| Patents for E21B 6 - Drives for drilling with combined rotary and percussive action (930) |
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| 12/28/2011 | CN202090830U 带万向铰接副的多功能简易动臂双折液压钻机 Vice versatility with simple universal hinged bi-fold boom hydraulic drill |
| 12/28/2011 | CN202090825U 液压钻液压锤一体机 Hydraulic hydraulic hammer drill machine |
| 12/21/2011 | CN202081821U 全液压一体化多用途切削钻机 Integrated multi-purpose cutting hydraulic rig |
| 12/15/2011 | WO2011119408A3 Foot valve assembly for a down hole drill |
| 12/14/2011 | CN102281995A 钻岩机及轴向轴承模块 Rock drilling machine and axial bearing module |
| 12/13/2011 | CA2601611C Percussion adapter for positive displacement motors |
| 12/07/2011 | CN101624897B 全自动液压逆打凿岩机 Automatic hydraulic rock drill fight against |
| 12/04/2011 | CA2742024A1 Pressure reversing valve assembly for a down-the-hole percussive drilling apparatus |
| 12/01/2011 | WO2011149406A1 Rock drilling machine, removable cartridge, stop ring and drilling rig |
| 12/01/2011 | WO2011149363A1 Enhanced vibrational or hammering apparatus |
| 12/01/2011 | CA2800033A1 Enhanced vibrational or hammering apparatus |
| 12/01/2011 | CA2799724A1 Rock drilling machine, removable cartridge, stop ring and drilling rig |
| 11/23/2011 | CN202047742U Rotary percussion type rock drilling machine and double-layer drill rod mechanism |
| 11/10/2011 | WO2011139208A1 Drilling machine |
| 10/19/2011 | CN102223986A Rock drilling machine and axial bearing module |
| 10/12/2011 | CN102213074A Rotary impact type rock drilling machine and double-layer drilling rod mechanism |
| 10/06/2011 | US20110240369 Downhole Steerable Hammer Element |
| 10/05/2011 | CN202000342U High air pressure pneumatic impact rock penetrating and inserting device for continuous flight auger |
| 09/21/2011 | CN102191914A Full-hydraulic integrated multipurpose cutting driller |
| 09/20/2011 | CA2511725C Bit assembly |
| 09/09/2011 | WO2011087542A3 Percussive augmenter of rotary drills for operating as a rotary-hammer drill |
| 08/31/2011 | EP2361731A2 Rotary percussion drilling device and method |
| 08/24/2011 | CN201943567U 一种马达冲击传动轴 A motor shaft impact |
| 08/17/2011 | CN102155159A Hammer rotating mechanism |
| 08/17/2011 | CN101076651B Method for casing drilling and drilling unit |
| 08/04/2011 | WO2011092377A1 Method and arrangement for lubricating drill shank of rock drilling machine |
| 08/04/2011 | CA2786678A1 Method and arrangement for lubricating drill shank of rock drilling machine |
| 08/03/2011 | EP2349655A1 Rock drilling machine and axial bearing module |
| 08/03/2011 | EP2349654A1 Rock drilling machine and axial bearing module |
| 08/03/2011 | CN201915831U 一种冲击式液压凿岩机 An impact hydraulic rock drill |
| 07/27/2011 | CN201908568U Pneumatic rock drilling machine of cycloidal gear transmission |
| 07/20/2011 | CN101575942B Pneumatic anchor rod hammer drill |
| 07/14/2011 | WO2011035280A3 Systems and methods for improving drilling efficiency |
| 07/13/2011 | CN102121350A Impulse type hydraulic rock drill |
| 06/29/2011 | CN102108835A Motor impact transmission shaft |
| 06/29/2011 | CN101538987B Anchoring drilling machine based on working mode of double-pump complementation automatic merging |
| 06/22/2011 | CN201874459U Horizontal drilling machine capable of removing obstacles by means of impact |
| 06/21/2011 | CA2608829C Electronically controlled earth drilling rig |
| 06/15/2011 | CN201865568U Full-hydraulic multifunctional power head |
| 06/03/2011 | CA2714704A1 Wellbore percussion adapter and tubular connection |
| 06/01/2011 | CN201851101U Experimental measurement platform system applicable to high-power transmission and communication system |
| 05/25/2011 | CN102076931A Bottom-hole assembly, and method and system for transmitting data from bottom-hole assembly |
| 05/18/2011 | CN201835748U Jumbolter with rear-mounted impact mechanism |
| 05/10/2011 | CA2497905C Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string |
| 05/10/2011 | CA2479055C Hydraulic rotary-percussive hammer drill |
| 05/04/2011 | CN201818237U Non-valve impact rotating type power head of hydraulic anchor rod drilling machine |
| 04/27/2011 | CN201810201U Percussive multifunctional circulation rock drilling rig |
| 04/20/2011 | CN201802309U Hydraulic rotary pneumatic impact type drilling machine |
| 04/13/2011 | EP2307668A1 A bottom-hole assembly, and a method and system for transmitting data from a bottom-hole assembly |
| 04/06/2011 | CN201786253U Spiral percussion drill |
| 04/06/2011 | CN102003143A Multidirectional hydraulic rock drilling machine with integrated drives |
| 03/30/2011 | CN201778652U Low-amplitude and high-frequency torsional pulse generator |
| 03/24/2011 | WO2011035280A2 Systems and methods for improving drilling efficiency |
| 03/24/2011 | CA2774551A1 Systems and methods for improving drilling efficiency |
| 03/16/2011 | CN201763239U Pillar drilling machine |
| 03/09/2011 | CN101067364B Submersible rotary vibrating unit head |
| 02/16/2011 | CN201747280U Impact cylinder drilling tool and rotary drilling rig |
| 01/18/2011 | CA2465225C Liquid driven downhole drilling machine |
| 01/06/2011 | WO2011000102A1 Vibrating downhole tool |
| 01/06/2011 | CA2780885A1 Vibrating downhole tool |
| 01/05/2011 | CN101148972B Electric percussion drilling device based on accumulator power supply |
| 12/22/2010 | CN101922284A Impact drilling tool |
| 12/16/2010 | DE202010014478U1 Antriebsvorrichtung Driving device |
| 12/15/2010 | EP2260172A1 Wellbore drilling accelerator and tubular connection |
| 12/08/2010 | CN101144369B Electric percussion drilling device based on pore bottom turbo-generator unit power supply |
| 11/24/2010 | CN201650109U Impacted type drilling tool |
| 11/10/2010 | EP2247816A1 A method and system for installing geothermal heat exchangers, energy piles, concrete piles, micropiles, and anchors using a sonic drill and a removable or retrievable drill bit |
| 10/27/2010 | EP2242894A2 Vibration hammer |
| 10/27/2010 | CN101871316A Piling machine |
| 10/13/2010 | CN201605996U 摩擦片式液压凿岩机回转机构 Friction plate type hydraulic rock drill rotating mechanism |
| 10/07/2010 | US20100252330 Down-hole Hammer Drill |
| 10/07/2010 | US20100252289 Drilling apparatus |
| 09/29/2010 | CN201593376U Hammer impact drill |
| 09/23/2010 | US20100236829 Stabilizer for drill strings |
| 09/08/2010 | CN101289923B Detachable hammer and drill |
| 09/01/2010 | CN101821471A Magnetic hammer |
| 08/25/2010 | CN201560706U Hydraulic control circuit for rock drill and control system thereof |
| 08/25/2010 | CN101812966A engineering driller |
| 08/19/2010 | WO2010093080A1 Ground excavator and underground polygonal shoring method |
| 08/18/2010 | CN201554366U Safety environment-friendly type down-the-hole hammer rock driller |
| 08/12/2010 | US20100200301 Down hole hammer having elevated exhaust |
| 08/11/2010 | EP2216495A1 Drilling apparatus |
| 08/11/2010 | CN201546618U Pneumatic anchor bolt rock drill |
| 08/11/2010 | CN1975093B Rotary vibrating unit head |
| 07/21/2010 | CN101781969A Self-rotating air hammer |
| 07/20/2010 | CA2458796C Drilling apparatus |
| 07/06/2010 | CA2589788C Method for casing drilling, drilling unit and adapter device |
| 07/06/2010 | CA2449506C Downhole tool |
| 06/30/2010 | CN101765694A Method and device for controlling a rock drill rig |
| 06/23/2010 | CN101748973A Drill head for hammer drill |
| 06/23/2010 | CN101748969A Hydraulic control loop used for jackdrill and control system thereof |
| 06/10/2010 | US20100139985 Vibratory drill head mounting and rotation coupling system |
| 06/10/2010 | US20100139984 Rotary drive for applying rotary torque to a shaft to be axially vibrated |
| 06/09/2010 | CN201502323U Reversible gyrator with vibration of jumbolter |
| 06/09/2010 | CN201502322U Motor drive component with vibrant jumbolter |
| 06/09/2010 | CN201502321U Double-ratchet wheel component of motor drive component for jumbolter |
| 06/09/2010 | CN201502320U Drive housing body with vibrant jumbolter |
| 06/09/2010 | CN201502319U Three-ratchet wheel component of gyrator for jumbolter |
| 06/02/2010 | EP2191095A1 Magnetic hammer |
| 06/02/2010 | EP2191094A1 Down-hole hammer drill |