| 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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| 04/18/2012 | CN202195180U 不锈钢加强筋螺旋焊管 Spiral welded steel reinforcement |
| 04/18/2012 | CN202194685U Automatic drainage device for gas drainage |
| 04/18/2012 | CN202194679U 自平衡水封式防爆器 Self-balancing seal explosion-proof device |
| 04/18/2012 | CN102418549A Technical method for extracting coalbed methane from constructed coal development area |
| 04/18/2012 | CN102418477A 矿井瓦斯抽放钻杆直线钻进器及其操作方法 Mine gas drainage drilling drill straight line and its method of operation |
| 04/11/2012 | CN202187795U 抽采瓦斯叶片旋流式稀释混合器 Drained gas dilution mixer blade swirl |
| 04/11/2012 | CN202187794U 抽采瓦斯稀释混合除雾器 Drained gas dilution mixed defogger |
| 04/11/2012 | CN202187791U 煤矿瓦斯防爆器 Coal mine gas explosion device |
| 04/11/2012 | CN202187742U 多功能一体封孔注抽器 Multifunctional sealing priming device |
| 04/11/2012 | CN102410040A 煤矿采煤工作面回风隅角的瓦斯治理方法 Coal Mine Gas Control Method Face return corner of |
| 04/11/2012 | CN102409997A 竖井揭煤与瓦斯突出煤层帷幕注浆防突方法 Shaft uncovering coal and gas outburst prevention outburst seam curtain grouting method |
| 04/11/2012 | CN102409989A 抽放钻孔集尘装置 Drainage hole dust collection device |
| 04/04/2012 | CN202181920U 瓦斯抽放器 Gas drainage device |
| 04/04/2012 | CN202181919U 钻孔过程瓦斯气收集装置 Methane gas drilling process collection device |
| 04/04/2012 | CN202181918U 用于在煤矿工作面的钻孔内埋设排瓦斯套管的装置 Face in the coal mine gas drilling casing embedded device for row |
| 04/04/2012 | CN202181917U 注射式封孔器 Injection-type sealing device |
| 04/04/2012 | CN102400705A 高突矿井煤巷掘进防突钻冲装锚机组 Lane Tunnel Coal Mine High sudden outburst prevention drill punch unit installed anchor |
| 04/04/2012 | CN102400704A 瓦斯和水抽采装置、系统及方法 Apparatus, system and method for gas and water drainage |
| 04/04/2012 | CN102400669A 钻孔加热煤层抽采瓦斯方法 Coal gas drainage drilling heating method |
| 04/04/2012 | CN101539008B 煤层气地面立体排采方法 CBM drainage method for three-dimensional ground |
| 03/28/2012 | CN202176360U 旋流式煤矿抽采瓦斯稀释混合器 Swirl coal mine gas drainage diluted mixer |
| 03/28/2012 | CN202176359U 一种瓦斯抽放封孔装置 One kind of gas drainage sealing device |
| 03/28/2012 | CN202176358U 矿井用CH<sub>4</sub>收集装置 Mine with CH <sub> 4 </ sub> collection device |
| 03/28/2012 | CN202176357U 煤矿井下瓦斯抽采管路快速联接装置 Coal mine gas drainage pipe quick coupling device |
| 03/28/2012 | CN202176355U 煤矿井下钻孔孔口降尘装置 Coal mine dust orifice drilling equipment |
| 03/28/2012 | CN202176354U 顺层钻孔防喷除尘装置 Bedding drilling BOP dust removal device |
| 03/28/2012 | CN102392680A Hole-bottom straight knife slitting device |
| 03/28/2012 | CN102392679A Comprehensive and integrative gas drainage method |
| 03/28/2012 | CN102392678A Gas drainage method combining surface and underground fracturing and permeability improvement |
| 03/28/2012 | CN102392677A Permeability improvement technology for coal bed gas reservoir cap by using three-dimensional fracture network modification |
| 03/28/2012 | CN102392676A Integrated device for separating gas, water and slag |
| 03/28/2012 | CN102392675A Method and device for collecting ventilation air methane on top of diffuser of main fan of coal mine |
| 03/28/2012 | CN102392640A Close-range thin coal layer simultaneous mining and parallel transporting method |
| 03/21/2012 | CN202170806U 构造煤发育区钻进、增透一体化装置 Tectonic coal development zone drilling, AR Integrated Device |
| 03/21/2012 | CN202169128U 除渣器及瓦斯抽采系统 Cleaner and gas drainage system |
| 03/21/2012 | CN102383831A Control device for gas-extracting pipeline |
| 03/21/2012 | CN102383830A Comprehensive outburst prevention method for outburst coal seam region |
| 03/21/2012 | CN102383829A Automatic gas diluter |
| 03/21/2012 | CN102383828A Refection reducing and outburst eliminating method for deep-hole hydraulic fracture driving gas shallow hole extraction |
| 03/21/2012 | CN102383827A Drilling safety protection device for mining |
| 03/21/2012 | CN102383826A Hole sealer and hole sealing process realized by using same |
| 03/21/2012 | CN102116167B Ground and underground three-dimensional extraction system of coal seam gas |
| 03/14/2012 | CN202165125U 新式抽气排水集成箱 The new integrated suction drainage box |
| 03/14/2012 | CN202165124U 一种煤矿瓦斯抽放自动排水控制装置 One kind of coal mine gas drainage automatic drain control device |
| 03/14/2012 | CN202165112U 新型瓦斯流量测量装置 The new gas flow measuring device |
| 03/14/2012 | CN102373956A Coal extraction single-hole monitoring method |
| 03/07/2012 | CN202159497U Device used for removing flammable gas in closed environment |
| 03/07/2012 | CN202157830U 瓦斯管路自动放水器 Gas pipeline automatically turn on the water |
| 03/07/2012 | CN202157824U 节能型变频井下移动式瓦斯抽放泵站 Energy-saving inverter underground gas drainage pumping stations mobile |
| 03/07/2012 | CN202157823U 封孔器 Sealing device |
| 03/06/2012 | CA2435221C Method and system for enhanced access to a subterranean zone |
| 02/29/2012 | CN101280667B Low helical abrasion-proof drill rod for mash gas pumping drilling construction and machining process thereof |
| 02/22/2012 | CN202148923U 一种自动分渣放水器 An automatic sub slag turn on the water |
| 02/22/2012 | CN102359391A Coal bed presplitting device |
| 02/15/2012 | CN102352769A Integrated mining method for commonly mining coal and gas of high mine |
| 02/15/2012 | CN102352768A Gas drainage method and equipment with alternative drainage |
| 02/15/2012 | CN102350150A Filter pipe for suction and discharge of biogas-containing stratum gas |
| 02/15/2012 | CN102031950B 煤层顶板梳状瓦斯抽采钻孔的成孔工艺方法 Seam roof comb gas pumped into the hole drilling process for mining |
| 02/08/2012 | CN202141919U 一种plc可编程煤矿用移动瓦斯抽放泵站免开箱控制机构 One kind plc programmable coal mine gas drainage pumping station to move out of the box-free control mechanism |
| 02/08/2012 | CN202140107U 一种乏风非密闭连接装置 One kind of non-sealed connection means VAM |
| 02/08/2012 | CN102345469A Test analog device for studying gas migration in mined-out area under different ventilation conditions |
| 02/08/2012 | CN102345439A Full-hydraulic double-rod soft coal drilling machine |
| 02/08/2012 | CN101749045B 高突矿井煤巷高效掘进瓦斯治理方法 High Outburst Mine Coal Lane efficient method of driving Gas Control |
| 02/01/2012 | CN202132070U 用于矿井孔隙充填及密闭的便携注浆系统 For mine closed pore-filling and portable grouting system |
| 02/01/2012 | CN202132065U 矿用钻孔安全保护装置 Mine drilling safety devices |
| 02/01/2012 | CN202132064U 单体式溢流水封阻火泄爆装置 Fire-piece seal overflow vent explosive device |
| 02/01/2012 | CN102337923A Control device of concentration and pressure of gas |
| 02/01/2012 | CN102337922A Method for inspecting burst-preventing effect of areas |
| 02/01/2012 | CN102337921A Gas-water separation, water discharging and slag discharge integrated device for drill hole in gas extraction crossheading drill site |
| 02/01/2012 | CN102337920A Gas and dust collecting device |
| 02/01/2012 | CN102337919A Four-period-five-purpose hole-drilling high-efficiency gas extracting process |
| 02/01/2012 | CN102337918A Twin-stage adjustable blade spiral-flow type dilution mixer for gas drainage |
| 02/01/2012 | CN102337917A Blade swirl-type dilution mixer for gas drainage |
| 02/01/2012 | CN101915411B 煤矿乏风瓦斯氧化装置汽水循环系统 Mine VAM oxidation unit soda circulatory system |
| 02/01/2012 | CN101915117B 煤矿乏风瓦斯氧化装置 Mine VAM oxidation unit |
| 02/01/2012 | CN101614135B 钻、爆、抽三位一体瓦斯抽采方法 Drilling, blasting, pumping gas drainage method Trinity |
| 02/01/2012 | CN101598030B 突出危险煤层石门快速揭煤方法 Highlight the danger uncovering coal seam Crosscut rapid method |
| 01/31/2012 | CA2503516C Method and system for circulating fluid in a well system |
| 01/25/2012 | CN202125310U Gas drainage system having automatic explosion resistance device |
| 01/25/2012 | CN202125309U Multifunctional hole packer for plugging and injection |
| 01/25/2012 | CN101418679B Method for pumping coalbed gas by heating coal bed |
| 01/18/2012 | CN202117914U Cooling device for circulated water in gas drainage pump station |
| 01/18/2012 | CN202117707U Portable quick hole-sealing bag |
| 01/18/2012 | CN202117706U Multifunctional mashgas flow-transferring box |
| 01/18/2012 | CN202117705U Water cutting device for converting high pressure and low pressure |
| 01/18/2012 | CN202117704U High pressure prepositive water braid |
| 01/18/2012 | CN202117703U Reinforced concrete pipe for discharging gas in roof gas tail roadway |
| 01/18/2012 | CN102322288A Self-expanding gas hole sealer |
| 01/18/2012 | CN102322287A Gas drainage, dilution and mixing demister |
| 01/18/2012 | CN102134965B Long positioned drill hole drilling tool for extracting gas from coal seam roof and construction method thereof |
| 01/11/2012 | CN202108414U High-pressure post-positioned water swivel |
| 01/11/2012 | CN102312678A Digital blow-out preventing extraction on-line monitoring system for coal mine |
| 01/11/2012 | CN102312661A Drilling gas blow-out preventing system |
| 01/04/2012 | CN202100275U Coal mine ventilating gas continuous countercurrent catalytic oxidation device |
| 01/04/2012 | CN202096885U Multistage backheating type low-concentration gas heat reflux catalytic oxidation device |
| 01/04/2012 | CN102305097A Automatic water drainage slag remover in gas drainage |
| 12/28/2011 | CN202090948U 矿井瓦斯抽采管路气控自动排渣放水器 Mine gas drainage pipeline gas control automatic slagging turn on the water |
| 12/28/2011 | CN202087159U 瓦斯抽采管路杂物过滤器 Gas drainage pipeline debris filter |
| 12/28/2011 | CN102296989A 一种自动排渣放水器 An automatic slagging turn on the water |
| 12/28/2011 | CN102296982A 一种电化学强化煤瓦斯解吸渗流的方法 An electrochemical strengthen coal gas desorption flow method |