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)
07/2006
07/19/2006CN2797636Y Gas discharging apparatus of multiple drilling machines
07/12/2006CN1800585A Coal mine gas explosion preventing method
06/2006
06/23/2006CA2531462A1 Mobile catch tank and flare stack
06/21/2006CN2789414Y Coal mine gas exhausting and discharging apparatus
06/14/2006DE102004058983A1 Fumes analysis system for application with fires in coal mines has underground remote controlled analyzing device provided with controllers
06/14/2006CN2787839Y Multi-source information gas monitoring instrument
06/07/2006CN2786282Y Coal mine gas explosion preventing device
05/2006
05/24/2006CN1776196A Method and system for accessing subterranean deposits from the surface
05/11/2006US20060096755 Method and system for accessing subterranean deposits from the surface
05/03/2006EP1440220B8 An entry well with slanted well bores and method
04/2006
04/27/2006CA2584729A1 A tunnel cover for a tunnel for controlled ventilation of gas
04/26/2006EP1552103A4 Drill head steering
04/11/2006US7025154 Method and system for circulating fluid in a well system
04/05/2006CN2769522Y Gas discharging life-saving pipe
03/2006
03/14/2006CA2239734C Fluid drilling system
02/2006
02/15/2006CN2758433Y Tracked walking type drill
02/01/2006EP1440220B1 An entry well with slanted well bores and method
02/01/2006CN1727636A Method and system for accessing subterranean deposits from the surface
01/2006
01/25/2006EP1619352A1 Method and system for accessing subterranean deposits from the surface
01/11/2006CN1720386A Method and system for circulating fluid in a well system
01/05/2006US20060000644 Drill head steering
12/2005
12/28/2005CN1714223A Drill head steering
12/20/2005US6976533 Method and system for accessing subterranean deposits from the surface
11/2005
11/29/2005US6969123 Upgrading and mining of coal
11/24/2005US20050257962 Method and system for circulating fluid in a well system
11/15/2005US6964298 Method and system for accessing subterranean deposits from the surface
11/09/2005EP1131535B1 Method and system for accessing subterranean deposits from the surface
09/2005
09/14/2005EP1573170A1 Method and system for circulating fluid in a well system
08/2005
08/16/2005US6929330 Method and system for mining hydrocarbon-containing materials
08/11/2005DE102004003486A1 Verfahren zur Gewinnung von Grubengas in nicht unmittelbar durch den Bergbau beeinflussten Gebirgsbereichen Process for the recovery of firedamp in not directly affected by mining mountain areas
08/10/2005CN1651715A Method of entering target geologic body and system
08/04/2005WO2005071226A1 Method for extracting a mine gas in areas which are not directly influenced by mining
08/03/2005CN1648414A Method for preventing mine lane gas from explosion and device for realizing said method
08/02/2005CA2447254C Well cavity positioning method
07/2005
07/13/2005EP1552103A1 Drill head steering
06/2005
06/30/2005DE202005006529U1 Methane drainage pipes for coal seams, used in mining operations, combines rolling ring seal with catches, allowing pipes to be simply pushed together for sealing and attachment
06/28/2005CA2441667C Method and system for accessing subterranean deposits from the surface
05/2005
05/25/2005CN2702057Y Mine gas exhaust device
04/2005
04/05/2005CA2167181C Highwall mining system
03/2005
03/30/2005CN1601055A Caterpillar chain stepped type drilling machine
03/22/2005US6869147 Method and system for mining hydrocarbon-containing materials
03/15/2005US6866106 Fluid drilling system with flexible drill string and retro jets
03/09/2005CN2683854Y Down-hole gas sucking releasing machine
02/2005
02/10/2005WO2005012688A1 Method and system for accessing subterranean deposits from the surface and tools therefor
02/08/2005CA2441672C Method and system for accessing subterranean deposits from the surface
02/08/2005CA2441671C Method and system for accessing subterranean deposits from the surface
12/2004
12/29/2004CN2667164Y Pressure releasing automatic water discharger
11/2004
11/17/2004CN2656639Y Automatic slag discharge water drain device
11/17/2004CN1546843A Method for separating coal mine gas
11/10/2004CN2654861Y Gas exhausting air duct airflow controller
11/04/2004WO2004094782A1 Slot cavity
10/2004
10/21/2004US20040206493 Slot cavity
10/06/2004CN1534164A Low premeability high gas soft thick coal layer remote pressure relief gas exhausting method
09/2004
09/29/2004CN1532374A Method for pumping out gas from mining coal layer roof
09/01/2004CN1525042A Method of simplified advance wall type coal mining, gas collection and drainage
08/2004
08/05/2004US20040149432 Method and system for accessing subterranean deposits from the surface
07/2004
07/22/2004WO2004061267A1 Method and system for circulating fluid in a well system
06/2004
06/30/2004CN1509369A Method and system for enhanced access to subterranean zone
06/10/2004US20040108110 Method and system for accessing subterranean deposits from the surface and tools therefor
05/2004
05/11/2004US6732792 Multi-well structure for accessing subterranean deposits
04/2004
04/29/2004WO2004035984A1 Drill head steering
04/15/2004US20040070257 Method and system for mining hydrocarbon-containing materials
03/2004
03/25/2004US20040055787 Method and system for circulating fluid in a well system
02/2004
02/19/2004US20040031609 Method and system for accessing subterranean deposits from the surface
02/10/2004US6688388 Method for accessing subterranean deposits from the surface
02/10/2004CA2350504C Method and system for accessing subterranean deposits from the surface
01/2004
01/20/2004US6679322 Method and system for accessing subterranean deposits from the surface
12/2003
12/30/2003US6668918 Method and system for accessing subterranean deposit from the surface
10/2003
10/22/2003EP1354124A1 Method and system for enhanced access to a subterranean zone
09/2003
09/18/2003US20030173085 Upgrading and mining of coal
09/04/2003US20030164253 Fluid drilling system
07/2003
07/29/2003US6598686 Method and system for enhanced access to a subterranean zone
06/2003
06/04/2003EP1316673A2 Method and system for accessing subterranean deposits from the surface
05/2003
05/13/2003US6561288 Method and system for accessing subterranean deposits from the surface
04/2003
04/29/2003US6554368 Method and system for mining hydrocarbon-containing materials
02/2003
02/27/2003US20030038526 Method and system for mining hydrocarbon-containing materials
02/26/2003CN2537818Y Anti-coal and gas projecting cutting drill rod in coal mine
12/2002
12/24/2002US6497457 Drilling, image, and coal-bed methane production ahead of mining
12/12/2002US20020185906 Drilling, image, and coal-bed methane production ahead of mining
11/2002
11/12/2002US6478085 System for accessing subterranean deposits from the surface
10/2002
10/29/2002US6470978 Fluid drilling system with drill string and retro jets
10/17/2002US20020148647 Method and system for accessing subterranean deposits from the surface
10/17/2002US20020148613 Method and system for accessing subterranean deposits from the surface
10/17/2002US20020148605 Method and system for accessing subterranean deposits from the surface
09/2002
09/26/2002US20020134546 Method and system for accessing subterranean deposits from the surface
08/2002
08/27/2002US6439320 Wellbore pattern for uniform access to subterranean deposits
08/01/2002WO2002059455A1 Method and system for enhanced access to a subterranean zone
07/2002
07/25/2002US20020096336 Method and system for surface production of gas from a subterranean zone
05/2002
05/08/2002CN2490318Y Portable gas drawing-off detector
03/2002
03/19/2002US6357523 Drainage pattern with intersecting wells drilled from surface
03/14/2002US20020030398 Method and system for mining hydrocarbon-containing materials
02/2002
02/27/2002CN1079879C Drilling device, drilling system and drilling method
01/2002
01/31/2002US20020011357 Fluid drilling system with drill string and retro jets
01/30/2002CN1333858A Method and system for accessing substerranean deposits from the surface
10/2001
10/18/2001WO2001077490A1 Underground mining sampler
10/10/2001CA2305960A1 Underground mining sampler
09/2001
09/20/2001WO2001069042A1 Method and system for mining hydrocarbon-containing materials
09/12/2001EP1131535A2 Method and system for accessing subterranean deposits from the surface
08/2001
08/28/2001US6280000 Method for production of gas from a coal seam using intersecting well bores
08/23/2001US20010015574 Method and system for accessing subterranean deposits from the surface
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