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)
11/2008
11/20/2008WO2008141138A2 Cutting head bearing arrangement for blast hole drilling machine
11/20/2008WO2008112262B1 Method of forming pockets for receiving drill bit cutting elements
11/20/2008WO2008085616A3 Fiber-containing diamond-impregnated cutting tools
11/20/2008WO2008085381A3 Methods and systems for compaction of powders in forming earth-boring tools
11/20/2008WO2008006005A3 Injection system and method
11/20/2008US20080284236 Roller Assembly
11/20/2008US20080283305 Method of Repairing Diamond Rock Bit
11/20/2008US20080283304 Steel tooth drill bit with improved tooth breakage resistance
11/20/2008US20080282619 Cutting element
11/20/2008US20080282618 Impregnated material with variable erosion properties for rock drilling and the method to manufacture
11/19/2008CN201152149Y Polycrystalline diamond compact bit possessing independent longitudinal back-up cutting structure
11/19/2008CN201152148Y Soil horizon hole external lifting and pressing type reamer bit
11/19/2008CN201152147Y Multilevel tower type engineering drill head
11/19/2008CN201152146Y Floating shaft bushing type roller bit
11/19/2008CN101310090A Earth boring drill bits with casing component drill out capability, cutting elements for same, and methods of use
11/18/2008US7451838 High energy cutting elements and bits incorporating the same
11/18/2008US7451837 Advanced expandable reaming tool
11/18/2008US7451836 Advanced expandable reaming tool
11/18/2008US7451834 Impact enhancing apparatus and method
11/18/2008CA2594037A1 Impregnated material with variable erosion properties for rock drilling and the method to manufacture
11/13/2008WO2008062369A3 Material containing diamond and an intermetallic compound
11/13/2008US20080277167 Dry drilling and core acquisition system
11/12/2008EP1989391A2 Backup cutting element insert for rotary drill bits
11/12/2008CN201148840Y Pointed tooth compact bit
11/12/2008CN201148839Y Repeatedly-usable prospecting bore bit
11/12/2008CN201148838Y Drill head for branch wellbore reentrance
11/12/2008CN101302923A Double movable double-tube boring tool for loosing broken formation to take out core (sample)
11/06/2008WO2008097843A3 Rotary drill bit steerable system and method
11/06/2008WO2008073309B1 Rotary drag bits having a pilot cutter configuration and method to pre-fracture subterranean formations therewith
11/06/2008US20080271926 Mounting system for a fiber optic cable at a downhole tool
11/05/2008CN201144643Y Coreless boring tool with gear
11/05/2008CN201144642Y Blade PDC drill bit
11/05/2008CN201144641Y Active radius retention pad structure of diamond drill
11/05/2008CN101300400A Self actuating underreamer
11/04/2008US7445063 Rock drill bit assembly
11/04/2008US7445062 Grease filling arrangement in a cutter for a boring head
11/04/2008US7445058 Nozzle unit and method for excavating a hole in an object
11/04/2008US7445057 Method and apparatus for introducing elongate members into the ground
11/03/2008CA2630223A1 Acid tunneling bottom hole assembly
10/2008
10/30/2008WO2008131095A2 Elastomer material for high temperature roller cone bits
10/30/2008WO2008100194A3 A drill bit and a single drilling apparatus
10/30/2008WO2008086284A3 Intermetallic aluminide polycrystalline diamond compact (pdc) cutting elements
10/30/2008WO2008070052B1 Expandable reamers for earth boring applications
10/30/2008US20080264697 Retention for an Insert
10/30/2008US20080264696 Auto adaptable cutting structure
10/30/2008US20080264695 Hybrid Drill Bit and Method of Drilling
10/29/2008EP1985794A2 Hard metal plate for rock drill and rock drill
10/29/2008CN201141282Y Near-horizontal jet grouting and jet drilling integrated construction drilling tool
10/29/2008CN201138970Y Fish tail wimble for park and garden ground auger
10/28/2008US7441612 PDC drill bit using optimized side rake angle
10/28/2008US7441611 Pneumatic rock drill
10/28/2008CA2531930C Formation cutting method and system
10/23/2008WO2008128184A1 Circumvolve cutters for drill bit
10/23/2008WO2008125581A1 Drill bit assembly and method of performing an operation in a wellbore
10/23/2008WO2008125108A1 Release device
10/23/2008WO2008124886A1 Drill string hard overlay application system
10/23/2008WO2008106022B1 Method and apparatus for collecting drill bit performance data
10/23/2008WO2008092130B1 Rotary drag bit and methods therefor
10/23/2008WO2008092113B1 Rotary drag bit and methods therefor
10/23/2008WO2008076908A3 Core drill bit with extended matrix height
10/23/2008US20080257610 Elastomer Material for High Temperature Roller Cone Bits
10/23/2008US20080257608 Reaming and stabilization tool and method for its use in a borehole
10/23/2008CA2682290A1 Drill bit assembly and method of performing an operation in a wellbore
10/23/2008CA2682040A1 Release device
10/22/2008CN201137461Y Frozen earth drill
10/22/2008CN101292074A Diameter expanding groove cutting device and expanding/contracting mechanism tool
10/22/2008CN101292062A Superabrasive particle synthesis with controlled placement of crystalline seeds
10/22/2008CN101289924A Hollow drill
10/16/2008WO2008124780A1 Countersink roof bit drill and method for using the same
10/16/2008WO2008124636A1 Apparatus and methods of milling a restricted casing shoe
10/16/2008WO2008124572A1 Hybrid drill bit and method of drilling
10/16/2008WO2008124469A1 System, method, and apparatus for contoured thrust surfaces between thrust washer and head for roller cone drill bit
10/16/2008WO2008104179A3 Drilling head for reborinq a stuck valve
10/16/2008WO2008073310B1 Methods of attaching a shank to a body of an earth boring drilling tool, and tools formed by such methods
10/16/2008WO2008070051B1 Restriction element trap for use with and actuation element of a downhole apparatus and method of use
10/16/2008US20080251297 Passive and active up-drill features on fixed cutter earth-boring tools and related methods
10/16/2008US20080251294 Self Actuating Underreamer
10/16/2008CA2682604A1 System, method, and apparatus for contoured thrust surfaces between thrust washer and head for roller cone drill bit
10/16/2008CA2682316A1 Apparatus and methods of milling a restricted casing shoe
10/15/2008CN201133217Y Diamond drill bit
10/15/2008CN201133216Y Combined machining structure diamond drill bit
10/15/2008CN101285372A Hollow drill bit and cutting element and its production method
10/15/2008CN101285371A Diamond positioning and arrangement impregnated rock bit and fabrication technology thereof
10/14/2008US7434635 Tin seat for rock drill insert
10/14/2008US7434632 Roller cone drill bits with enhanced drilling stability and extended life of associated bearings and seals
10/14/2008CA2387568C Drill bit with eccentric body
10/09/2008WO2008121219A1 Shrink-fit sleeve assembly for a drill bit, including nozzle assembly and method therefor
10/09/2008WO2008120937A1 Sintered body for excavating tool
10/09/2008WO2008091793A3 Casting of tungsten carbide matrix bit heads and heating bit head portions with microwave radiation
10/09/2008US20080248305 Superabrasive Particle Synthesis with Controlled Placement of Crystalline Seeds
10/09/2008US20080245577 System, method, and apparatus for contoured thrust surfaces between thrust washer and head for roller cone drill bit
10/09/2008US20080245576 Cutting elements with increased toughness and thermal fatigue resistance for drilling applications
10/09/2008US20080245568 System and Method for Drilling a Borehole
10/09/2008US20080245220 Percussion Mechanism and at Least Percussively-Operated Hand Machine Tool With a Percussion Mechanism
10/08/2008EP1977073A1 Steerable drilling system
10/08/2008CN201129611Y Roller cone drilling machine drill head lubricating device
10/08/2008CN201129327Y Proportional servo hydraulic valve
10/08/2008CN201129143Y Helical chisel teeth
10/08/2008CN201129142Y Step combined drill for indoor pipeline engineering
10/08/2008CN101283158A Method and rock drilling rig for hole drilling
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