| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 02/08/1996 | WO1996003565A1 Method for steering a drill bit while drilling a bore hole |
| 02/07/1996 | EP0695850A2 Steerable drilling tool and system |
| 02/07/1996 | EP0695390A1 Drilling kick-off device |
| 02/07/1996 | CN1116440A Method for determining borehole direction |
| 02/06/1996 | US5488999 Drill bit for geological exploration |
| 02/06/1996 | US5488989 For use in forming a window at a wall of a well casing in a borehole |
| 02/06/1996 | CA2055030C Mobile drilling rig for closely spaced well centers |
| 01/31/1996 | EP0694675A1 Fixing and clamping tensioning device for a tow rope connected to a boring ram |
| 01/31/1996 | CN1115993A System for in situ replacement of cutting means for a ground drill |
| 01/30/1996 | US5487431 Subterranean fluid sampling systems and methods |
| 01/25/1996 | WO1996002012A1 Transmission line installation |
| 01/24/1996 | EP0693158A1 Ground displacement auger head for making piles in the ground |
| 01/23/1996 | US5486070 Method for conducting offshore well operations |
| 01/23/1996 | US5485889 Steering drill bit while drilling a bore hole |
| 01/23/1996 | CA2007070C Dry pneumatic system for hard rock shaft drilling |
| 01/18/1996 | WO1996001360A1 Soil sampler |
| 01/18/1996 | DE4441719C1 Method for cladding shaft, esp. well shaft |
| 01/18/1996 | CA2194368A1 Soil sampler |
| 01/17/1996 | EP0692606A1 Method for lining a tunnel |
| 01/17/1996 | EP0494196B1 Tunnel drilling apparatus and method to remove drill waste |
| 01/17/1996 | CN1115185A Assembly and process for drilling and completing multiple wells |
| 01/16/1996 | US5484232 Method for injecting lubricant and filler in the pipe-jacking method |
| 01/16/1996 | US5484029 Steerable drilling tool and system |
| 01/16/1996 | US5484027 Ice penetrating hot point |
| 01/16/1996 | US5484021 Method and apparatus for forming a window in a subsurface well conduit |
| 01/16/1996 | US5484017 Whipstock assembly for a sleeved casing |
| 01/16/1996 | US5483987 Remote control method and device for actuating an equipment-application to a drill string |
| 01/16/1996 | CA2055031C Method and apparatus for controlling the transfer of tubular members into a shelter |
| 01/15/1996 | CA2129590A1 Automatic leveling system for blasthole drills |
| 01/10/1996 | EP0690942A1 Process for sealing off ground sites and device for carrying out this process |
| 01/10/1996 | EP0484473B1 Drill head with nozzles |
| 01/10/1996 | CN1114710A Drilling a bore hole having a short radius curved section followed by a straight section |
| 01/09/1996 | US5482404 Underground pipe replacement technique |
| 01/09/1996 | US5482357 Plasma blasting probe assembly |
| 01/09/1996 | CA2096192C Drilling short radius curvature well bores |
| 01/04/1996 | WO1996000362A1 Method and device for replacing a pipe line laid in the ground |
| 01/04/1996 | DE4422462A1 Hollow boring tool for drilling concrete |
| 01/04/1996 | DE4421923A1 Verfahren und Vorrichtung zum Austauschen einer in der Erde verlegten Rohrleitung Method and apparatus for exchanging a pipe laid in the earth |
| 01/03/1996 | EP0690201A2 Forming casing window off whipstock set in cement plug |
| 01/02/1996 | US5480266 Tensioned riser compliant tower |
| 01/02/1996 | US5480263 Soil displacement hammer for replacing underground pipes |
| 01/02/1996 | US5479995 Adjustable orienting sub |
| 01/02/1996 | US5479994 Method of electrothermomechanical drilling and device for its implementation |
| 01/02/1996 | US5479990 Rising centralizing spider |
| 01/02/1996 | CA2058869C Primary cementing |
| 12/28/1995 | CA2152638A1 Forming casing window off whipstock set in cement plug |
| 12/27/1995 | CN2216136Y Underground boring corrector |
| 12/26/1995 | US5478170 Controlling apparatus for excavator |
| 12/26/1995 | US5477923 Wellbore completion using measurement-while-drilling techniques |
| 12/26/1995 | CA2022452C Adjustable bent housing |
| 12/21/1995 | WO1995034741A1 Hinged drilling tool |
| 12/21/1995 | WO1995034740A1 Drilling apparatus |
| 12/20/1995 | EP0516806B1 Device for remotely operating an assembly comprising a bean/needle system, and use thereof in a drill string |
| 12/20/1995 | CN2215589Y Diameter changeable agitation drill |
| 12/19/1995 | CA2007461C Whipstock starter mill with pressure drop tattletale |
| 12/14/1995 | WO1995033913A1 Method for setting a whipstock in a wellbore |
| 12/14/1995 | WO1995033910A1 Whipstock assembly |
| 12/14/1995 | DE19516438A1 Device and process for producing horizontal filtered wells |
| 12/13/1995 | EP0686752A1 Directional drilling methods and apparatus |
| 12/13/1995 | EP0686730A1 Ground boring device and method for constructing an underground wall using the same |
| 12/13/1995 | EP0578690B1 Oil, gas or geothermal drilling apparatus |
| 12/13/1995 | EP0494197B1 Control method for drilling apparatus |
| 12/12/1995 | US5474334 Coupling assembly |
| 12/12/1995 | US5474140 Soil sampling probe |
| 12/12/1995 | US5474133 Method for retreiving a slotted face wellbore deviation assembly using a retrieval tool |
| 12/12/1995 | US5474131 Method for completing multi-lateral wells and maintaining selective re-entry into laterals |
| 12/12/1995 | US5474126 Retrievable whipstock system |
| 12/12/1995 | US5474125 Retrieval tool for use with a slotted face wellbore deviation assembly |
| 12/09/1995 | CA2151212A1 Underreamer |
| 12/07/1995 | WO1995033119A1 Drilling apparatus |
| 12/07/1995 | DE4418953A1 Removal of old buried pipes for replacement |
| 12/06/1995 | EP0685628A1 Whipstock orientation method and system |
| 12/06/1995 | EP0685627A2 A modulated bias unit for rotary drilling |
| 12/06/1995 | EP0685626A2 A modulated bias unit for rotary drilling |
| 12/06/1995 | EP0685625A2 A modulated bias unit for rotary drilling |
| 12/06/1995 | EP0685624A2 A modulated bias unit for rotary drilling |
| 12/06/1995 | EP0685623A2 A rotatable pressure seal |
| 12/06/1995 | EP0685603A1 Multi-shaft excavating device |
| 12/05/1995 | US5472294 Purification |
| 12/05/1995 | US5472057 Drilling with casing and retrievable bit-motor assembly |
| 12/05/1995 | US5472049 For remediating an underground formation containing contaminated groundwater |
| 12/05/1995 | CA2150734A1 Modulated bias unit for rotary drilling |
| 12/05/1995 | CA2150732A1 Modulated bias unit for rotary drilling |
| 12/05/1995 | CA2150731A1 Modulated bias unit for rotary drilling |
| 12/03/1995 | CA2150786A1 Whipstock orientation method and system |
| 11/30/1995 | WO1995032353A1 Lateral drilling method |
| 11/30/1995 | WO1995026454A3 Curved drilling apparatus |
| 11/30/1995 | DE4436264C1 Drilling mast hinged to body and erected by power cylinders |
| 11/30/1995 | CA2191076A1 Lateral drilling method |
| 11/28/1995 | US5470132 Tunnelling head and method |
| 11/28/1995 | US5469926 Directional boring drill bit blade |
| 11/28/1995 | US5469925 Downhole tube turning tool |
| 11/28/1995 | CA2043410C Seafloor drilling apparatus |
| 11/23/1995 | WO1995031630A1 Whipstock and method for setting such a whipstock |
| 11/23/1995 | DE4433533C1 Hydraulic ram=type drill |
| 11/21/1995 | US5469155 Wireless remote boring apparatus guidance system |
| 11/21/1995 | US5467834 Method and apparatus for short radius drilling of curved boreholes |
| 11/21/1995 | US5467832 Method for directionally drilling a borehole |
| 11/21/1995 | US5467821 Rectilinear tool for use with a slotted face wellbore deviation assembly |
| 11/21/1995 | US5467820 Slotted face wellbore deviation assembly |