process, the drill rod is extremely easy to damage orifice coagulants, so that the blowout preventer is loosened and falls off, and when a spray orifice occurs, great potential safety hazards are generated.
Thus, a coal seam drilling hole blowout preventer has now been developed that can increase the tightness of the connection between the hole blowout preventer and the hole, improving the stability of the hole blowout preventer and the safety of gas blowout prevention.
Disclosure of Invention
In order to overcome the defect that in the punching operation process, a drill rod is extremely easy to damage an orifice coagulant, so that a blowout preventer is loosened and falls off, and a great potential safety hazard is generated when a spray orifice occurs, the invention provides the coal seam drilling orifice blowout preventer which can increase the connection tightness degree between the orifice blowout preventer and an orifice and improve the stability of the orifice blowout preventer and the blowout preventer safety of gas.
The technical implementation scheme of the invention is as follows: the utility model provides a coal seam drilling drill way blowout preventer, includes apron, gas collecting channel, seals and separates mechanism and blowout prevention mechanism, the apron top is connected with the gas collecting channel, the apron bottom is equipped with and seals the drilling drill way seal and separate the mechanism, apron rear portion upside is equipped with prevents the gas blowout well prevent spouting the mechanism.
Optionally, the packing mechanism is including packing pipe, firm board, expansion bag and air pump, the apron bottom is connected with the packing pipe, the packing pipe lower part outside is connected with firm board, the packing pipe lower part inboard is connected with the expansion bag, apron front portion upside is connected with the air pump, the air pump with connect through the pipe between the expansion bag, the packing pipe penetrates in the change pore opening and starts the air pump, the air pump to the gas injection in the expansion bag, the expansion bag inflation makes packing pipe lower part deformation promotes firm board and borehole wall contact, increase the stability and the leakproofness of packing pipe.
Optionally, the packing tube is an elastic structure.
Optionally, the blowout prevention mechanism is including choke tube, spoiler, leading truck, regulation cover, lifting rope and rolling ware, it is connected with to seal the pipe lower part choke tube, choke tube internally connected has a plurality of the spoiler, choke tube internally connected has the leading truck, sliding connection has a plurality of on the leading truck regulation cover, be connected with between the regulation cover the lifting rope, apron rear portion upside is connected with the rolling ware, the rolling ware with the lifting rope is connected, the rolling ware is right the lifting rope is rolled up and released, can automatic control the regulation cover is in reciprocate on the leading truck, when the regulation cover upwards moves and adjacent the spoiler contacts, the choking effect weakens gas and other gas velocity of flow and accelerates.
Optionally, the integrated gas and coal dust discharging device further comprises a pressure relief mechanism for discharging gas and coal dust, the pressure relief mechanism comprises a gas treatment integration, a control rod, a gas discharge pipe and a coal dust discharge pipe, the top of the gas collecting cover is connected with the gas treatment integration, the front side of the lower part of the gas treatment integration is connected with the control rod in a sliding mode, the left side of the upper part of the gas treatment integration is connected with the gas discharge pipe, the right side of the upper part of the gas treatment integration is connected with the coal dust discharge pipe, the gas treatment integration can distinguish and treat the ejected gas and coal dust, the gas discharge pipe discharges the gas, and the coal dust discharge pipe discharges the coal dust.
Optionally, the gas treatment device further comprises a monitoring mechanism for monitoring the gas content, the monitoring mechanism comprises a gas detector, a display, a gas pressure measuring membrane and a connecting frame, the left side of the gas collecting cover is connected with the gas detector, the left side of the gas detector is connected with the display, the inner side of the right part of the gas collecting cover is connected with the gas pressure measuring membrane, the right side of the gas collecting cover is slidably connected with the connecting frame, the connecting frame is slidably connected with the control rod, the gas detector detects the gas content in the gas collecting cover, when the gas pressure in the gas collecting cover is gradually increased, the gas pressure measuring membrane is extruded, so that the gas pressure measuring membrane is controlled to expand, the connecting frame moves rightwards to drive the control rod to move rightwards to start the gas treatment integration, after the gas treatment is completed, the gas pressure is reduced, the gas pressure measuring membrane is restored, so that the connecting frame resets leftwards to drive the control rod to reset leftwards, and the gas treatment integration is closed.
Optionally, the cover plate is provided with a plurality of anchoring rods, and when the cover plate is installed at the drilling hole opening, the anchoring rods fix the cover plate at the drilling hole opening, so that the stability of the cover plate is improved.
The beneficial effects of the invention are as follows: 1. according to the invention, the air is injected into the expansion bag through the air pump, the expansion bag expands to deform the lower part of the packing tube, so that the stabilizing plate is promoted to be contacted with the wall of the drilling hole, the stability and the tightness of the packing tube are improved, the effect of increasing the connection tightness degree between the orifice blowout preventer and the orifice and improving the stability of the orifice blowout preventer and the gas blowout preventer can be achieved.
2. According to the invention, the lifting rope is controlled through the winder, and the lifting rope controls and regulates the cover to move up and down on the guide frame, so that the effect of adapting to different gas spraying conditions and controlling the gas flow rate according to different conditions can be achieved.
3. According to the invention, the gas and the coal dust can be treated in a distinguishing way through the gas treatment integration, the gas is discharged through the gas discharge pipe, and the coal dust is discharged through the coal dust discharge pipe, so that the gas and the coal dust can be discharged in a distinguishing way, and the gas discharge treatment efficiency is improved.
4. According to the invention, the connecting frame is controlled to move rightwards through the expansion of the air pressure measuring film, and the connecting frame moves rightwards to drive the control rod to move rightwards to start the operation of gas treatment integration, so that the gas can be intermittently discharged, the gas content is detected in real time, and the gas discharge controllability is improved.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a cross-sectional view of the structure of the present invention.
Fig. 3 is a schematic perspective view of a packing mechanism according to the present invention.
Fig. 4 is a schematic perspective view of the blowout prevention mechanism of the present invention.
Fig. 5 is a schematic view of a partial perspective structure of the blowout prevention mechanism of the present invention.
Fig. 6 is a schematic perspective view of a pressure relief mechanism according to the present invention.
Fig. 7 is a schematic perspective view of the monitoring mechanism of the present invention.
Meaning of reference numerals in the drawings: 1: cover plate, 11: gas collecting channel, 2: packing mechanism, 20: packing tube, 21: stabilizing plate, 22: inflation bladder, 23: air pump, 3: blowout prevention mechanism, 30: choke tube, 3001: spoiler, 31: guide frame, 32: adjustment cap, 33: lifting rope, 34: winder, 4: pressure relief mechanism, 40: gas treatment integration, 41: control lever, 42: gas discharge pipe, 43: coal dust discharge pipe, 5: monitoring mechanism, 50: gas detector, 51: display, 52: air pressure measuring membrane, 53: connecting frame, 6: an anchor rod.
Detailed Description
The following description is of the preferred embodiments of the invention, and is not intended to limit the scope of the invention.
The utility model provides a coal seam drilling drill way blowout preventer, as shown in fig. 1 and 2, including apron 1, gas collecting channel 11, seal and separate mechanism 2 and prevent spouting mechanism 3, apron 1 top is connected with gas collecting channel 11, apron 1 bottom is equipped with seal and separate mechanism 2, apron 1 rear portion upside is equipped with prevent spouting mechanism 3.
As shown in fig. 1-3, the packing mechanism 2 comprises a packing tube 20, a stabilizing plate 21, an expansion bag 22 and an air pump 23, the bottom of the cover plate 1 is connected with the packing tube 20, the packing tube 20 is of an elastic structure, the outer side of the lower part of the packing tube 20 is connected with the stabilizing plate 21, the inner side of the lower part of the packing tube 20 is connected with the expansion bag 22, the upper side of the front part of the cover plate 1 is connected with the air pump 23, and the air pump 23 is connected with the expansion bag 22 through a catheter.
As shown in fig. 1, 2, 4 and 5, the blowout prevention mechanism 3 includes a choke tube 30, a choke plate 3001, a guide frame 31, an adjusting cover 32, a lifting rope 33 and a winding device 34, the lower portion of the packing tube 20 is connected with the choke tube 30, the choke tube 30 is internally connected with a plurality of choke plates 3001, the choke tube 30 is internally connected with the guide frame 31, a plurality of adjusting covers 32 are slidably connected on the guide frame 31, the lifting rope 33 is connected between the adjusting covers 32, the winding device 34 is connected on the upper side of the rear portion of the cover plate 1, and the winding device 34 is connected with the lifting rope 33.
As shown in fig. 1 and 2, the cover plate 1 further comprises a plurality of anchoring rods 6, and the plurality of anchoring rods 6 are arranged on the cover plate 1.
When the invention is used, the packing tube 20 is penetrated into the hole opening of the rotary hole to start the air pump 23, the air pump 23 injects air into the expansion bag 22, the expansion bag 22 expands to deform the lower part of the packing tube 20, so that the firm plate 21 is contacted with the wall of the hole, the stability and the tightness of the packing tube 20 are increased, when the cover plate 1 is arranged at the hole opening of the hole, the anchor rod 6 fixes the cover plate 1 at the hole opening of the hole, the stability of the cover plate 1 is increased, gas in the hole is sprayed into the choke tube 30, the air pump is blocked by the restriction of the choke plate 3001 and the regulating cover 32, when the regulating cover 32 is not contacted with the choke plate 3001, the gas flow can form vortex in the regulating cover 32, the flow rate of the gas is matched with the choke plate 3001, the winding device 34 is used for winding and releasing the lifting rope 33, the regulating cover 32 can be automatically controlled to move up and down on the guide frame 31, the regulating cover 32 is moved up and down, the gas flow rate is controlled by the same with the adjacent lifting rope 33 when the regulating cover 32 moves up and the adjacent to the lifting rope 3001, the gas flow rate is not matched with the regulating cover 32, and the flow rate is controlled by the regulating cover 32, and the air flow rate is controlled by the same speed of the lifting rope.
As shown in fig. 1, 2, 6 and 7, the gas treatment device further comprises a pressure relief mechanism 4, the pressure relief mechanism 4 comprises a gas treatment integration 40, a control rod 41, a gas discharge pipe 42 and a coal dust discharge pipe 43, the top of the gas collection cover 11 is connected with the gas treatment integration 40, the front side of the lower part of the gas treatment integration 40 is slidably connected with the control rod 41, the left side of the upper part of the gas treatment integration 40 is connected with the gas discharge pipe 42, and the right side of the upper part of the gas treatment integration 40 is connected with the coal dust discharge pipe 43.
With the pressure relief mechanism 4 of the present invention, gas and dust can be discharged, and when gas is discharged, the gas discharge pipe 42 and the dust discharge pipe 43 are connected to a discharge pipe, and the gas processing unit 40 can separate the discharged gas and dust, and the gas discharge pipe 42 discharges the gas, and the dust discharge pipe 43 discharges the dust, so that the gas discharge processing efficiency can be improved.
As shown in fig. 1, 2, 6 and 7, the gas collecting device further comprises a monitoring mechanism 5, the monitoring mechanism 5 comprises a gas detector 50, a display 51, a gas pressure measuring membrane 52 and a connecting frame 53, the left side of the gas collecting cover 11 is connected with the gas detector 50, the left side of the gas detector 50 is connected with the display 51, the inner side of the right part of the gas collecting cover 11 is connected with the gas pressure measuring membrane 52, the right side of the gas collecting cover 11 is slidably connected with the connecting frame 53, and the connecting frame 53 is slidably connected with the control rod 41.
By using the monitoring mechanism 5 of the present invention, the gas content can be monitored, the gas detector 50 detects the gas content in the gas collecting hood 11, when the gas pressure in the gas collecting hood 11 is gradually increased, the gas pressure measuring film 52 is extruded, so that the gas pressure measuring film 52 expands to control the connecting frame 53 to move rightwards, the connecting frame 53 moves rightwards to drive the control rod 41 to move rightwards to start the gas processing integration 40, after the gas processing is completed, the gas pressure is reduced, the gas pressure measuring film 52 recovers, so that the connecting frame 53 resets leftwards to drive the control rod 41 to reset leftwards to close the gas processing integration 40, the connecting frame 53 moves rightwards to drive the control rod 41 to start the operation of the gas processing integration 40 through the expansion of the gas pressure measuring film 52, intermittent gas emission processing can be performed, and the gas content is detected in real time, so that the gas emission controllability is improved.
The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. All equivalents and alternatives falling within the spirit of the invention are intended to be included within the scope of the invention. What is not elaborated on the invention belongs to the prior art which is known to the person skilled in the art.
Claims (7)
1. The utility model provides a coal seam drilling drill way blowout preventer, characterized by, including apron (1), gas collecting channel (11), seal and separate mechanism (2) and blowout prevention mechanism (3), apron (1) top is connected with gas collecting channel (11), apron (1) bottom is equipped with to seal drilling drill way separate mechanism (2), apron (1) rear portion upside is equipped with prevents gas blowout well blowout prevention mechanism (3).
2. The blowout preventer for the coal seam drilling hole opening according to claim 1, wherein the packing mechanism (2) comprises a packing tube (20), a stabilizing plate (21), an expansion bag (22) and an air pump (23), the bottom of the cover plate (1) is connected with the packing tube (20), the outer side of the lower part of the packing tube (20) is connected with the stabilizing plate (21), the inner side of the lower part of the packing tube (20) is connected with the expansion bag (22), the upper side of the front part of the cover plate (1) is connected with the air pump (23), the air pump (23) is connected with the expansion bag (22) through a guide pipe, the packing tube (20) penetrates into the hole opening to start the air pump (23), the air pump (23) injects air into the expansion bag (22), the expansion bag (22) expands to deform the lower part of the packing tube (20), and the stabilizing plate (21) is enabled to be contacted with the drilling hole wall, and stability and sealing performance of the packing tube (20) are improved.
3. A coal seam drilling port blowout preventer as claimed in claim 2, wherein the packer pipe (20) is of resilient construction.
4. A coal seam drilling hole orifice blowout preventer according to claim 3, wherein the blowout preventer (3) comprises a choke tube (30), a choke plate (3001), a guide frame (31), an adjusting cover (32), a lifting rope (33) and a winding device (34), the choke tube (30) is connected to the lower part of the packer tube (20), the choke tube (30) is internally connected with a plurality of choke plates (3001), the choke tube (30) is internally connected with the guide frame (31), the guide frame (31) is connected with a plurality of adjusting covers (32) in a sliding manner, the lifting rope (33) is connected between the adjusting covers (32), the upper side of the rear part of the cover plate (1) is connected with the winding device (34), the winding device (34) is connected with the lifting rope (33), the winding device (34) winds and releases the lifting rope (33), the adjusting cover (32) can be automatically controlled to move up and down on the guide frame (31), and the air flow rate of the adjusting cover (32) can be accelerated when the air flow rate of the air flowing up and down is accelerated, and the air flowing down of the adjacent air flowing device (3001) can be accelerated.
5. The coal seam drilling hole orifice blowout preventer of claim 4, further comprising a pressure relief mechanism (4) for discharging gas and coal dust, wherein the pressure relief mechanism (4) comprises a gas treatment integration (40), a control rod (41), a gas discharge pipe (42) and a coal dust discharge pipe (43), the top of the gas collection cover (11) is connected with the gas treatment integration (40), the front side of the lower part of the gas treatment integration (40) is slidably connected with the control rod (41), the left side of the upper part of the gas treatment integration (40) is connected with the gas discharge pipe (42), the right side of the upper part of the gas treatment integration (40) is connected with the coal dust discharge pipe (43), the gas treatment integration (40) can distinguish the discharged gas and coal dust, and the gas discharge pipe (42) discharges the gas and the coal dust.
6. The blowout preventer for coal seam drilling holes, as set forth in claim 5, further comprising a monitoring mechanism (5) for monitoring the gas content, wherein the monitoring mechanism (5) comprises a gas detector (50), a display (51), a gas pressure measuring membrane (52) and a connecting frame (53), the gas detector (50) is connected to the left side of the gas collecting cover (11), the display (51) is connected to the left side of the gas detector (50), the gas pressure measuring membrane (52) is connected to the inner side of the right side of the gas collecting cover (11), the connecting frame (53) is slidingly connected to the right side of the gas collecting cover (11), the connecting frame (53) is slidingly connected with the control rod (41), the gas detector (50) detects the gas content in the gas collecting cover (11), when the gas pressure in the gas collecting cover (11) is gradually increased, the gas pressure measuring membrane (52) is extruded, the gas pressure measuring membrane (52) is controlled to expand, the connecting frame (53) is controlled to move to the right, the gas pressure measuring membrane (41) is driven to move to the left, and the gas pressure measuring membrane (41) is reset to the right after the gas pressure measuring membrane (41) is reset, the gas pressure is controlled to move to the gas pressure measuring membrane (52) to the right, the gas treatment integration (40) is turned off.
7. A coal seam drilling port blast protection device as claimed in claim 6, further comprising an anchor rod (6), wherein a plurality of said anchor rods (6) are provided on said cover plate (1), and wherein said anchor rods (6) secure said cover plate (1) in said drilling port to increase stability of said cover plate (1) when said cover plate (1) is installed in said drilling port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410023922.8A CN117803345A (en) | 2024-01-06 | 2024-01-06 | Coal seam drilling orifice blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410023922.8A CN117803345A (en) | 2024-01-06 | 2024-01-06 | Coal seam drilling orifice blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117803345A true CN117803345A (en) | 2024-04-02 |
Family
ID=90433679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410023922.8A Pending CN117803345A (en) | 2024-01-06 | 2024-01-06 | Coal seam drilling orifice blowout preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117803345A (en) |
-
2024
- 2024-01-06 CN CN202410023922.8A patent/CN117803345A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110965955A (en) | Dust and blowout prevention device for coal mine gas drainage | |
| CN106869834A (en) | A kind of coal bed drilling drilling hole dust collector device | |
| CN116181227B (en) | High-pressure grouting drill rod device | |
| CN207813560U (en) | Coal seam waterpower buckling hole packer | |
| CN104741354A (en) | Discharging garbage pond with no odor emission | |
| CN215632881U (en) | Gas pressure reduction blowout prevention pre-control system | |
| CN117803345A (en) | Coal seam drilling orifice blowout preventer | |
| CN211370341U (en) | Dust and blowout prevention device for coal mine gas drainage | |
| CN204544938U (en) | A kind of odorless distributes discharging garbage pool | |
| CN102128047A (en) | Gas-slag separation and recovering system for drilling construction | |
| CN108561176B (en) | Automatic blocking and permeability-increasing device and method for gas extraction drilling | |
| CN214091954U (en) | Hydraulic-driven automatic slag discharging device for gas extraction pipeline | |
| CN113225964B (en) | Energy-conserving concentric dual-rotary drilling rig is with control system's high strength protector | |
| CN112709596B (en) | Hydraulic driving automatic slag discharging device for gas extraction pipeline | |
| CN110847128A (en) | Water retaining dam and method for regulating and controlling water flow | |
| CN215256295U (en) | Automatic dust removal and cooling system used in tunnel construction process | |
| CN110241795A (en) | A kind of ship compartment cleaning door pneumatic driving bleaching device | |
| CN210217829U (en) | Goaf drilling air blocking device | |
| CN210195753U (en) | Tunnel blasting excavation system | |
| CN219472051U (en) | Novel drilling slag blowout preventing device | |
| CN219299249U (en) | Blowout prevention safety device for drilling construction | |
| CN218716636U (en) | Gas drainage drilling protector | |
| CN117846666B (en) | Safety equipment with emergency function for tunnel engineering and use method thereof | |
| CN212743939U (en) | Gas drainage drilling work progress blowout preventer suitable for colliery | |
| JP2918466B2 (en) | Drainage pipe maintenance device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |