| Patents for E21F 7 - Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose (2,187) |
|---|
| 06/15/2011 | CN101539027B Device for treating low concentration methane in ventilation air methane (VAM) of coal mine and method thereof |
| 06/08/2011 | CN201857992U Dust collector capable of preventing gas outburst |
| 06/08/2011 | CN201857955U Multiplexing type active hole-sealing pressure measuring device |
| 06/08/2011 | CN102086774A Drainage method of gas in coal bed |
| 06/08/2011 | CN101251030B Secondary hole sealing method capable of improving coal bed drilling firedamp sucking concentration |
| 06/01/2011 | CN201851152U Wind power locking device |
| 06/01/2011 | CN201851151U Flow guide pipe for gas drainage and gas acquisition device |
| 06/01/2011 | CN201851150U Drainage device of gas extraction and drainage pipe |
| 06/01/2011 | CN201851117U Quick sampling system of deep hole gas |
| 06/01/2011 | CN201851116U Positive-pressure jet spiral sampling drill bit |
| 06/01/2011 | CN201851067U Drilling anti-jet orifice device |
| 06/01/2011 | CN201851022U Abnormal boring rod used for loose and prominent coal beds |
| 06/01/2011 | CN102080526A Method for extracting gas from bedding level fractured well of ground coal seam roof |
| 06/01/2011 | CN102080525A High-pressure gas injection hole-drilling pressure-releasing outburst prevention method |
| 06/01/2011 | CN102080519A Method for extracting coal bed gas by negative pressure on ground through gas-coal simultaneous extraction |
| 06/01/2011 | CN102080518A Method for extracting gas from coal seam roof complex branched well |
| 05/25/2011 | CN201843770U Circulating water system of gas drainage pump |
| 05/25/2011 | CN201843643U Coal mine gas probe hanger |
| 05/25/2011 | CN201843633U Protection device for drilling construction of mine |
| 05/25/2011 | CN102071962A Method for sealing downward hole |
| 05/25/2011 | CN102071961A Downward gas drainage drill hole and pressure testing drill hole sealing method |
| 05/25/2011 | CN102071958A Inverse Y-shaped ventilation method for coal mining working face |
| 05/25/2011 | CN102071955A Soft outburst coal seam tunneling reserved coal body reinforcement and outburst-proof method |
| 05/25/2011 | CN102071921A Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| 05/25/2011 | CN102071920A Gas extraction equipment and method for low coal penetration layer |
| 05/25/2011 | CN102071898A Self-formed baffle and reaction type foam hole sealing device thereof |
| 05/25/2011 | CN102071886A Drill rod of double helix anti-lock drill |
| 05/18/2011 | CN201835858U Thermal oxidation generating system by adopting low-concentration gas and ventilated gas in coal mine |
| 05/18/2011 | CN102061933A Long drilling positioning construction process |
| 05/18/2011 | CN102061932A High-pressure small jet coal and gas outburst control device |
| 05/18/2011 | CN102061931A Mine polyurethane foam manually synthesized on scene |
| 05/18/2011 | CN102061919A Co-mining tunneling method of seam roadway gas |
| 05/18/2011 | CN102061918A Coal mining method for co-mining gas in mine |
| 05/11/2011 | CN201826884U Grouting and sealing machine |
| 05/11/2011 | CN201826883U Antirust air duct of gas oxidization device |
| 05/11/2011 | CN201826881U Coal mine methane delivery connecting device |
| 05/11/2011 | CN201826807U Gas drainage hole sealing device |
| 05/11/2011 | CN201826780U Drainage drilling machine provided with drill rod detaching device |
| 05/11/2011 | CN201826762U Synchronous two-way gas drill rod |
| 05/11/2011 | CN201826750U Drainage drilling machine provided with self-moving device |
| 05/11/2011 | CN201826748U Device for drilling deep and long gas drainage hole on soft coal seam in bedding way |
| 05/11/2011 | CN201823195U Flame arrester of guide plate |
| 05/11/2011 | CN102052087A Polyurethane foaming bag blocked gas drainage hole |
| 05/11/2011 | CN101915084B Process for pumping and exploiting coal bed gas by using ground well drilling and underground hole drilling |
| 05/11/2011 | CN101603431B Method for reinforcing outburst-prone coal seam cross-cut coal uncovering |
| 05/04/2011 | CN201818835U Five-way plastic valve for gas extraction drilling |
| 05/04/2011 | CN201818329U Negative pressure automatic water discharging device for gas drainage pipeline |
| 05/04/2011 | CN201818323U Gas extraction drilling linked pipe structure |
| 05/04/2011 | CN102042035A Design method for communication base stations for safety monitoring system of coal mine |
| 05/04/2011 | CN102042033A Automatic alarming and processing system for series coal mine gas |
| 05/04/2011 | CN102042027A Coal mine gas drilling drainage device |
| 05/04/2011 | CN101457654B Telescopic type pulling hole packer |
| 05/04/2011 | CN101294499B Double-function vacuum apparatus for extracting mash gas and lifting groundwater for coal mine safety |
| 05/04/2011 | CN101280688B Reagional eliminating method for drilling along the top at prominent coal heading face |
| 04/27/2011 | CN201810350U Coal mine single-hole gas measuring device |
| 04/27/2011 | CN201810335U High and low-concentration gas mixing device for coal mine gas |
| 04/27/2011 | CN201810334U Air return corner gas system utilizing compressed air spray |
| 04/27/2011 | CN201810333U Drilling, loading and anchoring all-in-one machine for outburst mine and coal roadway |
| 04/27/2011 | CN102031984A Reinforcing device for soft protruding coal bed excavated preserved coal body |
| 04/27/2011 | CN102031954A Coal and rock bore hydraulic fracture experimental apparatus |
| 04/27/2011 | CN102031950A Hole-forming process method for comb gas extraction borehole in coal seam roof |
| 04/27/2011 | CN101629491B Coal mine omnipotent gas extraction agent |
| 04/20/2011 | CN201802435U Coal mine ventilation system |
| 04/20/2011 | CN102022135A Drilling, pressing and vibrating trinity pressure-relief and outburst-prevention method |
| 04/20/2011 | CN102022134A Drilling, pressing and vibrating combined pressure-relieving coal bed gas exploitation method |
| 04/20/2011 | CN102022133A Regional gas underground high-pressure jet hole digging, pressure relief and outburst prevention method |
| 04/20/2011 | CN102022093A Reactive type foamy hole sealing system |
| 04/20/2011 | CN102022079A Outburst-prevention drilling machine on mining surface of gassy outburst coal mine and frequency conversion variable liquid-supplying self-walking pump station thereof |
| 04/20/2011 | CN101581230B High-pressure water mist generator |
| 04/20/2011 | CN101571044B Subway shield gas tunnel construction method |
| 04/20/2011 | CN101307695B Coal mine gas pre-draining borehole sealing method adopting aerated capsule as temporary hole bottom |
| 04/13/2011 | CN201794617U System for predicting outburst risk of coal and gas in mine in real time |
| 04/13/2011 | CN201794610U Drilling, loading, anchoring, supporting and transporting integrated machine in high outburst mine coal drift |
| 04/13/2011 | CN201794609U Drilling, loading and supporting all-in-one machine for coal roadway of high outburst coal mine |
| 04/13/2011 | CN201794608U Coal bed drilling safety control system |
| 04/13/2011 | CN201794607U Bag for synthesizing mining polyurethane foam on the spot |
| 04/13/2011 | CN102011606A Reaction type foam hole sealing multi-baffle sealing device |
| 04/13/2011 | CN102011605A Low-concentration gas and ventilation air methane thermal oxidation generating system and method of coal mine |
| 04/13/2011 | CN102011574A Method for increasing yield of coal bed methane through vibration |
| 04/06/2011 | CN201786385U A structure for preventing outburst of coal and gas |
| 04/06/2011 | CN201786381U Recovery device for separating and enriching gas discharged from return current system of mine |
| 04/06/2011 | CN201786380U Double-tank water seal type anti-explosion and anti-backfire device |
| 04/06/2011 | CN201786375U Air barrier for controlling underground air flow in coal mines |
| 04/06/2011 | CN201786311U Drilling gas blowout preventor |
| 04/06/2011 | CN201786257U Split-type mining deep-hole drill rig |
| 04/06/2011 | CN201786256U Abnormal protrusion mine coal road digging anti-protrusion boring jumbo loading set |
| 04/06/2011 | CN201786255U Depth drill carriage pumping station for mine |
| 04/06/2011 | CN102003201A Gas drainage method in gob of coal mine |
| 04/06/2011 | CN102003186A Double-roadway tunneling construction process |
| 04/06/2011 | CN102003173A System and method for automatically measuring and recording gas pressure during coal seam hole sealing |
| 03/30/2011 | CN201779988U Furnace lining of vertical coal mine ventilation air methane (VAM) oxygenation device |
| 03/30/2011 | CN101994519A Gas extraction hose connecting device and method |
| 03/23/2011 | CN201772964U 压力传感器 Pressure sensors |
| 03/23/2011 | CN201771542U Collecting device used in drilling hole for underground gas drainage in coal mine |
| 03/23/2011 | CN201771509U Hydraulic power self-rotation cutter |
| 03/23/2011 | CN201771438U Split type cambered surface triangle drilling rod for mining |
| 03/23/2011 | CN201771427U Outburst elimination rotary-cutting drilling device for 'three soft' coal seams |
| 03/23/2011 | CN101418702B Gas adding system of coal mine ventilation air methane oxidation device |
| 03/23/2011 | CN101403314B Coal mine down-hole drilling hydraulic fracturing anti-reflection mash gas extraction technique |
| 03/16/2011 | CN201764467U Vapour-water circulation system of coal mine ventilation air methane (VAM) oxidization device |