| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 09/23/2004 | WO2004081333A2 A method and apparatus for a downhole excavation in a wellbore |
| 09/23/2004 | WO2003106130A3 Collapsible expansion cone |
| 09/23/2004 | US20040184885 Method of accurate trenchless installation of underground pipe |
| 09/23/2004 | US20040182607 Method of forming concrete pilings using a reverse circulation drilling system |
| 09/23/2004 | US20040182569 Apparatus for expanding a tubular member |
| 09/23/2004 | CA2518938A1 Determination of the orientation of a downhole device |
| 09/21/2004 | US6793442 Device and method for trenchless replacement of underground pipe |
| 09/21/2004 | US6793024 Rock drilling rig |
| 09/21/2004 | CA2426336C Method for forming a window in a tubular and apparatus for use in said method |
| 09/21/2004 | CA2242641C Arrangement for leading flexible elements to a rock drill, and a hose reel structure |
| 09/16/2004 | WO2004079196A2 Hydraulically-operated control system for a screw compressor |
| 09/16/2004 | WO2004079151A2 Drilling with casing latch |
| 09/16/2004 | WO2004079150A2 Full bore lined wellbores |
| 09/16/2004 | WO2004079149A2 Subsea well workover system and method |
| 09/16/2004 | WO2004079147A2 Method and apparatus for drilling with casing |
| 09/16/2004 | US20040178004 Multi-functional drilling vehicle |
| 09/16/2004 | US20040178002 Method and apparatus for drill position management |
| 09/16/2004 | US20040177953 Expander for expanding a tubular element |
| 09/16/2004 | DE10297287T5 Richtkeil für ein Futterrohr Whipstock for a liner |
| 09/16/2004 | CA2683763A1 Full bore lined wellbores |
| 09/15/2004 | CN1529787A Steel pipe for use as embedded expandedpipe, and method of embedding oil-well steel pipe |
| 09/15/2004 | CN1529034A Deep-sea coring device with prefeed and prepositioning unit |
| 09/15/2004 | CN1529033A Dual-guide dual-hydroaulic cylinder deep-sea core drilling machine |
| 09/15/2004 | CN1528987A Spine-like bored concrete pile construction technique and extrusion shaping machine thereof |
| 09/14/2004 | US6791848 Autobias driving a high frequency power system |
| 09/14/2004 | US6789981 Riser tensioning construction |
| 09/14/2004 | US6789635 Drill bit for directional drilling in cobble formations |
| 09/10/2004 | WO2004076804A1 Drill shoe |
| 09/09/2004 | US20040173383 Apparatus and method for rotary bored drilling |
| 09/09/2004 | US20040173381 Three-dimensional steering tool for controlled downhole extended-reach directional drilling |
| 09/09/2004 | US20040173379 Hydraulically-operated control system for a screw compressor |
| 09/09/2004 | US20040173355 Apparatus and methods for expanding tubulars in a wellbore |
| 09/09/2004 | DE10297180T5 Verfahren und Vorrichtung zum Ersetzen von unterirdischen Rohren Method and apparatus for replacing underground pipes |
| 09/08/2004 | EP1454030A1 A boring head and a roller cutter and a saddle for a boring head for rotary drilling |
| 09/08/2004 | EP1454029A1 Fluid drilling head |
| 09/08/2004 | EP0759117B2 Device for driving a tunnel or drain pipe |
| 09/08/2004 | CN2639507Y Device for reducing torque consumption of rod for large displacement drilling |
| 09/08/2004 | CN2639502Y Universal concrete drilling machine |
| 09/07/2004 | US6786283 Methods and associated apparatus for drilling and completing a wellbore junction |
| 09/07/2004 | US6786282 Milling apparatus and method for a well |
| 09/02/2004 | WO2004074732A1 Method for replacing pipes |
| 09/02/2004 | WO2004074626A1 Telescopic feed beam for rock drill and method of measuring rock drill travel |
| 09/02/2004 | WO2004011836A3 Apparatus and method to complete a multilateral junction |
| 09/02/2004 | US20040168831 Drilling device for earth drill |
| 09/02/2004 | US20040168799 Apparatus and method for completing an interval of a wellbore while drilling |
| 09/02/2004 | DE202004005696U1 Method for temporary localised lowering of water table has vertical lances to remove underground water which is passed through a filtration system and injected back into water bearing strata away from the working site |
| 09/02/2004 | DE10306965A1 Verfahren zum Auswechseln von Rohren A method of replacing pipes |
| 09/01/2004 | EP1451438A1 Drilling mast with movable and fixed unscrewing vice |
| 09/01/2004 | CN2637701Y Pipe tracking boosting impact device |
| 09/01/2004 | CN2637700Y Drilling underreaming device |
| 09/01/2004 | CN1164835C Device for releasing gear-rack stop piece of drill-frame support |
| 08/26/2004 | WO2004072437A1 Downhole tool |
| 08/26/2004 | WO2004072434A2 Methods and apparatus for wellbore construction and completion |
| 08/26/2004 | WO2003042487B1 Mono diameter wellbore casing |
| 08/26/2004 | US20040164740 Bore location system |
| 08/26/2004 | US20040163850 Boring tool tracking/guiding system and method with unconstrained target location geometry |
| 08/26/2004 | CA2760504A1 Methods and apparatus for wellbore construction and completion |
| 08/26/2004 | CA2514534A1 A downhole tool with an axial drive unit |
| 08/25/2004 | CN2635891Y Reaming machine for pile hole |
| 08/25/2004 | CN2635890Y Drilling followed reamer |
| 08/24/2004 | CA2278080C Formation pressure measurement with remote sensors in cased hole |
| 08/24/2004 | CA2191410C Thru tubing bridge plug and method |
| 08/19/2004 | WO2004070161A1 Drill column |
| 08/19/2004 | WO2004070159A2 Apparatus and methods for drilling a wellbore using casing |
| 08/19/2004 | WO2004051004A3 Method and apparatus for sub-sea pile-driving |
| 08/19/2004 | WO2003067018A3 Well system |
| 08/19/2004 | US20040159466 Apparatus and methods for forming a lateral wellbore |
| 08/19/2004 | DE10302194B3 Vorrichtung und Verfahren zum Einziehen einer Leitung oder eines Bohrwerkzeugs in einen Kanal Apparatus and method for pulling a pipe or of a drilling tool into a channel |
| 08/19/2004 | DE10145603B4 Vorrichtung und Verfahren zum Kanalaufweiten oder -zerstören Apparatus and method for Kanalaufweiten or -zerstören |
| 08/19/2004 | CA2808302A1 Apparatus and methods for drilling a wellbore using casing |
| 08/19/2004 | CA2725717A1 Apparatus and methods for drilling a wellbore using casing |
| 08/18/2004 | EP1447521A2 Method of consolidation, impermeabilisation and drainage of underground works by guided perforations |
| 08/18/2004 | EP1446550A1 Early hydrocarbon production system |
| 08/18/2004 | EP1386386B1 Downhole torque-generating and generator combination apparatus |
| 08/17/2004 | US6776246 Apparatus and method for simultaneously locating a fixed object and tracking a beacon |
| 08/17/2004 | US6776242 Pneumatic post driver |
| 08/12/2004 | WO2004067903A1 Valve and method for drilling with casing using pressurized drilling fluid |
| 08/12/2004 | WO2004067899A1 Method and apparatus for raise bore drilling and lining a bore hole |
| 08/12/2004 | WO2004067898A2 Integrated mast and top drive for drilling rig |
| 08/12/2004 | WO2003086042A9 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device |
| 08/12/2004 | US20040154833 Long range data transmitter for horizontal directional drilling |
| 08/12/2004 | US20040154831 Systems for deep resistivity while drilling for proactive geosteering |
| 08/12/2004 | US20040154809 Method and apparatus for operations in underground/subsea oil and gas wells |
| 08/12/2004 | CA2511118A1 Integrated mast and top drive for drilling rig |
| 08/12/2004 | CA2418717A1 Apparatus for controlling a downhole drilling motor assembly |
| 08/11/2004 | EP1328458B1 Excavating tool having a device for transporting particles of magnetic material |
| 08/11/2004 | CN2632285Y Vibrating gravel drilling machines |
| 08/11/2004 | CN2632284Y Liftable gravel drilling machine |
| 08/11/2004 | CN1519455A Equipment prevents a vertical drilling well from deflexion |
| 08/10/2004 | US6772847 Hydrochloric acid, formic acid, acetic acid, or combinations thereof |
| 08/05/2004 | WO2004065839A1 Modular pipe breaking assembly and method |
| 08/05/2004 | WO2004065835A2 Connection assembly for directional drilling |
| 08/05/2004 | WO2004065751A1 Short radium whipstock system |
| 08/05/2004 | WO2004053935A3 High power umbilicals for electric flowline immersion heating of produced hydrocarbons |
| 08/05/2004 | WO2004044366A3 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 08/05/2004 | WO2004033840A3 Methods and apparatus for open hole drilling |
| 08/05/2004 | WO2004016899A3 Horizontal spool tree wellhead system and method |
| 08/05/2004 | WO2003104603A3 New and improved method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores |
| 08/05/2004 | WO2003042489A3 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 08/05/2004 | US20040149454 Downhole sealing |