| Patents for E21D 1 - Sinking shafts (447) |
|---|
| 12/03/1987 | DE3618387A1 Process and device for removing special waste from soil, landfill sites and similar deposition sites |
| 11/10/1987 | US4705120 Drilling machine |
| 11/04/1987 | EP0243608A1 Apparatus for making a substantially vertical slot in the soil |
| 10/20/1987 | US4701073 Shaft sinking method |
| 10/15/1987 | DE3626755A1 Method and apparatus for producing a blind shaft or large mine opening |
| 03/03/1987 | US4646853 Shaft boring machine and method |
| 12/16/1986 | US4629010 Process and device for sinking wells |
| 12/02/1986 | CA1214795A1 Shaft boring machine |
| 07/01/1986 | US4597444 Method for excavating a large diameter shaft into the earth and at least partially through an oil-bearing formation |
| 06/11/1986 | EP0184460A2 Improved shaft sinking method |
| 05/20/1986 | US4589502 Earth boring apparatus |
| 05/10/1986 | CN85104730A Synthetic drilling and demolition well driving machine |
| 02/13/1986 | WO1986000955A1 Shaft boring machine and method |
| 02/05/1986 | EP0170199A2 Method of constructing a tubular subterranean hollow space |
| 01/28/1986 | CA1199944A1 Working platform for a drilling apparatus |
| 07/16/1985 | USRE31946 Process for consolidating and sealing off geological and artificially deposited rock and earth formations |
| 07/09/1985 | US4527640 Working platform for a drilling apparatus |
| 04/09/1985 | CA1185276A1 Variable diameter earth boring bit |
| 01/22/1985 | US4494617 Shaft boring machine |
| 01/22/1985 | CA1181368A1 Shaft mucker |
| 11/20/1984 | US4483403 Shaft drilling machine |
| 10/09/1984 | US4475847 Process for consolidation and sealing of geological formations and artificial beds of rock, earth, and coal |
| 08/08/1984 | EP0115426A2 Shaft boring machine |
| 08/02/1984 | WO1984002950A1 Shaft boring machine |
| 05/15/1984 | US4448270 Variable diameter earth boring bit |
| 03/13/1984 | CA1163652A1 Process for sinking of shafts |
| 02/14/1984 | US4431349 Ice-filled structure and tunnelling method for the egress and launching of deep-based missiles |
| 04/12/1983 | US4379594 Process for sinking of shafts |
| 12/28/1982 | CA1138329A1 Process for consolidating and sealing off geological and artificially deposited rock and earth formations |
| 05/05/1982 | EP0050954A1 Boring tools |
| 04/21/1982 | EP0049925A2 Hydraulic excavator for wells |
| 01/12/1982 | CA1115972A1 Method and device for building in the ground vertical walled structures starting from a subterranean conduit |
| 12/29/1981 | US4307980 Injection of a waterglass solution, polyisocyanate, and polyol, foaming, and hardening; adhesion |
| 06/23/1981 | US4274675 Shaft-sinking apparatus with milling head and central worm conveyor |
| 05/20/1981 | EP0029020A1 Method of sinking shafts and apparatus to carry out this method |
| 10/14/1980 | US4227583 Method and apparatus for sinking shafts |
| 07/29/1980 | CA1082440A1 Process for reinforcing geological formations |
| 06/19/1979 | CA1056857A1 Method and apparatus for sinking shafts |
| 01/02/1979 | US4132276 Arrangement for forming vertical or steeply inclined shafts |
| 12/19/1978 | CA1044710A1 Arrangement for widening and forming smaller, vertical or strongly inclined shafts |
| 09/12/1978 | US4113014 Polyurethanes |
| 08/22/1978 | US4107930 Method and apparatus for sinking shafts |
| 01/24/1978 | US4069760 Method for driving a shaft with shaped charges |
| 12/28/1976 | US3999616 Method and apparatus for establishing the drilling line of an overhead boring machine |
| 12/21/1976 | US3998061 Formation of cavities in the bed of a sheet of water |
| 06/29/1976 | US3965995 Machine for boring a large diameter blind hole |
| 03/16/1976 | US3943722 Ground freezing method |