Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels › E21F 7 - Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose
Patents for E21F 7 - Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose (2,187)
05/2014
05/07/2014CN203584460U 一种瓦斯稀释排放器 One kind of gas dilution eductor
05/07/2014CN203584459U 新型钻杆式瓦斯封孔器 The new drill-type gas sealing device
05/07/2014CN203584458U 一种矿用移动式瓦斯抽放泵站 One kind of mine gas drainage pumping stations mobile
05/07/2014CN203584405U 煤层瓦斯抽采钻孔稳定性测试装置 Coal Seam Gas Borehole stability test device
05/07/2014CN103781993A 用于含气且低渗透性的煤矿层的开采方法 Mining methods and low permeability gas for coal layer
05/07/2014CN103775734A 大口径井下瓦斯抽放管路系统施工方法 Large-diameter underground gas drainage pipeline system construction method
05/07/2014CN103775127A 一种低透气性高瓦斯煤层群保护层瓦斯综合治理方法 A low air permeability and high gas seam group protective layer Comprehensive Gas Control Method
05/07/2014CN103775122A 易自燃高瓦斯煤层采空区瓦斯抽采与煤炭自燃模拟实验装置 And Inflammable High Gas Coal Seam Gas extraction and coal spontaneous combustion simulation device
05/07/2014CN103775121A 一种水力割缝u形孔排渣瓦斯治理方法 One kind of slotting u-shaped hole slagging Gas Treatment Methods
05/07/2014CN103775120A 一种上行瓦斯抽采钻孔钻屑封孔方法 Uplink gas drainage drilling cuttings sealing method
05/07/2014CN102536303B 煤矿中煤层硫化氢、瓦斯稀释剂 Hydrogen sulfide in coal mines, gas diluents
05/01/2014US20140117739 Mining Method for Gassy and Low Permeability Coal Seams
04/2014
04/30/2014EP2723986A2 Mining method for gassy and low permeability coal seams
04/30/2014CN203570571U Heat dissipation device for gas drainage pump
04/30/2014CN203570352U Drainage device used for gas pipeline
04/30/2014CN103758561A Coal mine gas extraction control system and extraction control method
04/30/2014CN103758560A Method for gas treatment in multiple progressive protection seam grouping regions
04/30/2014CN103758559A Gob-side entry retaining Y-type ventilation high-position return airway drilling gas extracting method
04/30/2014CN103758486A Pipeless grouting hole sealing device
04/30/2014CN103758484A Multi-stage hole collapse prevention construction device for gas extraction holes in soft coal growing area
04/24/2014WO2014059777A1 High-pressure pneumatic blasting pressure relieving and transmission increasing method
04/23/2014CN203559925U Comprehensive utilization system for coal mine gas
04/23/2014CN203559780U Drilling and cutting integrated drill for mining
04/23/2014CN103742188A Coal mine pump drainage gas well and drilling method thereof
04/23/2014CN103742098A Device and method for sealing hole by using returned slag of layer-through drill hole of low drainage roadway of coal mine
04/16/2014CN203547787U Gas drainage device
04/16/2014CN203547786U Gas extraction pipe
04/16/2014CN103727319A Stainless steel reinforcing rib spiral gas drainage pipe
04/16/2014CN103726869A Drilling with casing method for gas extraction hole of soft broken coal seam
04/16/2014CN102168544B Method for surface modification and transmission increase of coal reservoirs by using chlorine dioxide
04/09/2014CN203531958U Pneumatic negative pressure water discharge device
04/09/2014CN203531951U Large-discharge-capacity slagging and water draining device based on electromagnet control
04/09/2014CN203531877U Underground coal mine fracturing connecting device
04/09/2014CN103711515A Reusable multistage gasbag mucus gas extraction drilling and hole sealing device
04/09/2014CN102829234B Electro-hydraulic linkage quick stop valve of mine gas extracting pipeline
04/09/2014CN102268973B Hole sealing device
04/02/2014CN203515650U Drilling hole gas gush initial velocity tester
04/02/2014CN203515649U Rapid hole sealing bag
04/02/2014CN203515648U Double-hole pipe special for hole packer
04/02/2014CN203515460U Instant adhering type grouting bag pocket type hole sealing device
04/02/2014CN203515458U Double-hole pipe slurry filling hole sealing device
04/02/2014CN203515454U Quick hole packer
04/02/2014CN103698411A Device and method for improving coal bed gas desorption efficiency with microwaves
04/02/2014CN103696801A Method for testing surface borehole pressure relief gas drainage range
04/02/2014CN103696800A Drilling, cutting, pressing and pumping method
04/02/2014CN103696726A Gas drainage hole-sealing device
04/02/2014CN102337920B Gas and dust collecting device
03/2014
03/26/2014CN203499720U Multifunctional orifice sealing device for underground coal mine fracturing pump unit
03/26/2014CN103670499A Method for comprehensively dealing with situation of corner gas overrun of working face
03/26/2014CN103670498A Pre-pumping outburst prevention technology utilizing drill hole instead of stone drift
03/26/2014CN103670497A Gas treatment method used when tunneled underground coal mine roadway is communicated with abandoned roadway
03/26/2014CN103670496A Gob-side entry retaining and sectional coal seam gas pre-extracting method for single low-permeability outburst coal seam
03/26/2014CN103670495A Extraction device of coal mine ventilation air methane
03/26/2014CN103670494A Collection device of coal mine ventilation air methane
03/26/2014CN103670493A Ground gas emptying system
03/26/2014CN103670477A Conveying system of coal mine ventilation air methane
03/26/2014CN103670338A Method for extracting coalbed methane and coal together
03/26/2014CN102678166B Method for increasing gas extraction rate by permeability increasing of single thick coal seam
03/26/2014CN102661166B Method for purifying gas extracted by mine by using ionic liquid
03/26/2014CN102619476B Pipe body structure of step type hole protecting pipe for gas extraction hole in soft coal bed
03/26/2014CN102536305B Method for increasing permeability of inert gas and extracting gas
03/19/2014CN203489916U Multi-parameter measurement device for gas drainage
03/19/2014CN203488163U Gas-water separator with self-cooling function
03/19/2014CN103643988A Gas-water-slag separating buffer type gas spraying orifice preventive device
03/19/2014CN103643987A Gas collection, slag removal and drainage device for drill hole
03/19/2014CN103643986A Integrated device for synergetic oxidation of low-concentration gas and ventilation gas of self-backheating coal mine
03/19/2014CN103643985A Gimbal fixing device of drilling port dust suction system
03/19/2014CN103643983A Fixing device for drilling port dust suction system
03/19/2014CN101915115B Protective device for mine drilling construction
03/12/2014CN203476396U Potential safety hazard preventing and controlling system for gas extraction
03/12/2014CN203476393U Automatic intrinsically-safe water drainage controller for mining
03/12/2014CN203476375U U+U type laneway ventilating system of coalface
03/12/2014CN203476223U Gas drainage drill rod with circular arc edges
03/12/2014CN102278134B Collection method and device for coal mine ventilation air methane
03/05/2014CN203463144U Automatic gas drainage controlling and monitoring system
03/05/2014CN203463143U Integral extraction device
03/05/2014CN203463050U Three-proofing device in drilling process
03/05/2014CN203463030U Three-hole tube specially used for plugging device
03/05/2014CN103615284A Novel hole sealing process of drill-rod-type gas hole sealing machine
02/2014
02/26/2014CN203452841U Automatic water draining device for coal mine gas extraction pipeline
02/26/2014CN203452840U Coal mine gas drainage structure with high-position drainage drill site and drill holes
02/19/2014CN203441525U Support type special pipe for gas drainage
02/19/2014CN203441364U Combined rotary-drilling drill for short radius deflection of coal seam penetrating hole of coal seam roof base plate
02/19/2014CN203441362U Gas-water double-way rotating seal
02/19/2014CN103590782A Under-pressure grouting hole sealing device and method for gas extraction drill air bag blocking
02/19/2014CN103590748A Multifunctional water jet nozzle and using method thereof
02/12/2014CN203430558U Air return corner gas processing system of gas collecting bin
02/12/2014CN203430557U Dust removal device for preventing gas from being ejected out of orifice
02/12/2014CN203430473U Underground hydraulic fracturing drill hole sealing device of coal mine
02/12/2014CN203430469U Double-umbrella shaped retaining type hole strengthening device
02/12/2014CN103573288A Pneumatic negative pressure drainage device
02/12/2014CN103573285A Cylindrical mining method for three-low coal bed to extract coal bed methane
02/12/2014CN102635391B Method for preventing and controlling gas outburst
02/12/2014CN102562156B Automatic concentration adjusting and controlling early warning method for underground gas extraction pipelines and system of automatic concentration adjusting and controlling early warning method
02/05/2014CN103557026A Method for removing upper corner gas based on pipe-jacking tunneling device
02/05/2014CN102392675B Method and device for collecting ventilation air methane on top of diffuser of main fan of coal mine
01/2014
01/29/2014CN203412619U 瓦斯抽放系统 Gas Drainage System
01/29/2014CN103542889A Gas drainage multi-parameter measuring device
01/29/2014CN103541710A Method for forcedly draining gas from underground gas and liquid alternate phase-drive fracture coal of coal mine
01/29/2014CN103537146A Slag removal device for gas pipeline
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