| Patents for E21B 12 - Accessories for drilling tools (993) |
|---|
| 01/19/2011 | CN201714302U Drilling device |
| 01/19/2011 | CN101509351B Non-damage drilling head |
| 01/12/2011 | CN201705199U Sealing device of power head box of rotary drilling rig and rotary drilling rig |
| 12/29/2010 | WO2010150185A1 Muffler for pneumatic rock drill |
| 12/29/2010 | CN101929311A Positioning and cooling device for perforating vertical plane |
| 12/22/2010 | EP2262973A1 Method and separation conduit for handling lubricant mist, and rock drilling rig |
| 12/09/2010 | US20100307835 Drill Bit with Weight and Torque Sensors |
| 12/01/2010 | CN201661242U Large-aperture petroleum drilling and production impactor |
| 11/17/2010 | CN101886525A Breakage-preventing drilling bit |
| 11/11/2010 | WO2010129526A2 Methods and apparatuses for measuring drill bit conditions |
| 11/10/2010 | CN201627538U Chiseling assistant device |
| 11/10/2010 | CN201627537U Tightening device for hydrodynamic variable-diameter spiral stabilizer |
| 11/10/2010 | CN201627536U Self-detaching type drill bit of rotary drilling rig |
| 11/09/2010 | US7828079 Sonic wireline dry slough barrel |
| 10/21/2010 | US20100264608 Chuck assembly for a down-hole drill |
| 10/19/2010 | US7814990 Drilling apparatus with reduced exposure of cutters and methods of drilling |
| 10/13/2010 | CN201606008U 一种防突钻机专用灭尘装置 A sudden rig special anti-dust suppression device |
| 10/12/2010 | US7810559 Wellbore consolidating tool for rotary drilling applications |
| 10/07/2010 | WO2010065808A4 Method of monitoring wear of rock bit cutters |
| 09/14/2010 | US7796134 Multi-plane horizontal perspective display |
| 09/07/2010 | US7789588 Subsea system provided with a controllable curvature flexible pipe |
| 09/02/2010 | WO2010099073A1 Methods and apparatuses for estimating drill bit condition |
| 09/01/2010 | CN201568050U Signal transmission device |
| 09/01/2010 | CN201567964U Dedicated movable service arm for cables and hoses of ocean-module drilling machines |
| 09/01/2010 | CN201567955U Water driller of circulating self-absorption adapting form engineering |
| 08/26/2010 | US20100212961 Methods and apparatuses for estimating drill bit condition |
| 08/25/2010 | CN201560716U Mine bolting support wet drilling device |
| 08/19/2010 | WO2010065808A3 Method of monitoring wear of rock bit cutters |
| 08/19/2010 | DE19983531B4 Ummantelung zur Geräuschdämpfung bei einer Gesteinsbohrausrüstung Jacket for noise attenuation at a rock drilling |
| 08/11/2010 | CN201546627U Active type slurry removing apparatus |
| 08/10/2010 | US7770664 Wear indicators for expandable earth boring apparatus |
| 08/05/2010 | WO2010033583A3 Core removal system and method |
| 07/28/2010 | CN201535139U Spiral drill bar soil cleaning device |
| 07/28/2010 | CN201535138U Connecting device of rotary drill bracket and vehicle body |
| 07/20/2010 | CA2589874C Inline bladder-type accumulator for downhole applications |
| 07/14/2010 | CN101775965A Open-top composite clamp holder |
| 07/07/2010 | CN101772615A Downhole applications of composites having aligned nanotubes for heat transport |
| 06/17/2010 | WO2010068727A1 Real time dull grading |
| 06/17/2010 | US20100147590 Apparatus and method for mounting acoustic sensors closer to a borehole wall |
| 06/17/2010 | CA2746092A1 Real time dull grading |
| 06/16/2010 | CN101737001A Novel wall surface drilling machine oil supplying sleeve |
| 06/10/2010 | WO2010065808A2 Method of monitoring wear of rock bit cutters |
| 06/10/2010 | US20100139975 Method of monitoring wear of rock bit cutters |
| 06/10/2010 | CA2745723A1 Method of monitoring wear of rock bit cutters |
| 06/01/2010 | US7726415 Fixed cutter drill bit |
| 05/12/2010 | CN201460817U Drill stem mud scrapping tool |
| 05/06/2010 | US20100108380 Methods and apparatuses for estimating drill bit cutting effectiveness |
| 04/27/2010 | US7707009 Drill bit performance analysis tool |
| 04/14/2010 | CN201437689U Locking pin mechanism for vertical drilling tool |
| 04/14/2010 | CN201437688U Spray dust removal device for point detecting equipment |
| 04/07/2010 | EP2171206A2 Downhole applications of composites having aligned nanotubes for heat transport |
| 04/06/2010 | US7693695 Methods for modeling, displaying, designing, and optimizing fixed cutter bits |
| 03/31/2010 | EP2169176A2 Downhole drilling vibration analysis |
| 03/25/2010 | WO2010033583A2 Core removal system and method |
| 03/25/2010 | WO2010033097A1 Earth-boring cutter mount and assembly |
| 03/19/2010 | CA2679189A1 Blast hole drill bit carousel and a blast hole drill including a blast hole drill bit carousel |
| 03/19/2010 | CA2678567A1 Seal assembly |
| 03/11/2010 | WO2010026404A1 Downhole tool protector apparatus and method |
| 03/11/2010 | US20100059280 Feed mechanism for drilling systems |
| 03/04/2010 | US20100051292 Drill Bit With Weight And Torque Sensors |
| 02/25/2010 | WO2009148784A3 Wear indicators for expandable earth boring apparatus |
| 02/18/2010 | CA2675194A1 Rotary drill bit |
| 01/06/2010 | CN101619645A Automatic soil-discharging device for long auger machine |
| 12/30/2009 | CN201372733Y Water drill punching sheath |
| 12/30/2009 | CN201372288Y T-shaped wedge-type quick drill bushing |
| 12/23/2009 | CN201367857Y Protective casing for water-cooled drilling bit |
| 12/10/2009 | WO2009148784A2 Wear indicators for expandable earth boring apparatus |
| 12/10/2009 | CA2720134A1 Wear indicators for expandable earth boring apparatus |
| 12/03/2009 | US20090294173 Wear indicators for expandable earth boring apparatus |
| 12/02/2009 | CN101595272A Microtunnelling system and apparatus |
| 12/01/2009 | US7624810 Ball dropping assembly and technique for use in a well |
| 11/25/2009 | CN100562406C Plier |
| 11/19/2009 | US20090283330 Downhole Material Retention Apparatus |
| 11/19/2009 | US20090283324 Mobile drilling rig |
| 11/12/2009 | US20090277688 Sonic wireline dry slough barrel |
| 11/10/2009 | US7614463 Flute-wiping auger cleaner |
| 10/22/2009 | US20090260882 Braking devices and methods for use in drilling operations |
| 10/21/2009 | CN201330563Y Hammerhead anti-dropping device of pneumatic hammer for gas drilling |
| 10/14/2009 | CN101555773A Rotating type drill rod storage mechanism used for submarine automatic extension rod drilling rig |
| 10/13/2009 | US7600581 Downhole abrading tools having fusible material and uses therefor |
| 09/17/2009 | WO2009112637A1 Method and separation conduit for handling lubricant mist, and rock drilling rig |
| 09/17/2009 | CA2716160A1 Method and separation conduit for handling lubricant mist, and rock drilling rig |
| 09/16/2009 | CN101530692A Drilling tool filter screen for realizing protection of internal wall of drilling tool |
| 09/02/2009 | EP1902196B1 Method and apparatus for collecting drill bit performance data |
| 08/19/2009 | CN101509351A Non-damage drilling head |
| 08/18/2009 | US7575070 Downhole abrading tools having excessive wear indicator |
| 08/06/2009 | US20090194337 Spiral Ribbed Aluminum Drillpipe |
| 07/23/2009 | US20090183924 Tracked Hydrovacuum Vehicle |
| 07/16/2009 | US20090178853 Mobile soil sampling device with vacuum collector |
| 06/25/2009 | US20090159335 Monitoring apparatus for core barrel operations |
| 06/17/2009 | CN201258694Y Dustproof and waterproof drilling protectors |
| 06/11/2009 | CA2708034A1 Method and apparatus to improve design, manufacture, performance and/or use of well tools |
| 05/28/2009 | US20090133934 Method and device for releasing a block on a bore crown during a boring process |
| 05/21/2009 | US20090126995 Downhole abrading tool having taggants for indicating excessive wear |
| 05/14/2009 | WO2009018559A3 Downhole applications of composites having aligned nanotubes for heat transport |
| 05/13/2009 | CN201236631Y Auxiliary positioning device for drilling |
| 04/29/2009 | CN201228522Y Earth cleaning machine with screw drilling rod |
| 04/23/2009 | US20090101328 Composite drill pipe and method of forming same |
| 04/22/2009 | CN201225098Y Boring tool water course thick oil clog eliminating apparatus |
| 04/22/2009 | CN201225097Y Sludge remover of long screw pile machine drill rod |