| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
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| 12/21/2011 | CN102287132A 全套管全回转钻机 A full tube full rotary drilling rig |
| 12/15/2011 | US20110303464 Fluid Actuated Impact Tool with Solid Piston-Standard Bit Arrangement and Water Seal |
| 12/15/2011 | US20110303461 Clutch for a Jack Element |
| 12/14/2011 | EP2393991A1 Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting |
| 12/14/2011 | CN102282333A 阀控井底马达 VRLA downhole motor |
| 12/14/2011 | CN102278062A 金刚石复合齿 Diamond composite teeth |
| 12/14/2011 | CN102278061A 用于水平定向钻机动力传动装置上的液压系统 Hydraulic systems on the horizontal directional drilling power transmission apparatus |
| 12/08/2011 | US20110297447 Pressure Reversing Valve Assembly For a Down-the-Hole Percussive Drilling Apparatus |
| 12/08/2011 | US20110297397 Deployment of downhole pump using a cable |
| 12/07/2011 | CN202065352U 用于涡轮钻具的径向滑动轴承 Radial sliding bearings for turbodrill |
| 12/07/2011 | CN202064826U 一种钛合金挠性万向轴 Titanium alloy flexible cardan shaft |
| 12/07/2011 | CN102268962A 一种具有压力补偿功能的油密封螺杆钻具传动轴总成 Oil seal having a pressure compensation screw drill shaft assembly |
| 12/07/2011 | CN102268961A 一种具有减振功能的螺杆钻具传动轴总成 Screw having a damping function drill shaft assembly |
| 12/06/2011 | US8069933 Bearing assemblies, and bearing apparatuses and motor assemblies using same |
| 12/06/2011 | US8069917 Gripper assembly for downhole tools |
| 12/06/2011 | US8069716 Multi-coupling reduced length measure while drilling apparatus |
| 12/01/2011 | WO2011149363A1 Enhanced vibrational or hammering apparatus |
| 12/01/2011 | WO2011084040A3 The method of sealing of moving elements and the device for its realization |
| 12/01/2011 | CA2800033A1 Enhanced vibrational or hammering apparatus |
| 11/30/2011 | CN202055752U 一种螺杆钻具耐磨传动轴总成 A screw drill wear and drive shaft assembly |
| 11/30/2011 | CN202055751U 钻机的主传动和变速系统及其操纵机构 Main drive and transmission system and its operating mechanism rig |
| 11/29/2011 | US8066069 Method and apparatus for wellbore construction and completion |
| 11/29/2011 | CA2650975C Apparatus and method for selectively orienting a bit |
| 11/24/2011 | WO2011123765A3 Down-the-hole drill hammer having an extendable drill bit assembly |
| 11/23/2011 | EP2097608B1 Hydraulically driven tractor |
| 11/22/2011 | US8062140 Power transmission line section |
| 11/22/2011 | US8061448 Hydraulic braking device for turbine, turbine equipped with such a device and drilling equipment comprising such a turbine |
| 11/22/2011 | US8061447 Variable linkage assisted gripper |
| 11/16/2011 | EP1769131B1 Drill head for a ground-boring device |
| 11/16/2011 | CN202039904U Turbine stator rotor assembled part and turbine drilling tool |
| 11/16/2011 | CN202039781U Multifunctional drilling device |
| 11/09/2011 | EP1885994B1 A device for selective movement of well tools and also a method of using same |
| 11/09/2011 | CN202031477U Hydraulic power foundation drilling machine |
| 11/09/2011 | CN202031475U Combined drilling device |
| 11/09/2011 | CN202031474U Hybrid rotary drilling rig |
| 11/08/2011 | US8051926 Control device |
| 11/07/2011 | CA2703339A1 Drilling plugs and the like in wells |
| 11/03/2011 | WO2011136663A1 A vibrational or a downhole apparatus with a magnetically coupled drive |
| 11/03/2011 | US20110266067 Down hole hammer having elevated exhaust |
| 11/03/2011 | US20110266063 Steerable drilling system |
| 11/02/2011 | CN202023499U Piling machine for holing through rotary pump |
| 11/01/2011 | USRE42877 Methods and apparatus for wellbore construction and completion |
| 10/28/2011 | CA2701531A1 Reverse torque drive system |
| 10/27/2011 | US20110259575 Injection of liquid into boreholes, with suckback pulsing |
| 10/20/2011 | WO2011130123A2 Anchor system and method for anchoring a tool with a positional bias |
| 10/20/2011 | WO2011129958A2 Reverse circulation hammer with modular bit |
| 10/20/2011 | WO2011128045A2 Ground-drilling device |
| 10/20/2011 | US20110253456 Reverse circulation hammer with modular bit |
| 10/20/2011 | US20110253451 Borehole Impact Rock Breaker |
| 10/20/2011 | DE102010015465A1 Erdbohrvorrichtung Boring apparatus |
| 10/19/2011 | CN102220841A Submarine sampling drilling rig |
| 10/19/2011 | CN102220837A Air distribution anti-swiveling device for combination type down-the-hole hammer reverse circulating method |
| 10/19/2011 | CN101120155B Integrated magnetic ranging tool |
| 10/16/2011 | CA2737531A1 Bearing assemblies, bearing apparatuses using the same, and related methods |
| 10/13/2011 | WO2011126881A2 Undercut stator for a positive displacement motor |
| 10/13/2011 | CA2794501A1 Undercut stator for a positive displacement motor |
| 10/12/2011 | CN102216552A Drilling apparatus |
| 10/06/2011 | WO2011123765A2 Down-the-hole drill hammer having an extendable drill bit assembly |
| 10/06/2011 | WO2011084233A3 Apparatus and method for reaming a wellbore during the installation of a tubular string |
| 10/06/2011 | WO2011068842A3 Grip enhanced tractoring |
| 10/06/2011 | US20110240373 Down-the-hole drill hammer having an extendable drill bit assembly |
| 10/06/2011 | US20110240370 Drilling motor with a locking collet sleeve stabilizer |
| 10/05/2011 | EP2372074A2 Apparatus and methods for running liners in extended reach wells |
| 10/05/2011 | CN202000342U High air pressure pneumatic impact rock penetrating and inserting device for continuous flight auger |
| 10/05/2011 | CN102209832A Locking clutch for downhole motor |
| 10/05/2011 | CN102207219A Cylinder control valve for down-the-hole drill |
| 10/04/2011 | US8028766 Electrically powered tractor |
| 10/04/2011 | US8028761 Electric power tool |
| 09/29/2011 | WO2011119408A2 Foot valve assembly for a down hole drill |
| 09/29/2011 | WO2011119155A1 Coiled tubing percussion drilling |
| 09/29/2011 | US20110232970 Coiled tubing percussion drilling |
| 09/28/2011 | CN102202823A Spindle drive systems and methods |
| 09/28/2011 | CN102199989A Automatic drilling machine without drill rod |
| 09/28/2011 | CN101666207B Energy accumulation type hydraulic hole drilling hammer |
| 09/27/2011 | US8025110 Motor shaft security apparatus |
| 09/27/2011 | CA2551981C Improved traction control for downhole tractor |
| 09/21/2011 | CN201982013U 反循环钻机钻孔、锤击成孔、扩孔、清渣的施工设备 Reverse circulation drilling rig drilling, hammering into the hole, reaming, slag construction equipment |
| 09/21/2011 | CN201982009U 空心滑阀式液压冲击器 Hollow spool valve impactor |
| 09/21/2011 | CN102191915A Resonant pulse vibrating drilling device |
| 09/21/2011 | CN102191913A High-energy reverse circulation large-diameter hole-drilling hammer |
| 09/15/2011 | WO2011062925A4 Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
| 09/15/2011 | US20110220421 Rock drilling machine and axial bearing module |
| 09/14/2011 | CN201973310U 潜孔钻气缸控制阀 DTH drill cylinder control valve |
| 09/14/2011 | CN102182751A Radial sliding bearing for turbine drill |
| 09/13/2011 | CA2557868C Rotating systems associated with drill pipe for conveying electrical power to downhole systems |
| 09/08/2011 | US20110214919 Dual top drive systems and methods |
| 09/07/2011 | CN201963205U 电动潜孔冲击钻头 Electric DTH hammer drill |
| 09/07/2011 | CN201963200U 一种可变角度的轻便型钻机 A variable angle portable drilling rig |
| 09/07/2011 | CN201963191U 一种防掉螺杆钻具 An anti-off screw drill |
| 09/06/2011 | US8011455 Down hole hammer having elevated exhaust |
| 09/06/2011 | US8011425 Transmitting sensor response data and power through a mud motor |
| 09/02/2011 | CA2733367A1 Downhole positive displacement motor |
| 09/01/2011 | US20110209919 Pressurized fluid flow system for a normal circulation hammer and hammer thereof |
| 08/31/2011 | CN102168523A Main driving and speed-changing system of drilling machine as well as operating mechanism of the drilling machine |
| 08/30/2011 | US8006784 Backhead and drill assembly with backhead |
| 08/30/2011 | US8006776 Sliding pressure control valve for pneumatic hammer drill |
| 08/30/2011 | CA2496098C Down hole motor with locking clutch |
| 08/25/2011 | US20110203820 Track guiding system |
| 08/25/2011 | US20110203789 Pressure equalising devices |
| 08/24/2011 | EP2360497A2 Drill String Telemetry System and Method |