| Patents for E21B 12 - Accessories for drilling tools (993) |
|---|
| 04/27/2006 | WO2005118998A8 Horizontal perspective simulator |
| 04/27/2006 | WO2005113926A3 Wear indication apparatus and method |
| 04/25/2006 | US7035778 Method of assaying downhole occurrences and conditions |
| 04/25/2006 | US7032689 Method and system for predicting performance of a drilling system of a given formation |
| 03/09/2006 | DE102004043195A1 Führungsrahmen für ein Erdbohrgerät Guiding framework for an earth boring |
| 03/08/2006 | EP1632644A2 Method and apparatus for monitoring and recording of operating conditions of a downhole drill bit during drilling operations |
| 03/08/2006 | EP1632643A2 Method and apparatus for monitoring and recording of operating conditions of a downhole drill bit during drilling operations |
| 03/08/2006 | CN2763462Y Expandable pipe bit |
| 02/07/2006 | CA2225124C Drill tube |
| 01/24/2006 | CA2148117C A biodegradable wellbore fluid comprising n-alkanes |
| 01/18/2006 | EP1616649A1 Drill bit with cutting plate or cutting head and wear mark |
| 01/10/2006 | CA2278933C Tool and method for drilling a lateral well |
| 12/29/2005 | US20050284661 Method and system for predicting performance of a drilling system for a given formation |
| 12/29/2005 | US20050284660 Drill bits with reduced exposure of cutters |
| 12/22/2005 | US20050281411 Binaural horizontal perspective display |
| 12/21/2005 | EP1350309A4 Internal power source for downhole detection system |
| 12/15/2005 | WO2005119376A2 Horizontal perspective display |
| 12/15/2005 | WO2005118998A1 Horizontal perspective simulator |
| 12/15/2005 | US20050275915 Multi-plane horizontal perspective display |
| 12/15/2005 | US20050275914 Binaural horizontal perspective hands-on simulator |
| 12/15/2005 | US20050275913 Binaural horizontal perspective hands-on simulator |
| 12/01/2005 | WO2005113926A2 Wear indication apparatus and method |
| 12/01/2005 | US20050264858 Multi-plane horizontal perspective display |
| 12/01/2005 | US20050264857 Binaural horizontal perspective display |
| 12/01/2005 | US20050264559 Multi-plane horizontal perspective hands-on simulator |
| 12/01/2005 | US20050264558 Multi-plane horizontal perspective hands-on simulator |
| 12/01/2005 | CA2566480A1 Wear indication apparatus and method |
| 11/01/2005 | CA2278932C Tool for making an opening in a tubular in a wellbore |
| 10/06/2005 | WO2005093203A1 Automatic cleaning device |
| 09/22/2005 | WO2005086565A2 Leadless sub assembly for downhole detection system |
| 09/14/2005 | CN2725500Y Sphericlly driven flexible PDC drill short piece |
| 09/13/2005 | CA2161874C Drill bit and other downhole tools |
| 08/30/2005 | US6935441 Drill bits with reduced exposure of cutters |
| 08/24/2005 | CN2720078Y Drill-bit opening mechanism |
| 07/28/2005 | US20050161237 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device |
| 07/07/2005 | US20050149306 Iterative drilling simulation process for enhanced economic decision making |
| 05/24/2005 | CA2262106C Apparatus and method for milling a hole in casing |
| 05/18/2005 | CN1616793A Stabilizer for reducing drilling tool |
| 05/11/2005 | CN2698954Y Expanding bucket for drilling and pouring expanded-base pile |
| 04/12/2005 | CA2164442C Apparatus for use in a wellbore |
| 04/07/2005 | US20050072014 Drill bit and stabilizer gauge |
| 12/15/2004 | CN2663644Y Salvaging cup of following drill |
| 11/16/2004 | US6817425 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator |
| 11/16/2004 | CA2181562C Milling tool |
| 11/11/2004 | US20040222018 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 11/04/2004 | US20040216926 Drill bits with reduced exposure of cutters |
| 10/13/2004 | CN1536195A Bit pup joint capable of producing hydraulic pulsation in downhole |
| 09/23/2004 | US20040182606 Method and system for predicting performance of a drilling system for a given formation |
| 09/01/2004 | CN2637699Y Sand-proof antiblock screw stem drilling apparatus |
| 08/24/2004 | US6779613 Drill bits with controlled exposure of cutters |
| 08/12/2004 | WO2003086042A9 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device |
| 08/04/2004 | EP1159510B1 Wellbore primary barrier and related systems |
| 07/14/2004 | CN2625560Y Bit sub capable of generating waterpower pulse at well bottom |
| 07/14/2004 | CN1512032A Real-time monitoring method and syste mfor cone bit wear situation |
| 06/17/2004 | WO2003086042A3 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device |
| 04/27/2004 | US6725947 Roller bits with bearing failure indication, and related methods, systems, and methods of manufacturing |
| 04/20/2004 | US6722450 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator |
| 04/15/2004 | US20040069539 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 04/14/2004 | CN2611573Y Anti-torque pull head |
| 04/07/2004 | CN2610060Y Petroleum drilling tool screwed nipple |
| 04/07/2004 | CN2610059Y Water-surge apparatus |
| 03/30/2004 | US6712160 Leadless sub assembly for downhole detection system |
| 03/25/2004 | US20040059554 Method of assaying downhole occurrences and conditions |
| 03/10/2004 | EP0964977B1 Improved auger cleaners |
| 03/02/2004 | US6698536 Roller cone drill bit having lubrication contamination detector and lubrication positive pressure maintenance system |
| 02/17/2004 | US6691802 Internal power source for downhole detection system |
| 02/10/2004 | CA2047006C Method of determining the drilling conditions associated with the drilling of a formation with a drag bit |
| 01/27/2004 | US6681633 Spectral power ratio method and system for detecting drill bit failure and signaling surface operator |
| 01/07/2004 | EP0916014B1 Apparatus and method for milling a hole in casing |
| 01/01/2004 | US20040000430 Iterative drilling simulation process for enhanced economic decision making |
| 12/31/2003 | CN2595978Y Real-time monitoring system for wear-degree of tri-cone rotary drill bit |
| 12/03/2003 | EP1367215A1 Auger cleaning device |
| 11/18/2003 | US6648082 Differential sensor measurement method and apparatus to detect a drill bit failure and signal surface operator |
| 10/23/2003 | WO2003086042A2 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device |
| 10/21/2003 | US6634441 System and method for detecting roller bit bearing wear through cessation of roller element rotation |
| 10/14/2003 | US6631772 Roller bit rearing wear detection system and method |
| 10/08/2003 | EP1350309A2 Internal power source for downhole detection system |
| 10/02/2003 | US20030187582 Method of assaying downhole occurrences and conditions |
| 09/30/2003 | US6626251 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 09/09/2003 | US6615921 Apparatus and method for remote adjustment of drill string centering to prevent damage to wellhead |
| 09/03/2003 | EP1340069A2 Spectral power ratio method and system for detecting drill bit failure and signaling surface operator |
| 09/02/2003 | US6612382 Iterative drilling simulation process for enhanced economic decision making |
| 08/27/2003 | EP1068425B1 Drillstring with stabilisers for re-entering a primary wellbore |
| 08/13/2003 | CN2565964Y Turbo-drilling tool intermediated bearing section with thrust ball bearing |
| 08/13/2003 | CN2565963Y Turbo-drilling tool intermediated bearing section with diamond thrust bearing |
| 08/13/2003 | CN2565962Y Rubber sealed turbo-drilling tool intermediated bearing section with oil storage compensator |
| 07/24/2003 | WO2002057589A3 Internal power source for downhole detection system |
| 06/24/2003 | US6581453 Method and apparatus for detecting and localizing unwanted matter internally in a pipe string |
| 06/03/2003 | US6571886 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 05/29/2003 | US20030097772 Excavation cleanup device |
| 05/27/2003 | US6568492 Drag-type casing mill/drill bit |
| 05/14/2003 | CN2550479Y Hydraulic power synergy device for drill bit |
| 05/01/2003 | WO2002038914A9 System and method for signalling downhole conditions to surface |
| 05/01/2003 | WO2002038909A9 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator |
| 04/17/2003 | WO2002038916A9 An apparatus and method for determining downhole bit failure |
| 04/08/2003 | US6543312 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 04/03/2003 | US20030062197 Roller cone drill bit having lubrication contamination detector and lubrication positive pressure maintenance system |
| 04/02/2003 | EP0960261B1 Tool and method for drilling a lateral well |
| 04/02/2003 | EP0960260B1 Tool for making an opening in a tubular in a wellbore |
| 04/01/2003 | US6540033 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |