| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 11/08/1994 | US5361833 Bottom set, non-retrievable whipstock assembly |
| 11/08/1994 | CA1332968C Method of positioning a feed beam provided with a rock drilling machine |
| 11/02/1994 | EP0622519A1 Remotely controlled earth excavation device |
| 11/02/1994 | CN2181561Y Hydraulic synergism elbow connection |
| 11/01/1994 | US5360292 Method and apparatus for removing mud from around and inside of casings |
| 11/01/1994 | CA1332832C Moling system |
| 10/31/1994 | CA2095306A1 Drilling kick-off device |
| 10/27/1994 | WO1994024414A1 Process and tool for laying underground collector mains for liquids and gases |
| 10/26/1994 | CN2180769Y Range changeable drill frame for engineering drilling machine |
| 10/25/1994 | US5358062 Portable handheld drilling apparatus |
| 10/25/1994 | US5358060 Successive hole boring machine and lost strike preventing device for successive hole boring machine |
| 10/25/1994 | US5358057 Modular device for collecting multiple fluid samples from soil using a cone penetrometer |
| 10/18/1994 | CA2042046C Twin-jet process |
| 10/13/1994 | DE4308654A1 Method and apparatus for reconstructing an underground pipeline |
| 10/11/1994 | US5353884 Positioning device for a member and drilling system employing said positioning device |
| 10/11/1994 | US5353883 Drilling tool of the displacing type |
| 10/11/1994 | US5353876 Method and apparatus for sealing the juncture between a verticle well and one or more horizontal wells using mandrel means |
| 10/05/1994 | CN1026144C Method of installing well conductors |
| 10/04/1994 | US5351764 For removing cuttings from a borehole |
| 09/29/1994 | WO1994021889A2 Improvements in or relating to drilling and to the extraction of fluids |
| 09/29/1994 | CA2158637A1 Improvements in or relating to drilling and the extraction of fluids |
| 09/28/1994 | EP0617193A1 Boring ram |
| 09/28/1994 | CN1092845A Mechanical deflection correcting device for lateral auger driller |
| 09/28/1994 | CN1092844A Surface casing for well completion process |
| 09/27/1994 | US5350254 Guided mole |
| 09/27/1994 | US5350028 Device for adjusting the path of a rotary drilling tool |
| 09/27/1994 | US5350027 Drill machine table |
| 09/21/1994 | CN2177791Y Semi-automatic mechanical drilling machine |
| 09/20/1994 | US5348105 Method for aligning a feeding beam in a rock drilling equipment and a rock drilling equipment and a measuring device |
| 09/20/1994 | US5348095 Method of creating a wellbore in an underground formation |
| 09/15/1994 | WO1994020730A1 Double wall pipe for propulsion technique and construction of pipe end of leading pipe |
| 09/15/1994 | WO1994020727A1 Guide assembly and method |
| 09/14/1994 | EP0614506A1 Downhole stabiliser |
| 09/14/1994 | EP0614505A1 Template and process for drilling and completing multiple wells |
| 09/13/1994 | US5346017 Method and apparatus for setting a whipstock |
| 09/07/1994 | EP0613992A1 Method for driving pipes into the ground |
| 09/07/1994 | EP0613991A1 Apparatus and for driving pipes into the ground |
| 09/07/1994 | CN1091807A Drilling machine |
| 09/06/1994 | US5343967 Apparatus for optional straight or directional drilling underground formations |
| 09/06/1994 | US5343966 Adjustable bent housing |
| 09/06/1994 | US5343964 Petroleum, gas or geothermal driling apparatus |
| 09/01/1994 | WO1994019272A1 Excavating equipment |
| 09/01/1994 | CA2155312A1 Excavating equipment |
| 08/31/1994 | EP0612912A1 Earth drilling device |
| 08/31/1994 | EP0612370A1 A steerable drilling assembly for mounting on the end of a drill string to drill a borehole in an underground formation |
| 08/31/1994 | EP0461140B1 Improvements relating to the lining of pipelines or passageways |
| 08/31/1994 | CN2175822Y Post hole driller |
| 08/30/1994 | US5342148 Method and system for developing offshore hydrocarbon reserves |
| 08/30/1994 | US5341888 Drilling tool intended to widen a well |
| 08/30/1994 | US5341887 Directional multi-blade boring head |
| 08/30/1994 | US5341886 System for controlled drilling of boreholes along planned profile |
| 08/30/1994 | US5341873 Method and apparatus for deviated drilling |
| 08/25/1994 | DE4324434C1 Process and apparatus for dewatering tailings |
| 08/25/1994 | DE4306333A1 Method and apparatus for producing stable trenches in the earth, loose rock or the like on the basis of hydraulic extraction |
| 08/24/1994 | CN2175300Y Double-rotation multi-direction horizontal drilling machine for engineering use |
| 08/24/1994 | CN1091176A Flow control type vibration-jet device for drill bit |
| 08/23/1994 | US5339914 Adjustable drilling mechanism |
| 08/23/1994 | US5339913 Well orienting tool and method of use |
| 08/23/1994 | US5339909 Apparatus for making earth bores |
| 08/17/1994 | EP0545922B1 Drilling machine table |
| 08/16/1994 | US5337843 Hole opener for the top hole section of oil/gas wells |
| 08/16/1994 | US5337839 Extending the lateral portion of a short-radius wellbore |
| 08/10/1994 | EP0531446B1 Downhole fluid motor composite torque shaft |
| 08/10/1994 | CN2173859Y Tetra-ring hydraulic tunneller |
| 08/09/1994 | US5335737 Retrievable whipstock |
| 08/04/1994 | WO1994009243A3 Retrievable whipstock system |
| 08/03/1994 | CN1090367A Drilling apparatus |
| 08/02/1994 | CA1331126C Arrangement for operating hydraulic actuating means in a rock drilling boom and the like boom construction |
| 07/27/1994 | EP0607135A1 Pulsation nozzle, for self-excited oscillation of a drilling fluid jet stream. |
| 07/26/1994 | US5332048 Method and apparatus for automatic closed loop drilling system |
| 07/21/1994 | WO1994016196A1 Method for determining borehole direction |
| 07/21/1994 | WO1994016190A1 Method and apparatus for setting a whipstock |
| 07/21/1994 | WO1994016153A1 Installation for transmitting drive power to piling, cut-off or similar devices usable under water |
| 07/21/1994 | WO1994016152A1 Submersible driving unit for underwater ramming machinery and tools |
| 07/20/1994 | EP0531336B1 Double-tube core drill for inclined drilling |
| 07/20/1994 | EP0511298B1 Drilling tool for percussive and rotary drilling |
| 07/20/1994 | CN2172342Y Disposable sealing tool for repairing oil well |
| 07/20/1994 | CN1089587A Super fluidized concrete, the method and drilling machine for pile forming using such concret |
| 07/19/1994 | US5330014 Power winch-ice auger conversion apparatus |
| 07/19/1994 | US5330007 Template and process for drilling and completing multiple wells |
| 07/13/1994 | EP0497802B1 Method for the mounting of underground pipelines |
| 07/12/1994 | US5327984 Method of controlling cuttings accumulation in high-angle wells |
| 07/12/1994 | US5327981 Ground water sampling device |
| 07/12/1994 | US5327980 Drill head |
| 07/12/1994 | US5327636 Reversible impact-operated boring tool |
| 07/06/1994 | EP0502938B1 Drilling bit irrigated by a fluid distributed by a fluidic oscillator |
| 07/06/1994 | EP0390932B1 An underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same |
| 07/05/1994 | US5325932 Stabilizer for a rock boring apparatus |
| 07/05/1994 | US5325924 Method and apparatus for locating and re-entering one or more horizontal wells using mandrel means |
| 07/05/1994 | US5325714 Steerable motor system with integrated formation evaluation logging capacity |
| 06/29/1994 | CN2170368Y Monitor for direction of perforation gun |
| 06/23/1994 | WO1994013926A1 A mole launcher and a method of operating a mole launcher |
| 06/23/1994 | CA2150697A1 A mole launcher and a method of operating a mole launcher |
| 06/22/1994 | EP0479927B1 Drill string component |
| 06/22/1994 | EP0333712B1 Drilling and winning installation for mining |
| 06/22/1994 | CN2169683Y Wet area caterpillar drill platform |
| 06/22/1994 | CN1088283A Cement soil apparatus of underground borer |
| 06/21/1994 | US5322391 Guided mole |
| 06/21/1994 | US5322139 Loose crown underreamer apparatus |
| 06/21/1994 | US5322135 Open hole coring method |