| Patents for E21B 3 - Rotary drilling (4,061) |
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| 06/20/2012 | CN202280419U Smw工法施工用新型五轴钻孔机 Smw construction method with the new five-axis drilling machine |
| 06/20/2012 | CN102506100A Hydraulic brake device |
| 06/20/2012 | CN102505918A Rotary dragging reaming device |
| 06/20/2012 | CN102505917A Novel structural underground hydraulic rotary drilling well drill |
| 06/13/2012 | CN202273585U Unit head of full screw earth auger |
| 06/13/2012 | CN102493797A Remote monitor terminal, operating method decision system, method thereof and rotary drilling rig |
| 06/13/2012 | CN102493765A Spiral hammer |
| 06/13/2012 | CN102493762A Rectangular cast-in-place pile slotting combined drilling rig |
| 06/07/2012 | US20120138367 Drill string component for noise control during percussion drilling |
| 06/07/2012 | US20120138366 Method for Cooling a Rotating Control Head |
| 06/06/2012 | CN202266192U 石油钻机用转盘水平轴自润滑装置 Oil rig with turntable horizontal axis self-lubricating device |
| 06/06/2012 | CN202266191U 一种后盖板式旋挖钻机动力头 One kind of cover plate auger drill head |
| 06/06/2012 | CN202266190U 人力冻土钻具 Human permafrost drill |
| 06/05/2012 | CA2646012C Seal assembly for use in a top drive |
| 06/03/2012 | CA2725495A1 Monitored filament insertion resitivity test |
| 05/30/2012 | CN202250029U Hydraulic control system for power head of rotary drilling jig and rotary drilling jig |
| 05/30/2012 | CN202250026U Soil unloading control system for power head of rotary drilling rig and rotary drilling rig |
| 05/30/2012 | CN202249796U Connecting device for rotary drilling machine |
| 05/30/2012 | CN202249751U Dual drive rotary table device used for oil drilling rig |
| 05/30/2012 | CN202249750U Power source conveying device of hydraulic drilling machine |
| 05/30/2012 | CN202249749U Rotary support and driven gear integrated power head |
| 05/30/2012 | CN202249748U Integrated power head with hub and key sleeve |
| 05/30/2012 | CN202249747U Power head |
| 05/30/2012 | CN202249746U Multi-sealing power head |
| 05/30/2012 | CN202249745U Power head without separate input shaft |
| 05/30/2012 | CN202249744U Hydraulic pump station for long spiral drilling machine |
| 05/30/2012 | CN202249743U Long spiral drilling machine |
| 05/30/2012 | CN202249742U Rotary mechanism of long spiral drilling machine |
| 05/30/2012 | CN202249741U Shield linkage protective device of all-hydraulic driver drill |
| 05/30/2012 | CN202249740U Disk spring damping power head |
| 05/30/2012 | CN202249739U Power head sliding mechanism of horizontal directional drilling machine |
| 05/30/2012 | CN202249738U Novel bearing device |
| 05/30/2012 | CN202249737U Rotary core drill |
| 05/30/2012 | CN202249736U Multi-head grasping claw for full-rotating drill completely made of sleeves |
| 05/30/2012 | CN202249735U Full-sleeve full-rotation drilling machine |
| 05/30/2012 | CN202247863U Rhinestone pile driver |
| 05/30/2012 | CN202232074U Simple manual screw digger |
| 05/24/2012 | US20120125693 Post hole digger with integrated safety features |
| 05/24/2012 | US20120125692 Force compensator for top drive assembly |
| 05/23/2012 | CN202228592U Counterweight structure and rotary drilling rig |
| 05/23/2012 | CN202227976U Device for dismounting second rotating shaft of rotary drilling machine |
| 05/23/2012 | CN202227975U Bearing sealing method for expansion frame of hydraulic drill machine |
| 05/23/2012 | CN202227974U Rotary pit drilling device |
| 05/23/2012 | CN102465668A 一种旋转摆动导向钻井工具 A rotary steerable drilling tool swing |
| 05/23/2012 | CN102465666A 一种旋挖钻机 One kind of rotary drilling rig |
| 05/23/2012 | CN102465665A 一种坚固耐用的挖孔机 Rugged, digging machine |
| 05/23/2012 | CN102465664A 一种自动清土机 An automatic clearing Graders |
| 05/23/2012 | CN102465663A 一种挖孔机 One kind of digging machine |
| 05/23/2012 | CN102031784B Slope protection pile pouring and cable bolting construction method for deep foundation pit |
| 05/23/2012 | CN101624896B Double power head drilling equipment |
| 05/23/2012 | CN101598002B Door frame type drilling machine |
| 05/22/2012 | US8181721 Torque track and slide assembly |
| 05/22/2012 | US8181717 Power tool with battery pack ejector |
| 05/22/2012 | CA2720881C Pneumatic drifter with replaceable foot pieces |
| 05/16/2012 | CN202220563U Pile frame and long auger driller using the pile frame |
| 05/16/2012 | CN202220551U Crawler type hydraulic drilling rig |
| 05/16/2012 | CN202220550U Long spiral drilling machine |
| 05/16/2012 | CN102454368A Telescopic drill rod and cast-in-situ cylindrical pile rotary drilling machine with same |
| 05/16/2012 | CN102454362A Gear box floating structure of drilling machine power head |
| 05/16/2012 | CN102454361A Independent-input-shaft-free power head |
| 05/10/2012 | WO2012018191A3 Auger with four-stage speeds |
| 05/09/2012 | EP2450524A1 Top drive system |
| 05/09/2012 | CN202215146U Driving device for three slurry pump of chain drive drilling machine |
| 05/09/2012 | CN102449257A Method and apparatus for drilling large-diameter hole in ground |
| 05/08/2012 | CA2679575C Top drive apparatus |
| 05/02/2012 | CN202209144U Sealing structure for power head of rotary drilling rig |
| 05/02/2012 | CN202209143U Large modified gear driving rotary power head of drilling rig |
| 05/02/2012 | CN102434100A Rotary drilling rig and automatically deviation-rectifying system thereof |
| 05/02/2012 | CN102434092A Down-the-hole oil pressure rotating device with oil distribution structure |
| 05/02/2012 | CN102434091A Rotary drilling rig, power head shock absorption system and shock absorption method thereof |
| 05/02/2012 | CN102434090A Rolling-compaction type rotary rock-breaking drilling bucket |
| 05/02/2012 | CN102145863B Engineering machinery and winching device thereof |
| 04/25/2012 | CN202202808U 履带式三臂多功能凿岩台车 Crawler three-arm multi-purpose drill rig |
| 04/25/2012 | CN202202805U 一种旋挖钻机及其加压力装置 One kind of rotary drilling rig and add pressure device |
| 04/25/2012 | CN202202321U 分体式车载轻型打桩机 Light-vehicle pile-split |
| 04/25/2012 | CN202202320U 一种三轮车车载螺旋打桩机 One kind of tricycle-vehicle pile-helix |
| 04/25/2012 | CN102425376A 一种旋挖钻机用的钻具及包括该钻具的旋挖钻机 One kind of rotary drilling rig with drilling and include the drilling of rotary drilling rig |
| 04/25/2012 | CN102425373A 超深孔定向钻机 Ultra-deep hole directional drilling |
| 04/25/2012 | CN101694148B 锚杆钻机的马达传动部件 Roofbolter motor drive components |
| 04/18/2012 | EP1853789B1 A method of geothermal loop installation |
| 04/18/2012 | CN202194720U Drilling rig with oil-to-gas system |
| 04/18/2012 | CN202194563U 一种同轴螺旋活动传动钻机回转动力头 A coaxial helical rotary power head drive drilling rig activity |
| 04/18/2012 | CN202194562U 一种行星传动钻机回转动力头 One kind of planetary drive drilling rig rotary power head |
| 04/18/2012 | CN202194561U 一种机械和复合钻机柴油机与电动机并车结构 A mechanical and composite rig diesel engine and electric motor and vehicle structure |
| 04/18/2012 | CN202194560U 锚杆钻机给进梁的摆动机构 Roofbolter feed beam oscillating mechanism |
| 04/18/2012 | CN202194559U Drilling system used for superficial layer drilling |
| 04/18/2012 | CN202194558U Rotating device used for shallow drilling |
| 04/18/2012 | CN202194557U 一种连接组件和连接抓斗的钻机 A connector assembly and connection grab rig |
| 04/18/2012 | CN202194556U 液压带压钻孔机床 Hydraulic Pressure Drilling Machine |
| 04/18/2012 | CN202194555U 上背式全回转旋挖钻机 Full-swing on the back of rotary drilling rig |
| 04/18/2012 | CN102418726A Hydraulic motor system for unit head of self-cooling rotary drilling rig and rotary drilling rig |
| 04/18/2012 | CN101608449B 大头锚杆及施工方法 Big Head Bolt and construction methods |
| 04/17/2012 | US8157021 Chisel adapter |
| 04/12/2012 | US20120085561 Motor-driven Handpiece |
| 04/11/2012 | CN202187709U 链条并车传动钻机的泥浆泵两挡驱动装置 Chain and two car drive rig mud pump gear drives |
| 04/11/2012 | CN202187708U 多功能地锚钻机 Multifunction anchor rig |
| 04/11/2012 | CN102409983A 一种转盘装置及旋挖钻机 One kind of turntable device and rotary drilling rig |
| 04/11/2012 | CN102409969A 一种后盖板式旋挖钻机动力头及其安装方法 One kind of cover plate and rotary drilling rig power head mounting method |
| 04/11/2012 | CN102409968A 横向液压钻孔机 Lateral hydraulic drilling machine |
| 04/10/2012 | US8154249 Battery pack |