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)
12/2007
12/27/2007WO2007149939A2 Cuttings removal wipers for cutter assemblies and method
12/27/2007WO2007149266A1 Superabrasive materials and methods of manufacture
12/27/2007WO2007148060A1 Pcd cutters with enhanced working surfaces adjacent a cavity
12/27/2007WO2007147257A1 Stabilizer for drill strings
12/27/2007WO2007120059B1 Cutting, drilling or grinding apparatus and method
12/27/2007WO2006096495A3 Modular kerfing drill bit
12/27/2007US20070295267 High pressure superabrasive particle synthesis
12/27/2007CA2656913A1 Pdc cutters with enhanced working surfaces adjacent a cavity
12/26/2007CN200996271Y Diamond bore-bit water tap
12/26/2007CN101094741A Cutting inserts with cutting end anchor portion
12/26/2007CN100357481C Method of making a tool component
12/25/2007US7311159 PCD face seal for earth-boring bit
12/21/2007WO2007146276A1 Surface textures for earth boring bits
12/21/2007WO2007146168A1 Rotary rock bit with hardfacing to reduce cone erosion
12/21/2007WO2007145662A1 Multi-sectional percussive drill bit assembly
12/21/2007WO2007144719A2 Expandable downhole tool
12/21/2007WO2007143773A1 Microtunnelling system and apparatus
12/21/2007WO2007120786B1 Methods for designing and fabricating earth-boring rotary drill bits having predictable walk characteristics and drill bits configured to exhibit predicted walk characteristics
12/21/2007WO2007110770A3 Polycrystalline abrasive compacts
12/21/2007WO2007103417A3 Connection between a lateral and main pipe and method for making same remotely
12/21/2007CA2651949A1 Expandable downhole tool
12/21/2007CA2649801A1 Microtunnelling system and apparatus
12/20/2007US20070289782 Reaming tool suitable for running on casing or liner and method of reaming
12/20/2007US20070289780 Cuttings removal wipers for cutter assemblies and method
12/19/2007CN200992952Y Nozzle for roller cone bit
12/18/2007US7308957 Fixed-head bit with stabilizing features
12/18/2007US7308956 Method of securing a rotary cutter to a body of a down hole tool and a rotary cutter assembly
12/18/2007US7308946 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device
12/18/2007US7308940 Flexible wellbore broach
12/18/2007US7308937 Expandable reamer apparatus for enlarging boreholes while drilling and methods of use
12/18/2007CA2532929C Window reaming and coring apparatus and method of use
12/18/2007CA2241704C Drill bit with large inserts
12/13/2007WO2007142672A1 Multi-sectional percussive drill bit assembly
12/13/2007WO2007141550A1 Resonance enhanced drilling: method and apparatus
12/13/2007US20070284153 Rotary drag bit including a central region having a plurality of cutting structures
12/13/2007US20070284152 Thermally stable diamond polycrystalline diamond constructions
12/13/2007US20070284151 Rotary rock bit with hardfacing to reduce cone erosion
12/13/2007US20070284150 Surface Textures for Earth Boring Bits
12/13/2007CA2654531A1 Resonance enhanced drilling: method and apparatus
12/12/2007EP1865144A1 Hard material head and rotary percussion drill
12/12/2007EP1454031B1 An improved transmission sleeve
12/12/2007CN200989166Y Diamond/hard alloy composite inserts
12/12/2007CN200989165Y Geophysical prospecting auger drill bit with scraping rock-breaking teeth
12/12/2007CN200989162Y Hydraulic pulse cavitation jet-flow well drilling device and drill bit
12/12/2007CN101086199A Surface set natural diamond bit and production process
12/12/2007CN101086198A Method of creating a borehole in an earth formation
12/12/2007CN101086197A Bearing metal sealing structure for rock bit
12/12/2007CN100354498C Air DTH hammer drilling equipment for core and follow-down drilling
12/11/2007US7306061 Mud diverter for earth-boring bit
12/11/2007CA2453980C Method of forming a tubing lined borehole
12/06/2007WO2007140010A2 Cutting structure for earth-boring bit to reduce tracking
12/06/2007WO2007005717A3 Twist bit for drilling mortar and for optimizing dissipation of heat and dust created by the drilling
12/06/2007US20070278017 Rolling cutter
12/06/2007US20070278016 Hard material head and rotary percussion drill bit
12/06/2007US20070278015 Cutting Element Having Asymmetrical Crest For Roller Cone Drill Bit
12/06/2007US20070278014 Drill bit with plural set and single set blade configuration
12/06/2007US20070278010 Device for channeling solids and fluids within a reverse circulation drill
12/05/2007EP1861577A2 Rotary drill bit shank, rotary drill bits so equipped, and methods of manufacture
12/05/2007CN200985746Y Hard-metal insert
12/05/2007CN100353020C Aiguille blade assembly, drill pipe containing same and aiguille blade for self-drilling pole or anchor shaft
12/04/2007US7303030 Barrier coated granules for improved hardfacing material
11/2007
11/30/2007CA2744144A1 Rolling cutter
11/30/2007CA2588504A1 Drill bit with plural set and single set blade configuration
11/29/2007WO2007136568A2 Core drill assembly with adjustable total flow area and restricted flow between outer and inner barrel assemblies
11/29/2007US20070274788 Single Pass Drilling Apparatus, Use of a One-Piece Drill Bit, Method and Rock Bolt for Single Pass Rock Bolting
11/29/2007US20070272448 Randomly-oriented composite constructions
11/29/2007US20070272447 Cutting Structure for Earth-Boring Bit to Reduce Tracking
11/29/2007US20070272446 Drill bit with application specific side cutting efficiencies
11/29/2007US20070272445 Drill bit with assymetric gage pad configuration
11/29/2007CA2652563A1 Core drill assembly with adjustable total flow area and restricted flow between outer and inner barrel assemblies
11/28/2007EP1860274A1 Drill bit
11/28/2007EP1859121A1 Bit leg and cone hardfacing for earth-boring bit
11/28/2007CN200982159Y Roller bit single-metal floating seal assembly
11/28/2007CN200982158Y Multiple prismatic tooth steel tooth bit
11/28/2007CN100351063C Brazed diamond tools and methods for making the same
11/27/2007US7302374 Method of designing a drill bit, and bits made using said method
11/27/2007US7299887 Roller bit with a journal pin offset from the central axis thereof
11/27/2007CA2447672C Lining and drilling a wellbore with an expandable bit
11/22/2007WO2005084334A3 Superabrasive particle synthesis with controlled placement of crystalline seeds
11/22/2007US20070269274 Rock Bolt
11/22/2007US20070267227 Drill bit with staged durability, stability and rop characteristics
11/22/2007US20070267226 Percussion drill bit and method of drilling a borehole
11/22/2007US20070267225 Auger loading apparatus and machine with same
11/22/2007DE4303590C5 Gesteinsbohrer Rock drill
11/22/2007DE19748987B4 Bohrwerkzeug insbesondere für drehschlagendes Bohren von vorzugsweise Gestein Drilling tool especially for rotating percussion drilling of preferably rock
11/21/2007EP1856368A1 Drill bit with stationary cutting structure
11/21/2007CN200978628Y Salvaging type casing drilling surface dedicated drill bit
11/21/2007CN200978627Y 金刚石切削齿 Diamond cutters
11/21/2007CN200978626Y Hydraulic extrusion diameter-changing drill jig
11/21/2007CN200978625Y Roller bit pressure balance and oil-storage compensation device
11/21/2007CN200978624Y Salvaging type casing drilling surface dedicated drill bit
11/21/2007CN200978623Y Drill-manipulable casing drilling surface dedicated drill bit
11/21/2007CN100349678C A cutting plate for a drill bit
11/20/2007US7296641 Rock drill bit having outer and inner rock-crushing buttons
11/20/2007US7296639 Wellstring assembly
11/20/2007US7296638 Orientation device for a core sample
11/15/2007WO2007130749A2 Drill bit assembly with a logging device
11/15/2007WO2007100857A3 Nozzle that produce angular momentum and methods for making and using same
11/15/2007WO2007041606A3 Hardfacing composition and article having hardfacing deposit
11/15/2007WO2002079604A3 Expandable downhole tool
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