| Patents for E21D 1 - Sinking shafts (447) |
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| 02/05/2004 | DE10206974B4 Verfahren zur Erstellung eines Schachtbauwerkes, eines Vortriebsschachtes oder eines Start- oder Zielschachtes und Schachtbauwerk Process for the preparation of a manhole structure, a driving shaft or a departure or arrival shaft and shaft structure |
| 12/04/2003 | DE20220568U1 Shuttering system used for sinking vertical shaft in ground uses set of elongated rectangular shuttering panels with their long edges vertical and fastened together |
| 10/21/2003 | CA2040716C Mine shaft sinking |
| 08/06/2003 | CN1434191A Bore construction method by bore explosion |
| 05/15/2003 | WO2003040523A1 Method of constructing underground gallery by using pneumatic transfer system, and stratum disposal method |
| 05/15/2003 | CA2466208A1 Method of constructing underground gallery by using pneumatic transfer system, and stratum disposal method |
| 05/14/2003 | CN1108435C Anti-leakage compound wall of freeze well and its construction method |
| 09/26/2002 | WO2002075115A1 A method of sinking a shaft |
| 10/24/2001 | CN1318684A Forced homogenized air channel for tunnel |
| 03/21/2001 | CN1063515C Borehole boring method and machine |
| 11/29/2000 | CN1059012C Technology for quickly resuming normal construction after wellhole submergel by sudden water |
| 10/18/2000 | CN1270271A Anti-leakage compound wall of freeze well and its construction method |
| 10/03/2000 | US6125948 Soil sampling device with frangible section |
| 05/10/2000 | EP0999340A2 Soil sampling device |
| 05/10/2000 | CN1052291C Excavator for vertical bores |
| 03/16/2000 | DE19859666A1 Device for removal of gravel and soil from the water filled drill hole, comprising of case, container with back pressure flap at bottom, and vacuum creating piston element |
| 03/01/2000 | CN1049945C Construction method for big diam deep-well |
| 02/09/2000 | CN1049272C Sealing shaft sinking method |
| 08/18/1999 | CN1225974A Technology for quickly resuming normal construction after wellhole submerged by sudden water |
| 08/05/1999 | DE19803074A1 Shaft for buried pipelines etc. made of adjoining wall segments |
| 05/26/1999 | CN1043483C Open caisson method of inclined shaft |
| 01/27/1999 | CN2305488Y Hole enlarging device for filling pile |
| 12/30/1998 | CN2302337Y Self-sinking type light well points apparatus |
| 12/16/1998 | CN2300284Y High elasticity inner ventilation health care shoes |
| 11/11/1998 | CN1198502A Boring device and torque support for boring device |
| 08/25/1998 | US5797202 Vertical hole excavating machine |
| 08/04/1998 | US5787983 Methods of delaying well destruction due to subsidence |
| 07/29/1998 | EP0855490A2 Drilling apparatus and downhole torque generator |
| 07/15/1998 | CN1187575A Large diameter pile slip wall holing technique |
| 07/08/1998 | EP0852282A2 Method of constructing a well |
| 07/03/1998 | CA2225762A1 Methods of delaying well destruction due to subsidence |
| 06/30/1998 | CA2156566C Method and apparatus for developing shafts using small diameter shafts |
| 06/25/1998 | DE19652683A1 Heat transfer test method for freezer pipes used in earth icing when strengthening ground, e.g. in tunnel building |
| 03/24/1998 | US5730550 Method for placement of a permeable remediation zone in situ |
| 12/10/1997 | CN1036674C Vertical shaft wall circular supporting type sinking equipment and construction method |
| 10/29/1997 | CN1163340A Quick construction technology for manually digging hole filling pile of building foundation |
| 10/08/1997 | CN1161403A Method for deep drilling hole and floating down pipe |
| 06/11/1997 | CN1151782A Excavator for vertical bores |
| 06/04/1997 | EP0777032A1 Excavator for vertical bores |
| 05/21/1997 | CN1150210A Sealing shaft sinking method |
| 12/04/1996 | CN2241768Y Hammering grab bucket drilling device |
| 11/20/1996 | CN2240608Y Omnibearing hydraulic anchoring-bolt drill |
| 11/20/1996 | CN1136126A Borehole boring method and machine |
| 11/06/1996 | EP0741227A2 Borehole boring method and machine |
| 10/09/1996 | EP0736665A2 Construction of holes and tunnels having support walls |
| 05/07/1996 | US5513903 Method and apparatus for developing shafts using small diameter shafts |
| 04/17/1996 | CN1120628A Multifunctional self-walking driller |
| 02/29/1996 | WO1996006262A1 Excavator for vertical bores |
| 01/23/1996 | CA2007070C Dry pneumatic system for hard rock shaft drilling |
| 10/25/1995 | CN1110753A Open caisson method of inclined shaft |
| 10/24/1995 | US5460073 Method and apparatus for feeding hoses into mining boreholes and the like |
| 07/18/1995 | CA2118988C Non-entry method of underground excavation in weak or water bearing grounds |
| 04/28/1995 | CA2134389A1 Method and apparatus for feeding hoses into mining boreholes and the like |
| 01/10/1995 | US5380127 Non-entry method of underground excavation in weak or water bearing grounds |
| 11/22/1994 | US5366029 Large shaft over-reamer apparatus and method |
| 05/10/1994 | CA1329399C Method and machine for constructing shafts |
| 11/03/1993 | CN1078016A Apparatus for sinking shaft and its job practice |
| 09/30/1993 | DE4209695A1 Displacement method of excavating tunnel - mixes displaced soil with liq. and then subjects it to pressure to form tunnel wall. |
| 09/08/1993 | CN1076003A Shaft drilling and making technology in large thick loose gravel layer |
| 05/11/1993 | CA1317604C Device for evacuating excavated material for making deep tranches |
| 04/06/1993 | US5199515 Dry pneumatic system for hard rock shaft drilling |
| 03/11/1993 | DE4129481A1 Shaft boring machine for sinking shafts from pilot holes - has drive unit activating drilling head with inner kelly and roller cutters on radial arms |
| 09/16/1992 | EP0503309A1 Method for accelerated freezing of soil |
| 09/16/1992 | CN1018272B Well drilling and finishing process for radial wells inside well |
| 08/19/1992 | CN1063740A Shaft and raise construction method |
| 06/30/1992 | US5125692 Dry pneumatic system for hard rock shaft drilling |
| 06/10/1992 | CN1061828A Punch-grab boring machine with automatic opening-closing and connecting-disconnecting functions |
| 03/12/1992 | DE4028596A1 Equipment for sinking shafts - uses widening tool fixed to supporting and guiding tube which is inserted in pilot hole |
| 03/05/1992 | DE4126426A1 Reset moment free roller or disc drill head - has motor and drill on common mounting in direct drive contact |
| 09/24/1991 | US5051032 Method and apparatus for continuously excavating shaft and tunnel |
| 08/20/1991 | US5040421 Measuring method of fluctuations of ground and its apparatus |
| 07/31/1991 | EP0438920A1 Dry pneumatic system for hard rock shaft drilling |
| 06/19/1991 | EP0432901A1 Method and apparatus for excavating a shaft and tunnel |
| 06/11/1991 | US5022789 Method and machine for constructing shafts |
| 05/15/1991 | EP0427288A2 Method for measuring fluctuations of ground, and apparatus therefore |
| 05/08/1991 | CN1051225A Well drilling and finishing process for radial wells inside well |
| 11/22/1990 | DE3916475A1 Verfahren und vorrichtung zur herstellung eines schachtes, insbesondere fuer den bergbau Method and device for manufacturing a shaft, especially for the mining |
| 11/20/1990 | US4971157 Apparatus for the removal of spoil when making trenches of great depth |
| 09/11/1990 | CA1273965A1 Method and device for drilling a well |
| 08/21/1990 | US4950034 Shaft excavation method |
| 05/23/1990 | EP0369606A1 Shaft excavation system |
| 03/14/1990 | CN2054485U Data gathering instrument for freeze sinking |
| 01/31/1990 | EP0353152A1 Device for withdrawing dug material for making deep trenches |
| 10/19/1989 | DE3832843C1 Device for supplying a charging-oxygen mixture to a smelting furnace |
| 09/26/1989 | CA1259980A1 Shaft sinking rig |
| 08/29/1989 | US4860837 Rotary and reciprocating drilling machine |
| 08/08/1989 | US4854402 Shaft sinking rig |
| 06/01/1989 | DE3740258A1 Shaft-sinking apparatus |
| 05/24/1989 | EP0316931A2 Machine for constructing shafts |
| 01/25/1989 | EP0300874A1 Machine for drilling by way of rotation and by alternating rotation |
| 12/28/1988 | CA1247383A Mineshaft closures |
| 11/22/1988 | US4785559 Excavator for making a substantially vertical slot in the ground |
| 11/03/1988 | DE3712888A1 Shaft sinking with explosive driving |
| 07/05/1988 | CA1238926A1 Shaft boring machine and method |
| 06/30/1988 | DE3643497A1 Device for sinking or widening shafts |
| 06/01/1988 | DE3641938A1 Shaft-boring appliance |
| 05/17/1988 | US4744425 Apparatus for excavating a substantially vertical slot |
| 04/13/1988 | CN85104730B Synthetic drilling and demolition well driving machine |
| 03/22/1988 | US4732226 Drilling machine |
| 03/15/1988 | CA1234167A1 Earth boring apparatus |