| Patents for E21B 12 - Accessories for drilling tools (993) |
|---|
| 03/25/2003 | US6536192 Drill bit packages and methods |
| 03/06/2003 | WO2002038915A3 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator |
| 02/13/2003 | US20030029642 Drill bits with reduced exposure of cutters |
| 01/23/2003 | US20030015351 Method and system for predicting performance of a drilling system of a given formation |
| 12/27/2002 | WO2002038908A3 Differential sensor measurements to detect drill bit failure |
| 11/28/2002 | WO2002057589A9 Internal power source for downhole detection system |
| 11/26/2002 | US6484824 Failure indicator for rolling cutter drill bit |
| 11/07/2002 | WO2002038914A3 System and method for signalling downhole conditions to surface |
| 10/17/2002 | US20020148648 Internal power source for downhole detection system |
| 10/17/2002 | US20020148646 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator |
| 10/17/2002 | US20020148644 Differential sensor measurement method and apparatus to detect a drill bit failure and signal surface operator |
| 10/17/2002 | US20020148616 Apparatus and method for remote adjustment of drill string centering to prevent damage to wellhead |
| 10/10/2002 | WO2002038909A3 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator |
| 10/10/2002 | US20020144842 System and method for signalling downhole conditions to surface |
| 10/08/2002 | US6460631 Drill bits with reduced exposure of cutters |
| 10/03/2002 | US20020139581 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator |
| 09/28/2002 | CA2369669A1 Iterative drilling simulation process for enhanced economic decision making |
| 09/26/2002 | WO2002038908A9 Differential sensor measurements to detect drill bit failure |
| 09/12/2002 | US20020124652 Spectral power ratio method and system for detecting drill bit failure and signaling surface operator |
| 09/06/2002 | WO2002038916A3 An apparatus and method for determining downhole bit failure |
| 09/05/2002 | US20020121393 Mill/drill bit |
| 09/04/2002 | EP1236861A1 Mill/drill bit |
| 09/02/2002 | CA2374086A1 Mill/drill bit |
| 07/25/2002 | WO2002057589A2 Internal power source for downhole detection system |
| 07/23/2002 | US6421880 Rock drill handle |
| 07/18/2002 | US20020092680 Roller bit rearing wear detection system and method |
| 07/18/2002 | US20020092679 Roller bit bearing failure indicator |
| 07/16/2002 | US6419032 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 07/11/2002 | US20020088647 System and method for detecting roller bit bearing wear through cessation of roller-bit rotation |
| 06/25/2002 | US6408953 Method and system for predicting performance of a drilling system for a given formation |
| 06/11/2002 | US6401843 Drilling head with a cone rock bit |
| 05/28/2002 | US6394186 Apparatus for remote adjustment of drill string centering to prevent damage to wellhead |
| 05/16/2002 | WO2002038916A2 An apparatus and method for determining downhole bit failure |
| 05/16/2002 | WO2002038915A2 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator |
| 05/16/2002 | WO2002038914A2 System and method for signalling downhole conditions to surface |
| 05/16/2002 | WO2002038909A2 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator |
| 05/16/2002 | WO2002038908A2 Differential sensor measurements to detect drill bit failure |
| 05/02/2002 | WO2002035048A1 Solid-state inertial navigation control system for a horizontal drilling machine |
| 04/23/2002 | US6374926 Method of assaying downhole occurrences and conditions |
| 04/03/2002 | CN1082128C Method of assaying work of waderground bit |
| 02/28/2002 | US20020023783 Failure indicator for rolling cutter drill bit |
| 02/27/2002 | EP1182326A2 Indicator for bearing failure of rolling cutter drill bit |
| 02/21/2002 | WO2002014646A1 Auger cleaning device |
| 02/07/2002 | US20020014425 Drill bit packages and methods |
| 12/27/2001 | US20010054514 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 12/05/2001 | EP1159510A2 Wellbore primary barrier and related systems |
| 11/22/2001 | US20010042642 Iterative drilling simulation process for enhanced economic decision making |
| 10/18/2001 | US20010030063 Drill bits with reduced exposure of cutters |
| 10/09/2001 | US6298930 Drill bits with controlled cutter loading and depth of cut |
| 09/26/2001 | EP0697057B1 Drill bit and other downhole tools |
| 06/13/2001 | CN2434422Y Running life signal generator of turbine driller |
| 05/23/2001 | CN2431395Y Oil storage sealing compensating structure for inwell power drilling tool |
| 05/23/2001 | CN2431394Y Metal end face sealing structure for power drilling tool |
| 05/15/2001 | US6230822 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 05/09/2001 | EP1098064A1 Auger drilling device |
| 04/19/2001 | WO2001026839A1 Method and apparatus for detecting wear at connections between pin and box joints |
| 04/03/2001 | US6209636 Wellbore primary barrier and related systems |
| 03/20/2001 | US6202752 Wellbore milling methods |
| 03/14/2001 | CN2423446Y Oil-filled sealing lubricating power drilling tool planet-gear speed reducer |
| 03/13/2001 | US6199656 Casing for noise attenuation in a rock drilling rig |
| 03/07/2001 | EP1081329A1 Auger wiper |
| 02/20/2001 | US6189681 Auger cleaners |
| 02/15/2001 | DE19941409C1 Screw cleaner for helical drilling tool has 2 offset cleaning elements pivoted relative to common holder into and out of engagement with helical screw thread of drilling tool via drive unit |
| 02/08/2001 | WO2000039412A3 A casing for noise attenuation in a rock drilling rig and an arrangement in conjunction with a rock drilling rig |
| 01/17/2001 | EP1068425A1 Drillstring with stabilisers for re-entering a primary wellbore |
| 01/04/2001 | WO2000053887A3 Wellbore primary barrier and related systems |
| 01/02/2001 | US6167833 Wear indicator for rotary drilling tools |
| 10/17/2000 | US6131673 Method of assaying downhole occurrences and conditions |
| 09/27/2000 | EP1039094A1 Roller drill bit with sealing device |
| 09/26/2000 | CA2302406A1 Drilling head with a cone rock bit |
| 09/14/2000 | WO2000053887A2 Wellbore primary barrier and related systems |
| 09/05/2000 | US6112812 Wellbore milling method |
| 08/29/2000 | US6109368 Method and system for predicting performance of a drilling system for a given formation |
| 08/17/2000 | WO2000047862A1 Rock drill handle |
| 08/17/2000 | CA2362278A1 Rock drill handle |
| 07/11/2000 | CA2093041C System and method for controlling drill bit usage and well plan |
| 07/06/2000 | WO2000039412A2 A casing for noise attenuation in a rock drilling rig and an arrangement in conjunction with a rock drilling rig |
| 06/21/2000 | EP0815344B1 Whipstock |
| 05/09/2000 | US6059890 Removal sand, silt impurities |
| 04/12/2000 | CN2373553Y Draw-off device for drilling tool stabilizer |
| 03/16/2000 | DE19838199C1 Bohrer zur Bodenprobenentnahme Drill for soil sampling |
| 03/14/2000 | US6035939 Wellbore anchor system |
| 03/01/2000 | EP0982467A2 Drill for obtaining soil samples |
| 02/08/2000 | US6022176 Tool bit with marking member |
| 01/04/2000 | US6009611 Method for detecting wear at connections between pin and box joints |
| 12/22/1999 | EP0964977A1 Improved auger cleaners |
| 12/01/1999 | EP0960261A1 Tool and method for drilling a lateral well |
| 12/01/1999 | EP0960260A1 Tool for making an opening in a tubular in a wellbore |
| 11/10/1999 | EP0750716B1 Milling tool |
| 10/07/1999 | WO1999050528A1 Drillstring with stabilisers for re-entering a primary wellbore |
| 07/22/1999 | WO1999036659A1 A method and an arrangement for detecting and localizing foul matter internally in a pipe string |
| 07/08/1999 | WO1999034086A1 Improved auger cleaners |
| 06/10/1999 | WO1999028590A1 Drilling tools and wear detection methods |
| 05/19/1999 | EP0916014A1 Apparatus and method for milling a hole in casing |
| 05/11/1999 | US5901797 Drilling apparatus with dynamic cuttings removal and cleaning |
| 04/21/1999 | CN1214755A Method of regulating drilling conditions applied to well bit |
| 04/21/1999 | CN1214754A Method of assaying downhole occurrences and conditions |
| 03/30/1999 | US5887668 Wellbore milling-- drilling |
| 03/30/1999 | US5887655 Wellbore milling and drilling |
| 01/27/1999 | CN2305480Y Ampere display and hand operated controller for dry and wet drilling machine |