Patents for E21B 11 - Other drilling tools (454) |
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10/14/2004 | US20040201234 Post hole digger |
10/13/2004 | EP1466517A1 Post hole digger |
09/29/2004 | CN1533464A Drilling device for earth drill |
09/02/2004 | US20040168831 Drilling device for earth drill |
08/11/2004 | CN2632286Y 螺杆钻具 Screw drill |
04/27/2004 | US6725950 Post hole digger |
04/07/2004 | CN1145193C Wafer carrier |
03/30/2004 | US6712161 Tool and method for soil sampling |
01/28/2004 | EP1384850A2 Downhole packer with anti rotating device |
11/06/2003 | WO2003091532A1 Drilling device for earth drill |
10/28/2003 | US6637521 Earth borer |
08/07/2003 | US20030146021 Post hole digger |
06/19/2003 | WO2003050360A1 A hole cleaning and/or forming tool |
06/17/2003 | US6578721 Pivoted arm for lowering under a slab |
06/04/2003 | CN2554332Y Impact hammer |
05/01/2003 | US20030079891 Ground penetrating tool |
04/17/2003 | DE20301785U1 Earth drilling tool for cutting holes, comprises cutting crown which can be closed with cutting disc once hole has been cut |
04/01/2003 | US6540443 Apparatus for and a method of boring the ground |
03/26/2003 | EP1296017A1 Auger |
03/25/2003 | US6536541 Boring unit for pile foundations |
02/26/2003 | EP1285250A1 Device for taking samples from a material of granular or powdery composition |
01/23/2003 | WO2003006782A1 Hole digger |
01/16/2003 | US20030010538 Earth borer |
01/16/2003 | US20030010537 Hole digger |
01/16/2003 | US20030010536 Hole digger |
12/11/2002 | EP1264937A2 Grab bucket for trench walls with improved control system for the verticality of the excavation |
12/10/2002 | US6491116 Frac plug with caged ball |
12/04/2002 | CN1382896A Hole-forming drilling mahcine with planetary movement for foundation engineering with large-diameter piles |
10/17/2002 | US20020148306 Device for talking samples from a material of granular or powdery composition |
08/27/2002 | US6439629 Post hole digger |
07/25/2002 | US20020096365 Frac plug with caged ball |
07/23/2002 | US6421880 Rock drill handle |
07/18/2002 | US20020092683 Boring unit for pile foundations |
05/30/2002 | WO2002042598A1 Well drilling device |
05/28/2002 | US6394180 Frac plug with caged ball |
05/02/2002 | US20020050365 Electric hand-held tool with percussion mechanism |
04/18/2002 | US20020043377 Garden auger and method re same |
02/20/2002 | CN2477805Y Planetary powder spraying stirring drilling bit |
01/23/2002 | CN1332064A Hand electric tool with percussion device |
01/16/2002 | EP1172521A2 Downhole packer with caged ball valve |
01/10/2002 | DE10030962A1 Elektrohandwerkzeug mit Schlagwerk Electric hand tool with percussion |
01/02/2002 | EP1166970A2 Electrical hand tool with a percussive device |
12/06/2001 | WO2001092847A1 Device for taking samples from a material of granular or powdery composition |
11/27/2001 | US6321861 Auger |
11/15/2001 | US20010041099 Apparatus for and a method of boring the ground |
11/14/2001 | EP1154078A2 Apparatus for and a method of boring the ground |
08/14/2001 | US6273482 Post hole digger |
07/03/2001 | US6254154 Hole digging tool |
05/17/2001 | DE19947214A1 Ram core drilling involves sondes driven in in tandem and connected at target depth with each sonde cylinder bored out and fitted with sample removal opening. |
05/17/2001 | DE10039870A1 Bore gripper is for producing boreholes in suitable ground surfaces and has frame on underside of which are blades pivotable between open and closed positions |
05/08/2001 | US6227317 Garden auger having wings and cutters |
03/28/2001 | EP0800610B1 Apparatus for forming a slot in a wellbore |
03/21/2001 | CN1063515C Borehole boring method and machine |
03/06/2001 | US6196337 Water pressure post-hole digger |
03/06/2001 | US6196334 Excavating tool |
02/22/2001 | WO2001011939A1 Novel post hole digger |
01/09/2001 | US6170893 Implement with reinforcing rib or corrugation |
12/03/2000 | CA2309798A1 Excavating tool |
11/23/2000 | WO2000069769A1 Pivoted arm for lowering under a slab |
11/21/2000 | US6148929 Feeler rod for water mains |
10/04/2000 | CN2399505Y Roofbolt drilling rig |
09/26/2000 | US6123374 Mini hole digger |
08/29/2000 | US6109365 Multi-purpose impact tool |
08/17/2000 | WO2000047862A1 Rock drill handle |
08/15/2000 | US6102135 Portable core sampler |
07/18/2000 | US6089632 Post hole digger |
06/20/2000 | US6076617 Auger apparatus |
06/02/2000 | WO2000009818A3 Implement with reinforcing rib or corrugation |
05/16/2000 | US6062320 Planting and post hole tool |
05/10/2000 | CN1052292C Cutting device for making a slot in an underground formation |
02/24/2000 | WO2000009818A2 Implement with reinforcing rib or corrugation |
02/15/2000 | US6024166 Apparatus for forming a slot in a wellbore |
12/16/1999 | DE19931737A1 Conveyor barrel for removal of sediment from well shafts |
12/01/1999 | CN1046987C Clamshell grab for drilling cylindrical holes |
11/24/1999 | EP0760710B1 Apparatus for lifting and dropping a drop hammer |
10/27/1999 | CA2270264A1 Water pressure posthole digger |
07/21/1999 | CN2329756Y Big diameter multi-bit combined drilling tool |
07/20/1999 | US5924500 Steerable boring machine |
04/14/1999 | CN1042909C Spiral anchor with deoperable screw |
03/17/1999 | EP0902160A2 Auger drill machine with support rod |
12/29/1998 | CA2180929C Shale containment unit for a drilling rig |
11/17/1998 | US5836630 Posthole digger and cleaning attachment |
11/11/1998 | CN2296926Y Large-diameter drilling tool for drilling and coring of hard rock |
11/03/1998 | CA2189855C Method and related cartridge for obtaining a soil sample |
10/21/1998 | CN1196436A Device and process for operating working module |
09/30/1998 | EP0701466B1 A hole-making device |
09/24/1998 | DE19711305A1 Tubular probe for taking ground samples |
09/23/1998 | EP0866210A2 Method for operating a tool and apparatus for transmission of rotary torque and speed of rotation of a drive unit to that tool |
08/25/1998 | US5797705 Method for manufacturing a tubular foundation in the ground |
08/04/1998 | US5788082 Wafer carrier |
07/01/1998 | EP0851090A1 Down-the-hole hammer |
07/01/1998 | EP0774039B1 Device and method for making a slot in an underground formation |
02/11/1998 | CN1173039A Wafer carrier |
12/24/1997 | WO1997048875A1 Down-the-hole hammer |
11/21/1997 | CA2205783A1 Steerable boring machine |
11/11/1997 | US5685587 Posthole digger and cleaning attachment |
10/15/1997 | EP0800610A1 Apparatus for forming a slot in a wellbore |
10/15/1997 | CN2264802Y 螺杆钻具 Screw drill |
09/23/1997 | US5669648 Post hole digger |
09/02/1997 | US5662179 Hole-making device |