| Patents for E21B 3 - Rotary drilling (4,061) |
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| 04/04/2012 | EP2435654A2 Method and apparatus for drilling large-diameter hole in ground |
| 04/04/2012 | CN202181843U 一种油电混合多功能钻机 One kind of hybrid multi-function rig |
| 04/04/2012 | CN102400705A 高突矿井煤巷掘进防突钻冲装锚机组 Lane Tunnel Coal Mine High sudden outburst prevention drill punch unit installed anchor |
| 04/04/2012 | CN102400641A Floating device of drilling machine |
| 04/04/2012 | CN102400640A 回转机构中心调整装置及方法 Slewing mechanism centering device and method |
| 04/04/2012 | CN102400465A 一种静压中掘压桩机及静压中掘压桩施工方法 One kind of dig hydrostatic pressure machine and hydrostatic pressure in digging pile construction method |
| 04/03/2012 | CA2586317C Torque sub for use with top drive |
| 03/28/2012 | EP2235315B1 Top drive system |
| 03/28/2012 | CN102392630A rotary drilling rig and control mode thereof |
| 03/28/2012 | CN102392611A Threaded drill pipe without bringing out soil and pilling method without bringing out soil for simultaneously forming thread and smooth rod |
| 03/21/2012 | CN202170806U 构造煤发育区钻进、增透一体化装置 Tectonic coal development zone drilling, AR Integrated Device |
| 03/21/2012 | CN202170751U Handheld ground anchor drilling machine |
| 03/21/2012 | CN102383725A Drilling power device |
| 03/21/2012 | CN102383724A Multi-seal power head |
| 03/21/2012 | CN102383723A Seabed type conical investigating and drilling integrated machine |
| 03/21/2012 | CN102383722A Drilling machine |
| 03/21/2012 | CN102383721A Multi-head gripper for full-sleeve full-rotation drill |
| 03/21/2012 | CN101392630B Drill and method for operating a drill |
| 03/14/2012 | CN202165012U 一种钻探设备 A method of drilling equipment |
| 03/14/2012 | CN202165011U 组合式掏挖钻机 Combined dig drilling rig |
| 03/14/2012 | CN202165007U 一种转盘驱动装置 One kind of wheel drive |
| 03/14/2012 | CN202165006U 一种钻机动力头侧滑机构 One kind of drill head sliding mechanism |
| 03/14/2012 | CN202165005U 一种钻具及钻机 One kind of drilling and rig |
| 03/14/2012 | CN102373882A Separated self-propelled coal mine underground drill rig |
| 03/14/2012 | CN102373880A Power water tap |
| 03/14/2012 | CN102373879A Top driver |
| 03/14/2012 | CN102373705A Pile sinking device and method for outer digging pre-stressed centrifugal pipe pile and square pile |
| 03/08/2012 | WO2012028006A1 Rotary drilling rig and transmission device for power head thereof |
| 03/07/2012 | CN202157746U 简易路面钻孔机 Easy road Drills |
| 03/07/2012 | CN202157744U 转盘驱动箱集成系统 Wheel drive box integration system |
| 03/07/2012 | CN202157322U 超大扭矩螺旋钻孔灌注桩机 Bored large torque screw machine |
| 03/01/2012 | WO2012003393A3 Hand-held water drill |
| 03/01/2012 | US20120048586 Drill presses having noise reducing components |
| 02/29/2012 | EP2422041A1 Stabilizer for pipe handling equipment |
| 02/29/2012 | CN202152651U 履带式坑道钻机及其液压系统 Crawler drilling rig and hydraulic systems |
| 02/29/2012 | CN202152642U 坑道钻机及其钻进状态调整装置 Drilling rig and drilling state adjusting device |
| 02/29/2012 | CN202152630U 一种转盘驱动箱集成系统 One kind of turntable drive box integration system |
| 02/29/2012 | CN202152629U 转盘驱动装置 Wheel drive |
| 02/29/2012 | CN202152628U 一种全液压钻机的动力头让开孔口装置 A full hydraulic drilling rig power head to get out of the orifice device |
| 02/29/2012 | CN102364028A Multifunctional full-hydraulic drilling machine |
| 02/29/2012 | CN101871222B Method for controlling motion of mast oil cylinder of revolving drilling rig and system |
| 02/22/2012 | EP2126268B1 Rig engine control |
| 02/22/2012 | CN202148865U 开锁底机构、钻具及旋挖钻机 Unlock the bottom bodies, drilling and rotary drilling rig |
| 02/22/2012 | CN102362045A Helical drilling apparatus, systems, and methods |
| 02/22/2012 | CN102359346A Lunar soil deep drilling sample recycling mechanism |
| 02/22/2012 | CN101371004B 模块化的顶部驱动设备 Modular top drive apparatus |
| 02/21/2012 | US8118702 Power tool with planet type reduction gearing |
| 02/21/2012 | US8118118 Modular rotary drill head |
| 02/16/2012 | WO2011109075A9 Dual top drive systems and methods |
| 02/15/2012 | EP2013436B1 Top drive apparatus |
| 02/15/2012 | CN202144723U 挖掘机型钻机 Excavators rig |
| 02/14/2012 | US8113299 Drill mast articulation assembly |
| 02/09/2012 | WO2012018191A2 Auger with four-stage speeds |
| 02/09/2012 | US20120031679 Excavation apparatus |
| 02/08/2012 | CN202140019U 多用途岩心钻机 Multipurpose Core Drill |
| 02/08/2012 | CN202140017U 一种深井水井钻机的新型传动系统 A new deep water well drilling rig Transmission |
| 02/08/2012 | CN202140016U 减震动力头装置 Damping power head unit |
| 02/08/2012 | CN202140015U 钻机动力头 Drill head |
| 02/08/2012 | CN202140014U 一种自重式旋挖钻孔机的液压动力头 One kind of weight-type auger drill head hydraulic power |
| 02/08/2012 | CN202140013U 一种自重式旋挖钻孔机 One kind of weight-type auger drilling machine |
| 02/08/2012 | CN102345439A Full-hydraulic double-rod soft coal drilling machine |
| 02/01/2012 | EP2411621A1 Helical drilling apparatus, systems, and methods |
| 02/01/2012 | CN202131975U 一体化磨盘水龙头 Integrated disc faucet |
| 02/01/2012 | CN202131974U 煤矿瓦斯钻探器 Mine gas drilling device |
| 02/01/2012 | CN202131973U 煤矿软煤层顺层钻孔用全液压坑道钻机 Soft Coal Seam coal mine hydraulic tunnel drilling rig |
| 02/01/2012 | CN102337845A Protection method for rotary drilling rig, controller, protection device and rotary drilling rig |
| 02/01/2012 | CN101525978B 水压自动钻孔机构 Hydraulic automatic drilling agency |
| 01/26/2012 | WO2012012076A1 Continously adjusting resultant force in an excavating assembly |
| 01/25/2012 | CN202125291U Device for limiting and protecting remaining three rounds of single-layer steel wire rope of rotary drilling rig |
| 01/25/2012 | CN202125269U Rotary drilling rig and drilling tool of rotary drilling rig |
| 01/25/2012 | CN202125245U Support structure of machine frame oil cylinder of rotary drilling machine |
| 01/25/2012 | CN202125244U Well drilling earth exploration machine with function of circular water absorption |
| 01/25/2012 | CN202125243U Reducing roller Kelly bushing |
| 01/25/2012 | CN102330537A Tunnel drilling machine and hydraulic power head device thereof |
| 01/25/2012 | CN102330536A Lifting type diving rotary drilling rig with turbine pump |
| 01/18/2012 | CN202117704U High pressure prepositive water braid |
| 01/18/2012 | CN202117670U Self-traveling lifting fully-hydraulic coal auger |
| 01/18/2012 | CN202117560U Firedamp drainage drilling machine capable of quick positioning |
| 01/18/2012 | CN202117558U Closed hydraulic system of gear rack drilling machine |
| 01/18/2012 | CN202117557U Drilling machine for spring root irrigation |
| 01/18/2012 | CN202117556U Auger driller for moulding concrete piles with different depth and shapes |
| 01/18/2012 | CN102322224A Mechanical drill rod |
| 01/18/2012 | CN102322215A Power head |
| 01/18/2012 | CN102322214A Multifunctional drifting machine |
| 01/18/2012 | CN102322056A Super-large-torque spiral hole-boring and pile-pouring machine |
| 01/12/2012 | WO2011139947A3 Top drive |
| 01/11/2012 | CN202108422U Lengthening bar and long-spiral drilling machine using same |
| 01/11/2012 | CN202108415U Hydraulic power water tap for a gear rack drilling machine |
| 01/11/2012 | CN202108414U High-pressure post-positioned water swivel |
| 01/11/2012 | CN102312434A Compound screw pile and method for forming pile |
| 01/05/2012 | WO2012003393A2 Hand-held water drill |
| 01/04/2012 | CN202100206U Pneumatic multipurpose rock drilling machine |
| 01/04/2012 | CN202100199U Drilling bucket capable of opening bucket door continuously and unloading soil forcefully |
| 01/04/2012 | CN202100194U Wheeled full-rotating petrol-electric hybrid rotary drilling rig |
| 01/04/2012 | CN202100192U Spiral ground pile drilling rig |
| 01/04/2012 | CN202100190U Handheld forward/backward rotating pneumatic drill |
| 01/04/2012 | CN202100189U Miniature electrical well rig |
| 01/04/2012 | CN102305021A Experimental method for simulating dynamic mechanics characteristic of underground drilling rig of air well drilling |
| 01/04/2012 | CN102305020A Drilling system for shallow drilling |
| 01/04/2012 | CN101984191B High pressure jet grouting pile driving machine |