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)
11/2010
11/17/2010CN101886531A Drilling and sealing method for gas drainage from coal seam
11/10/2010CN201627535U Secondary reaming drainage bit
11/10/2010CN101881176A Method for reducing gas density by using ultra-high-pressure and ultra-fine water mist
11/10/2010CN101881150A Hydraulic cutting nozzle with residue filer device
11/10/2010CN101881149A Heat injection drilling and sealing method of heating coalbed
11/03/2010CN201620911U Air and water ejector for coal mine downhole gas
11/03/2010CN1924286B Hydraulic gripper for gas extraction, drainage and discharge driller
10/2010
10/20/2010CN201610767U 瓦斯预警与人员控制系统 Gas warning and control system
10/20/2010CN201610761U 通用型气动式自动放水装置 Universal pneumatic type automatic drainage device
10/20/2010CN201610760U 自动放水装置 Automatic drainage device
10/20/2010CN101864985A Gas diluter
10/13/2010CN201606105U 一种矿用瓦斯抽放集流器 One kind of mine gas drainage collector
10/13/2010CN201606104U 自动放水装置 Automatic drainage device
10/13/2010CN201606039U 石油气采排装置 LPG mining discharge device
10/13/2010CN201606033U 切割压力控制器 Cutting pressure controller
10/13/2010CN101858228A Continuous prediction method of gas emission dynamic characteristic outburst of tunneling surface
10/13/2010CN101858227A Device for intensively and fast draining water in downward drainage drill hole
10/06/2010CN201599051U 提高瓦斯抽放量的装置 Increase volume of gas pumping device
10/06/2010CN201599050U 负压自动放水装置 Negative automatic drainage device
10/06/2010CN201598981U 压风排渣打钻装置 Standard Chartered drilling apparatus pressure air discharge
09/2010
09/29/2010CN201593445U Gas drainage hole packer
09/29/2010CN201593444U Device for discharging gas accumulated on upper corner of coal-mining working face
09/29/2010CN101845963A Efficient and energy-saving automatic discharge system for mine gas
09/29/2010CN101845960A Ventilation air methane countercurrent oxidation device with flue gas suction device
09/22/2010CN101839472A Method for reclaiming heat of ventilated gas oxidation device
09/15/2010CN201581927U Water drainage system based on downward drainage borehole
09/15/2010CN201581919U Mining rapid high-pressure anti-skid injection and extraction device
09/15/2010CN201581918U Coal mine composite gas mixing device
09/15/2010CN201581917U Novel water-coal discharger of gas forepumping pipeline
09/15/2010CN201581806U Coal face projection prevention hydraulic drill system
09/15/2010CN101832441A Changeable by-pass pipe fitting of underground gas extraction pipe and installation method
09/15/2010CN101832149A Method for extracting coal seam gas by underground heat injection
09/15/2010CN101029576B Method and apparatus for protruding hazadous coal-bed safety guide-jet drilling
09/08/2010CN201574898U Manual dual-liquid grouting pump
09/08/2010CN201574775U Dust reducing device for gas drainage hole in coal mine
09/08/2010CN101824999A Technology for measuring gas pressure of coal bed by utilizing through beds hole
09/08/2010CN101824982A Coal bed gas drainage effective radius measuring method
09/08/2010CN101294500B Heavy pressure slip-casting hole-sealing method for large-diameter extraction borehole
09/01/2010CN201568076U Drilling hole sealing device in highly gassy mine
09/01/2010CN201568075U Hole sealing air-charging device
09/01/2010CN101818650A Coal-mine gas CO gas recovering device
09/01/2010CN101408112B Low concentration gas thermal convection buoyancy lift collecting device
08/2010
08/25/2010CN201560795U Apparatus for controlling dust with wind as medium during boring construction for gas drainage
08/25/2010CN101813002A Coal seam pre-splitting method based on gas extraction
08/25/2010CN101813001A Multifunctional gas drainage hole packer
08/18/2010EP1354124B1 Method and system for enhanced access to a subterranean zone
08/18/2010CN201554492U Gas drainage branch-pipe connected component
08/18/2010CN201554491U Coal mine gas pump drainage device
08/18/2010CN201554490U Automatic pressure release warning device for coal mine gas drainage pipe
08/18/2010CN101806224A Method for predicting extraction productivity of underground coal-seam gas
08/11/2010CN201548538U Gas drainage detector and water remover thereof capable of removing water automatically
08/11/2010CN201546755U Methane gas emission structure for highly gassy mine coal bed tunnel
08/11/2010CN201546632U All-hydraulic outburst-prevention gas front hole drainage drilling machine
08/11/2010CN101245706B Three-dimensional simulated experiment bench for coal and mash gas co-extraction
08/11/2010CN101139933B Mining gas discharging multi-parameter measuring instrument having negative pressure compensating function
08/05/2010WO2010087738A1 Well jet pumping assembly for degassing coal beds
08/05/2010WO2010085835A1 System and method for mitigating at least one component from a fluid stream
08/04/2010CN201539277U Automatic water drainage device on splitter in gas drainage system of coal mine
07/2010
07/28/2010CN201535399U 煤矿井下抽放瓦斯用聚氯乙烯软管 Coal mine gas drainage PVC hose
07/28/2010CN1947816B Large section single opening tunnel explosion suppression and fire-extinguishing method
07/28/2010CN101787987A Fan blades of integral mine fan and preparation method thereof
07/28/2010CN101787898A Coal and gas outburst forecasting method
07/28/2010CN101787897A System and method for predicting coal and gas outburst risk of mine in real time
07/21/2010CN201531276U Device for tracking and early warning outburst hazard of mine coal and gas in real time
07/21/2010CN101781989A High-gas mine crossheading echelon short-drainage rapid tunneling process
07/15/2010US20100175334 Mine haven
07/14/2010CN201526337U Rapid compressed air hole sealer
07/08/2010DE102007046268B4 Verfahren und Einrichtung zur Befüllung und Entleerung von Kavernen Method and apparatus for filling and emptying of caverns
07/07/2010CN201521317U Portable V30 gas outburst prediction instrument
07/07/2010CN201521316U Coal bed down hole water draining, extracting and discharging device
07/06/2010CA2502698C Drill head steering
06/2010
06/24/2010WO2010069185A1 A method for destroying coal mine low concentration methane gas and an apparatus thereof
06/23/2010CN201513200U Negative-pressure adjustable low-position water-inflow large-displacement automatic slag discharging and water draining device
06/23/2010CN101749045A High-efficiency tunneling gas control method for high outburst mine coal roadway
06/23/2010CN101749044A Intelligent movable gas pumping station for mine
06/23/2010CN101749017A Outburst prevention technique for multiple heading in coal mine
06/16/2010CN201507322U Device for preventing gas reflux
06/16/2010CN101737077A Device and method for mine ventilation gas emission reduction and comprehensive utilization
06/09/2010CN201502396U High-pressure water jet outburst prevention and permeability improvement system for mining
06/09/2010CN101726572A Gas drainage detection device and water removing device capable of automatically draining water
06/09/2010CN101725777A Coal mine underground rubber hose for drawing out methane and preparation method thereof
06/09/2010CN101725367A Ventilation air inlet rectifier of mine ventilation gas processing device
06/02/2010CN101718212A Device for tracking and early warning outburst danger of mine coal and gas in real time
06/02/2010CN101251029B Secondary hole sealing device for firedamp taking-out discharging drilling
05/2010
05/26/2010CN201486589U Automatic water drainage device for coal-mine gas extraction pipe
05/26/2010CN201486466U Trestle column type double-arrangement hydraulic outburst-prevention drill
05/26/2010CN101713297A Method and equipment for suppressing gas from multiple continuous explosions
05/19/2010CN201474721U Tunneller outburst-prevention monitoring security manipulation cabin
05/19/2010CN201474720U Extraction device of mine gas
05/19/2010CN101050696B Bag type paste injection hole sealing device and its hole sealing method
05/12/2010CN201460960U Drainage device for colliery gas extracting system
05/12/2010CN201460959U Mine gas pumping and discharging hole packer
05/12/2010CN201460948U Coal mine return air and dust absorption ventilation pipe
05/12/2010CN101705836A Jet control device and method
05/05/2010CN201448119U Compound-net type anti-backfire device
05/05/2010CN101701525A Fully automatic gas explosion proof equipment
04/2010
04/28/2010CN1563664B Well of coal-bed gas
04/28/2010CN101699033A Device for pumping and draining water from downward hole of coal bed
04/21/2010CN101696637A Coal and gas separation bin and method thereof
04/14/2010CN201437732U Power system for explosion-proof trackless gas tunnel transport machine
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