Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 10 - Drill bits
Patents for E21B 10 - Drill bits (19,464)
03/1979
03/06/1979CA1049816A1 Rock bit assembly method
02/1979
02/27/1979US4141421 Under reamer
02/27/1979CA1049492A1 Means and method of drilling wells
02/20/1979US4140189 Rock bit with diamond reamer to maintain gage
02/20/1979CA1048996A1 Raise drilling bit with detachable stem
02/13/1979CA1048489A1 Sealing system for a rotary rock bit
02/13/1979CA1048488A1 Unitized rotary rock bit
02/13/1979CA1048486A1 Vacuum, vacuum-pressure, or pressure reverse circulation bit
02/06/1979CA1048012A1 Pneumatic hammer-auger earth boring apparatus
01/1979
01/30/1979US4136748 Roller-type rock bit and bearing arrangement therefor
01/30/1979US4136586 Method for constructing a multiple segment rock bit
01/23/1979US4135588 Boring and compacting tool
01/23/1979CA1047026A1 Tool for cutting groove in hole
01/23/1979CA1047025A1 Temperature-regulated, sealed bearing system afor rock drill bits
01/09/1979US4133397 Drilling with multiple in-hole motors
01/09/1979US4133396 Drilling and casing landing apparatus and method
12/1978
12/19/1978US4130170 Probe for use in geological surveys
12/19/1978CA1044693A1 Expandable raise bit
12/19/1978CA1044692A1 Land erosion protection on a rock cutter
12/19/1978CA1044691A1 Drill string stabilizer
12/12/1978US4129392 Rolling cutter arrangement
12/12/1978CA1044220A1 Stabilizer with replaceable sub-assemblies
12/05/1978US4128136 Drill bit
12/05/1978CA1043768A1 Expandable and contractible rotary well drilling bit
11/1978
11/28/1978US4127043 Rock bit with welded bearing pins
11/28/1978CA1043327A1 Drill bit with seal ring compensator
11/21/1978US4126195 Replaceable wear pad for a rock bit cutter yoke
11/21/1978US4126194 Rock bit with extended pickup tube
11/21/1978CA1042871A1 Cantilevered roller separator for rock bit bearing
11/21/1978CA1042869A1 Sintered alloy powder bearing element
10/1978
10/31/1978US4122905 Hand auger
10/31/1978CA1041476A1 Roller cutter drill bit
10/10/1978US4119160 Method and apparatus for water jet drilling of rock
10/10/1978US4119151 Casing slotter
10/10/1978CA1040096A1 Wellpoint jetting head
10/03/1978CA1039706A1 Roller separator for bit bearings
09/1978
09/26/1978US4116289 Rotary bit with ridges
09/26/1978CA1039266A1 Drill bit
09/19/1978US4114705 Rock drilling tool having pulsed jets
09/19/1978US4114322 Abrasive member
09/19/1978CA1038855A1 Cutter elements
09/19/1978CA1038854A1 Earth auger drill
09/12/1978US4113037 Rock drill
09/05/1978US4111270 Drilling assembly
08/1978
08/29/1978US4110084 Composite of bonded cubic boron nitride crystals on a silicon carbide substrate
08/29/1978US4109974 Plain and thrust bearing device
08/29/1978US4109737 Polycrystalline layer of self bonded diamond
08/29/1978CA1037253A1 Impact or demolition tool
08/22/1978US4108692 Rock bit roller cutter and method therefor
08/22/1978US4108260 Rock bit with specially shaped inserts
08/22/1978US4108259 Raise drill with removable stem
08/22/1978US4107800 Combination drilling and wrenching tool
08/15/1978US4106578 Percussion drill bit
08/15/1978US4106577 Hydromechanical drilling device
08/08/1978US4105263 Journal and pilot bearings with alternating surface areas of wear resistant and anti-galling materials
08/08/1978US4105083 Large diameter drill bit
07/1978
07/25/1978US4102552 Tandem eccentric roller stabilizer for earth boring apparatus
07/25/1978US4102419 Rolling cutter drill bit with annular seal rings
07/25/1978US4102416 Stabilized conical boring tool
07/25/1978US4102415 Drilling device
07/18/1978US4101238 Hole saw with particle-aspirating accessory for hand drill
07/18/1978US4100979 Pneumatic percussion boring device
07/11/1978US4099585 Roof drilling system
07/04/1978US4098448 Method and apparatus for manufacturing rotary drill bits
07/04/1978US4098363 Diamond drilling bit for soft and medium hard formations
07/04/1978US4098362 Rotary drill bit and method for making same
07/04/1978US4098361 Drilling head connection for use in a reverse circulation system
07/04/1978US4098358 Drill bit with hard-faced bearing surfaces
07/04/1978US4098352 Percussion bit with bypass channel therein
07/04/1978US4098150 Cone locking system for a rotary rock bit
06/1978
06/27/1978US4096917 Earth drilling knobby bit
05/1978
05/30/1978US4092054 Seal arrangement for rolling cutter
05/30/1978US4091988 Centrifugal trap for solid particles
05/30/1978US4091884 Rotary air percussion bit
05/30/1978US4091883 Underreaming tool with overriding extended arm retainer
05/30/1978US4091882 Drilling tool
05/30/1978US4091692 Bit holder
05/16/1978US4089382 Cutter mounting for a large hole earth boring bit
05/02/1978US4086973 Asymmetric insert for inner row of an earth boring cutter
04/1978
04/25/1978US4085809 Reconditionable drill bit assembly
04/18/1978US4084649 Rock bit
04/11/1978US4083417 Jetting apparatus
04/11/1978US4083416 Collapsible cutterhead for drilling upward
04/11/1978US4083415 Mining bit with replaceable work engaging member
04/11/1978US4083405 Well drilling method and apparatus therefor
04/04/1978US4082373 Tandem roller stabilizer for earth boring apparatus
04/04/1978US4082015 Removable drill bit nozzle
03/1978
03/28/1978US4081203 Drill string stabilizer
03/28/1978US4081042 Stabilizer and rotary expansible drill bit apparatus
03/28/1978US4080708 Method of repairing a dredge cutterhead
03/21/1978US4080091 Drill bit
03/21/1978US4080010 Tandem roller stabilizer for earth boring apparatus
03/14/1978US4078622 Road surface recessing device
03/14/1978US4078621 Drilling head
03/07/1978US4077734 Insert for mining tools and the like
03/07/1978US4077482 Three cone rock bit
02/1978
02/28/1978US4076087 Hole reamer
02/21/1978US4074922 Drill bit
02/21/1978US4074780 Earth auger
02/21/1978US4074778 Square hole drill
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