| Patents for E21B 6 - Drives for drilling with combined rotary and percussive action (930) |
|---|
| 11/09/2005 | EP1592862A1 Rock drill machine and flushing housing |
| 11/03/2005 | US20050241859 Bedrock drilling and excavating apparatus |
| 11/02/2005 | EP1458950B1 Liquid driven downhole drilling machine |
| 10/27/2005 | US20050236167 Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string |
| 10/19/2005 | EP1585884A1 Bit assembly |
| 09/28/2005 | CN2729289Y Vibration drilling tool |
| 09/21/2005 | CN2727376Y Percussion dual purpose jumbolter |
| 09/13/2005 | US6942046 Bore bit for very hard material |
| 08/17/2005 | CN2718198Y Drill bit short joint capable of generating water hammering pressure pulsation under well |
| 08/10/2005 | CN2716483Y Downhole vibrodrilling tool induced by hydraulic pulse |
| 07/27/2005 | EP1190155B1 Rock drill and mounting frame |
| 07/20/2005 | EP1554085A1 Rotating and percussive shank for a rock drill machine with an impact surface a distance from its back end |
| 07/13/2005 | CN1638924A Hydraulic rotary-percussive hammer drill |
| 07/13/2005 | CN1210485C Rock drill and mounting frame |
| 06/29/2005 | EP1546503A1 Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string |
| 06/22/2005 | CN2705580Y Rolling friction lifting system |
| 06/15/2005 | CN1626767A Rotative drill rig in punching and smashing type |
| 05/24/2005 | CA2217899C Dual-member pipe joint for a dual member drill string |
| 04/27/2005 | CN2695598Y Drilling machine |
| 04/26/2005 | US6883620 Device for hydraulic power supply of a rotary apparatus for percussive drilling |
| 03/30/2005 | CN1602384A Liquid driven downhole drilling machine |
| 03/23/2005 | CN2687303Y High-pressure high efficient hydraulic system |
| 03/17/2005 | US20050056460 Using a rotating inner member to drive a tool in a hollow outer member |
| 03/03/2005 | US20050045380 Drilling apparatus |
| 03/02/2005 | CN2682186Y Rolling friction hoisting device |
| 02/15/2005 | US6854538 Rock drill |
| 02/09/2005 | CN2677580Y Rotation punching pounding drilling machine |
| 01/27/2005 | US20050016774 Hydraulic rotary-percussive hammer drill |
| 01/20/2005 | US20050011680 Liquid driven downhole drilling machine |
| 01/19/2005 | CN2672273Y Position limit tamping heavy hammer and its lock pin |
| 01/18/2005 | US6843329 Rotary percussion device for a drill column |
| 01/05/2005 | EP1492648A1 Hydraulic rotary-percussive hammer drill |
| 12/22/2004 | EP1488071A1 Method and device for directional down-hole drilling |
| 12/08/2004 | CN2661904Y Multifunctional internal combustion rock drill |
| 11/24/2004 | CN2658369Y Pneumatic rock drilling machine |
| 11/11/2004 | WO2004072430A3 Pneumatic perforator with independent rotation of the drill |
| 11/10/2004 | CN2654836Y Rotating and impacting combined type drill |
| 10/13/2004 | EP1466068A2 Dual-member pipe driven power generator |
| 09/22/2004 | EP1458950A1 Liquid driven downhole drilling machine |
| 08/26/2004 | WO2004072430A2 Pneumatic perforator with independent rotation of the drill |
| 08/05/2004 | WO2004065755A1 Rock drill machine and flushing housing |
| 07/22/2004 | US20040140131 Downhole tool |
| 07/08/2004 | WO2004057148A1 Bit assembly |
| 07/07/2004 | CN2623864Y Medium depth bore gas-liquid linkage drilling unit for underground mining |
| 06/17/2004 | US20040112649 Rock drill |
| 06/15/2004 | US6749031 Drilling system |
| 06/10/2004 | US20040108123 Hammer drill with a mechanism for preventing inadvertent hammer blows |
| 06/09/2004 | CN1502436A Percussion drill |
| 05/27/2004 | US20040099425 Rotary percussion device for a drill column |
| 05/26/2004 | EP1422028A1 Hammer drill with a mechanism for preventing inadvertent hammer blows |
| 05/25/2004 | US6739413 Using a rotating inner member to drive a tool in a hollow outer member |
| 05/11/2004 | US6732814 Rock drilling machine |
| 05/11/2004 | US6732813 Method and device of controlling a rock drilling machine |
| 05/06/2004 | WO2004037493A1 Rotating and percussive shank for a rock drill machine with an impact surface a distance from its back end |
| 05/06/2004 | EP1415064A1 Drilling apparatus |
| 04/22/2004 | US20040074653 Hammer drill |
| 04/21/2004 | EP0817901B1 Dual-member pipe joint for a dual member drill string |
| 04/08/2004 | WO2004029400A1 Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string |
| 03/31/2004 | CN1485525A 锤钻 Hammer Drill |
| 03/16/2004 | US6705407 Rock drilling and mounting frame |
| 03/03/2004 | EP1393863A1 Hammer Drill |
| 02/11/2004 | CN2603187Y Aluminium alloy light boring machine used in hilly area |
| 02/10/2004 | USRE38418 Dual member pipe joint for a dual member drill string |
| 12/23/2003 | CA2203736C Guided drilling system with shock absorber |
| 12/18/2003 | US20030230434 Bore bit for very hard material |
| 12/02/2003 | CA2093404C Rock drilling device |
| 11/13/2003 | WO2003060284A3 Dual-member pipe driven power generator |
| 09/25/2003 | WO2003078107A1 Hydraulic rotary-percussive hammer drill |
| 09/18/2003 | WO2003076759A1 Method and device for directional down-hole drilling |
| 09/12/2003 | WO2003074834A1 Drill equipped with vibrating hammer with eccentric masses for tool support |
| 08/13/2003 | CN1117913C Rotary impacting device for directional drilling in rock |
| 08/07/2003 | WO2003064805A1 Liquid driven downhole drilling machine |
| 08/05/2003 | CA2104705C Drilling device for a rock drill |
| 07/24/2003 | WO2003060284A2 Dual-member pipe driven power generator |
| 07/17/2003 | US20030132034 Using a rotating inner member to drive a tool in a hollow outer member |
| 07/02/2003 | CN1427916A Rock drilling machine |
| 06/18/2003 | CN1425101A Device for hydraulic power supply of rotary apparatus for percussive drilling |
| 05/06/2003 | US6557652 Method for performing ground or rock work and hydraulic percussion device |
| 05/02/2003 | EP1012440B1 Boring device |
| 04/24/2003 | US20030075346 Rock drilling machine |
| 04/23/2003 | EP1303680A1 Rock drilling machine |
| 04/16/2003 | EP1302621A1 Drill bit for very hard materials |
| 04/02/2003 | EP0927294B1 Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussion device and a lower percussion device |
| 03/12/2003 | EP1291487A1 Method for soil and stoneworking and hydraulic impact tool |
| 01/16/2003 | WO2002095180A3 Impact downhole tool |
| 12/19/2002 | WO2002101192A1 Rock drill |
| 12/12/2002 | WO2002099242A1 Drilling apparatus |
| 12/05/2002 | WO2002097232A1 Method and arrangement for rock drilling and tool and rock drill used in rock drilling |
| 11/28/2002 | WO2002095180A2 Impact downhole tool |
| 11/27/2002 | CN2522599Y Hilly-area drilling rig |
| 11/21/2002 | WO2001094079A1 Rotary percussion device for a drill column |
| 11/21/2002 | CA2410400A1 Rotary percussion device for a drill column |
| 10/22/2002 | CA2067616C Device in hammer machines |
| 10/08/2002 | US6460627 Drilling and/or chiseling device |
| 10/03/2002 | US20020139585 Reverse circulation drilling system with bit locked underreamer arms |
| 09/18/2002 | EP1240403A1 Device for hydraulic power supply of a rotary apparatus for percussive drilling |
| 07/31/2002 | EP1226334A1 Method and device of controlling a rock drilling machine |
| 07/04/2002 | US20020084110 Rock drilling and mounting frame |
| 07/04/2002 | CA2328636A1 Air drilling system |
| 07/03/2002 | CN1357075A Rock drill and mounting frame |