| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 02/06/2013 | EP2554782A2 System and methods for pulsed flow pulsed electric drilling |
| 02/06/2013 | EP2554781A2 Cooled-fluid systems and methods for pulsed-electric drilling |
| 02/06/2013 | EP2554780A2 Pulsed electric drilling systems and methods with reverse circulation |
| 02/06/2013 | EP2554779A2 Pulsed-electric drilling systems and methods with formation evaluation and/or bit position tracking |
| 02/06/2013 | EP2554778A2 Systems and Methods for Directional Pulsed Electric Drilling |
| 02/06/2013 | EP2554777A2 Systems and methods for drilling boreholes with noncircular or variable cross-sections |
| 02/06/2013 | EP2553209A1 Method for maintaining wellbore pressure |
| 02/06/2013 | EP2553205A2 Horizontal waterjet drilling method |
| 02/06/2013 | EP2553204A2 Bending of a shaft of a steerable borehole drilling tool |
| 02/06/2013 | EP2553203A2 Horizontal drilling device |
| 02/06/2013 | EP2553202A2 Method for operating a horizontal drilling device and horizontal drilling device |
| 02/06/2013 | EP2553201A2 Method for producing a horizontally drilled bore hole in the ground and horizontal drilling device |
| 02/06/2013 | CN202718629U Telescopic supporting mechanism for horizontal directional drilling machine |
| 02/06/2013 | CN202718626U Anti-collision reamer for ocean surface layer directional drilling |
| 02/06/2013 | CN202718625U Auxiliary line bracket of offshore drilling marine riser |
| 02/06/2013 | CN202718624U Foundation reinforcement stabilizing machine for solidifying beach sludge for coastal reclamation |
| 02/06/2013 | CN202718621U Anti-falling device for unit head of rotary drilling rig |
| 02/06/2013 | CN102918228A Apparatus and methods for estimating tool inclination using bit-based gamma ray sensors |
| 02/06/2013 | CN102918225A Method for operating a horizontal drilling device and horizontal drilling device |
| 02/06/2013 | CN102913253A Microtunnelling system and apparatus |
| 02/06/2013 | CN102913157A Underground sleeve rotational flow guider |
| 02/06/2013 | CN102913139A Train type translation leveling device and method |
| 02/06/2013 | CN102913133A Grouting device for casing running |
| 02/06/2013 | CN102913132A Plagioclase processing method for drilling pile near karst area of existing railway |
| 02/06/2013 | CN102913131A Dynamic point-the-bit rotary steering drilling tool |
| 02/06/2013 | CN102913130A Full-hydraulic rock-drilling excavator using hydraulic excavator for production |
| 02/06/2013 | CN102913129A Small-size agricultural well drill |
| 02/06/2013 | CN102913128A Device for improving stress and stability of rotary drilling machine |
| 02/06/2013 | CN102226396B Non-explosive mining method of excavation, artificial group-column reconstruction, long-hole caving and subsequent filling |
| 02/05/2013 | US8365841 Sectional back reamer apparatus and method for horizontal directional drilling |
| 02/05/2013 | US8365840 Method and device for controlling at least one drilling parameter for rock drilling |
| 02/05/2013 | US8365838 Valve tester suspension assembly |
| 02/05/2013 | CA2542413C Nozzle unit and method for excavating a hole in an object |
| 01/31/2013 | WO2013016296A1 Method and apparatus for vibrating horizontal drill string to improve weight transfer |
| 01/31/2013 | WO2013016282A2 Path tracking for directional drilling as applied to attitude hold and trajectory following |
| 01/31/2013 | WO2013015967A2 Whipstock assembly and method for low side exit |
| 01/31/2013 | WO2012166561A3 Compositions, methods, apparatus, and systems for incorporating bio-derived materials in drilling and hydraulic fracturing |
| 01/31/2013 | WO2012162294A3 Perforating string with magnetohydrodynamic initiation transfer |
| 01/31/2013 | WO2012088115A4 Method and apparatus for drilling a zero-radius lateral |
| 01/31/2013 | US20130029543 Power Supply System for Marine Drilling Vessel |
| 01/31/2013 | US20130025941 Methods of coating wellbore tools and components having such coatings |
| 01/31/2013 | US20130025939 System and method for controlling and monitoring a drilling operation using refined solutions from a panistic inversion |
| 01/31/2013 | US20130025937 Systems and Methods for Continuous and Near Continuous Drilling |
| 01/31/2013 | US20130025936 Ground-drilling device |
| 01/31/2013 | US20130025879 High pressure seal adapter for splitter conductor housing to wellhead connection |
| 01/31/2013 | US20130025864 Whipstock assembly and method for low side exit |
| 01/31/2013 | DE102011109001A1 Drilling equipment for boring holes in foundation pile for e.g. building, has tool or intermediate piece extended through transverse bore, and another transverse bore arranged in middle part of walls in relation to cross section of rod |
| 01/31/2013 | DE102011108999A1 Aufnahme für rohrförmige Bohrwerkzeuge mit verschiedenen Durchmessern Recording for tubular drilling tools with different diameters |
| 01/31/2013 | CA2841156A1 Whipstock assembly and method for low side exit |
| 01/30/2013 | CN202708073U Rotary body sealing device and rotary bit of horizontal directed drilling rig |
| 01/30/2013 | CN202707431U Air supply exchange system of reef explosion ship underwater drill air compressors |
| 01/30/2013 | CN202706916U Well-drilling device |
| 01/30/2013 | CN202706915U Low-speed rotary and torsional vibration type power device |
| 01/30/2013 | CN202706914U Impulse jet flow assisting drilling tool |
| 01/30/2013 | CN202706913U Slide-type anchoring device |
| 01/30/2013 | CN202706912U Integral push unit of drilling machine |
| 01/30/2013 | CN202706911U Double power fully hydraulic long auger drilling machine |
| 01/30/2013 | CN202706088U 多功能工程作业机 Multifunction machine engineering work |
| 01/30/2013 | CN202704886U Turning locking device and engineering machinery |
| 01/30/2013 | CN102900368A Jet flow hole drilling machine |
| 01/30/2013 | CN102900367A Methods for drilling in cylinder of semi-finished vertical shaft and discharging water from cylinder of gangue-removal vertical shaft |
| 01/30/2013 | CN102900366A Free trajectory planning and deviation correcting method of horizontal directional drill |
| 01/30/2013 | CN102900365A Embedded type system-based control device for horizontal directional drill |
| 01/30/2013 | CN102900364A Static pointing type rotary guiding drilling tool |
| 01/30/2013 | CN102900363A Caterpillar chassis, rotary drilling rig and transportation method of caterpillar chassis |
| 01/30/2013 | CN102900362A Narrow-machine-body full-hydraulic bolt and anchor cable drill carriage for coal mine tunnel |
| 01/30/2013 | CN102900361A Rotary drilling rig and construction method thereof |
| 01/30/2013 | CN102900360A Combined type digging and drilling machine |
| 01/30/2013 | CN102155257B Benching drilling pressure releasing and outburst-prevention method |
| 01/30/2013 | CN101906988B Remote-control underground gas extraction drilling machine |
| 01/30/2013 | CN101253308B User interface for rock drilling rig |
| 01/29/2013 | US8360173 Positive engagement underreamer and method |
| 01/29/2013 | US8360172 Steering device for downhole tools |
| 01/29/2013 | US8360171 Directional drilling control apparatus and methods |
| 01/29/2013 | US8360169 Apparatuses and methods relating to cooling a subterranean drill bit and/or at least one cutting element during use |
| 01/29/2013 | CA2683763C Full bore lined wellbores |
| 01/29/2013 | CA2569323C Rock drilling rig, service platform connected to a rock drilling rig and a roof for a service platform |
| 01/29/2013 | CA2519019C Method and apparatus for drilling a borehole with a borehole liner |
| 01/24/2013 | WO2013012684A1 An apparatus and system to remove debris from a laser-extended bore section |
| 01/24/2013 | WO2012162537A3 Jet arrangement on an expandable downhole tool |
| 01/24/2013 | WO2012119092A3 Synthetic formation evaluation logs based on drilling vibrations |
| 01/24/2013 | WO2012007756A3 Two-port percussion mole |
| 01/24/2013 | US20130020133 Multi-axis modulation of cutters |
| 01/24/2013 | US20130020132 Downhole Motors with a Lubricating Unit for Lubricating the Stator and Rotor |
| 01/24/2013 | US20130020129 Methods for directing vertical drilling |
| 01/24/2013 | CA2841959A1 An apparatus and system to remove debris from a laser-extended bore section |
| 01/23/2013 | CN202689936U Water power hydraulic vibrator |
| 01/23/2013 | CN202689935U Hydraulic vibrator for drilling |
| 01/23/2013 | CN202689934U Underground vibration damper |
| 01/23/2013 | CN202689933U Centrifugal underground pressurizer |
| 01/23/2013 | CN202689932U Positive displacement underground supercharger |
| 01/23/2013 | CN202689931U Novel deep sea automatic extension rod pressure maintaining sampling drill |
| 01/23/2013 | CN202689930U Drill-close full-rotating vertically drilling tool |
| 01/23/2013 | CN202689929U Oriented drilling tool for shale gas development |
| 01/23/2013 | CN202689928U Drilling tool capable of controlling angle of horizontal hole |
| 01/23/2013 | CN202689927U Multifunctional moving trolley for rock drilling machine |
| 01/23/2013 | CN202689926U Folding arm rock drill rig with automatic drill rod replacement device |
| 01/23/2013 | CN102892970A Methods and systems for drilling |
| 01/23/2013 | CN102889056A Drill bushing drilling device for petroleum drilling |
| 01/23/2013 | CN102889055A Water drilling anti-sputtering safety cover |