| Patents for E21B 1 - Percussion drilling (2,080) |
|---|
| 04/28/2004 | EP1412606A1 Impact device |
| 04/27/2004 | US6725932 Down hole jar tool |
| 04/22/2004 | WO2004033840A2 Methods and apparatus for open hole drilling |
| 04/22/2004 | DE10237407A1 Hydraulically operated hammer, comprising additional control edge for opening fluid duct in case of excess motion of piston |
| 04/21/2004 | CN1490493A Horizontal impact groover |
| 04/21/2004 | CN1490472A Plate guided bucket boring process for site casting foundation piles |
| 04/15/2004 | US20040069533 Pneumatic rock-boring device and method for starting such a device |
| 04/08/2004 | WO2004029400A1 Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string |
| 04/08/2004 | US20040065474 Methods and apparatus for open hole drilling |
| 04/01/2004 | US20040060740 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |
| 03/02/2004 | US6698537 Bit retention system |
| 02/26/2004 | DE19923680B4 Verfahren zur Ermittlung der Betriebsdauer und des Einsatz-Zustands eines hydraulischen Schlagaggregats, insbesondere Hydraulikhammer, sowie Vorrichtung zur Durchführung des Verfahrens Method for determining the operating time and the use of state of a hydraulic percussion device, in particular hydraulic hammer, and device for carrying out the method |
| 02/12/2004 | WO2003058023A8 A power transmission unit of an impactor, a hydraulic jet impactor and the application thereof |
| 02/12/2004 | US20040026098 Rock drilling machine |
| 02/05/2004 | WO2004011764A1 Device for simultaneously casing a hole while drilling |
| 02/04/2004 | CN2602149Y Ground foundation exploring pricker |
| 01/29/2004 | WO2004009298A1 Sonic drill |
| 01/29/2004 | CA2493039A1 Sonic drill |
| 01/28/2004 | CN2601294Y Impact viberating drilling appts. |
| 01/15/2004 | WO2004005661A2 System and mehtod for automating or metering fluid recovered at a well |
| 01/13/2004 | US6675909 Hydraulic jar |
| 01/08/2004 | WO2004003331A2 Non-corrosive amphoteric surfactants and method of well treatment |
| 01/08/2004 | CA2490363A1 Non-corrosive amphoteric surfactants and method of well treatment |
| 01/01/2004 | US20040000339 Multiple dispensing check valve delivery system |
| 12/25/2003 | US20030234121 Down hole jar tool |
| 12/24/2003 | CN2594440Y Chain chisel drill |
| 12/24/2003 | CN2594318Y Electric two-purpose machine for piling and punching |
| 12/23/2003 | CA2203736C Guided drilling system with shock absorber |
| 12/18/2003 | WO2003104603A2 New and improved method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores |
| 12/18/2003 | CA2493990A1 New and improved method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores |
| 12/02/2003 | CA2093404C Rock drilling device |
| 12/02/2003 | CA2036883C Drill head with integral impact hammers |
| 11/19/2003 | CN1456755A Electric two-purpose machine for piling and punching |
| 11/06/2003 | WO2003060285A3 Method and means for processing oil sands while excavating |
| 11/05/2003 | EP0843774B1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 10/28/2003 | US6637523 Drilling process monitor |
| 10/22/2003 | EP1354119A2 Method for rock-chiseling |
| 10/15/2003 | CN2580084Y Down-the-hole rock drill |
| 10/08/2003 | EP1102917B1 Arrangement for controlling rock drilling |
| 10/01/2003 | CN2576952Y Drill rod prospecting machine |
| 09/25/2003 | WO2003078788A1 A method for applying an anti-corrosion coating to especially corrosion exposed parts in rock drill equipment |
| 09/25/2003 | CA2479431A1 A method for applying an anti-corrosion coating to especially corrosion exposed parts in rock drill equipment |
| 09/24/2003 | CN2575282Y Adjustable drilling guide mechanism for engineering drilling machine |
| 09/17/2003 | CN2573647Y Portable power pneumatic pick |
| 09/17/2003 | CN2573646Y Rock drill |
| 09/04/2003 | US20030165360 Method and apparatus for replacement of underground pipe |
| 09/03/2003 | EP1339938A2 Boring apparatus |
| 08/28/2003 | WO2003071086A2 Mono-diameter wellbore casing |
| 08/28/2003 | US20030160500 Method and means for processing oil sands while excavating |
| 08/27/2003 | CN2568795Y Lubricating mechanism of headpiece system of pneumatic rock drill |
| 08/21/2003 | US20030155140 Method of opening joints between drilling components, and rock drill |
| 08/14/2003 | US20030150647 Rotary support table |
| 08/05/2003 | CA2104705C Drilling device for a rock drill |
| 07/30/2003 | EP1330589A1 Rock drilling machine |
| 07/24/2003 | WO2003060285A2 Method and means for processing oil sands while excavating |
| 07/24/2003 | WO2003060282A2 Method and apparatus for replacement of underground pipe |
| 07/24/2003 | WO2003060280A2 Rotary support table |
| 07/17/2003 | WO2003058023A1 A power transmission unit of an impactor, a hydraulic jet impactor and the application thereof |
| 07/03/2003 | US20030121703 Electrically sequenced tractor |
| 06/25/2003 | CN2557680Y Domestic well drilling machine |
| 06/25/2003 | CN1112281C Percussion sport apparatus |
| 06/11/2003 | CN2555370Y Telescopic percussion rig |
| 06/11/2003 | CN1111249C Oil supply way for hydraulic support of hydraulic hammer drill and hydraulic hammer drill for realizing said way |
| 06/05/2003 | US20030102167 Bit retention system |
| 06/04/2003 | CN2554329Y Through-type churn drilling tool |
| 06/04/2003 | CN2554328Y Airleg rock drill |
| 06/03/2003 | US6571867 Apparatus for increasing the effective diameter of a wellbore |
| 05/29/2003 | US20030098152 Method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores |
| 05/21/2003 | CN1419034A Down-the-hole hammer percussion static-pressure cased-drilling method for unconsolided and broken formation |
| 05/06/2003 | US6557647 Impact hammer systems and methods |
| 04/24/2003 | WO2003033216A1 Method and apparatus for monitoring operation of percussion device |
| 04/17/2003 | US20030070840 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 04/09/2003 | CN2544084Y Percussion, grabbing, shovelling and planing tape head drill |
| 03/27/2003 | WO2003025337A1 Striking train for a ground-boring machine |
| 03/19/2003 | EP0733152B1 An in-hole rock drilling machine |
| 03/12/2003 | EP1291487A1 Method for soil and stoneworking and hydraulic impact tool |
| 02/26/2003 | CN2537804Y 自动冲击钻 Auto impact drill |
| 02/13/2003 | WO2002044508A3 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |
| 02/06/2003 | WO2003009974A1 Rock drill silencing apparatus |
| 01/28/2003 | US6510902 Method and device for determining the operating time and the operating condition of a hydraulic percussion unit |
| 01/16/2003 | WO2003004822A1 Impact device |
| 01/15/2003 | EP1274916A1 Percussive down-the-hole rock drilling hammer and piston therefor |
| 01/14/2003 | US6505689 Arrangement for controlling rock drilling |
| 01/09/2003 | US20030006052 Valve for hydraulic rock drill |
| 01/02/2003 | EP1270098A2 Method for manufacturing a protective cover for a breaking apparatus, and said breaking apparatus |
| 12/19/2002 | WO2002101192A1 Rock drill |
| 12/19/2002 | US20020190092 Method for manufacturing a protective cover for a breaking apparatus, and a breaking apparatus |
| 12/18/2002 | CN2526487Y Impact drilling rig |
| 12/12/2002 | US20020185312 Impact tool |
| 11/20/2002 | CN2521372Y Pneumatic down-the-hole air hammer |
| 11/20/2002 | CN2521371Y Hand held and air leg two-purpose rock drill |
| 11/12/2002 | US6478097 Electrically sequenced tractor |
| 11/12/2002 | US6478088 Method for the formation of a plug in a petroleum well |
| 11/03/2002 | CA2384549A1 Impact tool |
| 10/17/2002 | WO2002046564A3 Boring apparatus |
| 10/16/2002 | CN1374438A Well drilling machine with shocking, grabbing, spading, planing and drilling heads |
| 10/08/2002 | US6460627 Drilling and/or chiseling device |
| 09/24/2002 | US6454021 Impact machine |
| 09/12/2002 | WO2002055830A3 Method for rock-chiseling |
| 08/27/2002 | US6439318 Downhole apparatus |