CN220248065U - Coal seam gas pressure relief and outburst prevention extraction device - Google Patents
Coal seam gas pressure relief and outburst prevention extraction device Download PDFInfo
- Publication number
- CN220248065U CN220248065U CN202321972045.6U CN202321972045U CN220248065U CN 220248065 U CN220248065 U CN 220248065U CN 202321972045 U CN202321972045 U CN 202321972045U CN 220248065 U CN220248065 U CN 220248065U
- Authority
- CN
- China
- Prior art keywords
- pressure
- drill bit
- hole
- sliding block
- shaft sleeve
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 21
- 238000000605 extraction Methods 0.000 title claims abstract description 20
- 230000002265 prevention Effects 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000001914 filtration Methods 0.000 claims abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 230000036346 tooth eruption Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000013016 damping Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003818 cinder Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Abstract
The utility model belongs to the technical field of gas extraction, and particularly relates to a coal seam gas pressure relief and outburst prevention extraction device which comprises a high-pressure jet slot cutter, a high-pressure switcher and a drill bit which are coaxially arranged, wherein a filter device for filtering foreign matters is arranged in the high-pressure jet slot cutter, and jet holes are formed in the high-pressure jet slot cutter; the high-voltage switcher comprises a step shaft and a shaft sleeve which can slide relatively, a second through hole and an annular mounting groove are arranged in the step shaft, and a sliding block is arranged in the mounting groove; the drill bit is internally provided with a slag-reflecting prevention device for preventing foreign matters from entering the drill bit, and the drill bit is provided with a push rod; when the drill bit works at low pressure, the drill bit ejector rod props against the sliding block, a water gap exists between the sliding block and the second mounting groove, when the drill bit is in high pressure work, the shaft sleeve drives the drill bit ejector rod to be far away from the sliding block, the sliding block seals the second through hole under the pressure of high-pressure water, and the high-pressure water is ejected from the jet hole; the problems of low success rate of high and low pressure conversion caused by small water flow and foreign matters entering the device in the prior art are solved.
Description
Technical Field
The utility model belongs to the technical field of gas extraction, and particularly relates to a coal seam gas pressure relief and outburst prevention extraction device.
Background
The high-pressure water jet technology is characterized in that water is used as a carrier, mechanical energy is converted into pressure energy through a specific nozzle or pressurizing equipment by a liquid pressurizing principle, jet flow with higher energy is formed through a nozzle small hole, and the pressure energy is converted into kinetic energy, so that the high-pressure water jet technology is mainly used for cleaning and derusting, water cutting and rock breaking and crushing, and has the advantages of low cost, good quality, high speed, no environmental pollution, no metal corrosion and the like, and is widely applied to various industrial fields.
The application of the high-pressure water jet technology in underground coal mines is usually for realizing high-pressure hydraulic slotting or punching, and in the aspect of coal mine gas disaster prevention, the high-pressure water jet technology is usually utilized for releasing pressure and increasing permeability of coal bodies, so that the air permeability of the coal bodies is improved, the gas extraction efficiency is further improved, and the mine safety production condition is improved. Because the underground common drill bit suitable for coal seam drilling can only work through low-pressure water, the underground common drill bit is mainly used for cooling the drill bit and discharging cinder in the drilling process, when high-pressure water jet operation is needed, the low-pressure water supply drill bit is usually utilized to construct a drill hole in the coal seam, then the drill bit is withdrawn from all drill rods, and then the high-pressure water jet drill bit is installed and sent into the drill hole for operation, so that the working procedure is very complicated.
In order to save the complex procedures of withdrawing the drill rod and switching the drill bit and realize automatic switching of high-pressure water and low-pressure water, chinese patent utility model patent No. CN 210033284U discloses an automatic switching device of high-pressure fluid and low-pressure fluid, which comprises a high-pressure switcher coaxially arranged between a high-pressure jet slot cutter and the drill rod through threaded connection, wherein the high-pressure switcher comprises a switcher body, a valve core and a damping spring; when the low-pressure water drilling is carried out, the high-pressure jet hole is always in a closed state of blocking; after the drilling is formed, high-pressure water is started, the valve core is pushed by the high-pressure water to overcome the elasticity of the damping spring to move forwards, so that the valve core blocks the through hole in the high-pressure switcher, the high-pressure water is sprayed out through the high-pressure jet hole, and then coal body cutting or punching can be performed. This patent need not to switch the drill bit and can realize high, low pressure water and switch, has advantages such as the installation is dismantled conveniently, work efficiency is higher, still has following problem: the foreign matters such as rock coal dust can not be filtered, if the foreign matters enter the inside to be accumulated, the valve core and the damping spring can be difficult to move in the switcher body, or the jet holes, the water inlet holes and the water outlet holes of the drill bit are blocked, the high-low pressure conversion is affected, and the high-low pressure conversion success rate is low.
Disclosure of Invention
The utility model aims to provide a coal seam gas pressure relief and outburst prevention extraction device, which aims to solve the technical problems that in the prior art, the bit water passing amount is small, foreign matters easily enter the device, high-low pressure conversion failure is caused, and the conversion success rate is low.
In order to solve the technical problems, the utility model provides the following technical scheme:
the utility model provides a coal seam gas release, prevent suddenly taking out device, includes coaxial arrangement's high-pressure jet slot cutter, high-pressure switch and drill bit;
a drill rod mounting port is formed in one end of the high-pressure jet flow slotting device, a first through hole and a filtering device are formed in the high-pressure jet flow slotting device, the filtering device is used for preventing foreign matters from entering the high-pressure jet flow slotting device, a plurality of jet holes communicated with the first through hole are formed in the radial direction of the high-pressure jet flow slotting device, and the jet holes are used for jetting high-pressure water;
the high-pressure switcher comprises a step shaft and a shaft sleeve, the step shaft comprises a large-diameter section and a small-diameter section, the step shaft is positioned in the shaft sleeve, the step shaft and the shaft sleeve can slide relatively, the small-diameter end of the step shaft is fixedly connected with the high-pressure jet flow slotting device, a second through hole and an annular mounting groove communicated with the second through hole are formed in the step shaft, a sliding block is arranged in the mounting groove, the diameter of the sliding block is larger than that of the second through hole Kong Juxiao in the mounting groove, and a conical hole for mounting a drill bit is formed in one end, far away from the high-pressure jet flow slotting device, of the shaft sleeve;
the drill bit is arranged in a conical hole of the shaft sleeve, a water passing channel and an anti-slag device for preventing foreign matters from entering the drill bit are arranged in the drill bit, a push rod and a plurality of water inlet holes are arranged at one end of the drill bit, cutting teeth and a plurality of water outlet holes are arranged at the other end of the drill bit, and the water inlet holes, the water passing channel and the water outlet holes are communicated;
when in low-pressure work, the drill head ejector rod can penetrate through the second through hole to enter the mounting groove to prop against the sliding block, a water gap exists between the sliding block and the second mounting groove, and when in high-pressure work, the shaft sleeve drives the ejector rod of the drill head to be away from the sliding block, and the sliding block seals the second through hole under the pressure effect of high-pressure water.
Further, one end of the shaft sleeve, which is far away from the drill bit, is provided with a sealing ring, and the sealing ring is positioned between the step shaft and the shaft sleeve.
Further, the slag-reflecting prevention device is a filter screen arranged in the drill bit water passing channel.
Further, the filtering device is a filter screen arranged in the jet hole of the high-pressure jet slot cutter.
Further, the distance between the step shaft and the shaft sleeve capable of sliding relatively is 25-35 mm.
Further, the high-pressure jet slot cutter is provided with a plurality of nozzles, and the nozzles are communicated with jet holes.
Furthermore, the high-pressure jet flow slotting device and the high-pressure switcher are both made of high-performance non-magnetic steel materials.
Further, the sealing ring is made of hydrogenated nitrile rubber material.
The technical principle of the utility model is as follows:
when in use, the drill rod is arranged in a drill rod mounting port of the high-pressure jet slot cutter, and the drill bit is arranged in the conical hole; when the low-pressure working machine works, the high-pressure switcher is in a contracted state, the ejector rod of the drill bit is propped against the sliding block, a water passing gap exists between the sliding block and the second mounting groove, low-pressure water sequentially passes through the first through hole and the second through hole from the drill rod, enters the water inlet hole and the water passing channel of the drill bit, is finally discharged from the water outlet hole of the drill bit, the drill bit normally discharges water, and the water yield meets the requirement of normal drilling; when the high-pressure jet slot cutter works, high-pressure water sequentially passes through the first through hole and the second through hole from the drill rod, the impact force of the high-pressure water acts on the front end of the shaft sleeve to enable the shaft sleeve to slide forwards along the axial direction of the step, the high-pressure switcher is in an extension state, the shaft sleeve drives the ejector rod to be far away from the sliding block, the high-pressure water acts on the sliding block to enable the sliding block to move forwards in the mounting groove until the sliding block blocks the front end of the second through hole, the high-pressure water cannot enter the drill bit, and the high-pressure water is ejected from the jet hole of the high-pressure jet slot cutter.
Compared with the prior art, the utility model has the following beneficial technical effects:
1. the high-pressure switcher adopts the shaft sleeve slide block type to realize the switching of the high-pressure and low-pressure working states, even if the pressure switching of the high-pressure switcher fails, the switching can be realized by using a mechanical mode, the friction force between a coal seam and the shaft sleeve as well as between a drill bit can fix the high-pressure switcher and the shaft sleeve in the coal seam, a drill rod is pulled backwards by a drilling machine during the switching, the drill rod drives a step shaft to slide backwards relative to the shaft sleeve, so that the ejector rod is far away from the slide block, and high-pressure water impacts the slide block to block the front end of a second through hole, namely, the high-pressure working state is realized; compared with the structure adopting damping springs and valve cores in the prior art, the switching success rate is high.
2. According to the utility model, the slag reflection preventing device and the filtering device which only allow water to flow are arranged in the water passing channel and the jet hole, so that foreign matters such as external coal slag dust and the like can be prevented from entering the extraction device, and the jet hole of the drill bit water inlet hole and the high-pressure jet slot cutter is prevented from being blocked, so that the high-pressure and low-pressure switching of the extraction device is smoother when the extraction device is used.
3. According to the utility model, the sealing ring is arranged between the step shaft and the shaft sleeve, so that the tightness can be enhanced, and foreign matters such as dust, cinder and the like are prevented from entering; the sealing ring is made of wear-resistant, corrosion-resistant and high-strength hydrogenated nitrile rubber, and the service life of the sealing ring is long.
4. The high-pressure jet slot cutter and the high-pressure switcher are made of high-performance non-magnetic steel materials, and the non-magnetic steel materials have the characteristics of wear resistance, acid resistance, alkali resistance, corrosion resistance and the like, so that the sufficient service life is ensured.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a cross-sectional view of the low pressure operation state of the present utility model;
fig. 3 is a cross-sectional view of the high-pressure operation state of the present utility model.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include:
the high-pressure jet slotting machine 1, a drill rod mounting port 11, a first through hole 12, a filtering device 13, a jet hole 14 and a nozzle 15;
the high-voltage switcher 2, the step shaft 21, the shaft sleeve 22, the second through hole 23, the mounting groove 24, the sliding block 25, the conical hole 26 and the sealing ring 27;
drill bit 3, ejector rod 31, inlet opening 32, cutting tooth 33, water channel 34, anti-slag device 35.
Examples
As shown in fig. 1, the coalbed methane pressure relief and outburst prevention extraction device comprises a high-pressure jet flow slotting device 1, a high-pressure switcher 2 and a drill bit 3 which are coaxially arranged.
As shown in fig. 2 and 3, the left end of the high-pressure jet slot cutter 1 is provided with a drill rod mounting port 11, and an internal thread is arranged in the drill rod mounting port 11; the high-pressure jet flow slotting device 1 is internally provided with a first through hole 12 penetrating through the left end and the right end, the outer wall of the high-pressure jet flow slotting device 1 is provided with a plurality of nozzles 15 in the radial direction, the radial direction of the high-pressure jet flow slotting device 1 is provided with a plurality of jet holes 14 for jetting high-pressure water, the two ends of each jet hole 14 are respectively communicated with the first through hole 12 and the nozzles 15, and a filtering device 13 for preventing foreign matters from entering the high-pressure jet flow slotting device 1 is fixed in each jet hole 14; in this embodiment, two nozzles 15 and two jet holes 14 are provided, and the two nozzles 15 and the two jet holes 14 are located in the same diameter direction of the high-pressure jet slot cutter 1.
As shown in fig. 2 and 3, the high-voltage switcher 2 comprises a step shaft 21 and a shaft sleeve 22, the step shaft 21 comprises a large-diameter section and a small-diameter section, the step shaft 21 is positioned in the shaft sleeve 22, the step shaft 21 and the shaft sleeve 22 can slide by 25-35 mm relatively, the sliding distance is set to be 30mm in the embodiment, and the left end of the step shaft 21 is welded and fixed with the right end of the high-voltage jet slot cutter 1; the step shaft 21 is internally provided with a second through hole 23 penetrating through the left end and the right end, the large-diameter section of the step shaft 21 is provided with an annular mounting groove 24 communicated with the second through hole 23, the mounting groove 24 is internally provided with a sliding block 25, and the diameter of the sliding block 25 is larger than that of the second through hole 23 and smaller than that of the mounting groove 24; the left end of the shaft sleeve 22 is fixedly adhered with a sealing ring 27, the sealing ring 27 is positioned between the small-diameter section of the step shaft 21 and the shaft sleeve 22, and the sealing ring 27 is made of hydrogenated nitrile rubber material; the right end of the shaft sleeve 22 is provided with a conical hole 26 for installing the drill bit 3, and the conical hole 26 is internally provided with internal threads.
As shown in fig. 2 and 3, the outer wall of the drill bit 3 is provided with external threads, and the drill bit 3 is in threaded fit in the conical hole 26 of the shaft sleeve 22; the inside of the drill bit 3 is hollow to form a water channel 34, and an anti-slag device 35 for preventing foreign matters from entering the drill bit 3 is fixed in the water channel 34; the left end face of the drill bit 3 is integrally formed with a push rod 31, and the right end of the drill bit 3 is integrally formed with a cutting tooth 33; the left end face of the drill bit 3 is provided with a plurality of water inlet holes 32, the right end of the drill bit 3 is provided with a plurality of water outlet holes, and the water inlet holes 32, the water channel 34 and the water outlet holes are communicated.
The high-pressure jet slot cutter 1 and the high-pressure switcher 2 in the embodiment are made of high-performance non-magnetic steel materials; the filtering device 13 in the high-pressure jet slot cutter 1 and the slag-reflecting prevention device 35 in the drill bit 3 are filter screens.
When the utility model is used, the drill rod and the drill bit 3 are respectively arranged in the drill rod mounting port 11 and the conical hole 26 in a threaded manner; as shown in fig. 2, when the utility model is in a low-pressure working state, the step shaft 21 is wholly positioned in the shaft sleeve 22, the high-pressure switcher 2 is in a contracted state, the ejector rod 31 of the drill bit 3 is propped against the sliding block 25, a water passing gap exists between the sliding block 25 and the second mounting groove 24, low-pressure water sequentially passes through the first through hole 12 and the second through hole 23 from the drill rod, enters the water inlet 32 and the water passing channel 34 of the drill bit 3, finally is discharged from the water outlet of the drill bit 3, the drill bit 3 normally discharges water, and the water yield meets the requirement of normal drilling; when the high-pressure water jet slot cutter is switched from a low-pressure working state to a high-pressure working state, high-pressure water sequentially passes through the first through hole 12 and the second through hole 23 from a drill rod, the impact force of the high-pressure water acts on the inner wall of the right end of the shaft sleeve 22, so that the shaft sleeve 22 slides rightward along the outer wall of the step shaft 21, the small-diameter section of the step shaft 21 gradually slides out of the shaft sleeve 22, the high-pressure switcher 2 is in an elongation state, the shaft sleeve 22 drives the ejector rod 31 to move rightward and then far away from the sliding block 25, the impact force of the high-pressure water acts on the sliding block 25, the sliding block 25 moves rightward in the mounting groove 24 until the sliding block 25 blocks the front end of the second through hole 23, the high-pressure water cannot enter the drill bit 3, and the high-pressure water is ejected from the jet hole 14 of the high-pressure jet slot cutter 1, namely the high-pressure working state shown in fig. 3 is switched.
The high-voltage switcher 2 in the utility model adopts the slide block 25 of the shaft sleeve 22 to realize the switching of the high-voltage and low-voltage working states, even if the pressure switching of the high-voltage switcher 2 fails, the switching can be realized by using a mechanical mode, the friction force between the coal seam and the shaft sleeve 22 as well as between the coal seam and the drill bit 3 ensures that the two are fixed in the coal seam, a drilling machine is used for pulling a drilling rod backwards during the switching, the drilling rod drives the step shaft 21 to slide backwards relative to the shaft sleeve 22, so that the ejector rod 31 is far away from the slide block 25, and the high-pressure water impacts the slide block 25 to block the front end of the second through hole 23, namely, the high-voltage working state is switched; compared with the structure adopting damping springs and valve cores in the prior art, the switching success rate is high.
According to the utility model, the water channel 34 and the jet hole 14 are internally provided with the slag reflection preventing device 35 and the filtering device 13 which only allow water to flow, so that foreign matters such as external cinder dust can be prevented from entering the extraction device, and the water inlet 32 of the drill bit 3 and the jet hole 14 of the high-pressure jet slot cutter 1 are prevented from being blocked, so that the high-pressure and low-pressure switching is smoother when the high-pressure jet slot cutter is used.
The sealing ring 27 is arranged between the step shaft 21 and the shaft sleeve 22, so that the tightness can be enhanced, and foreign matters such as dust, coal slag and the like can be prevented from entering; the sealing ring 27 is made of wear-resistant, corrosion-resistant and high-strength hydrogenated nitrile rubber, and the service life of the sealing ring 27 is long; the high-pressure jet flow slotting device 1 and the high-pressure switcher 2 are made of high-performance non-magnetic steel materials, and the non-magnetic steel materials have the characteristics of wear resistance, acid resistance, alkali resistance, corrosion resistance and the like, so that the device is ensured to have enough service life.
The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. The utility model provides a coal seam gas release, prevent suddenly taking out device which characterized in that: comprises a high-pressure jet slot cutter, a high-pressure switcher and a drill bit which are coaxially arranged;
a drill rod mounting port is formed in one end of the high-pressure jet flow slotting device, a first through hole and a filtering device are formed in the high-pressure jet flow slotting device, the filtering device is used for preventing foreign matters from entering the high-pressure jet flow slotting device, a plurality of jet holes communicated with the first through hole are formed in the radial direction of the high-pressure jet flow slotting device, and the jet holes are used for jetting high-pressure water;
the high-pressure switcher comprises a step shaft and a shaft sleeve, the step shaft comprises a large-diameter section and a small-diameter section, the step shaft is positioned in the shaft sleeve, the step shaft and the shaft sleeve can slide relatively, the small-diameter end of the step shaft is fixedly connected with the high-pressure jet flow slotting device, a second through hole and an annular mounting groove communicated with the second through hole are formed in the step shaft, a sliding block is arranged in the mounting groove, the diameter of the sliding block is larger than that of the second through hole Kong Juxiao in the mounting groove, and a conical hole for mounting a drill bit is formed in one end, far away from the high-pressure jet flow slotting device, of the shaft sleeve;
the drill bit is arranged in a conical hole of the shaft sleeve, a water passing channel and an anti-slag device for preventing foreign matters from entering the drill bit are arranged in the drill bit, a push rod and a plurality of water inlet holes are arranged at one end of the drill bit, cutting teeth and a plurality of water outlet holes are arranged at the other end of the drill bit, and the water inlet holes, the water passing channel and the water outlet holes are communicated;
when in low-pressure work, the drill head ejector rod can penetrate through the second through hole to enter the mounting groove to prop against the sliding block, a water gap exists between the sliding block and the second mounting groove, and when in high-pressure work, the shaft sleeve drives the ejector rod of the drill head to be away from the sliding block, and the sliding block seals the second through hole under the pressure effect of high-pressure water.
2. The coalbed methane pressure relief and outburst prevention extraction device according to claim 1, wherein: one end of the shaft sleeve, which is far away from the drill bit, is provided with a sealing ring, and the sealing ring is positioned between the step shaft and the shaft sleeve.
3. The coalbed methane pressure relief and outburst prevention extraction device according to claim 1, wherein: the slag-reflecting prevention device is a filter screen arranged in the drill bit water passing channel.
4. The coalbed methane pressure relief and outburst prevention extraction device according to claim 1, wherein: the filtering device is a filter screen arranged in the jet hole of the high-pressure jet slot cutter.
5. The coalbed methane pressure relief and outburst prevention extraction device according to claim 1, wherein: the distance between the step shaft and the shaft sleeve which can slide relatively is 25-35 mm.
6. The coalbed methane pressure relief and outburst prevention extraction device according to claim 1, wherein: the high-pressure jet slot cutter is provided with a plurality of nozzles which are communicated with the jet holes.
7. The coalbed methane pressure relief and outburst prevention extraction device according to claim 1, wherein: the high-pressure jet slot cutter and the high-pressure switcher are both made of high-performance non-magnetic steel materials.
8. The coalbed methane pressure relief and outburst prevention extraction device according to claim 2, wherein: the sealing ring is made of hydrogenated nitrile rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321972045.6U CN220248065U (en) | 2023-07-26 | 2023-07-26 | Coal seam gas pressure relief and outburst prevention extraction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321972045.6U CN220248065U (en) | 2023-07-26 | 2023-07-26 | Coal seam gas pressure relief and outburst prevention extraction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220248065U true CN220248065U (en) | 2023-12-26 |
Family
ID=89230060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321972045.6U Active CN220248065U (en) | 2023-07-26 | 2023-07-26 | Coal seam gas pressure relief and outburst prevention extraction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220248065U (en) |
-
2023
- 2023-07-26 CN CN202321972045.6U patent/CN220248065U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108547604B (en) | Drilling and stamping integrated device and method | |
| CN101532391B (en) | In-hole drilling tool integrating drilling, slotting and punching coal seam and using method thereof | |
| CN210033284U (en) | Automatic switching device for high-low pressure fluid | |
| CN103291219B (en) | Drilling and punching integrated hydraulic drill bit | |
| CN103174421B (en) | Automatic control hydraulic rock breaking pick | |
| CN205823169U (en) | Bore/punching integration anti-blockage holes highly effective slag draining drill bit | |
| CN201391331Y (en) | Integral in-hole drilling tool for drilling slotting punched hole of coal seam | |
| CN111287660B (en) | Impact rotary jet drilling tool | |
| CN112796672B (en) | Mining drilling and cutting integrated drill bit with springs and working method thereof | |
| CN110965955A (en) | Dust and blowout prevention device for coal mine gas drainage | |
| CN115354980A (en) | Double-power double-pipe shield pressure relief fluid slag discharging drilling tool for deep coal seam | |
| CN113882855A (en) | Plug-in type high-low pressure accurate switching slotting device, slotting device and using method | |
| CN220248065U (en) | Coal seam gas pressure relief and outburst prevention extraction device | |
| CN209924950U (en) | Drilling tool blowout prevention valve with liquid flow impact resistance and liquid flow erosion resistance | |
| CN220036583U (en) | Directional drilling hydraulic hole making device | |
| CN103573193B (en) | Integration is bored and is cut boring rod set | |
| CN203547562U (en) | Integrated drilling and cutting drill stem | |
| CN210152612U (en) | Drilling rod conversion equipment that punches a hole for coal mine | |
| CN210087274U (en) | Sand-flushing hydraulic cutting knife | |
| CN216691077U (en) | Mining dual-channel drill rod drainage device | |
| CN215369709U (en) | Mining integrated drill bit that splits | |
| CN221838253U (en) | High-low pressure fluid automatic converter | |
| CN220248066U (en) | Gas pressure relief, outburst prevention and extraction device | |
| CN214463921U (en) | Mining drilling and cutting integrated drill bit with spring | |
| CN211950337U (en) | Impact rotary jet drilling tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |