| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 04/12/2001 | WO2001025587A1 Assembly and method for locating lateral wellbores |
| 04/12/2001 | WO2001025586A1 Steerable drill string |
| 04/12/2001 | WO2001025585A2 Guidable land-based rocket |
| 04/12/2001 | WO2001016457A9 Method and apparatus for intersecting downhole wellbore casings |
| 04/12/2001 | WO2000052294A3 Drill head for directional boring |
| 04/12/2001 | DE19946587A1 Device for directional drilling has housing at boring head which has mounting for axially movable piston and drive for generation of blows on boring head |
| 04/11/2001 | EP1044314A4 Drilling system including eccentric adjustable diameter blade stabilizer |
| 04/10/2001 | US6213229 Drilling motor drill bit reaming stabilizer |
| 04/10/2001 | US6213226 Directional drilling assembly and method |
| 04/10/2001 | US6213215 System, vessel, seabed installation and method for producing oil or gas |
| 04/10/2001 | US6213205 Pressure activated bendable tool |
| 04/10/2001 | CA2156984C Decentralizing, centralizing, locating and orienting subsystems and methods for subterranean multilateral well drilling and completion |
| 04/05/2001 | WO2001023711A1 Ground reinforcing method |
| 04/05/2001 | WO2001023706A1 Re-entry in multilateral wellbores |
| 04/05/2001 | DE19947493A1 Method to manufacture underground pipeline; involves advancing pipe elements through bore hole from starting pit and inserting sub-construction through pipe elements to connect elements |
| 04/04/2001 | EP1088961A1 Method for trenchless replacement of underground conduits |
| 04/04/2001 | EP1088151A1 Downhole milling device |
| 04/04/2001 | EP0852652A4 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access |
| 04/04/2001 | CN2426006Y Moveable sealing device |
| 04/03/2001 | US6209665 Reverse circulation drilling system with bit locked underreamer arms |
| 04/03/2001 | US6209664 Device and method for controlling the trajectory of a wellbore |
| 04/03/2001 | US6209660 Drill bit shear relief for horizontal directional drilling of rock formations |
| 04/03/2001 | US6209648 Method and apparatus for connecting a lateral branch liner to a main well bore |
| 04/03/2001 | US6209645 Method and apparatus for accurate milling of windows in well casings |
| 04/03/2001 | US6209644 Assembly and method for forming a seal in a junction of a multilateral well bore |
| 04/03/2001 | US6209636 Wellbore primary barrier and related systems |
| 04/03/2001 | US6209635 Positioning and conveying well apparatus and method |
| 03/29/2001 | WO2001021932A1 Apparatus and method for providing electrical transmission of power and signals in a directional drilling apparatus |
| 03/29/2001 | WO2001021931A1 Method for installing a well casing into a subsea well |
| 03/29/2001 | WO2001021929A1 Method and device for moving a tube in a borehole in the ground |
| 03/29/2001 | WO2001021927A2 Real-time control system and method for controlling an underground boring machine |
| 03/29/2001 | WO2000066872A8 Abrasive jet drilling assembly |
| 03/28/2001 | EP1086292A1 A drilling tool |
| 03/28/2001 | EP1086291A1 Directional drilling system and apparatus |
| 03/27/2001 | US6206345 Pipe pusher |
| 03/27/2001 | US6206112 Multiple lateral hydraulic drilling apparatus and method |
| 03/27/2001 | US6206111 High pressure internal sleeve for use with easily drillable exit ports |
| 03/27/2001 | US6206109 Apparatus and method for pilot-tube guided auger boring |
| 03/27/2001 | CA2188531C Method and tool for use in commencing the drilling of a deviated well |
| 03/27/2001 | CA2154959C Steerable drilling tool and system |
| 03/27/2001 | CA2138401C Process and tool for laying underground collector mains for liquids and gases |
| 03/22/2001 | WO2001020119A1 An apparatus and method for rotating a portion of a drill string |
| 03/22/2001 | WO2001020118A1 Downhole latch assembly and method of using the same |
| 03/22/2001 | WO2001020117A1 Boom arrangement for rock drilling apparatus |
| 03/22/2001 | DE19950599A1 Drill for making holes for piles has drilling screw with cutter bit at end, hammer drill being mounted in hollow central tube of drilling screw which has air cushioning system to protect it against effect of drilling screw |
| 03/22/2001 | DE19849963A1 Kompaktbohranlage zum Erstellen von Erdbohrungen Compact rig to create Erdbohrungen |
| 03/21/2001 | EP1085168A1 Apparatus for taking up forces for a drilling mast |
| 03/21/2001 | EP1085166A1 Auger drill |
| 03/21/2001 | EP0996812A4 Deformed multiple well template and process of use |
| 03/21/2001 | EP0852653A4 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means |
| 03/21/2001 | CN2424293Y Positive output volume remote control diameter variable stabilizer |
| 03/21/2001 | CN1063516C Blasthole drill with improved automatic breakout wrench |
| 03/21/2001 | CN1063515C Borehole boring method and machine |
| 03/20/2001 | US6202763 “Twin-impact” double-blow drilling apparatus |
| 03/20/2001 | US6202761 Directional drilling method and apparatus |
| 03/20/2001 | US6202758 Compact boring apparatus for making earth bores |
| 03/20/2001 | US6202752 Wellbore milling methods |
| 03/20/2001 | US6202746 Fail-safe coupling for a latch assembly |
| 03/15/2001 | DE19947645C1 Steering method for directional ground drilling device uses discontinuous rotation of supply line for drilling head for switching between straight and curved drilling modes |
| 03/15/2001 | DE10044507A1 Micro-tunnel boring machine for pipe laying has working cylinder unit at rear of pipe, tubular component at front, tipping section to correct direction, drill head at front of tubular component and sleeve connecting pipe to drill head |
| 03/15/2001 | CA2316737A1 Method and system for exploiting natural resources under the seabed |
| 03/15/2001 | CA2282945A1 Apparatus for reducing a linear velocity of entrained particles in an air drilling return air stream |
| 03/14/2001 | EP1083292A1 Interchangeable bit system for directional boring |
| 03/14/2001 | EP0870092B1 Method and apparatus for forming piles in-situ |
| 03/14/2001 | EP0677135B1 Method and apparatus for setting a whipstock |
| 03/13/2001 | US6199656 Casing for noise attenuation in a rock drilling rig |
| 03/13/2001 | US6199643 Method and apparatus for directional boring |
| 03/13/2001 | US6199635 Shifting apparatus and method for use in tubular strings for selective orientation of tubular strings below the shifting apparatus |
| 03/13/2001 | US6199633 Method and apparatus for intersecting downhole wellbore casings |
| 03/09/2001 | CA2292152A1 Hydrovac excavating blast wand |
| 03/08/2001 | WO2001016457A1 Method and apparatus for intersecting downhole wellbore casings |
| 03/08/2001 | CA2383498A1 Method and apparatus for intersecting downhole wellbore casings |
| 03/06/2001 | US6196766 Apparatus for movement along an underground passage and method using same |
| 03/06/2001 | US6196337 Water pressure post-hole digger |
| 03/06/2001 | US6196336 Method and apparatus for drilling boreholes in earth formations (drilling liner systems) |
| 03/06/2001 | US6196333 Hydrostatic penetration device and tool for the same |
| 03/06/2001 | US6196322 Underwater installation and method for building of an underwater installation |
| 02/28/2001 | CN1062635C Drilling method and bit assembly to realise method |
| 02/28/2001 | CN1062634C Steerable drilling with downhole motor |
| 02/27/2001 | US6192748 Dynamic orienting reference system for directional drilling |
| 02/22/2001 | WO2001012945A1 Bit connector |
| 02/22/2001 | WO2000037764A3 Improved steerable drilling system and method |
| 02/22/2001 | DE19938578A1 Fahrbares Arbeitsgerät Working appliance movable |
| 02/21/2001 | EP1077306A2 Mobile work apparatus |
| 02/21/2001 | EP1076754A1 Pneumatic submersible boring tool |
| 02/21/2001 | EP0885343B1 Directional boring |
| 02/21/2001 | CN2420414Y Underwell guide tool |
| 02/20/2001 | US6189630 Downhole hammer-type core barrel |
| 02/20/2001 | US6189629 Lateral jet drilling system |
| 02/20/2001 | US6189628 Earth borer system with drill-rod changer |
| 02/20/2001 | US6189616 Expandable wellbore junction |
| 02/18/2001 | CA2316494A1 Mobile working apparatus |
| 02/14/2001 | EP1075585A1 Device relating to a boring assembly |
| 02/13/2001 | US6186233 Down hole assembly and method for forming a down hole window and at least one keyway in communication with the down hole window for use in multilateral wells |
| 02/08/2001 | WO2001009478A1 Long reach rotary drilling assembly |
| 02/08/2001 | WO2000039412A3 A casing for noise attenuation in a rock drilling rig and an arrangement in conjunction with a rock drilling rig |
| 02/07/2001 | CN2418247Y Synchronous reamer |
| 02/07/2001 | CN2418246Y Double-scraper borehole reamer |
| 02/06/2001 | US6183163 Method and apparatus for laying out a pipeline |
| 02/06/2001 | US6182776 Overburden drilling apparatus having a down-the-hole hammer separatable from an outer casing/drill bit unit |