| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 06/21/1989 | CN2039733U Directioning instrument for core drilling in rock |
| 06/20/1989 | US4840517 Soil displacement tools |
| 06/20/1989 | US4840238 Superposed drilling device |
| 06/20/1989 | US4840235 Impact hammer assembly for drilling rock |
| 06/20/1989 | US4840234 Pneumatic ram boring machine |
| 06/20/1989 | CA1256095A1 Combination shock tool and reamer/integral blade stabilizer |
| 06/15/1989 | WO1989005391A1 Device for drilling essentially vertical boreholes |
| 06/15/1989 | DE3835900A1 Verfahren sowie vorrichtung zum austausch einer im erdreich verlegten rohrleitung Method and device for exchange of a laid in the ground-pipeline |
| 06/15/1989 | DE3803070C1 Arrangement for advancing an advancement pipe |
| 06/15/1989 | DE3740700A1 Measuring method for locating drilling obstacles and foreign bodies in the ground |
| 06/14/1989 | EP0319667A2 Pipe propelling apparatus |
| 06/14/1989 | EP0213192B1 Marine riser fill-up valve |
| 06/13/1989 | CA1255651A1 Steering and control system for percussion boring tools |
| 06/07/1989 | EP0319527A2 Apparatus for providing an underground tunnel |
| 06/07/1989 | EP0318472A1 Enhanced circulation drill bit |
| 06/06/1989 | US4836303 Device for the remote adjustment of the relative orientation of two sections of a column |
| 06/06/1989 | US4836301 Method and apparatus for directional drilling |
| 06/06/1989 | US4836299 Sonic method and apparatus for installing monitor wells for the surveillance and control of earth contamination |
| 06/06/1989 | CA1255288A1 Development well drilling |
| 06/06/1989 | CA1255109A1 Offshore drilling and/or production system |
| 06/01/1989 | DE3728270A1 Method and apparatus for constructing concrete piles in the ground |
| 05/31/1989 | EP0318471A1 Pitch angle monitoring arrangement |
| 05/31/1989 | EP0317605A1 Device for guiding a drilling tool and/or pipe string |
| 05/30/1989 | US4834196 Well drilling tool |
| 05/30/1989 | US4833974 Ram boring machine |
| 05/24/1989 | EP0316747A2 Method and apparatus for building pipeline |
| 05/24/1989 | EP0316448A1 Control unit for underground excavators |
| 05/23/1989 | US4832135 Flow through raise boring bit |
| 05/18/1989 | WO1989004418A1 Self-propelled subsoil penetrating tool system |
| 05/18/1989 | WO1989004417A1 Ignition device for lances |
| 05/18/1989 | DE3736458A1 Method and device for making an earth bore |
| 05/16/1989 | US4830541 Suction-type ocean-floor wellhead |
| 05/16/1989 | US4830539 Pipe propelling apparatus |
| 05/16/1989 | US4830122 Flow pulsing apparatus with axially movable valve |
| 05/09/1989 | US4828053 Deviated wellbore drilling system and apparatus |
| 05/09/1989 | US4828052 Ultrasonic drilling apparatus |
| 05/09/1989 | US4828050 Single pass drilling apparatus and method for forming underground arcuate boreholes |
| 05/03/1989 | DE3735304A1 Machine for making holes in the earth |
| 05/03/1989 | DE3734512A1 Jacking apparatus for the pipe jacking method |
| 05/02/1989 | US4826087 Manipulative device |
| 05/02/1989 | US4825747 Method and device for detecting a fluid flow rate |
| 04/27/1989 | DE3734511A1 Jacking apparatus for the pipe jacking method |
| 04/26/1989 | EP0313413A1 Flexible drill string member and method of drilling deviated holes |
| 04/26/1989 | EP0312926A1 Rock drill |
| 04/26/1989 | EP0312724A1 Method for excavating hole and apparatus therefor |
| 04/25/1989 | US4823888 Apparatus for making a subterranean tunnel |
| 04/25/1989 | CA1253149A1 Process for obtaining phenyloxoalcoyl piperidines and pharmaceutical compositions containing same |
| 04/20/1989 | DE3729138A1 Method and drilling rig for producing underground transverse bores, in particular horizontal core bores for obtaining soil samples, from the surface |
| 04/18/1989 | US4821817 Actuator for an appliance associated with a ducted body, especially a drill rod |
| 04/18/1989 | US4821815 Technique for providing an underground tunnel utilizing a powered boring device |
| 04/12/1989 | EP0311363A2 Hollow steel pile, manufacturing method and pile driving method |
| 04/11/1989 | US4819745 Flow pulsing apparatus for use in drill string |
| 04/11/1989 | US4819744 Funnel hole ice auger |
| 04/11/1989 | US4819741 Reversiele percussion device |
| 04/11/1989 | US4819730 Development drilling system |
| 04/05/1989 | EP0310215A1 System and method for completing multiple wells from a single well bore |
| 04/04/1989 | USH614 Method to connect drill holes utilizing signalling devices |
| 04/04/1989 | US4818149 Method of and a drive unit for driving ramming parts under water |
| 04/04/1989 | US4817741 Rotary drill |
| 04/04/1989 | US4817740 Apparatus for directional drilling of subterranean wells |
| 04/04/1989 | US4817739 Drilling enhancement tool |
| 04/04/1989 | US4817735 Foot powered ice auger |
| 04/04/1989 | US4817734 Submergible electrohydraulic drive unit for ramming and working devices to be used under water |
| 04/04/1989 | CA1252081A1 Underground, fluid driven directional drilling device |
| 03/30/1989 | DE3733463C1 Process and apparatus for exchanging pipes |
| 03/28/1989 | US4815695 Pipe propelling device |
| 03/28/1989 | US4815328 Roller type orbiting mass oscillator with low fluid drag |
| 03/28/1989 | CA1251778A1 Method of drilling a directional well bore |
| 03/23/1989 | WO1989002513A1 Drilling and winning installation for mining |
| 03/22/1989 | EP0308083A2 Device for sampling soils and retaining volatiles therein and method of using same |
| 03/21/1989 | US4813611 Compressed air nozzle |
| 03/21/1989 | US4813499 For the drilling of a vertical concrete structure |
| 03/21/1989 | US4813497 Adjustable bent sub |
| 03/21/1989 | US4813496 Drill ahead tool |
| 03/21/1989 | US4813495 Method and apparatus for deepwater drilling |
| 03/15/1989 | CN1031743A Apparatus for cutting, drilling or similar machining stone. ores or similars |
| 03/14/1989 | US4811800 Flexible drill string member especially for use in directional drilling |
| 03/14/1989 | US4811798 Drilling motor deviation tool |
| 03/14/1989 | CA1251127A1 Energy dissipating receptacle for high-velocity fluid jet |
| 03/09/1989 | WO1989001837A1 Rotating, radially impacting rollers, balls or similar for excavating/milling of rocks or other materials |
| 03/08/1989 | EP0306112A1 Process for laying a line in the ground |
| 03/08/1989 | EP0305834A2 Process and apparatus for making a duct in an underground borehole |
| 03/08/1989 | EP0305658A1 Milling device for slits |
| 03/07/1989 | US4809790 Device for sampling soils and retaining volatiles therein and method of using same |
| 03/07/1989 | US4809789 Finned impact operating boring tool |
| 03/07/1989 | US4809788 Mast assembly for percussive and auger drilling |
| 03/07/1989 | CA1250943A1 Drilling method and apparatus |
| 03/07/1989 | CA1250827A1 Method and apparatus for installment of underground utilities |
| 03/01/1989 | EP0305178A1 Improvements in or relating to soil sampling |
| 03/01/1989 | EP0304988A1 Method and apparatus for producing pressure variations in a drilling fluid |
| 02/28/1989 | US4807708 Directional drilling of a drill string |
| 02/28/1989 | US4807707 For sampling soil gas or ground water |
| 02/28/1989 | US4807704 System and method for providing multiple wells from a single wellbore |
| 02/28/1989 | CA1250653A1 Downhole pressure fluctuating tool |
| 02/23/1989 | WO1989001396A1 Device to cut, drill or similarly machine rock, ore, concrete or similar |
| 02/21/1989 | US4806869 An above-ground arrangement for and method of locating a discrete in ground boring device |
| 02/21/1989 | US4805705 Drill bit |
| 02/21/1989 | CA1250280A1 Methods and apparatus for controlled directional drilling of boreholes |
| 02/15/1989 | EP0303313A1 Device for the cutting, drilling or similar working of stone, concrete or the like |
| 02/15/1989 | EP0303085A2 Method and device for laying heating pipes in the ground |