| Patents for E21B 10 - Drill bits (19,464) |
|---|
| 02/14/1978 | US4073548 Sealing system for a rotary rock bit |
| 02/14/1978 | US4073354 Earth-boring drill bits |
| 02/14/1978 | US4073353 Sonic large bore earth auger |
| 02/14/1978 | CA1026315A1 Improved boring tool |
| 01/31/1978 | US4071285 Stabilizer |
| 01/31/1978 | US4071098 Cutter mounting extension apparatus |
| 01/31/1978 | US4071097 Process and apparatus for supersonic drilling in underground rocky strata |
| 01/24/1978 | US4069880 Excavation tool |
| 01/24/1978 | US4069878 Raise drilling bit with detachable stem |
| 01/17/1978 | US4068731 Extended nozzle and bit stabilizer and method of producing |
| 01/10/1978 | US4067406 Soft formation drill bit |
| 12/27/1977 | US4064951 Underreamer having cutter arm position indication |
| 12/06/1977 | US4061376 Rock bit bearing structure |
| 12/06/1977 | US4061197 Method and apparatus for drilling in permafrost and the like |
| 11/22/1977 | US4059316 Bearing retaining pin for earth boring drill |
| 11/15/1977 | US4058177 Asymmetric gage insert for an earth boring apparatus |
| 11/15/1977 | US4058176 Tool and method for drilling a hole with an increased cross-sectional area |
| 11/01/1977 | US4056153 Rotary rock bit with multiple row coverage for very hard formations |
| 11/01/1977 | US4056152 Drill bit for reinforced concrete |
| 10/25/1977 | US4055226 Underreamer having splined torque transmitting connection between telescoping portions for control of cutter position |
| 10/25/1977 | US4055225 Lubricant pressure compensator for an earth boring drill bit |
| 10/18/1977 | US4054772 Positioning system for rock bit welding |
| 10/18/1977 | US4054426 Thin film treated drilling bit cones |
| 10/04/1977 | US4051912 Percussion drill bit |
| 09/20/1977 | US4049067 Cutter mounting extension apparatus |
| 09/13/1977 | US4047828 Core drill |
| 09/13/1977 | US4047583 Earth boring cutting element retention system |
| 09/13/1977 | US4047514 Furnace taphole drilling bit |
| 09/06/1977 | US4046431 Water lubricated bearing assembly for mining machine |
| 09/06/1977 | US4046207 Earth drilling tools |
| 09/06/1977 | US4046206 Locking apparatus for earth boring cutter or stabilizer |
| 09/06/1977 | US4046205 Earth auger and method for driving piles and the like by means of said earth auger |
| 08/30/1977 | US4045646 Positioning fixture for rock bit welding |
| 08/23/1977 | US4043411 Rotary rock bit with the bearing pin fused to the rock bit arm |
| 08/23/1977 | US4043409 Drill steel for deep drill hammers |
| 08/16/1977 | US4042048 Drilling technique |
| 08/16/1977 | US4042047 Raise boring head having fluid traversing means |
| 08/16/1977 | US4041650 Material removal tool with multiple cutting edges |
| 08/09/1977 | US4040680 Rock bit having a ball bearing raceway with anti-galling material |
| 08/09/1977 | US4040493 Rock boring cutter with thread-on replaceable cutting element |
| 07/26/1977 | US4037673 Roller cutter drill bit |
| 07/26/1977 | US4037300 Drilling bit bearing structure |
| 07/19/1977 | US4036314 Hole opener with improved rotary cutter mounting |
| 07/19/1977 | US4036313 Mounting for inboard cutters on a raise drill |
| 07/12/1977 | USRE29300 Rotary percussion earth boring bit |
| 07/12/1977 | US4035039 Rock bit assembly |
| 06/28/1977 | US4031974 Boring apparatus capable of boring straight holes |
| 06/28/1977 | US4031973 Placer mining tool |
| 06/28/1977 | US4031972 Expandable and contractible rotary well drilling bit |
| 06/28/1977 | US4031971 Jet nozzle drilling assembly |
| 06/21/1977 | US4030557 Well drilling apparatus and method |
| 06/07/1977 | US4027491 Composite earth drilling auger and method of installing same in situ |
| 06/07/1977 | US4027490 Self-sinking, axial passage foundation pile and method |
| 05/31/1977 | US4026372 Drill bits |
| 05/17/1977 | US4023629 Toggle actuated underreamer |
| 05/10/1977 | US4022287 Percussion drill bit |
| 05/10/1977 | US4022286 Auger |
| 05/10/1977 | US4022285 Drill bit with suction and method of dry drilling with liquid column |
| 05/03/1977 | US4021084 Drilling bit bearing structure |
| 05/03/1977 | US4020910 Sealing between relatively rotating members in boring apparatus |
| 04/26/1977 | US4019785 Drill bit utilizing lubricant thermal expansion and relief valve for pressure control |
| 04/26/1977 | US4019593 Removable drill bit nozzle |
| 04/12/1977 | US4016944 Pneumatic hammer-auger earth boring apparatus |
| 04/12/1977 | US4016942 Method and apparatus for indicating the position of one well bore with respect to a second well bore |
| 04/05/1977 | US4015674 Apparatus for unitizing a pair of augers |
| 03/29/1977 | US4014595 Drill bit with seal ring compensator |
| 03/29/1977 | US4014395 Rock drill bit insert retaining sleeve assembly |
| 03/22/1977 | US4013325 Drill rod stabilizing tool |
| 03/15/1977 | US4012238 Smoothness |
| 03/08/1977 | US4010985 Rotary drill bit |
| 03/08/1977 | US4010808 Expandable raise bit |
| 03/08/1977 | US4010807 Tool for forming a hole for a fastening element |
| 02/15/1977 | US4007799 Raise drill with replaceable stem |
| 02/15/1977 | US4007795 Attachment for a rotary-hammer tool |
| 02/08/1977 | US4006788 Diamond cutter rock bit with penetration limiting |
| 02/01/1977 | US4005906 Impact or demolition tool |
| 01/25/1977 | US4004645 Disc cutting units for use on rock boring machines |
| 01/25/1977 | US4004644 Roller cutter |
| 01/18/1977 | US4003442 Detachable drill bit for impact drilling |
| 01/11/1977 | US4002214 Drilling tool, especially for hammer drills |
| 01/04/1977 | US4000783 Conical boring tool |
| 12/28/1976 | US3999962 Copper-chromium carbide-metal bond for abrasive tools |
| 12/28/1976 | US3999620 Core barrel |
| 12/28/1976 | US3999619 Core barrel |
| 12/21/1976 | US3998500 Mountable cone sub assembly |
| 12/21/1976 | US3998283 Earth boring auger |
| 12/21/1976 | US3998282 Earth boring auger |
| 12/14/1976 | US3997011 Button drill bit structure |
| 12/14/1976 | US3997010 Downhole forward and back scuttling tool |
| 12/07/1976 | US3995917 Aluminum bronze bearing |
| 12/07/1976 | US3995707 Well drilling bit |
| 12/07/1976 | US3995706 Earth auger drill |
| 12/07/1976 | US3995367 Bearing separator and sealing system for rock bit |
| 11/23/1976 | US3993147 Taper lock removable stem for raise bit |
| 11/23/1976 | US3993146 Apparatus for mining coal using vertical bore hole and fluid |
| 11/09/1976 | US3990751 Drill bit |
| 11/09/1976 | US3990525 Sealing system for a rotary rock bit |
| 11/02/1976 | US3989554 Composite hardfacing of air hardening steel and particles of tungsten carbide |
| 11/02/1976 | US3989315 Drill bit |
| 10/26/1976 | US3987859 Unitized rotary rock bit |