| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 03/21/1996 | WO1996008334A1 Drilling tool |
| 03/21/1996 | CA2198372A1 Drilling tool |
| 03/20/1996 | CN1031353C Diamond composite sheet produced by low temp. electroplating for petroleum drill bit |
| 03/19/1996 | US5499688 PDC insert featuring side spiral wear pads |
| 03/19/1996 | CA2015132C Tool for cutting solid material |
| 03/12/1996 | US5497843 Hollow auger head assembly |
| 03/12/1996 | US5497842 Reamer wing for enlarging a borehole below a smaller-diameter portion therof |
| 03/12/1996 | US5497841 For reinforcing a structure |
| 03/07/1996 | WO1996007011A1 Drilling head with cutters in arrow-shaped array |
| 03/07/1996 | WO1996007010A1 Roller cone rock bit having a sealing system with double elastomer seals |
| 03/07/1996 | WO1996006698A1 Stamping- and cutting device including a soldering jig for core drill pipes and procedure by use of such device |
| 03/06/1996 | EP0699817A2 Tool insert |
| 03/06/1996 | EP0699816A2 Thrust face lubrication system for a rolling cutter drill bit |
| 03/06/1996 | CN2221654Y Diamond-hard alloy composite drill tooth |
| 03/06/1996 | CN1117901A Production method for single-double-line integrate alloy internal chip-removal depth drill |
| 03/05/1996 | US5496638 Diamond tools for rock drilling, metal cutting and wear part applications |
| 03/05/1996 | US5496137 Cutting insert |
| 03/05/1996 | US5495903 Pulsation nozzle, for self-excited oscillation of a drilling fluid jet stream |
| 03/05/1996 | US5495899 For enlarging a borehole in a subterranean formation |
| 03/05/1996 | CA2048398C Hydraulic action for rotary drill bits |
| 02/29/1996 | WO1996006261A1 Device and method for augering a conical hole in solid media |
| 02/29/1996 | CA2174519A1 Device and method for augering a conical hole in solid media |
| 02/28/1996 | CN2221098Y Special bottom expanding drill |
| 02/27/1996 | US5494477 Abrasive tool insert |
| 02/27/1996 | US5494124 Negative pressure vortex nozzle |
| 02/27/1996 | US5494123 Drill bit with protruding insert stabilizers |
| 02/27/1996 | US5494122 Composite nozzles for rock bits |
| 02/27/1996 | US5494121 Cavern well completion method and apparatus |
| 02/27/1996 | CA2033701C Means for mounting a roller cutter on a drill bit |
| 02/22/1996 | WO1996005406A1 Rotary drill bit and method for manufacture and rebuild |
| 02/22/1996 | WO1996005405A1 Rock bit with enhanced fluid return area |
| 02/22/1996 | WO1996005404A1 Rotary cone drill bit with improved support arms |
| 02/22/1996 | WO1996005403A1 Modular rotary drill bit |
| 02/21/1996 | EP0697057A1 Drill bit and other downhole tools |
| 02/20/1996 | US5492188 For use in an earth drilling bit |
| 02/20/1996 | US5492187 Twist drill |
| 02/20/1996 | US5492186 Steel tooth bit with a bi-metallic gage hardfacing |
| 02/20/1996 | US5492184 Earth boring device |
| 02/15/1996 | WO1996004457A1 Device and method for making a slot in an underground formation |
| 02/14/1996 | CN1116683A Core bits |
| 02/14/1996 | CN1031007C Hole opener for the top hole section of oil/gas wells |
| 02/13/1996 | US5490570 Earth boring bit and lubricator/compensator therefor |
| 02/08/1996 | WO1996003567A1 Fixed-cutter drill bit assembly and method |
| 02/07/1996 | EP0695851A2 Improvements in or relating to rolling cutter drill bits |
| 02/07/1996 | CN1116143A Composite material containing diamond |
| 02/06/1996 | US5488999 Drill bit for geological exploration |
| 02/01/1996 | WO1996002728A1 Emf sacrificial anode sub and method to deter bit balling |
| 01/31/1996 | EP0694113A1 Integrated drilling and rock bolting apparatus |
| 01/31/1996 | EP0523093B1 Ring clamp for a cutter ring in a tunnel drilling machine |
| 01/31/1996 | CN2218826Y Gun perforation flexible pipe extending and punching apparatus |
| 01/31/1996 | CN1115993A System for in situ replacement of cutting means for a ground drill |
| 01/31/1996 | CN1030851C Bottom-hole jet regulator for use on drill bit |
| 01/30/1996 | US5487436 Cutter assemblies for rotary drill bits |
| 01/30/1996 | US5487435 Mounting system for raise and shaft cutters |
| 01/30/1996 | US5487434 Rock drill with conveying groove |
| 01/30/1996 | CA2014145C Milling tool and combined stabiliser |
| 01/24/1996 | EP0693158A1 Ground displacement auger head for making piles in the ground |
| 01/23/1996 | US5486137 Abrasive tool insert |
| 01/23/1996 | US5485891 Cone drill bit |
| 01/23/1996 | US5485890 For drilling subterranean formations |
| 01/23/1996 | US5485888 Spherical reaming bit |
| 01/18/1996 | DE4430784C1 Bohrkopf Wellhead |
| 01/17/1996 | EP0692612A2 Method for drilling with a drilling tool having an eccentrical mounted shaft |
| 01/17/1996 | EP0692607A2 Tool component with abrasive compact |
| 01/17/1996 | EP0692062A1 Down-hole hammer drill having reverse circulation and drill bit for the hammer drill |
| 01/16/1996 | US5484330 Abrasive tool insert |
| 01/16/1996 | US5484191 Insert for tungsten carbide tool |
| 01/11/1996 | DE19523988A1 Reliable, easily demounted attachment, for the rotary cutters of an earth boring bit |
| 01/10/1996 | EP0691167A1 Abrasive tool insert |
| 01/10/1996 | EP0484473B1 Drill head with nozzles |
| 01/10/1996 | CN2217098Y PDC drilling rod with anti-back-rotating function |
| 01/09/1996 | US5482124 Rock drill |
| 01/04/1996 | DE4422462A1 Hollow boring tool for drilling concrete |
| 01/03/1996 | CN1114387A Nesting tooth fixing method for hard alloy columnar teeth |
| 01/02/1996 | US5479997 Earth-boring bit with improved cutting structure |
| 12/27/1995 | EP0688937A1 Improvements in or relating to elements faced with superhard material |
| 12/27/1995 | CN2216137Y Composite hard alloy bit of roller type |
| 12/26/1995 | US5477934 Lubricating mechanism and method for a rotary cutter |
| 12/21/1995 | WO1995034740A1 Drilling apparatus |
| 12/21/1995 | WO1995034398A1 Drilling tool with internal cavities for chip removal |
| 12/21/1995 | WO1995034397A1 Drilling tool with rounded insert support surfaces |
| 12/21/1995 | CA2192578A1 Drilling tool with rounded insert support surfaces |
| 12/20/1995 | EP0687800A1 Improvements in or relating to elements faced with superhard material |
| 12/20/1995 | EP0687799A1 Improvements in or relating to elements faced with superhard material |
| 12/20/1995 | EP0687798A1 Improvements in or relating to elements faced with superhard material |
| 12/20/1995 | EP0687797A1 Improvements in or relating to elements faced with superhard material |
| 12/19/1995 | US5476149 Pilot bit |
| 12/14/1995 | WO1995033911A1 Drill bit |
| 12/14/1995 | DE4420398A1 Combination cutting tool used for machining stone |
| 12/13/1995 | CN2215017Y High-efficiancy diamond compounded piece bit |
| 12/13/1995 | CN1030512C Disc drill bit |
| 12/12/1995 | US5475309 Sensor in bit for measuring formation properties while drilling including a drilling fluid ejection nozzle for ejecting a uniform layer of fluid over the sensor |
| 12/12/1995 | US5474143 Drill bit reamer stabilizer |
| 12/12/1995 | US5474140 Soil sampling probe |
| 12/12/1995 | CA2041254C Rock bit for a down-the-hole drill |
| 12/09/1995 | CA2151212A1 Underreamer |
| 12/06/1995 | EP0685629A2 Rock drill bit |
| 12/05/1995 | US5472376 Tool component |
| 12/05/1995 | US5472058 Rock bit with mechanical seal |
| 12/05/1995 | US5472057 Drilling with casing and retrievable bit-motor assembly |