| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 05/20/2009 | CN201241618Y Novel rotating blowout preventer |
| 05/20/2009 | CN201241617Y Drilling and slag-discharging interlock control device of mining drill |
| 05/20/2009 | CN101438025A Bit face orientation control in drilling operations |
| 05/20/2009 | CN101435314A Non-rotating outer liner stabilizing device of rotating guide drilling tool |
| 05/20/2009 | CN101435312A Multifunctional hammer drill |
| 05/19/2009 | US7534744 Method and composition for preventing or treating lost circulation |
| 05/19/2009 | CA2450899C Method and apparatus for movement of drilling equipment between adjacent locations |
| 05/19/2009 | CA2400991C Foundation for suction in installation of conductor casing |
| 05/14/2009 | WO2009060049A1 Outer pipe sleeve for sea floor mooring pile |
| 05/14/2009 | WO2009018559A3 Downhole applications of composites having aligned nanotubes for heat transport |
| 05/14/2009 | US20090120693 Earth-boring tools attachable to a casing string and methods for their manufacture |
| 05/14/2009 | US20090120691 Systems and methods for guiding the drilling of a horizontal well |
| 05/14/2009 | US20090120688 Method of attachment of a towing anchor to an iceberg |
| 05/14/2009 | US20090120637 Tagging a Formation for Use in Wellbore Related Operations |
| 05/13/2009 | EP2057344A1 A method for reaming in the construction of a well |
| 05/13/2009 | CN201236631Y Auxiliary positioning device for drilling |
| 05/13/2009 | CN201236629Y Underwater confining pressure-resistant flexible heat preserving belt |
| 05/13/2009 | CN201236628Y Anti-slanting drill means |
| 05/13/2009 | CN201236627Y Oil field well workover operation machine |
| 05/13/2009 | CN201236626Y Hydraulic bearing walking device |
| 05/13/2009 | CN201236625Y Hand-hold project drill expanding butt strap |
| 05/13/2009 | CN201236623Y Energy-saving generator apparatus |
| 05/13/2009 | CN101429857A Design method for maximum torque of well drilling seat suspension liner tube |
| 05/13/2009 | CN101429850A Branching well seat suspension liner tube hydraulic booster expansion system |
| 05/13/2009 | CN101429849A Design method for branching well seat suspension system expanding prick |
| 05/13/2009 | CN101429848A Method apparatus and for hydraulic jet side drilling radial branching borehole |
| 05/13/2009 | CN101429847A Oil field well workover operation machine |
| 05/13/2009 | CN101429846A Hydraulic bearing walking device |
| 05/13/2009 | CN101429845A Method for electric coal drill using electric hand drill bit by utilization of special-shaped drilling rod |
| 05/12/2009 | US7530408 Method of consolidating an underground formation |
| 05/12/2009 | US7530406 Method of drilling using pulsed electric drilling |
| 05/12/2009 | US7530398 Method and apparatus for a cold flow subsea hydrocarbon production system |
| 05/12/2009 | CA2438139C Downlink telemetry system |
| 05/08/2009 | CA2641637A1 Method of attachment of a towing anchor to an iceberg |
| 05/07/2009 | WO2009058508A2 Drilling assemblies and methods of drilling |
| 05/07/2009 | WO2009056329A2 Method and device for testing the coating of a pipeline while laying the pipeline in a liquid-filled borehole |
| 05/07/2009 | WO2009039453A3 Directional drilling control |
| 05/07/2009 | WO2009039448A3 Automated directional drilling apparatus and methods |
| 05/07/2009 | US20090114450 Controlled Variable Density Fluid for Wellbore Operations |
| 05/07/2009 | US20090114449 Acid tunneling bottom hole assembly and method utilizing reversible knuckle joints |
| 05/07/2009 | US20090114448 Expandable roller reamer |
| 05/07/2009 | US20090114446 Well drilling machine with new drill pipe loader |
| 05/07/2009 | US20090114443 Anchored riserless mud return systems |
| 05/07/2009 | US20090114409 Pneumatic impact tool |
| 05/07/2009 | US20090114402 Method and Device for Drilling, Particularly Percussion or Rotary Percussion Drilling ,a Hole in Soil or Rock Material |
| 05/07/2009 | DE102007050931A1 Überbohrkopf zum Verdrängen des eine Leitung umgebenden Erdreiches und Verfahren zum Überbohren Over head for displacing the surrounding soil line and method for transferring drilling |
| 05/06/2009 | EP2054581A1 Sensor system |
| 05/06/2009 | CN101424166A Special horizontal well track control method for oil reservoir with top water and edge water |
| 05/06/2009 | CN101424165A Borehole block-resistant drilling tool |
| 05/06/2009 | CN100485132C Formative method for row-pile style water-proof wall underground |
| 05/05/2009 | US7527108 Portable electrocrushing drill |
| 05/05/2009 | CA2472639C Adjustable bent housing |
| 05/01/2009 | CA2642416A1 Expandable roller reamer |
| 04/30/2009 | WO2009055381A2 Apparatus and method for conveyance and control of a high pressure hose in jet drilling operations |
| 04/30/2009 | WO2009055380A2 Apparatus and method for milling casing in jet drilling applications for hydrocarbon production |
| 04/30/2009 | WO2009053343A2 Method of radially expanding a tubular element in a wellbore provided with a control line |
| 04/30/2009 | WO2007064591A3 Wellbore motor having magnetic gear drive |
| 04/30/2009 | WO2006023998A3 Pulsed electric rock drilling, fracturing, and crushing methods and apparatus |
| 04/30/2009 | US20090107675 Liner Drilling and Cementing System Utilizing a Concentric Inner String |
| 04/30/2009 | DE102007051596A1 Drill head for drill rod of earth drilling device, has central area with diameter gradually decreasing from central part towards drilling head tip and drilling top end, and cylindrical section provided within range of drilling head tip |
| 04/30/2009 | DE102007049605B3 Verfahren und Vorrichtung zum Einziehen eines aus Kurzrohren zusammengesetzten Rohrstranges in einen Bohrkanal mit Zugkraftmessung Method and apparatus for feeding a composite of short tubes tubing into a drill hole with tension measurement |
| 04/30/2009 | CA2701725A1 Apparatus and method for milling casing in jet drilling applications for hydrocarbon production |
| 04/29/2009 | EP2053197A2 Rotating blow out preventer |
| 04/29/2009 | CN201228521Y Safety device for preventing boring rod from breaking for rotary drilling rig |
| 04/29/2009 | CN101421483A Electromagnetically determining the relative location of a drill bit using a solenoid source installed on a steel casing |
| 04/29/2009 | CN101418672A Method for using borehole block-resistant drilling tool |
| 04/29/2009 | CN101418671A Dustproof application of foam for bore hole at surface of buildings and blowing machine used thereby |
| 04/28/2009 | CA2527161C Toolguide for creating deviated borehole branches from a well bore |
| 04/28/2009 | CA2526877C Whipstock for mounting in a casing section |
| 04/23/2009 | WO2009049470A1 A bored pile drilling machine |
| 04/23/2009 | WO2006116632A3 Conductor pipe string deflector and method of using same |
| 04/23/2009 | US20090101414 Apparatus and Method for Conveyance and Control of a High Pressure Hose in Jet Drilling Operations |
| 04/23/2009 | US20090101412 Drill-string shock absorbers |
| 04/23/2009 | US20090101345 Liner Drilling System with Retrievable Bottom Hole Assembly |
| 04/23/2009 | US20090101332 Method and apparatus for drilling with casing |
| 04/23/2009 | CA2701169A1 Systems, methods, and processes utilized for treating subsurface formations |
| 04/22/2009 | EP2050920A2 Method and device to pull a pipeline comprised of short pipes into a boring channel |
| 04/22/2009 | EP2050919A2 Method and device to pull a pipeline comprised of short pipes into a boring channel with measurement of pulling power |
| 04/22/2009 | CN201225094Y Air drilling trimmer |
| 04/22/2009 | CN201225093Y Drilling fluid force reducing stabilizer |
| 04/22/2009 | CN201225092Y Double-cylinder hydraulic pressure injection guide inclined machine for opening window by sidetrack |
| 04/22/2009 | CN201225091Y Inclined slope pile drilling machine |
| 04/22/2009 | CN201225090Y Engineering water drill |
| 04/22/2009 | CN101413384A Method for implementing branch well window seal by using metal expansion tube |
| 04/22/2009 | CN101413380A Multifunctional self-oscillation flow jet flow drill |
| 04/22/2009 | CN101413379A Dual-channel double-face emptying flow injection element |
| 04/22/2009 | CN101413378A Self-contained system for drilling a drainhole |
| 04/21/2009 | CA2532314C Method of heat drilling of holes in ice and apparatus for carrying out the method |
| 04/16/2009 | WO2009023222A3 Buoyancy tensioning systems for offshore marine risers and methods of use |
| 04/16/2009 | WO2005050257A3 High temperature imaging device |
| 04/16/2009 | US20090095535 using the drilling composition to drill a portion of the well bore, the consolidating material penetrating into the walls of the well bore, and consolidating a portion of the formation particulates;.crosslinking polymers bonding only at the points of contact between particles and not sealing across |
| 04/16/2009 | US20090095533 Self-contained system for drilling a drainhole |
| 04/16/2009 | US20090095532 Self sharpening cutting structure for expandable earth boring apparatus using impregnated and matrix materials |
| 04/16/2009 | US20090095530 Systems and methods for guiding the drilling of a horizontal well |
| 04/16/2009 | US20090095527 Devices and Methods for Power Control in Horizontal Directional Drilling |
| 04/16/2009 | US20090095526 Method and Apparatus for Managing Rod Changes in Horizontal Directional Drill |
| 04/16/2009 | US20090095489 Apparatus for gripping a downhole tubular |
| 04/16/2009 | CA2641395A1 Stand-alone drainage hole drilling system |
| 04/15/2009 | EP2048321A1 Drill and method for operating a drill |
| 04/15/2009 | CN201221315Y Rotary guiding device of well drilling machine |