| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 03/30/1982 | CA1120916A1 Positioning control system for rock drill support apparatus |
| 03/30/1982 | CA1120915A1 Positioning control system for rock drill support apparatus |
| 03/23/1982 | US4320915 Internal elevator |
| 03/16/1982 | US4319784 Apparatus for water jet and impact drilling and mining |
| 03/16/1982 | US4319649 Stabilizer |
| 03/16/1982 | US4319648 Process for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein |
| 03/16/1982 | US4319647 Flame drill channelling method and apparatus for reducing noise and dust levels |
| 03/02/1982 | US4317494 Material removal device |
| 03/02/1982 | US4317493 Kelly drive bushing adapter |
| 03/02/1982 | US4317492 Method and apparatus for drilling horizontal holes in geological structures from a vertical bore |
| 02/23/1982 | US4316515 Shaft drill bit with improved cutter bearing and seal arrangement and cutter insert arrangement |
| 02/23/1982 | CA1118756A1 Shaft drill bit with improved cutter bearing and seal arrangement and cutter insert arrangement |
| 02/10/1982 | EP0045651A2 Apparatus and method for supporting a tubular riser |
| 02/09/1982 | CA1117933A1 Multi-purpose mobile drill rig |
| 02/03/1982 | EP0044871A1 Method of burying wire, tube or cable under ground |
| 02/02/1982 | US4313570 High pressure cutting nozzle with on-off capability |
| 02/02/1982 | CA1117519A1 Method and device for setting the direction and/or the inclination of an elongated rock drilling apparatus |
| 02/02/1982 | CA1117518A1 All terrain drill unit |
| 01/27/1982 | EP0044706A2 Method and apparatus for forming and using a bore hole |
| 01/27/1982 | EP0044386A1 Drilling device for obtaining an undercut hole |
| 01/26/1982 | US4312413 Drilling apparatus |
| 01/26/1982 | CA1117002A1 Apparatus and method for re-entering and cementing an underwater well |
| 01/26/1982 | CA1116879A1 Method and apparatus for making holes in the ground, particularly in view of the subsequent planting of poles, stakes or similar |
| 01/19/1982 | CA1116591A1 Earth boring apparatus |
| 01/12/1982 | US4310057 Apparatus for extracting subterranean gas samples |
| 01/05/1982 | US4308923 Accu-press |
| 12/29/1981 | US4307786 Borehole angle control by gage corner removal effects from hydraulic fluid jet |
| 12/29/1981 | US4307785 Pile driving rig having angulating knuckle lead therefor |
| 12/29/1981 | US4307780 Angular whipstock alignment means |
| 12/29/1981 | CA1115263A1 Method and device in earth cutting |
| 12/22/1981 | US4306627 Fluid jet drilling nozzle and method |
| 12/22/1981 | US4306626 Hydraulic earth boring machine |
| 12/22/1981 | CA1114740A1 Sea-floor shoring cellar and method of installing the same |
| 12/22/1981 | CA1114720A1 Turning mechanism for the feed of a drilling machine, especially a rock drill |
| 12/22/1981 | CA1114624A1 Offshore structure carrying a plurality of curved conductor casings and method of installing a curved conductor casing on an offshore structure |
| 12/15/1981 | US4305474 Thrust actuated drill guidance device |
| 12/15/1981 | US4305468 Method for drilling wellbores from an offshore platform |
| 12/15/1981 | US4305466 Offshore platform having three decks |
| 12/15/1981 | US4305462 Apparatus for positioning deflection wedges |
| 12/08/1981 | US4304309 Surface drilling apparatus |
| 12/08/1981 | US4304308 Burner apparatus for making holes in coal seams |
| 12/08/1981 | US4304299 Method for setting and orienting a whipstock in a well conduit |
| 12/01/1981 | US4303135 Directional drilling sub |
| 12/01/1981 | US4303134 Earth boring guide |
| 12/01/1981 | US4303130 All terrain drill unit |
| 12/01/1981 | CA1113446A2 Reamer |
| 11/24/1981 | US4301876 Non-rotating stabilizer for raise boring |
| 11/24/1981 | US4301875 Method for making holes and producing gas in coal seams |
| 11/24/1981 | CA1113082A2 Reamer |
| 11/24/1981 | CA1113081A1 Positioning deflection wedges |
| 11/17/1981 | US4300642 Device for reaming and collecting dust, for a drilling apparatus |
| 11/17/1981 | CA1112636A1 Drill machine guidance using natural occurring radiation |
| 11/12/1981 | WO1981003157A1 Submerged buoyant offshore drilling and production tower |
| 11/11/1981 | EP0039597A2 Drilling a borehole from an offshore platform |
| 11/11/1981 | EP0039596A2 Offshore drilling and production system |
| 11/11/1981 | EP0039589A2 Submerged buoyant offshore drilling and production tower and apparatus and method for installing same |
| 11/10/1981 | US4299295 Process for degasification of subterranean mineral deposits |
| 11/10/1981 | CA1112255A1 Arrangement for discharging liquid medium under high pressure |
| 11/10/1981 | CA1112232A1 Flexible shaft and roof drilling system |
| 11/03/1981 | US4298073 Drill head |
| 11/03/1981 | CA1111958A1 Digital motor control method and apparatus for measuring-while-drilling |
| 11/03/1981 | CA1111831A2 Broaching head |
| 11/03/1981 | CA1111830A1 Extended reach drilling method |
| 10/27/1981 | US4297699 Radar drill guidance system |
| 10/27/1981 | US4296970 Hydraulic mining tool apparatus |
| 10/27/1981 | US4296821 Drilling rig and conversion apparatus |
| 10/27/1981 | US4296819 Cable tensioner for a downcrowding device for earth boring machines |
| 10/27/1981 | CA1111410A2 Guiding head |
| 10/21/1981 | EP0037821A1 Monitoring equipment for drilling operations |
| 10/20/1981 | US4295536 Pressure seal for pumping instruments through drill rod |
| 10/20/1981 | US4295534 Well boring rigs and spoil handling conveyor apparatus therefor |
| 10/20/1981 | US4295533 Pneumatically operated ram borer |
| 10/13/1981 | US4294183 Cutter configuration for efficient ice disaggregation and clearing |
| 10/13/1981 | CA1110612A1 Method of caisson placement |
| 10/06/1981 | CA1110226A1 Shaft drill bit with overlapping cutter arrangement |
| 10/06/1981 | CA1110225A1 Rotating drill tool with impact device |
| 09/30/1981 | EP0036850A2 A working machine for demolition and excavation work |
| 09/29/1981 | US4291773 Strictive material deflectable collar for use in borehole angle control |
| 09/29/1981 | CA1109857A1 Device for setting the direction and/or the inclination of an elongated rock drilling apparatus |
| 09/22/1981 | US4290496 Combination impact and pressure liquid rock drill |
| 09/22/1981 | US4290494 Flexible shaft and roof drilling system |
| 09/22/1981 | US4290491 Rock drill positioning mechanism |
| 09/22/1981 | US4290490 Roof bolting device |
| 09/22/1981 | CA1109452A1 Measuring and transmitting apparatus for use in a drill string |
| 09/16/1981 | EP0035982A1 A rock drilling rig |
| 09/08/1981 | US4288056 Device for setting the direction and/or the inclination of an elongated rock drilling apparatus |
| 09/08/1981 | US4287953 Method of removing conduit from curved borehole |
| 09/01/1981 | US4286676 Crank connector for directional drilling |
| 09/01/1981 | EP0029449A4 Variable angle directional drilling sub. |
| 09/01/1981 | CA1108120A1 System for boring raises having portions of different diameters |
| 09/01/1981 | CA1108119A1 Large diameter bit with bridge mounted drive stem |
| 09/01/1981 | CA1108116A1 Methods and mechanisms for drilling transversely in a well |
| 08/25/1981 | US4285399 Apparatus for setting and orienting a whipstock in a well conduit |
| 08/25/1981 | CA1107715A1 Steep angle raise bit |
| 08/25/1981 | CA1107637A1 Method and apparatus for borehole perforating |
| 08/20/1981 | WO1981002317A1 Method of burying wire,tube or cable under ground |
| 08/19/1981 | EP0034134A1 Rock bolting apparatus |
| 08/19/1981 | EP0034106A1 Earth-compression drill bit with plane closing disc |
| 08/18/1981 | US4284150 Soil sampling device |
| 08/18/1981 | US4284147 Control device for the forward movement and rearward movement of pneumatic ram boring devices |