| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 06/21/2012 | US20120152620 Device and method for protecting the rock drilling machine from corrosion |
| 06/21/2012 | US20120152619 Apparatus and method for position-sensitive pipe provisioning in top-drive drilling |
| 06/20/2012 | EP2464807A1 Resonance enhanced rotary drilling |
| 06/20/2012 | CN202280425U 上下悬挂式自动防斜钻井工具 Hanging down automatic anti oblique drilling tools |
| 06/20/2012 | CN202280424U 上悬挂式自动防斜钻井工具 Hanging on automatic anti-oblique drilling tools |
| 06/20/2012 | CN102505918A Rotary dragging reaming device |
| 06/20/2012 | CN102505917A Novel structural underground hydraulic rotary drilling well drill |
| 06/20/2012 | CN101629472B Radially horizontal well casing pipe hole opening technology |
| 06/20/2012 | CN101619654B Pulse fracturing sand injector for horizontal wells |
| 06/20/2012 | CN101200994B Method and apparatus for creating a borehole in the ground |
| 06/19/2012 | US8201643 System and method for longitudinal and lateral jetting in a wellbore |
| 06/19/2012 | US8201641 Vibrating downhole tool and methods |
| 06/19/2012 | US8201640 Method in respect of a percussive device, percussive device and rock drilling machine |
| 06/14/2012 | WO2012078304A2 Methods to manufacture downhole tools with finished features as an integral cage |
| 06/14/2012 | WO2012054440A3 Offshore tower for drilling and/or production |
| 06/14/2012 | WO2012047863A3 Remotely controlled apparatus for downhole applications and related methods |
| 06/14/2012 | WO2012037452A3 Reservoir navigation using magnetic field of dc currents |
| 06/14/2012 | US20120145463 Methods and apparatus for drilling, completing and configuring u-tube boreholes |
| 06/14/2012 | US20120145462 System and Method for Directional Drilling |
| 06/14/2012 | US20120145460 Vertical drilling system for controlling deviation |
| 06/14/2012 | US20120145458 Rotary steerable drilling system |
| 06/14/2012 | DE112010003039T5 Schleifringvorrichtung für ein lenkbares Drehwerkzeug Slip-ring assembly for a steerable rotary tool |
| 06/14/2012 | CA2820390A1 Vibration transmission and isolation |
| 06/14/2012 | CA2819932A1 Resonance enhanced rotary drilling module |
| 06/13/2012 | EP2462304A2 Drilling rig with hinged, retractable outriggers |
| 06/13/2012 | CN202273590U 导管锤击器 Hammering catheter device |
| 06/13/2012 | CN202273589U 套管驱动矛 Drive casing spear |
| 06/13/2012 | CN202273588U 水力增压短节 Hydraulic booster short section |
| 06/13/2012 | CN202273587U 钻孔射流式煤层割缝系统 Drilling jet coal slotting system |
| 06/13/2012 | CN1930361B A method and operation device for establishing a drilling of an underground well, and arranging dilatable shell or sand sieve and well completion pipe in the drilling |
| 06/13/2012 | CN102493794A Coal bed methane exploring method of spraying gas-water mixed liquid to drill well and forming quincunx radial horizontal well |
| 06/13/2012 | CN102493790A Method for increasing yield of coal bed gas |
| 06/13/2012 | CN102493768A High-frequency pulsed jet flow resonance well drilling device and well drilling method thereof |
| 06/13/2012 | CN102493767A Gas well-drilling erosion experiment method |
| 06/13/2012 | CN102493766A Borehole track control method and borehole track control system |
| 06/13/2012 | CN102493765A Spiral hammer |
| 06/13/2012 | CN102493764A Integrated drilling machine capable of being quickly detached and hung on excavator working arm |
| 06/13/2012 | CN102493763A Robot imitating earthworm to penetrate into earth |
| 06/13/2012 | CN102493438A Continuous multi-shaft cement mixing pile device and construction method |
| 06/13/2012 | CN101909826B Drill stand |
| 06/13/2012 | CN101029560B Wellbottom rock-fragment abrasive jet-flowing drilling tool |
| 06/12/2012 | US8197644 Remotely controlled decoking tool used in coke cutting operations |
| 06/12/2012 | US8196680 Perforating and jet drilling method and apparatus |
| 06/12/2012 | CA2661851C A method for reaming in the construction of a well |
| 06/12/2012 | CA2531330C Device for transporting particles of a magnetic material and tool comprising such a device |
| 06/07/2012 | WO2012075289A1 Pipe shuttle for a directional drilling apparatus |
| 06/07/2012 | WO2012074928A2 Bottom preventer for use in a drilling system |
| 06/07/2012 | WO2012072870A1 Method for controlling drilling unit of rock drilling rig, and rock drilling rig |
| 06/07/2012 | WO2012072720A1 Method and system for radially expanding a tubular element |
| 06/07/2012 | WO2012028974A3 System and method for conducting operations to subterranean formations |
| 06/07/2012 | US20120138327 Drilling rig with hinged, retractable outriggers |
| 06/07/2012 | US20120138301 Controllably Installed Multilateral Completions Assembly |
| 06/07/2012 | US20120138298 Methods and apparatus for wellbore construction and completion |
| 06/07/2012 | CA2819639A1 Bottom preventer for use in a drilling system |
| 06/07/2012 | CA2817845A1 Method for controlling drilling unit of rock drilling rig, and rock drilling rig |
| 06/06/2012 | EP2460972A1 Method and system for radially expanding a tubular element |
| 06/06/2012 | EP2459837A1 Earth drilling machine |
| 06/06/2012 | CN202266259U 两臂顶帮锚杆锚索施工钻车升降平台上的脚踏翻板装置 Top arms flap means to help foot drill bolt and cable car construction lifting platform |
| 06/06/2012 | CN102486083A Well drilling corrector |
| 06/06/2012 | CN101429850B Branching well seat suspension liner tube hydraulic booster expansion system |
| 06/05/2012 | US8193124 Emulsifier free oil-based wellbore fluid |
| 06/05/2012 | US8191654 Methods of drilling using differing types of cutting elements |
| 06/05/2012 | US8191653 System and method for tracking and maintaining an on-grade horizontal borehole |
| 06/05/2012 | US8191652 Directional control drilling system |
| 06/05/2012 | US8191650 Hydrating drive shoe |
| 06/05/2012 | CA2658201C A method and a device for directional control of a rock drilling machine |
| 06/03/2012 | CA2725495A1 Monitored filament insertion resitivity test |
| 05/31/2012 | WO2012071407A2 C-semi with minimum hydrodynamic forces |
| 05/31/2012 | WO2012071055A1 Wellbore operations, system, and methods with mcnano devices |
| 05/31/2012 | WO2012047693A3 Formation sensing and evaluation drill |
| 05/31/2012 | WO2012044127A3 Punching device having head part |
| 05/31/2012 | WO2012037458A3 Apparatus and methods for drilling wellbores by ranging existing boreholes using induction devices |
| 05/31/2012 | US20120132470 Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumps |
| 05/31/2012 | US20120132469 Reamer |
| 05/31/2012 | US20120132466 Pressure Pulse Fracturing System |
| 05/31/2012 | US20120132424 Method of drilling from a shaft for underground recovery of hydrocarbons |
| 05/30/2012 | EP2456947A2 Offshore drilling system |
| 05/30/2012 | CN202250071U Dual-purpose drilling and loading machine of tunnel |
| 05/30/2012 | CN202249820U High-efficient wear-resistant lengthened pressure-reducing centralizer |
| 05/30/2012 | CN202249812U Drill rod capable of directional drilling and signal transmission |
| 05/30/2012 | CN202249795U Hydraulic drilling machine |
| 05/30/2012 | CN202249765U Resonant well drilling device |
| 05/30/2012 | CN202249764U Deflection-preventing and fast drilling equipment for completion of deep well |
| 05/30/2012 | CN202249763U Inside clamping-type top driving device for run casing |
| 05/30/2012 | CN202249762U Multi-spray-nozzle seam cutting drill bit |
| 05/30/2012 | CN202249761U Ultra-short stabilizer |
| 05/30/2012 | CN202249760U Propeller for pneumatic rock drilling jumbo |
| 05/30/2012 | CN202249759U Longitudinally and transversely moving guide rail structure of main machine of drilling machine |
| 05/30/2012 | CN202249758U Quick detachable heat-preservation shed of low-temperature vehicle-mounted drilling machine main carrying vehicle |
| 05/30/2012 | CN202249757U Drilling machine of tractor |
| 05/30/2012 | CN202249739U Power head sliding mechanism of horizontal directional drilling machine |
| 05/30/2012 | CN102483271A 地下连续环路热交换器、利用其的制造方法以及进行加热、冷却或存储能量的方法 Underground continuous loop heat exchanger, using its manufacturing method as well as heating, cooling, or a method of storing energy |
| 05/30/2012 | CN102477845A 一种用于超短半径水平井的钻井方法 A short radius horizontal well drilling method used |
| 05/30/2012 | CN102477844A 环空充气法欠平衡钻井工艺 Annulus inflatable France underbalanced drilling technology |
| 05/30/2012 | CN101831906B Dry type pneumatic rock drilling pile-driving machine and working method thereof |
| 05/30/2012 | CN101469601B Automatic relief arrangement |
| 05/30/2012 | CN101438025B Equipment and method for selective determination of bit face orientation |
| 05/30/2012 | CN101408094B Combined sand-washing well repairing machine |
| 05/30/2012 | CN101403279B Well bottom booster pump |
| 05/30/2012 | CN101343991B Well completion method of single inner diameter well completion structure |