| Patents for E21B 6 - Drives for drilling with combined rotary and percussive action (930) |
|---|
| 04/09/2008 | EP1415064B1 Drilling apparatus |
| 03/26/2008 | CN101148972A Electric percussion drilling device based on accumulator power supply |
| 03/25/2008 | US7347291 Bit assembly |
| 03/19/2008 | CN201037372Y Rock drill oil feeder |
| 03/19/2008 | CN101144369A Electric percussion drilling device based on pore bottom turbo-generator unit power supply |
| 03/05/2008 | CN201031615Y Hand-hold pneumatic power vibrating drill |
| 02/20/2008 | CN201024890Y Hydro-impact rotary drilling tool |
| 02/20/2008 | CN201024883Y Clutching lifter |
| 02/06/2008 | CN201016273Y High-frequency vibration percussion drilling implement |
| 01/17/2008 | US20080011516 Method for Casing Drilling, Drilling Unit and Adapter Device |
| 01/16/2008 | CN101105113A Hydraulic pressure percussion-rotary drilling tool |
| 01/09/2008 | CN201003371Y Rotating impact device |
| 12/27/2007 | WO2007147979A1 Hydraulic rotary percussive device of the drill type |
| 12/27/2007 | CA2654496A1 Hydraulic rotary percussive device of the drill type |
| 12/21/2007 | WO2007144953A1 Device and method for digging cave and pit |
| 12/12/2007 | CN200989161Y Whirling vibration unit head |
| 11/29/2007 | WO2007134478A1 Mud shaft for the drill string of a rotary percussive drilling rig, impact stack for a mud shaft and rotary percussive drilling rig |
| 11/22/2007 | US20070269281 Drill Bushing |
| 11/21/2007 | CN101076651A Method for casing drilling, drilling unit and adapter device |
| 11/20/2007 | CA2392633C Rotary-percussion electrical tool |
| 11/14/2007 | EP1488071B1 Method and device for directional down-hole drilling |
| 11/07/2007 | EP1585884B1 Bit assembly |
| 11/07/2007 | CN101067364A Submersible rotary vibrating unit head |
| 10/10/2007 | CN100342113C Bit assembly |
| 10/03/2007 | EP1840322A1 Rotary percussion drilling device and method |
| 09/26/2007 | CN200951763Y Electric, hydraulic dual control system of disc type brake for driller |
| 09/12/2007 | EP1831500A1 Method for casing drilling, drilling unit and adapter device |
| 09/05/2007 | CN101029557A Throughout No.2 driller |
| 08/29/2007 | CN100333879C Hydraulic rotary-percussive hammer drill |
| 08/22/2007 | EP1592862B1 Rock drill machine and flushing housing |
| 08/15/2007 | CN101016825A Automatically controlled impacting swing mechanism |
| 08/09/2007 | US20070181340 Drilling apparatus with percussive action cutter |
| 07/25/2007 | CN2926476Y Automatic low-noise hydraulic rock drilling machine |
| 07/25/2007 | CN2926475Y Hydraulic spherical impact rock driller |
| 07/18/2007 | CN2923972Y Fully-hydraulic multi-direction altitude anchoring driller |
| 07/04/2007 | EP1802843A1 Drill bushing |
| 06/26/2007 | US7234548 Hydraulic rotary-percussive hammer drill |
| 06/20/2007 | EP1796877A1 Rock drilling device |
| 06/20/2007 | CN1984755A Method for controlling percussion device, software product, and percussion device |
| 06/07/2007 | WO2007064232A1 Top drive drilling apparatus |
| 06/07/2007 | WO2007064231A1 Top drive drilling apparatus |
| 06/07/2007 | CA2631313A1 Top drive drilling apparatus |
| 06/07/2007 | CA2630793A1 Top drive drilling apparatus |
| 06/06/2007 | CN1975093A Rotary vibrating unit head |
| 05/23/2007 | CN2903330Y Uniform loading propulsive force bearing joint |
| 05/02/2007 | EP1778443A1 Method for controlling percussion device, software product, and percussion device |
| 05/02/2007 | CN1313698C Liquid driven downhole drilling machine |
| 04/19/2007 | WO2007042618A1 Method and rock drilling rig for hole drilling |
| 04/18/2007 | CN2890311Y Portable pneumatic rock drill |
| 04/18/2007 | CN2890310Y Double-gear rotary drilling device |
| 04/18/2007 | CN2890309Y Drilling device with ball-jamming type drill head |
| 04/18/2007 | CN1948698A Ultra light mountainous region drilling machine |
| 04/10/2007 | US7201235 Driver drill |
| 02/07/2007 | CN2866785Y Rotary valve type hydraulic percussion device |
| 02/07/2007 | CN2866784Y Vibrating roof-bolter |
| 01/31/2007 | CN2864065Y Rotating impact combined anchor bolt drill |
| 01/09/2007 | US7159674 Method and device for directional down-hole drilling |
| 12/27/2006 | CN2851499Y Ultralight drilling machine for use in mountains |
| 12/27/2006 | CN2851498Y Hand-held direct-drive type ultralight drilling machine |
| 11/08/2006 | CN2835519Y Explosion-proof coal-rock-impacting electric drill for mine |
| 11/02/2006 | EP1546503B1 Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string |
| 10/25/2006 | EP1492648B1 Hydraulic rotary-percussive hammer drill |
| 10/10/2006 | CA2394488C Welded joints for rotary-vibratory drills having reduced stress |
| 09/20/2006 | CN2818757Y Multifunctial hydraulic mountain drilling structure |
| 09/12/2006 | CA2392585C Support for supporting a power tool on a displacement carriage |
| 09/06/2006 | CN2813870Y Hydraulic impacting and boring double-function rock drilling machine |
| 08/23/2006 | CN2809182Y Vibratory impact type power head |
| 08/15/2006 | US7090038 Bedrock drilling and excavating apparatus |
| 07/25/2006 | US7080696 Motor mounting and sealing arrangement for a power tool |
| 07/19/2006 | CN2797607Y Wind power drilling machine |
| 07/11/2006 | US7073610 Downhole tool |
| 06/15/2006 | WO2006061459A1 Method for casing drilling, drilling unit and adapter device |
| 06/06/2006 | US7055633 Concrete drill |
| 05/31/2006 | CN1257786C Drilling and punching machine |
| 05/09/2006 | US7040421 Liquid driven downhole drilling machine |
| 04/27/2006 | WO2006043878A1 Drill bushing |
| 04/27/2006 | CA2579306A1 Drill bushing |
| 04/20/2006 | US20060081403 Bit assembly |
| 04/19/2006 | CN2773296Y High-efficient impacting drill with clockwise rotation |
| 04/13/2006 | WO2006003259A8 Method for controlling percussion device, software product, and percussion device |
| 04/13/2006 | CA2580082A1 Rock drilling device |
| 04/12/2006 | CN2771458Y Multi-purpose caving coal drilling machine |
| 04/11/2006 | US7025152 Using a rotating inner member to drive a tool in a hollow outer member |
| 03/29/2006 | EP1466068B1 Dual-member pipe driven power generator |
| 03/21/2006 | CA2208893C Drilling apparatus |
| 03/08/2006 | EP1226334B1 Method and device of controlling a rock drilling machine |
| 03/01/2006 | CN2761803Y Impact rotating single-tube follow up drill tool |
| 03/01/2006 | CN1243903C Rock drilling machine |
| 02/15/2006 | CN1734052A Method for forming concrete pile by means of reverse circulation hole-flushing and drilling system |
| 02/08/2006 | CN1732325A Bit assembly |
| 01/24/2006 | US6988563 Hammer drill |
| 01/12/2006 | WO2006003259A1 Method for controlling percussion device, software product, and percussion device |
| 01/04/2006 | CN2750032Y Big diameter impacting-rotating reverse circulation drilling device |
| 12/21/2005 | EP1606487A2 Pneumatic perforator with independent rotation of the drill |
| 12/21/2005 | EP0856637B1 Shock-absorbing mechanism for hydraulic hammering device |
| 12/08/2005 | DE19629211B4 Ankerbohrmaschine Anchor drill |
| 12/07/2005 | EP1303680B1 Rock drilling machine |
| 12/06/2005 | US6971455 Hammer drill with a mechanism for preventing inadvertent hammer blows |
| 11/23/2005 | CN2742112Y Drilling rig for loess plateau |
| 11/17/2005 | US20050252687 Method and device for directional down-hole drilling |