| Patents for E21B 3 - Rotary drilling (4,061) |
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| 09/28/2011 | CN201992021U 液力变矩器正车减速箱 Positive torque converter gearbox car |
| 09/28/2011 | CN201991445U 一种筒桩旋挖钻斗 One kind of tubular pile auger drill bucket |
| 09/28/2011 | CN201991443U 全液压控制桩机 Full hydraulic control pile |
| 09/28/2011 | CN201991442U 油电两用旋挖钻机 Oil and electricity dual rotary drilling rig |
| 09/28/2011 | CN201991438U 单变幅油缸式旋挖钻机 Single luffing cylinder type rotary drilling rig |
| 09/28/2011 | CN201991437U 万向摆动背轮式旋挖钻机 Universal swing back wheel rotary drilling rig |
| 09/28/2011 | CN201991436U 多功能挤压螺纹桩机 Multifunctional extrusion screw pile |
| 09/28/2011 | CN201991435U 一种形成环形孔的现浇筒桩旋挖钻机 A method of forming an annular hole situ tubular piles Rotary Drilling Rig |
| 09/28/2011 | CN201991434U 碾压式旋挖破岩钻斗 Compacted rock breaking drill bucket auger |
| 09/28/2011 | CN101748975B Fixing seat for rotary drilling rig and rotary drilling rig |
| 09/21/2011 | CN201982015U 摆动式挖坑机 Swing digging machine |
| 09/21/2011 | CN201982010U 地面加压装置 Ground pressure device |
| 09/21/2011 | CN201980916U 卷扬机构及应用该卷扬机构的旋挖钻机 Rotary drilling rig winch mechanism and application of the winch mechanism |
| 09/15/2011 | US20110224859 Method for using mining vehicle, arrangement in mine, rock drilling rig, and mining vehicle |
| 09/15/2011 | US20110220420 Feed Chain Automatic Tensioner |
| 09/15/2011 | US20110220419 Accumulator membrane unit, method for production thereof and rock drilling machine including such an accumulator membrane unit |
| 09/14/2011 | CN201972595U 旋挖钻机能量回收液压装置 Rotary drilling rig hydraulic energy recovery devices |
| 09/14/2011 | CN201972594U 多功能液压打桩机 Multifunction hydraulic hammers |
| 09/14/2011 | CN102182402A Gas discharge drilling machine capable of positioning quickly |
| 09/14/2011 | CN102182401A Folding type fully hydraulic crawler pile driver |
| 09/14/2011 | CN102182396A Core drilling machine power head capable of keeping off opening orifice |
| 09/14/2011 | CN102182177A Integrated machine capable of drilling holes, rotating and expanding disk and cleaning holes |
| 09/14/2011 | CN101424163B Single-rail connecting device and single-rail |
| 09/13/2011 | CA2557868C Rotating systems associated with drill pipe for conveying electrical power to downhole systems |
| 09/13/2011 | CA2514136C Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
| 09/09/2011 | WO2009135220A3 Fill up and circulation tool and mudsaver valve |
| 09/08/2011 | DE102010010036A1 Sealing arrangement for sealing annular space formed between interior connecting rod and exterior connecting rod of drilling drive unit of drilling device, has elastic sealing element for sealing gap of annular space |
| 09/07/2011 | CN201963198U 一种切削钻机 A cutting rig |
| 09/07/2011 | CN201963196U 路面钻孔机 Pavement Drills |
| 09/07/2011 | CN201963194U 一种高效自锁型地钻齿轮箱 An efficient self-locking drill gearbox |
| 09/07/2011 | CN201963193U 旋挖钻机的液压泵保护系统 Rotary drilling rig pump protection system |
| 09/07/2011 | CN201963192U 太阳能渐进式独立基础地钻 Solar progressive independent foundation drill |
| 09/07/2011 | CN201963191U 一种防掉螺杆钻具 An anti-off screw drill |
| 09/06/2011 | US8011444 Spindle locking assembly |
| 08/31/2011 | CN201955058U 测深装置及具有该测深装置的工程机械 Sounding device and have construction machinery sounding device that |
| 08/31/2011 | CN201953386U 锚杆机的操控系统及带该操控系统的锚杆机 Bolting machine control system and bolting machine with the control system |
| 08/31/2011 | CN201953315U 一种筒桩旋挖钻斗 One kind of tubular pile auger drill bucket |
| 08/31/2011 | CN201953309U 一种用于旋挖钻机动力头上的焊接式套筒 A rotary drilling rig power head welded sleeve |
| 08/31/2011 | CN201953308U 高速液压钻机 High-speed hydraulic drilling rig |
| 08/31/2011 | CN201953307U 旋挖钻机配重组合装置 Rotary drilling rig counterweight combination device |
| 08/31/2011 | CN102168558A Self-walking lifting full-hydraulic auger coal mining machine |
| 08/31/2011 | CN102168555A Ultralow surface full-hydraulic drill type coal mining machine |
| 08/31/2011 | CN102168440A Four-drill groove making machine |
| 08/24/2011 | CN201944035U 可控低速大扭矩动力头马达 Controlled low speed high torque motor power head |
| 08/24/2011 | CN201943612U 水井钻机提升下压装置 Water well drilling rig lifting device under pressure |
| 08/24/2011 | CN201943578U 全液压自行式锚杆钻机 Self-propelled hydraulic bolt rig |
| 08/24/2011 | CN201943571U 一种适用于低温环境的修钻井机转盘 One for low-temperature environment turntable repair drilling machine |
| 08/24/2011 | CN201943570U 旋挖钻机上车回转限速系统 Rotary drilling rig rotary speed limit system on the car |
| 08/24/2011 | CN201943569U 具有多级限扭功能的旋挖钻机动力头系统 Rotary drilling rig power head system has a multi-level limit twist function |
| 08/24/2011 | CN201943066U 一种螺杆桩机 A screw pile |
| 08/24/2011 | CN102165134A Modular rotary drill head |
| 08/24/2011 | CN102162334A Self-powered drill machine |
| 08/24/2011 | CN102162333A Fully-electric crawler suspension remote control pile driver |
| 08/24/2011 | CN102162263A Swing locating pin for grooving saw |
| 08/24/2011 | CN102162248A Method for forming variable-cross-section compaction thread pile and compaction drilling tool |
| 08/23/2011 | US8002048 Drilling implement and method for operating a drilling implement |
| 08/23/2011 | CA2540718C Method and apparatus for controlling the ascent and descent of pipe in a well bore |
| 08/17/2011 | CN201934087U 旋挖钻机的驱动控制装置及旋挖钻机 Rotary drilling rig drive control device and rotary drilling rig |
| 08/17/2011 | CN201934014U 一种逆水浆循环人工钻机 One kind of pulp against the current cycle of artificial rigs |
| 08/17/2011 | CN201934013U Slurry prevention power head |
| 08/17/2011 | CN201934012U 旋挖钻机扫孔钻具 Sweep auger drill hole drill |
| 08/17/2011 | CN201934011U 冰凌爆破开冰仪 Ice blasting open the ice instrument |
| 08/17/2011 | CN201933490U 一种组合式长螺旋旋挖钻机 A modular long spiral rotary drilling rig |
| 08/17/2011 | CN102155169A Extension bar and long spiral drilling machine using same |
| 08/17/2011 | CN102155168A Large triangular structure derricking mechanism for rotary drilling rig with auxiliary jacking mechanism |
| 08/17/2011 | CN102155157A Spiral drilling machine for forming concrete piles of different depths and shapes |
| 08/17/2011 | CN102155156A High-speed hydraulic drilling machine |
| 08/10/2011 | EP1751390B1 Apparatus and method for modified horizontal directional drilling assembly |
| 08/10/2011 | CN201924826U 液压式植树钻坑机 Hydraulic drill hole machine planting |
| 08/10/2011 | CN102145863A Engineering machinery and winching device thereof |
| 08/09/2011 | US7992876 Sealing gasket for furnace body button |
| 08/04/2011 | WO2011093716A1 Device and method for drilling with continous tool rotation and continous drilling fluid supply |
| 08/04/2011 | WO2011093715A1 Rotary table device for a pipe string |
| 08/04/2011 | US20110186323 Device for preventing vibrations in a tool spindle |
| 08/04/2011 | CA2788151A1 Device and method for drilling with continous tool rotation and continous drilling fluid supply |
| 08/04/2011 | CA2786078A1 Rotary table device for a pipe string |
| 08/03/2011 | CN201915850U 一种钻杆装置及包括该装置的工程机械 A drill apparatus and comprising a mechanical construction of the apparatus |
| 08/03/2011 | CN201915847U 旋挖钻机用三角形连接臂 Rotary drilling rig with a triangle connecting arm |
| 08/03/2011 | CN201915846U 一种钻头加速器 A drill Accelerator |
| 08/03/2011 | CN201915834U 多功能钻机 Multifunctional Drilling Rig |
| 08/03/2011 | CN201915829U 一种转盘密封润滑管路 One kind of turntable seal lubrication pipeline |
| 08/03/2011 | CN201915828U 切削钻机变速箱 Cutting rig gearbox |
| 08/03/2011 | CN201915827U 一种钻井平台的动力水龙头 A drilling rig power swivel |
| 08/03/2011 | CN201915826U 一种钻进系统及钻进设备 One kind of drilling systems and drilling equipment |
| 08/03/2011 | CN201915825U 摆轴座 Pendulum shaft seat |
| 08/03/2011 | CN201915824U 一种兼具地下连续墙施工功能的汽车旋挖钻机 Underground continuous wall construction that is both functional car rotary drilling rig |
| 08/03/2011 | CN102144072A Feed mechanism for drilling systems |
| 07/28/2011 | US20110180326 Apparatus and method for cutting a wellbore |
| 07/27/2011 | CN201908567U Rotating plate for deep well drilling rig |
| 07/27/2011 | CN201908566U Electric auger boring type bailing tool for oil gas borehole |
| 07/27/2011 | CN102134968A Drilling system and drilling equipment |
| 07/27/2011 | CN102134966A Cutting drilling machine |
| 07/27/2011 | CN102134964A Double-wall spindle power head for core drill |
| 07/21/2011 | US20110174545 Drilling machine and method |
| 07/20/2011 | CN201902161U Rotary drilling rig power head and rotary drilling rig |
| 07/20/2011 | CN201902160U Drilling machine capable of quarrying stone in cave/channel and drilling device |
| 07/14/2011 | WO2011035280A3 Systems and methods for improving drilling efficiency |
| 07/13/2011 | EP2342420A1 Power tong device |
| 07/13/2011 | CN201896611U Outburst prevention drilling rig |
| 07/13/2011 | CN201896610U Outburst prevention drilling rig for coal mine |