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