| Patents for E21F 7 - Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose (2,187) |
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| 07/18/2012 | CN102587959A Method for draining coal seam gas |
| 07/18/2012 | CN102587958A Method for mining coal seam gas |
| 07/18/2012 | CN102587828A Gas extraction and drilling cooperative drilling and protecting integrated system for soft coal seams and process |
| 07/18/2012 | CN101936179B Air extracting and heating coal mine ventilating gas thermal oxidizer unit |
| 07/11/2012 | CN202325674U 自动排渣放水器 Automatic slagging turn on the water |
| 07/11/2012 | CN202325631U 用于煤矿井下钻孔的气渣分离及煤层气回收装置 Slag separation and recovery of coalbed methane gas for coal mine drilling |
| 07/11/2012 | CN202325630U 矿用注胶泵 Mine plastic injection pump |
| 07/11/2012 | CN202325629U 一种利用爆炸能量集中释放增加煤层透气性的装置 A use of explosive energy focused on the release of the device to increase seam permeability |
| 07/11/2012 | CN202325628U 煤矿井下巷道式煤层瓦斯压裂设备 Coal mine roadway coal seam gas fracturing equipment |
| 07/11/2012 | CN202325627U 瓦斯抽采管路控制装置 Gas drainage pipeline control device |
| 07/11/2012 | CN202325626U Coal-seam gas drainage pipe network system |
| 07/11/2012 | CN202325614U 一种防止矿山瓦斯爆炸的应急通风装置 An emergency ventilation system to prevent mine gas explosion |
| 07/11/2012 | CN202325573U 煤巷钻孔防突装置 Coal Lane drilling outburst prevention device |
| 07/11/2012 | CN202325487U 注浆法测定煤层瓦斯压力过程中的一种泄压管 Determination of coal seam gas pressure grouting process of a pressure relief pipe |
| 07/11/2012 | CN202325375U 一种压注式聚氨酯封孔器 One kind of pressure injection-type polyurethane sealing device |
| 07/11/2012 | CN102562156A Automatic concentration adjusting and controlling early warning method for underground gas extraction pipelines and system of automatic concentration adjusting and controlling early warning method |
| 07/11/2012 | CN102562133A Device and method for sealing and drilling holes of gas drainage |
| 07/11/2012 | CN102562132A Explosion suppression digital intelligence gas drainage pump for mines |
| 07/11/2012 | CN102562131A Coal mine gas comprehensive application system and application method thereof |
| 07/11/2012 | CN102562088A Method for preventing gas from being accumulated at corners on coal faces |
| 07/11/2012 | CN102561998A Gas extraction bored well and forming method |
| 07/04/2012 | CN202306292U 一种瓦斯泵站检测监控装置主机 One kind of gas pumping station detection monitoring device hosts |
| 07/04/2012 | CN202300520U 矿用瓦斯抽放全自动放水装置 Mine gas drainage automatic drainage device |
| 07/04/2012 | CN202300519U 矿用瓦斯抽放正压放水器 Mine gas drainage positive turn on the water |
| 07/04/2012 | CN202300518U 下向抽采孔排水装置 Under the drainage hole drainage |
| 07/04/2012 | CN202300485U 除渣装置 Cleaning plant |
| 07/04/2012 | CN202300484U 开放式孔口瓦斯积聚处理装置 Open orifice gas accumulation processing device |
| 07/04/2012 | CN202300483U 套管式瓦斯抽放管 Tube type gas drainage pipe |
| 07/04/2012 | CN202300482U 抽采管及抽采系统 Drainage pipes and drainage systems |
| 07/04/2012 | CN202300481U 一种瓦斯抽放钻孔双罐封孔器 One kind of gas drainage drilling dual tank sealing device |
| 07/04/2012 | CN202300480U 一种抽放钻孔集尘装置 A drilling dust collecting means Drainage |
| 07/04/2012 | CN202300335U 地面瓦斯抽气机 Ground gas pumping machine |
| 07/04/2012 | CN102536305A Method for increasing permeability of inert gas and extracting gas |
| 07/04/2012 | CN102536304A High-pressure rotating sealed water delivery device |
| 07/04/2012 | CN102536303A Diluent for hydrogen sulfide and methane of coal layer in coal mine |
| 07/04/2012 | CN102536302A Method for relieving pressure and eliminating outburst of ground butting well |
| 07/04/2012 | CN102536301A Protective layer exploitation and gas pumping-exhaust management system and using method thereof |
| 07/04/2012 | CN102536250A Construction method for tunnels with karst and gas simultaneously |
| 07/04/2012 | CN102536158A Uphole sealing method |
| 07/04/2012 | CN101994519B Gas extraction hose connecting device and method |
| 07/04/2012 | CN101575983B Directional fracturing permeability improvement outburst elimination method in coal mine and device thereof. |
| 06/27/2012 | CN102518465A Method for pumping high-position drilling gas from high gas working face |
| 06/27/2012 | CN102518464A Method for extracting gas at corner on recovery working face in coal mine |
| 06/27/2012 | CN102518412A Method for mining coal and gas by hydraulic jet grouting washout |
| 06/27/2012 | CN101949299B Instrument signal circuit arrangement device |
| 06/20/2012 | CN102505929A Device for increasing gas permeability of coal seam by utilizing centralized release of explosion energy |
| 06/20/2012 | CN101979835B Method for preventing coal and gas burst by drill communicated coal mining exhaust |
| 06/13/2012 | CN202273704U 一种瓦斯气浓度及压力的控制装置 Control device for methane gas concentration and pressure |
| 06/13/2012 | CN102493834A Water and waste rock discharging device for extracting gas and working method thereof |
| 06/13/2012 | CN102493833A Depressurized extraction method for cutting through roof or floor of coal seam by abrasive water jet |
| 06/13/2012 | CN102493832A Method for safely generating power by aid of unstable gas sources |
| 06/13/2012 | CN102493831A Method for extracting coal seam gas through ground fracturing and underground horizontal drill holes |
| 06/13/2012 | CN102493805A Method for efficient shaft coal uncovering in high gas mine |
| 06/13/2012 | CN102493769A Swallow-tailed sliding-type wing-profile drill |
| 06/06/2012 | CN202266297U 箱式负压自动放水器 Box-type vacuum automatically turn on the water |
| 06/06/2012 | CN102486087A Gas discharging hole logging unit fixing device |
| 06/06/2012 | CN101963070B Drain device for mine gas extraction system |
| 05/30/2012 | CN202252397U Light metal tube with high ring stiffness |
| 05/30/2012 | CN202252116U Stope face gob gas drainage pipe laying three-way valve |
| 05/30/2012 | CN202250749U Suction and discharging control system for movable gas suction and discharging pump station |
| 05/30/2012 | CN202250167U Self-expansion type gas hole packer |
| 05/30/2012 | CN202250166U Secondary high-pressure grouting hole packer |
| 05/30/2012 | CN202250165U Integration device for separating gas and water and discharging water and slag for drill hole in gas extraction crossheading drill site |
| 05/30/2012 | CN202250164U Multifunctional connecting device for coal mine gas extraction drill hole |
| 05/30/2012 | CN202250163U Gas-pumping gas-water-slag separating device |
| 05/30/2012 | CN202250162U Water-level change warning device and coal mine gas extraction system |
| 05/30/2012 | CN202250161U Hole sealing device for CO2 gas extraction device |
| 05/30/2012 | CN202250160U Hole-sealing pipe and hole device for drill hole with kilometer depth |
| 05/30/2012 | CN202250138U Improved ventilation structure of ventilated drill field |
| 05/30/2012 | CN202249852U Gas blowout preventing and sprayed mist dust falling integrated device |
| 05/30/2012 | CN202249825U Outburst coal seam group crossing drilling device |
| 05/30/2012 | CN102477850A 煤层瓦斯抽采井固井方法和固井系统 Coal gas drainage wells cementing methods and cementing systems |
| 05/30/2012 | CN101832149B Method for extracting coal seam gas by underground heat injection |
| 05/30/2012 | CN101787898B Coal and gas outburst forecasting method |
| 05/30/2012 | CN101713297B Method and equipment for suppressing gas from multiple continuous explosions |
| 05/29/2012 | CA2623698C Method and system for mining hydrocarbon-containing materials |
| 05/24/2012 | WO2012065295A1 System and method for gas drainage and outburst prevention in coal seam by drill-cut linkage of long drilling hole and high pressure water jet |
| 05/23/2012 | CN202229426U Ventilation gas oxidation system capable of recycling heat energy |
| 05/23/2012 | CN202228108U Push-and-pull fixing device for carbon dioxide (CO2) gas exploitation device |
| 05/23/2012 | CN202228107U Ventilation air methane collection device at top of diffuser of main fan of coal mine |
| 05/23/2012 | CN202227987U Automatic switching water jet slotting combined type drill bit |
| 05/23/2012 | CN102465713A 用于瓦斯气体抽放的导流管及瓦斯采集装置 Diversion pipe and gas for methane gas drainage collection device |
| 05/23/2012 | CN102465712A 超长钻孔高压水射流钻割联动煤层瓦斯抽放与防突系统及方法 Bored high pressure water jet cutting linkage seam gas drainage drilling and outburst prevention system and method |
| 05/16/2012 | CN202220617U Drilling extraction hole plugging device |
| 05/16/2012 | CN202220616U Drilling extraction hole plugging device |
| 05/09/2012 | CN202215280U Automatic draining and deslagging device for gas drainage |
| 05/09/2012 | CN202215279U Coal seam presplitting device |
| 05/09/2012 | CN202215278U Gas drainage drill hole plugging device |
| 05/09/2012 | CN202215277U Gas drainage system |
| 05/09/2012 | CN202215276U Device for gas replacement with positive pressure air |
| 05/09/2012 | CN202215205U Slant long ring-shaped rack water-pumping gas production machine or pumping unit |
| 05/02/2012 | CN102434195A Rock crossing hole blowout preventor |
| 05/02/2012 | CN102434194A Gas drainage drill hole structure formed in coal layer and method for fabricating same |
| 05/02/2012 | CN102434193A Gas-water-slag separator for gas drainage |
| 05/02/2012 | CN102434192A Device and method for enhancing coal seam fracturing effect |
| 05/02/2012 | CN102434191A Spiral-flow type dilution mixer with adjustable blades for gas drainage |
| 04/25/2012 | CN102425446A 一种用于煤矿井下钻孔的气渣分离一体化临抽装置 An integrated gas residue separation for coal mine drilling temporary pumping device |
| 04/25/2012 | CN102425406A 注浆法测定煤层瓦斯压力过程中的一种泄压管 Determination of coal seam gas pressure grouting process of a pressure relief pipe |
| 04/25/2012 | CN101906989B 瓦斯分解消除液及煤矿瓦斯治理方法 Methane decomposition to eliminate fluid and coal mine gas control method |
| 04/25/2012 | CN101737077B 矿井通风瓦斯减排与综合利用装置及方法 VAM abatement and comprehensive utilization apparatus and method |