| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 03/02/1994 | CA2077300A1 Lightweight drill pipe |
| 03/02/1994 | CA2077299A1 Method of horizontal drilling |
| 02/24/1994 | DE4227326A1 Earth piercing appts. for soil treating method - or for mechanical, chemical, hydraulic or biological soil improvement |
| 02/23/1994 | EP0583650A1 Method and device for underground introduction of long transport pipes into the earth |
| 02/23/1994 | CN2157298Y Adjustable bent |
| 02/22/1994 | US5288173 Method for the directional control of an earth boring device as well as apparatus for making earth bores |
| 02/22/1994 | US5287921 Method and apparatus for setting a whipstock |
| 02/17/1994 | WO1994003702A1 Method and apparatus for sealing the juncture between a vertical and horizontal well |
| 02/17/1994 | WO1994003700A1 Lightweight drill pipe |
| 02/17/1994 | WO1994003699A1 Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells |
| 02/17/1994 | WO1994003698A1 Method and apparatus for locating and re-entering one or more horizontal wells using whipstocks |
| 02/17/1994 | WO1994003697A1 Method and apparatus for locating and re-entering one or more horizontal wells using mandrel means |
| 02/17/1994 | WO1994003696A1 A method of horizontal drilling |
| 02/16/1994 | EP0397872B1 Well expander |
| 02/16/1994 | CN1082138A Hole opener for the top hole section of oil/gas wells |
| 02/15/1994 | CA1327036C System and method for providing multiple wells from a single wellbore |
| 02/09/1994 | EP0581976A1 Soil Gas Sampling Probe |
| 02/09/1994 | EP0581838A1 Engine for performing subsea operations and devices driven by such an engine |
| 02/09/1994 | EP0581830A1 Earth borer |
| 02/08/1994 | US5284403 Control method and control equipment for drilling apparatus |
| 02/08/1994 | US5284216 Down-the-hole drill tool for drilling in advance of a casing tube |
| 02/08/1994 | US5284213 Subsea drilling cuttings collector and method of drilling |
| 02/03/1994 | WO1994002687A1 Apparatus and method for forming piles |
| 02/01/1994 | US5282696 Pneumatic ram pipe replacement |
| 02/01/1994 | CA2100137A1 Drilling apparatus |
| 02/01/1994 | CA1326600C Method of pipe replacement |
| 01/25/1994 | US5281775 Vibrating hole forming device for seismic exploration |
| 01/20/1994 | WO1994001653A1 Method and device for taking a core sample |
| 01/19/1994 | CN1080974A Drilling tool for hooped pile |
| 01/18/1994 | US5279373 Controllable drill head |
| 01/18/1994 | US5279372 Method of drilling holes in rock |
| 01/14/1994 | CA2100292A1 Remote hydraulic pressure intensifier |
| 01/12/1994 | EP0578034A1 Method and device for drilling an earth borehole |
| 01/12/1994 | EP0577845A1 Device for positioning member and excavating direction control device for excavator employing said device |
| 01/11/1994 | US5277518 Contaminant remediation, biodegradation and removel methods and apparatus |
| 01/11/1994 | US5277251 Method for forming a window in a subsurface well conduit |
| 01/06/1994 | WO1994000673A1 Control apparatus for excavators |
| 01/05/1994 | EP0412092B1 Method and apparatus for the production of underground pipelines |
| 01/05/1994 | CN2152070Y Directional hinged short screw drilling rig |
| 01/05/1994 | CN1080355A Quick-communicating method of halogen-production vertical well and apparatus thereof |
| 01/05/1994 | CN1080354A Successive hole boring mahchine and lost strike preventing device for successive hole boring machine |
| 01/04/1994 | CA1325801C Medium curvature directional drilling method and system |
| 12/29/1993 | EP0576167A1 Hole boring machine with lost strike preventing device |
| 12/29/1993 | EP0575922A2 Displacement drill |
| 12/29/1993 | CN1080015A Well right-angle steering level drilling system |
| 12/28/1993 | US5273124 Earth drilling apparatus |
| 12/28/1993 | US5273123 Fitting for controlled trajectory drilling, comprising a variable angle elbow element and use of this fitting |
| 12/27/1993 | CA2072467A1 Vapor probe for soil gas vapor sampler |
| 12/23/1993 | WO1993025799A1 Method of creating a wellbore in an underground formation |
| 12/23/1993 | DE4225701C1 Rotary drilling appts. with percussion capability - has two coaxial strings with variable rotational speed and direction |
| 12/23/1993 | DE4219676A1 Method of pipe laying without excavation - has core pipe driven into earth via ram with product piping following, earth being cleared by pressure medium and pushed by slide |
| 12/22/1993 | CN1079793A Excavator |
| 12/21/1993 | US5271472 Drilling with casing and retrievable drill bit |
| 12/16/1993 | DE4225806C1 Drilling bit mounting for boring large holes - has clamp within drilling tube with radial expansion against eccentric type carrier |
| 12/16/1993 | DE4217695A1 Mobile drilling system for hollow worm drilling - has slide on drill mast which is attached to vehicle, and accommodates rotating drive and has hole through which cable core device may run |
| 12/15/1993 | EP0574326A1 Apparatus, well drilling and equipment device, system and method |
| 12/15/1993 | EP0574187A1 Shield tunneling machine |
| 12/15/1993 | EP0573718A1 Moving apparatus for the automatic collection of ground samples |
| 12/15/1993 | CN1079530A Shielding apparatus |
| 12/14/1993 | US5269386 Self positioning dust seal holder |
| 12/14/1993 | US5269385 Adjustable bent housing II |
| 12/14/1993 | US5269384 Method and apparatus for cleaning a bore hole |
| 12/14/1993 | US5269383 Navigable downhole drilling system |
| 12/14/1993 | US5269107 Mobile boring rig |
| 12/12/1993 | CA2098138A1 Shield tunneling machine |
| 12/09/1993 | DE4232560C1 Earth-drilling auger device - has screw shaft bore provided with check valve |
| 12/08/1993 | EP0573227A1 Shielding apparatus |
| 12/07/1993 | US5267902 Slitting cutter |
| 12/07/1993 | US5267814 Mechanism and method for continuously constructing reinforced concrete tunnel |
| 11/30/1993 | US5265687 Drilling short radius curvature well bores |
| 11/30/1993 | US5265682 Steerable rotary drilling systems |
| 11/30/1993 | US5265466 Rod insertion method and friction reducing device |
| 11/25/1993 | WO1993023652A1 Drill bit steering |
| 11/25/1993 | CA2135282A1 Drill bit steering |
| 11/24/1993 | EP0571045A1 Directional drilling with downhole motor on coiled tubing |
| 11/23/1993 | US5263809 Material handling apparatus with multi-directional anchoring |
| 11/23/1993 | US5263545 Method and apparatus for drilling holes in soil or rock |
| 11/23/1993 | CA1324619C Shield tunneling machine with eccentricity accommodating seal structure |
| 11/16/1993 | US5261498 Drill string component |
| 11/11/1993 | WO1993022510A1 The arrest, correction and prevention of subsidence in buildings |
| 11/10/1993 | CN2145856Y Full automatic hydraulic staving press |
| 11/09/1993 | US5259469 Drilling tool for percussive and rotary drilling |
| 11/09/1993 | US5259468 Method of dynamically monitoring the orientation of a curved drilling assembly and apparatus |
| 11/09/1993 | US5259467 Directional drilling tool |
| 11/09/1993 | US5259458 Subsea shelter and system for installation |
| 11/03/1993 | EP0567460A1 Well tool and method of use |
| 11/03/1993 | CN2145257Y Multi-section reaming pile reamer |
| 11/03/1993 | CN1078013A Fast hole-forming method for gravelly ground |
| 11/02/1993 | US5258755 Two-source magnetic field guidance system |
| 10/26/1993 | US5255960 Tunnel drilling apparatus with drill waste removal |
| 10/26/1993 | US5255959 Twin-jet process and apparatus therefor |
| 10/26/1993 | US5255750 Hydraulic drilling method with penetration control |
| 10/26/1993 | US5255749 Steerable burrowing mole |
| 10/26/1993 | US5255741 Process and apparatus for completing a well in an unconsolidated formation |
| 10/20/1993 | EP0565679A1 Method for the replacement of, in particular, sewage pipes, and a device for carrying out the method. |
| 10/19/1993 | US5253721 Directional boring head |
| 10/19/1993 | US5253708 Process and apparatus for performing gravel-packed liner completions in unconsolidated formations |
| 10/14/1993 | WO1993020371A1 Underground pipe replacement method and apparatus |
| 10/14/1993 | WO1993020325A1 Down reaming apparatus |
| 10/14/1993 | WO1993020323A1 Method and device for electrothermomechanical drilling |