| Patents for E21B 1 - Percussion drilling (2,080) |
|---|
| 08/30/2007 | CA2640533A1 Percussion device and rock drilling machine including such a percussion device |
| 08/29/2007 | CN101027165A Method for breaking rock |
| 08/29/2007 | CN100334320C Submersible pump for water-saving drilling |
| 08/22/2007 | CN2937437Y 空气冲击锤 Air hammer |
| 08/21/2007 | CA2312341C Percussive tool |
| 08/14/2007 | US7255516 Method and apparatus for replacement of underground pipe |
| 08/14/2007 | US7255181 Method and device for the drilling of holes in ground or rocky material |
| 08/08/2007 | CN2931750Y Crusher anti-vibration pad with doublet structure |
| 08/01/2007 | CN101010481A A drilling apparatus having in-line extending wings and driving method thereof |
| 07/25/2007 | EP1809853A2 Underground piercing tool |
| 07/25/2007 | EP1809852A1 Hydraulic impact mechanism |
| 07/25/2007 | CN2926472Y Boring air impacting hammer |
| 07/17/2007 | US7244492 particulate substrate materials having soluble fibrous material partially or fully embedded in a resin or polymer coating surrounding the particulate substrate; can include phenol-aldehyde novolac polymers and phenol-aldehyde resole polymers, as well as water-soluble polymeric outer coatings |
| 07/17/2007 | US7243745 Cutting elements and rotary drill bits including same |
| 07/10/2007 | US7240744 Rotary and mud-powered percussive drill bit assembly and method |
| 07/04/2007 | EP1802843A1 Drill bushing |
| 07/03/2007 | US7237625 Device for simulataneously casing a hole while drilling |
| 06/28/2007 | WO2007073276A1 Pulse generator and impulse machine for a cutting tool |
| 06/28/2007 | WO2007073275A1 Damping and drilling machine including such a damping device |
| 06/26/2007 | US7234537 Sonic drill |
| 06/26/2007 | CA2289301C Casing hammer assembly for cable tool drilling apparatus |
| 06/20/2007 | EP1797274A1 A drilling apparatus having in-line extending wings and driving method thereof |
| 06/20/2007 | CN1984755A Method for controlling percussion device, software product, and percussion device |
| 06/20/2007 | CN1982645A Automatic spt monitor |
| 06/07/2007 | WO2007062490A1 Fluid flow control means for a reverse circulation down hole hammer |
| 06/06/2007 | EP1791681A1 Method for breaking rock |
| 05/30/2007 | EP1540219B1 Method and apparatus for replacement of underground pipe |
| 05/18/2007 | WO2007056035A1 Backhead and drill assembly with backhead |
| 05/08/2007 | CA2395837C Percussive down-the-hole rock drilling hammer and piston therefor |
| 05/03/2007 | US20070095550 Apparatus and method for three-dimensionally planting pile |
| 05/02/2007 | EP1778443A1 Method for controlling percussion device, software product, and percussion device |
| 05/02/2007 | CN2895690Y Drill-rod-free pull-fore well-drilling propelling apparatus |
| 04/24/2007 | US7207633 Scaling assembly |
| 04/19/2007 | US20070085409 Method and means for processing oil sands while excavating |
| 04/11/2007 | CN1309927C Impact device |
| 04/10/2007 | US7201235 Driver drill |
| 04/03/2007 | CA2227499C Pneumatic impact tool |
| 03/29/2007 | US20070068675 Method for drilling and completing wells |
| 03/21/2007 | EP1421252B1 Washpipe assembly |
| 03/21/2007 | CN1934330A Water hammer |
| 03/13/2007 | US7188677 Tensioning system for production tubing in a riser at a floating installation for hydrocarbon production |
| 03/06/2007 | US7185716 Electrically sequenced tractor |
| 02/28/2007 | EP0946338B1 Method for adjusting drilling of drilling machine and rock drill |
| 02/28/2007 | CN1921987A Pressure-fluid-operated percussion device |
| 02/28/2007 | CN1920237A Oil frog free energy-saving pusher leg drill |
| 02/28/2007 | CN1301826C Method and apparatus for monitoring operation of percussion device |
| 02/21/2007 | EP1753931A1 Pneumatic perforator |
| 02/14/2007 | EP1752607A2 Washpipe assembly |
| 02/13/2007 | US7174974 Electrically sequenced tractor |
| 02/07/2007 | CN2866444Y Hoist type impact drill clutch pneumatic controller |
| 01/25/2007 | WO2006127033A3 Percussion tool |
| 01/11/2007 | WO2005038147A3 Scaling assembly |
| 01/09/2007 | US7159671 Power tool with reverse gearing operated by external maneuver ring |
| 01/02/2007 | US7156188 Pile driver with energy monitoring and control circuit |
| 12/27/2006 | CN2851497Y Air-leg type rock drill |
| 12/19/2006 | US7150317 Use of electromagnetic acoustic transducers in downhole cement evaluation |
| 12/13/2006 | EP1730381A1 Water hammer |
| 12/13/2006 | EP1334257B1 Jar with electrical conductor |
| 11/30/2006 | WO2006126928A1 Impulse generator, hydraulic impulse tool and method for producing impulses |
| 11/30/2006 | CA2607415A1 Impulse generator, hydraulic impulse tool and method for producing impulses |
| 11/28/2006 | US7140450 Percussion tool |
| 11/28/2006 | CA2331381C A method for the formation of a plug in a petroleum well |
| 11/22/2006 | CN1285824C Submersible pump type hydraulic impactor |
| 11/15/2006 | EP1720685A1 Pressure-fluid-operated percussion device |
| 11/15/2006 | CN2837622Y Valve cover positioning mechanism for pneumatic crusher |
| 11/15/2006 | CN1863981A Method and device for boring holes in soil or rock |
| 11/14/2006 | US7136795 Control method for use with a steerable drilling system |
| 11/09/2006 | US20060248701 Hammer |
| 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 | EP1354119B1 Method for rock-chiselling |
| 10/11/2006 | EP1709280A2 System, method and apparatus for petrophysical and geophysical measurements at the drilling bit |
| 10/11/2006 | CN2825753Y Hole making device with impact shovel for winch |
| 10/11/2006 | CN1844637A Underwater hydraulic impacting shovel |
| 09/28/2006 | WO2006100350A1 Percussion device |
| 09/28/2006 | US20060213690 Rock drilling machine and axial bearing |
| 09/26/2006 | US7111695 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |
| 09/19/2006 | CA2316796C Downhole apparatus |
| 09/07/2006 | US20060196696 Electrically sequenced tractor |
| 09/07/2006 | US20060196694 Electrically sequenced tractor |
| 09/06/2006 | CN2813869Y Portable adjustable hydraulic percussion drill |
| 08/30/2006 | CN2811701Y Multi-way exhaust valve type connector for pneumatic bolt drill |
| 08/29/2006 | US7097255 Method and means for processing oil sands while excavating |
| 08/24/2006 | WO2006047386A3 Underground piercing tool |
| 08/24/2006 | US20060185904 Rotatable support for inclinable masts of drilling machines |
| 08/23/2006 | EP1325207B1 Gas operated pump for use in a wellbore |
| 08/23/2006 | CN2809181Y Three claw type lever pressing hole-forming tubular drill |
| 08/22/2006 | US7093671 Pneumatic rock-boring device and method for starting such a device |
| 08/17/2006 | US20060180352 Method and device for the drilling of holes in ground or rocky material |
| 08/16/2006 | CN1818321A Drilling impeller without drilling rod pulling force |
| 08/16/2006 | CN1270047C Drilling bit percussion apparatus for drill |
| 08/15/2006 | CA2331700C Pneumatic ground piercing tool with movable chisel head |
| 08/10/2006 | US20060175091 Control valve in a percussion device and a method comprising a closed pressure space at the end position of the piston |
| 08/09/2006 | EP1687504A2 System for extracting natural gas hydrate |
| 07/27/2006 | US20060162961 Sonic drill |
| 07/26/2006 | EP1682745A1 Method and device for the drilling of holes in ground or rocky material |
| 07/25/2006 | US7080701 Electrically sequenced tractor |
| 07/25/2006 | CA2329533C Hammer device |
| 07/19/2006 | EP1488072B1 A method for applying an anti-corrosion coating to especially corrosion exposed parts in rock drill equipment |
| 07/18/2006 | US7077206 Method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores |
| 06/29/2006 | US20060142166 Method using particulate chelates to stimulate production of petroleum in carbonate formations |