| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 10/11/1989 | EP0144425B1 Vertical hole-boring machine |
| 10/10/1989 | US4872518 Power chainsaw-ice auger conversion apparatus |
| 10/10/1989 | US4872514 Drive unit for driving ramming parts under water |
| 10/10/1989 | US4872509 Oil well production system using a hollow tube liner |
| 10/04/1989 | EP0335609A2 Soil displacement hammer |
| 10/04/1989 | EP0335543A1 Drilling apparatus |
| 10/04/1989 | EP0335111A1 Device for producing earth bore holes for laying distribution pipelines |
| 10/04/1989 | CN2045420U Offset-adjusting device for pumping unit portal |
| 10/03/1989 | US4871037 Excavation apparatus, system and method |
| 10/03/1989 | US4871034 Rammer |
| 09/27/1989 | EP0334009A1 Igniting device for a thermal lance |
| 09/27/1989 | EP0333712A1 Drilling and winning installation for mining |
| 09/26/1989 | US4869619 Method for excavating hole and apparatus therefor |
| 09/26/1989 | CA1261817A1 Earth drilling method and apparatus using multiple hydraulic forces |
| 09/26/1989 | CA1260456A1 Hydraulic pulse generator |
| 09/26/1989 | CA1260455A1 Method and apparatus for combined jet and mechanical drilling |
| 09/26/1989 | CA1260453A1 System and method for controlled directional drilling |
| 09/26/1989 | CA1259980A1 Shaft sinking rig |
| 09/21/1989 | WO1989008769A1 Drill |
| 09/20/1989 | EP0333484A2 Flow pulsing apparatus for down-hole drilling equipment |
| 09/20/1989 | EP0332883A1 Crawler mounted drill vehicle |
| 09/19/1989 | US4867255 Technique for steering a downhole hammer |
| 09/19/1989 | US4867241 Limited entry, multiple fracturing from deviated wellbores |
| 09/13/1989 | EP0331913A2 Boring ram with a turn-and-pull reversing device |
| 09/12/1989 | US4866214 Service cable for a subsoil penetrating tool and method of preventing rotation of the cable when in use |
| 09/12/1989 | US4865128 Gravel packing system for a production radial tube |
| 09/07/1989 | DE3446201A1 Process and device for the underground production of plastic pipelines in non-accessible tunnel cross-sections |
| 09/06/1989 | EP0330829A1 Method and device for taking soil samples |
| 09/06/1989 | EP0330683A1 Cutting or roller bit |
| 09/05/1989 | US4864093 Exothermic cutting electrode |
| 09/05/1989 | US4862974 Downhole drilling assembly, apparatus and method utilizing drilling motor and stabilizer |
| 09/05/1989 | US4862591 Ice spud |
| 08/31/1989 | DE3805160A1 Process for the underground connection of a product pipe to a collector, in particular in the region in which it is not possible to walk |
| 08/30/1989 | EP0329678A1 Method and device for replacing damaged pipes buried in the ground. |
| 08/29/1989 | US4860837 Rotary and reciprocating drilling machine |
| 08/23/1989 | EP0329262A2 Adjustable stabiliser for use in drilling string |
| 08/23/1989 | CN1034973A Method of isolation of troublesorne zones in well with profile patch liners |
| 08/22/1989 | US4858705 Assembly for making oriented bore-holes |
| 08/22/1989 | US4858704 Guided earth boring tool |
| 08/22/1989 | US4858703 Self-propelled subsoil penetrating tool system |
| 08/22/1989 | US4858700 Articulated apparatus for positioning rock drills |
| 08/17/1989 | DE3803601A1 Pipe-advancement apparatus, in particular for advancing small-diameter pipes in the earth |
| 08/16/1989 | EP0327925A1 Apparatus for the random straight or directional drilling into underground formations |
| 08/16/1989 | EP0327667A2 Method and device for taking soil samples |
| 08/16/1989 | EP0327598A1 Fusion-drilling process. |
| 08/15/1989 | US4856938 Method of and arrangement for separating tubular foundation piles under water |
| 08/15/1989 | US4856600 Technique for providing an underground tunnel utilizing a powered boring device |
| 08/10/1989 | WO1989007192A1 Device for making wells in the ground |
| 08/10/1989 | WO1989007178A1 Method and device for trench-free laying of pipelines |
| 08/10/1989 | DE3901921A1 Rodless multi-hole drilling and cutting unit |
| 08/10/1989 | DE3802421A1 Drilling device for making drill holes with an undercut |
| 08/10/1989 | DE3802249A1 Tunnel-driving method |
| 08/08/1989 | US4854404 Bucket auger |
| 08/08/1989 | US4854402 Shaft sinking rig |
| 08/08/1989 | US4854399 Tubular element for use in a rotary drilling assembly |
| 08/08/1989 | US4854398 Locating devices for soil displacement hammers |
| 08/08/1989 | US4854397 System for directional drilling and related method of use |
| 08/08/1989 | US4854396 Pivoting cutter for ice coring auger |
| 08/08/1989 | CA1258262A1 Apparatus and method for forming an anlarged underground arcuate bore and installing a conduit therein |
| 08/03/1989 | DE3801472A1 Process for repairing a buried pipeline |
| 08/02/1989 | EP0325733A2 Drilling device for making holes with undercuttings |
| 08/01/1989 | US4852800 Method and apparatus for stablizing flow to sharp edges orifices |
| 08/01/1989 | US4852669 Directional downhole drill apparatus |
| 08/01/1989 | US4852668 Hydraulic drilling apparatus and method |
| 08/01/1989 | US4852666 Apparatus for and a method of drilling offset wells for producing hydrocarbons |
| 07/27/1989 | WO1989006741A1 Apparatus for forming slit in base rock and concrete surface |
| 07/27/1989 | WO1989006739A1 Method of constructing a well |
| 07/26/1989 | EP0325272A2 Drill bit with improved steerability |
| 07/26/1989 | EP0324870A1 Self-steering drill string pipe for rotating drill strings of rock drilling machines |
| 07/26/1989 | EP0324778A1 Boring apparatus |
| 07/25/1989 | US4850440 Method and device for making a hole in the ground |
| 07/20/1989 | DE3903864C1 Method and apparatus for redeveloping old pipes |
| 07/19/1989 | EP0324703A1 Device for boring into the soil |
| 07/19/1989 | EP0324463A1 Device for expanding pipes |
| 07/19/1989 | EP0324287A1 Pipe burster |
| 07/18/1989 | US4848966 Arrangement in a production platform |
| 07/18/1989 | US4848964 Apparatus for correcting irregularities in or enlarging an underground duct |
| 07/18/1989 | US4848490 Downhole stabilizers |
| 07/18/1989 | US4848488 Method and device for adjusting the path of a drilling tool fixed to the end of a set of rods |
| 07/18/1989 | US4848486 Method and apparatus for transversely boring the earthen formation surrounding a well to increase the yield thereof |
| 07/18/1989 | US4848144 Method of predicting the torque and drag in directional wells |
| 07/18/1989 | CA1257580A1 Controllable downhole directional drilling tool |
| 07/18/1989 | CA1257515A1 Reversible percussive action machine |
| 07/18/1989 | CA1257483A1 Method for restoring underground pipelines |
| 07/13/1989 | DE3801824C1 Method and apparatus for the trenchless laying of supply lines |
| 07/05/1989 | EP0323433A1 Device for the underground installation of pipes or the like |
| 07/05/1989 | CN2040529U Hydraulic jet impulse rotary driller |
| 07/04/1989 | US4844182 Method for improving drill cuttings transport from a wellbore |
| 07/04/1989 | US4844178 Drilling device having a controlled path |
| 07/04/1989 | CA1256792A1 Multi-well hydrocarbon development system |
| 06/29/1989 | DE3743202A1 Control of pipe advances by means of asymmetrical longitudinal prestressing |
| 06/29/1989 | DE3743200A1 Non-reversing mechanism for pipe advances in compressed air |
| 06/29/1989 | DE3741717A1 Vorrichtung zum niederbringen von im wesentlichen vertikalen bohrungen Apparatus for bringing down of substantially vertical holes |
| 06/27/1989 | US4842248 Hydraulic rod pusher-puller |
| 06/27/1989 | US4842207 Device for detecting and measuring the tension on a cable |
| 06/27/1989 | US4842081 Simultaneous drilling and casing device |
| 06/27/1989 | CA1256421A1 Drill shoe |
| 06/26/1989 | EP0288527A4 Earth boring apparatus. |
| 06/22/1989 | DE3740306A1 Adjustable, hydraulic widening apparatus for repairing or renewing underground sewer pipes, by widening with as small an annular space as possible, for the subsequent guiding-in of special short pipes |
| 06/21/1989 | CN2039734U Stator and rotor positioning device for continuous boring deflecting apparatus |