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)
09/2010
09/08/2010CN201574688U Floating air distribution two-way impact type nonsmooth auger drill head
09/08/2010CN1791732B Drill bit and drilling system with underreamer- and stabilization-section
09/08/2010CN101824968A Novel brazed impregnated diamond bit
09/08/2010CN101824967A Novel high adhesion strength diamond engineering thin wall drilling bit and manufacturing method
09/02/2010WO2010099512A1 Drill bit for earth boring
09/02/2010WO2010099075A1 Drill bit with adjustable cutters
09/02/2010WO2010099073A1 Methods and apparatuses for estimating drill bit condition
09/02/2010WO2010098978A1 Polycrystalline diamond compact including a cemented tungsten carbide substrate that is substantially free of tungsten carbide grains exhibiting abnormal grain growth and applications therefor
09/02/2010WO2010098557A2 Hydraulic breaker with automatic grease supply
09/02/2010WO2010056641A4 Pilot reamer with composite framework
09/02/2010US20100219001 Rolling cutter
09/02/2010US20100219000 Impregnation bit with improved cutting structure and blade geometry
09/02/2010US20100218999 Drill bit for earth boring
09/02/2010US20100218997 Cutting device with multiple cutting structures
09/02/2010CA2773331A1 Drill bit for earth boring
09/01/2010EP2222933A2 Roller cone bit bearing with elastomeric seal having self break-in property
09/01/2010EP2222932A1 Hybrid drill bit and design method
09/01/2010EP1875032B1 A drilling tool
09/01/2010CN201568054U Four-axle linkage type drilling tool for coal drilling machine
09/01/2010CN201567991U Hexagon spiral pilot milling tap
09/01/2010CN201567963U Diamond drill bit with wide gauge structure
09/01/2010CN201567962U Well deviation protective PDC drill
09/01/2010CN101818622A Diamond drill bit and manufacturing method thereof
09/01/2010CN101818621A Hollow drill bit
08/2010
08/31/2010US7785012 Bearing arrangement
08/31/2010US7784563 Method, drilling machine, drill bit and bottom hole assembly for drilling by electrical discharge by electrical discharge pulses
08/26/2010WO2010096629A2 Stabilizer assemblies with bearing pad locking structures and tools incorporating same
08/26/2010WO2010096538A1 Matrix body fixed cutter bits
08/26/2010WO2010078182A3 Engineered bearing surface for rock drilling bit
08/26/2010WO2010075154A3 Methods of forming bodies for earth boring drilling tools comprising molding and sintering techniques, and bodies for earth-boring tools formed using such methods
08/26/2010WO2010075153A3 Cutting removal system for pdc drill bits
08/26/2010WO2007022185A3 Low projection inserts for rock bits
08/26/2010US20100212971 Polycrystalline Diamond Compact Including A Cemented Tungsten Carbide Substrate That Is Substantially Free Of Tungsten Carbide Grains Exhibiting Abnormal Grain Growth And Applications Therefor
08/26/2010US20100212969 Stabilizer assemblies with bearing pad locking structures and tools incorporating same
08/26/2010US20100212964 Drill Bit With Adjustable Cutters
08/26/2010US20100212961 Methods and apparatuses for estimating drill bit condition
08/25/2010EP2220332A2 Methods and apparatuses for forming cutting elements having a chamfered edge for earth-boring tools
08/25/2010EP2220331A2 Impregnated rotary drag bit and related methods
08/25/2010EP2220330A1 Drill bits and tools for subterranean drilling
08/25/2010EP1792052B1 Integrated magnetic ranging tool
08/25/2010CN201560715U Suspension digging machine rock drill bit
08/25/2010CN201560714U PDC aiguille suitable for drilling soft horizon
08/25/2010CN201560713U Self-expanding spiral drill bit
08/25/2010CN201560712U Rock drill bit cooling system
08/25/2010CN1784533B Roller assembly
08/25/2010CN101812973A Efficient high-strength composite drill bit
08/25/2010CN101812972A Micro-coring PDC bit
08/25/2010CN101812971A Combined bit
08/25/2010CN101812970A High pressure resistant and impact resistant roller bit with high rotating speed
08/24/2010US7779938 Swivel for use in installing large diameter casing
08/24/2010US7779937 Steel tooth bit with scooped teeth profile
08/24/2010US7779936 Staggered compact row on same land
08/19/2010WO2010093580A2 Methods, systems, and devices for manipulating cutting elements for earth boring drill bits and tools
08/19/2010WO2010093340A2 Sealed bearing for a drilling bit rolling cutter
08/19/2010WO2010065808A3 Method of monitoring wear of rock bit cutters
08/19/2010WO2010065737A3 Trocar-tipped drill bit
08/19/2010WO2010054353A3 Bit based formation evaluation and drill bit and drill string analysis using an acoustic sensor
08/19/2010WO2010036834A4 Drill bit with adjustable steering pads
08/19/2010US20100211362 Methods for modeling, displaying, designing, and optimizing fixed cutter bits
08/19/2010US20100206641 Chamfered Pointed Enhanced Diamond Insert
08/19/2010US20100206640 Matrix Body Fixed Cutter Bits
08/19/2010US20100206639 Infiltrated Carbide Matrix Bodies Using Metallic Flakes
08/19/2010US20100206638 Hole opener assembly and a cone arm forming a part thereof
08/19/2010US20100206637 Cutting Unit for a Tunneling Apparatus
08/19/2010US20100206636 Backreamer for a Tunneling Apparatus
08/19/2010US20100206635 Tunneling Apparatus Including Vacuum and Method of Use
08/19/2010US20100206634 Reamer and Methods for Directional Drilling
08/18/2010CN201554375U Guide horizontal jet grouting construction drill bit
08/18/2010CN201554374U Self-sharpening cross drill
08/18/2010CN201554373U Small-caliber dual-wing hole-expanding drill bit for well
08/18/2010CN201554370U Four-in-one drilling tool structure with three centering devices
08/18/2010CN1777736B Well string assembly
08/18/2010CN1625640B Composite abrasive compact
08/18/2010CN101809247A Rotary cutter for tunnel boring machine
08/18/2010CN101806196A Compound rotary drilling rig drilling mechanism
08/18/2010CN101806195A Tricone bit used for high-rotating speed well drilling
08/18/2010CN101806194A Vacuum three-wing drill for wave pressure drilling machine
08/17/2010US7778777 Methods and systems for designing and/or selecting drilling equipment using predictions of rotary drill bit walk
08/17/2010US7775304 Apparatus and method for driving casing or conductor pipe
08/17/2010US7775303 Device for a drilling tool
08/17/2010US7775302 Casing shoe and retrievable bit assembly
08/17/2010US7775300 Earth drilling device
08/17/2010US7775287 Methods of attaching a shank to a body of an earth-boring drilling tool, and tools formed by such methods
08/17/2010CA2585915C Dual-seal drill bit pressure communication system
08/17/2010CA2569451C Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions
08/12/2010US20100200305 Cutting Element
08/12/2010US20100200304 Abrasive tip for abrasive tool and method for forming and replacing thereof
08/12/2010US20100200303 Bit assembly
08/12/2010US20100200302 Digging tool, digging bit, and device
08/12/2010US20100200298 Downhole tool
08/12/2010US20100199573 Ultrahard diamond composites
08/11/2010CN201546626U Inner concave conical composite slice for PDC drill
08/11/2010CN201546625U PDC drill bit for avoiding negative cutting angles of balling
08/11/2010CN201546624U Anti-scour special drill bit
08/11/2010CN201546623U Bit for terrene surrounding rock down-hole drill
08/11/2010CN201546622U Gas drill hammer for drilling oil gas well
08/11/2010CN201546621U Lubricating oil supplying device of compressed air type roller bit bearing
08/11/2010CN201546620U Roller bit bearing seal structure
08/11/2010CN201546615U Telescopic drilling tool of mixing pile machine
08/11/2010CN101798905A Multispiral cutter-type drill bit for long screw pile machine
1 ... 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 ... 195