| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 10/06/1987 | US4697791 For use on land or underwater |
| 10/06/1987 | US4697652 Reversible roller stabilizer extensions for earth boring head |
| 10/06/1987 | US4697651 Method of drilling deviated wellbores |
| 10/06/1987 | US4697649 Portable apparatus for and method of pole reinforcement |
| 10/06/1987 | US4697647 Reversible percussive action machine |
| 10/06/1987 | CA1227787A1 Method and equipment for rock drilling |
| 10/06/1987 | CA1227742A1 Method for gravel packing horizontal wells |
| 09/24/1987 | DE3625140C1 Pipe-expansion unit |
| 09/24/1987 | DE3620026A1 Process and apparatus for repairing sewerage systems or the like comprising concrete or stoneware pipes |
| 09/24/1987 | DE3607324C1 Self-propelled pneumatic or hydraulic ram |
| 09/22/1987 | US4694915 Slotted wall milling cutter |
| 09/22/1987 | US4694914 Drilling string for drilling a bent bore, a method of using said string, and a bending device used in said string |
| 09/22/1987 | US4694913 Guided earth boring tool |
| 09/17/1987 | DE3608511A1 Wagon drill with magazine-mounting device |
| 09/15/1987 | US4693404 Mains bursting tool |
| 09/15/1987 | US4693327 Earth well drilling apparatus |
| 09/15/1987 | US4693326 Cycloidal earth cutting system with rocker-type nutating action |
| 09/15/1987 | US4693325 Sonic drill employing orbiting crank mechanism |
| 09/08/1987 | US4692062 Shield type tunneling machine |
| 09/08/1987 | US4691790 Method and apparatus for removing the inner conduit from a dual passage drill string |
| 09/08/1987 | US4691789 Process for establishing a clear horizontal borehole in a subterranean formation |
| 09/08/1987 | US4691788 Lateral hole boring method and apparatus |
| 09/08/1987 | US4691787 Earth auger |
| 09/08/1987 | CA1226532A1 Replacing mains |
| 09/08/1987 | CA1226515A1 Contamination removal system and method |
| 09/02/1987 | EP0235105A2 Drill tool |
| 08/26/1987 | EP0233794A1 Apparatus for connecting auxiliary lines to an underwater drilling equipment |
| 08/25/1987 | US4688854 Apparatus for making small-bore tunnels |
| 08/25/1987 | US4688648 Method of and apparatus for crushing earth under the ground |
| 08/25/1987 | CA1225985A1 Soil-displacement drill and method for manufacturing pile |
| 08/20/1987 | DE3604506A1 Rotary percussive drive machine |
| 08/19/1987 | CN86202090U Orient & slope guiding device for prospecting & drilling |
| 08/18/1987 | US4687401 Pipe positioner |
| 08/18/1987 | US4687060 Production and grout liner for methane drainage in subterranean boreholes and method |
| 08/12/1987 | EP0231592A2 Locking device |
| 08/12/1987 | EP0231414A1 Earth auger |
| 08/12/1987 | EP0144390B1 A safety arrangement in gas-cutting lances |
| 08/11/1987 | US4685895 Stabilizer mechanism for use in drilling deviated well bores |
| 08/06/1987 | DE3602720A1 Apparatus for breaking up a pipeline laid in the earth |
| 08/05/1987 | EP0230650A1 Exothermic cutting electrode |
| 08/04/1987 | US4684290 Apparatus for below-ground driving of pipeline segments |
| 07/28/1987 | US4682899 Feed beam for a rock drill |
| 07/23/1987 | DE3601713A1 Mobile drilling and pile-driving plant |
| 07/22/1987 | EP0229425A2 Forming a coating on a borehole wall |
| 07/21/1987 | US4681264 Enhancing liquid jet erosion |
| 07/21/1987 | US4681175 For installing utility pipes in the ground |
| 07/21/1987 | US4681173 Method and apparatus for drilling a group of subsea wells |
| 07/21/1987 | US4681170 Rock drills for drilling continuously arrayed bores |
| 07/21/1987 | CA1224508A1 Self-propelled saverdrill |
| 07/14/1987 | US4679637 Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein |
| 07/14/1987 | US4679636 Method and apparatus for coring rock |
| 07/14/1987 | US4679489 Automatic leveling system for blast hole drills and the like |
| 07/08/1987 | EP0228138A2 Process for placing a concrete pile in the ground and a screw drill and casing to be used in the process |
| 07/08/1987 | CN86108896A Exothermic cutting electrode |
| 07/07/1987 | US4678045 Turbine tool |
| 07/02/1987 | WO1987003924A1 Soil displacement hammer |
| 07/02/1987 | DE3614196C1 Combined cutting tool for a heading machine |
| 07/01/1987 | EP0227456A2 Earth well drilling apparatus |
| 06/30/1987 | US4676322 Supporting arrangement for a feed device for a rock drilling machine |
| 06/23/1987 | US4674914 Replacing mains |
| 06/23/1987 | US4674580 Means for reducing bending stresses in drill pipe |
| 06/23/1987 | US4674579 Method and apparatus for installment of underground utilities |
| 06/19/1987 | DE3638150A1 Universal road and all-terrain vehicle trailer for all-terrain drilling devices |
| 06/19/1987 | DE3543732A1 Method of drilling a foundation borehole for a construction element to be erected approximately perpendicularly |
| 06/16/1987 | US4673312 Method and apparatus for the underground installation of pipelines |
| 06/16/1987 | US4673045 Enhanced circulation drill bit |
| 06/10/1987 | EP0138820B1 Plant for making bore-holes in the side walls of underground exploitation chambers of small width |
| 06/09/1987 | US4671703 Apparatus for driving pipes through the ground |
| 06/09/1987 | US4671367 Pole hole digger with percussive core drilling |
| 06/09/1987 | US4671365 Drill feeding and hoisting system for an earthdrill |
| 06/04/1987 | WO1987003353A1 Method for restoring underground pipelines |
| 06/04/1987 | WO1987003329A1 Improvements in directional drilling of a drill string |
| 06/03/1987 | CN86201592U Submersible inclined hole drilling rig with telescopic drill rod |
| 06/02/1987 | US4669229 Energy dissipating receptacle for high-velocity fluid jet |
| 06/02/1987 | CA1222505A1 Targetable drill with pressure telemetering of drill parameters |
| 06/02/1987 | CA1222448A1 Casing shoe |
| 05/27/1987 | EP0223575A2 Drilling apparatus |
| 05/27/1987 | DE3544776C1 Drill carriage with rotatable bracing column |
| 05/26/1987 | US4667754 Flexible plug for obtaining soil samples during drilling operations |
| 05/26/1987 | US4667751 System and method for controlled directional drilling |
| 05/26/1987 | US4667750 Vibratory earth penetrator with synchronized air lance control |
| 05/26/1987 | US4667742 Down hole excitation system for loosening drill pipe stuck in a well |
| 05/21/1987 | DE3634144A1 Implement for working rock, in particular block-drilling implement |
| 05/21/1987 | DE3539897A1 Method and arrangement for producing underground structural objects guided rectilinearly in a closed profile, in particular tunnel-like structures under the turf level, by pressing tube elements into the ground |
| 05/19/1987 | US4665995 Wedging assembly for borehole steering or branching |
| 05/19/1987 | US4665944 On-off dump valve |
| 05/12/1987 | CA1221552A1 Pipe laying and replacement |
| 05/05/1987 | US4662606 Pipe propelling device |
| 05/05/1987 | US4662459 Drilling system and method employing torsional sonic vibration for lubrication of journal type bit bearings |
| 05/05/1987 | US4662458 Method and apparatus for bottom hole measurement |
| 05/05/1987 | US4662457 Reversible underground piercing device |
| 04/30/1987 | DE3634502A1 Roof-bolting drilling apparatus |
| 04/28/1987 | US4660807 Wrapped thermal torch and method |
| 04/28/1987 | CA1221085A1 Earth drilling apparatus and method |
| 04/23/1987 | WO1987002408A1 System and method for controlled directional drilling |
| 04/21/1987 | US4658916 Drill shaft for boring earth material |
| 04/21/1987 | US4658903 Method for handling wellhead assembly |
| 04/21/1987 | CA1220640A1 Method and apparatus for thrusting a shield for use in tunneling |
| 04/16/1987 | DE3607461C1 Screw conveyor for an apparatus for the underground driving of pipelines |
| 04/15/1987 | EP0217995A2 A device that may be applied to perforating drills for the drilling of foundation holes,and the insertion and stabilization of reinforcement tubes |