| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 11/27/1990 | CA1276928C Deflection apparatus |
| 11/22/1990 | EP0398405A1 Duel jet method |
| 11/22/1990 | EP0397872A1 Well expander |
| 11/22/1990 | EP0397858A1 Apparatus for forming slit in base rock and concrete surface |
| 11/22/1990 | EP0397658A1 Ignition device for lances |
| 11/20/1990 | US4971163 Drilling bucket apparatus for cast-in-place piles with expanded bottoms |
| 11/20/1990 | US4971161 Ice auger conversion kit |
| 11/20/1990 | US4971157 Apparatus for the removal of spoil when making trenches of great depth |
| 11/20/1990 | CA1276624C Devices for drilling branched wells |
| 11/17/1990 | WO1990014200A1 Twin-jet process |
| 11/15/1990 | WO1990013729A1 High-pressure pipe string for continuous fusion drilling of deep wells, process and device for manufacturing, propelling and dismantling it |
| 11/15/1990 | CA2033068A1 High-pressure pipe string for continuous fusion drilling of deep wells |
| 11/14/1990 | EP0397323A1 Jet bit with onboard deviation means |
| 11/14/1990 | CN1010421B Reversible underground piercing device |
| 11/08/1990 | CA2014872A1 Jet bit with onboard deviation means |
| 11/07/1990 | CN1046794A Intermediate pipe-jacking apparatus |
| 11/06/1990 | CA1276007C Deflection apparatus |
| 11/01/1990 | WO1990012948A1 Mobile drilling rig |
| 10/31/1990 | EP0395167A1 Device and method for making a borehole in the ground |
| 10/31/1990 | EP0394823A1 Intermediate pipe-jacking apparatus |
| 10/31/1990 | EP0394567A1 Steerable drilling mole |
| 10/30/1990 | US4966498 Pile-forming apparatus for use in low density overburden |
| 10/30/1990 | US4966494 Low load pipe for pipe jacking |
| 10/25/1990 | DE3913313A1 Vertical column attached to hydraulic excavator - adjustable mounting for hydraulic vibration rammer and drilling machine and immediate change-over between the two |
| 10/23/1990 | US4964475 Drilling device for producing drill holes with undercut |
| 10/23/1990 | US4964474 Flexible tunneling apparatus and method |
| 10/18/1990 | WO1990012164A1 Device for making holes in the ground |
| 10/17/1990 | EP0392237A2 Self-propelled boring ram |
| 10/17/1990 | EP0391899A1 Device for steering the direction of drilling |
| 10/16/1990 | US4962822 Downhole drill bit and bit coupling |
| 10/16/1990 | US4962818 Downhole motor with an enlarged connecting rod housing |
| 10/16/1990 | CA1275239C Exothermic cutting electrode |
| 10/14/1990 | CA2014121A1 Vibratory core drill apparatus |
| 10/11/1990 | DE3911469A1 Drilling installation |
| 10/11/1990 | DE3911379A1 Pipe-jacking station for pipe-jacking operations |
| 10/11/1990 | DE3911378A1 Driving shield, in particular for use as a cutting shoe in pipe-jacking operation |
| 10/10/1990 | EP0391874A2 Flushing means for drilling tools |
| 10/10/1990 | EP0391873A2 Drilling tool |
| 10/10/1990 | EP0391669A2 Directional rod pusher |
| 10/10/1990 | EP0391161A2 Automatic ram drill device |
| 10/10/1990 | EP0390932A1 An underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same. |
| 10/09/1990 | US4961469 Drill string element |
| 10/08/1990 | WO1990012235A1 Recoverable sleeve assembly for pipe joint |
| 10/06/1990 | CA2062316A1 Eccentric drilling tool |
| 10/03/1990 | EP0389956A1 Automatic drive hammer apparatus |
| 10/03/1990 | EP0389885A1 Appliance for breaking open and depressing old pipes into the surrounding earth |
| 10/03/1990 | CN1009849B Percussing device for percussion revolution drill |
| 10/02/1990 | US4960176 Device for cutting, drilling or similar working of rock, ore, concrete or the like |
| 10/02/1990 | US4960064 Land anchor for a boat |
| 10/02/1990 | CA1274818A1 Device for simultaneously boring a well and inserting a casing string |
| 10/02/1990 | CA1274817A1 Steering and control system for percussion boring tools |
| 09/27/1990 | DE4007907A1 Lenkvorrichtung fuer eine bohrerspitze in einem bohrloch Steering device for a drill tip in a borehole |
| 09/26/1990 | EP0389454A1 Device in impact machines |
| 09/20/1990 | WO1990010778A1 A device for operations under water |
| 09/20/1990 | WO1990010372A1 Improvements in or relating to tools |
| 09/18/1990 | US4957175 Soil drilling equipment |
| 09/18/1990 | US4957173 Method and apparatus for subsoil drilling |
| 09/18/1990 | US4957172 Surveying method for locating target subterranean bodies |
| 09/13/1990 | CA2011972A1 Device for steering a drill bit |
| 09/12/1990 | EP0387218A1 Device in impact machines |
| 09/12/1990 | EP0387217A1 Device in impact machines |
| 09/11/1990 | US4955757 Hydraulic apparatus for installing piping below ground |
| 09/11/1990 | US4955439 Self-propelled subsoil penetrating tool system |
| 09/07/1990 | WO1990010173A1 Improvements relating to the lining of pipelines or passageways |
| 09/07/1990 | WO1990010140A1 Device for manipulation control of a movable object |
| 09/05/1990 | CN2061601U Suction drilling machine |
| 09/04/1990 | US4953638 Method of and apparatus for drilling a horizontal controlled borehole in the earth |
| 09/04/1990 | US4953637 Apparatus for recovering ground soil samples |
| 09/04/1990 | US4953636 Electrical conductor arrangements for pipe system |
| 09/04/1990 | US4953626 Ram boring machine having a pull-and-turn reversing gear |
| 09/04/1990 | CA1273624A1 Device for submerged drilling of foundations |
| 09/04/1990 | CA1273563A1 Method and device for detecting a fluid flow |
| 08/30/1990 | DE3905648A1 Pipe ram |
| 08/30/1990 | DE3905596A1 Mobile drilling rig |
| 08/29/1990 | EP0301060B1 Device for opening gas sources in refuse tips, and for exploring and cleansing materials for recycling and contaminated ground |
| 08/29/1990 | EP0271566B1 Riser tensioner |
| 08/28/1990 | US4951760 Remote control actuation device |
| 08/22/1990 | EP0383225A1 Device for the detachable connection of a rotary table to a drill pipe |
| 08/21/1990 | US4949795 Rotary rapid excavation system |
| 08/16/1990 | EP0382607A1 Device for forming piles in the soil using a continuous hollow screw |
| 08/16/1990 | DE3909224C1 Thrust-boring slide for accommodating a conventional horizontal drilling implement |
| 08/14/1990 | US4948925 Apparatus and method for rotationally orienting a fluid conducting conduit |
| 08/14/1990 | US4947944 Device for steering a drilling tool and/or drill string |
| 08/14/1990 | US4947943 Fisherman's gear-storing ice auger |
| 08/14/1990 | US4947534 Apparatus and method for salvaging concentric piping members |
| 08/09/1990 | DE3927044C1 Supply pipe laying equipment - incorporates vibrating bit head and conical tip to displace soil |
| 08/08/1990 | EP0380910A2 Method and apparatus for horizontal drilling |
| 08/08/1990 | EP0380909A2 Method and coring apparatus for subterranean rock drilling |
| 08/08/1990 | EP0380893A1 Drilling assembly with an actuator, a motor and control means |
| 08/07/1990 | US4946312 Apparatus for opening up garbage dumping ground gas sources and for the exploration and sanification of old deposit site burdens and contaminated soils |
| 08/07/1990 | US4945999 Directional rod pusher |
| 08/01/1990 | EP0379743A1 Method for cleaning soil by conducting through a heated medium |
| 08/01/1990 | EP0379707A2 Pneumatic pipe-expanding device |
| 08/01/1990 | CA2008977A1 Method and apparatus for horizontal drilling |
| 08/01/1990 | CA2008975A1 Method and apparatus for directional coring |
| 07/31/1990 | US4944634 Lubricating tunnel walls around pipe to be installed with aqueous slurry of smectite clay and magnesium oxide |
| 07/31/1990 | US4944211 Mass action driver device |
| 07/26/1990 | WO1990008243A1 Manhole cutter |
| 07/26/1990 | DE3902127A1 Wagon drill with laser-orientated control |
| 07/25/1990 | EP0379187A1 Method of pulling outer tubings |