E21B 10 - Drill bits - Patents Sitemap

Patents for E21B 10 - Drill bits (19,464)
12/2004
12/07/2004	US6827148 Downhole tool for use in a wellbore
12/05/2004	CA2466436A1 Bit body formed of multiple matrix materials and method for making the same
12/02/2004	WO2004104363A1 Drill bit, system, and method for drilling a borehole in an earth formation
12/02/2004	WO2004104362A1 Percussive drill bit, drilling system comprising such a drill bit and method of drilling a bore hole
12/02/2004	WO2004104361A1 Drill bit and system for drilling a borehole
12/02/2004	WO2004104360A2 Drill bit and drilling system with under -reamer- and stabilisation-section
12/02/2004	US20040243367 Methods for evaluating cutting arrangements for drill bits and their application to roller cone drill bit designs
12/02/2004	US20040238227 Superabrasive cutting element having an asperital cutting face and drill bit so equipped
12/02/2004	US20040238226 PCD face seal for earth-boring bit
12/02/2004	US20040238225 Rockbit with attachable device for improved cone cleaning
12/02/2004	US20040238224 Well drilling bit
12/02/2004	US20040238222 Directional borehole drilling system and method
12/02/2004	US20040238221 Steerable rotary drill bit assembly with pilot bit
12/02/2004	US20040238218 Injecting a fluid into a borehole ahead of the bit
12/02/2004	DE10328609B3 Wet-drilling tool for drilling a hole in the ground comprises a passage device having a tubular dome with an inlet opening above a collecting container and a connecting rod connection for a boring rod
12/02/2004	DE10297474T5 Verfahren und Vorrichtung zum Ausfräsen eines Abschnitts in Gegenrichtung Method and apparatus for cutting out a portion in the opposite direction
12/02/2004	CA2526249A1 Percussive drill bit, drilling system comprising such a drill bit and method of drilling a bore hole
12/01/2004	EP1117896B1 Hole opener with multisized, replaceable arms and cutters
12/01/2004	CN2660088Y Electric hydraulic bend hole drill and expanding bit for drilling bend hole
12/01/2004	CN2660087Y Return bit for geologic drilling
11/2004
11/30/2004	US6823952 Structure for polycrystalline diamond insert drill bit body
11/30/2004	US6823951 Arcuate-shaped inserts for drill bits
11/28/2004	CA2462754A1 Self-lubricating elastomeric seal with polarized graphite
11/27/2004	CA2468662A1 Methods for evaluating cutting arrangements for drill bits and their application to roller cone drill bit designs
11/25/2004	WO2004101947A2 Device for drilling a bore in the ground
11/25/2004	WO2004101943A2 Underreamer
11/25/2004	US20040236553 Three-dimensional tooth orientation for roller cone bits
11/25/2004	US20040234345 Method for making a trench wall in the ground, trench wall cutter and trench wall cutting device
11/25/2004	US20040231894 Rotary tools or bits
11/25/2004	DE10342817A1 Bohrer Drill
11/25/2004	DE10319800A1 Hollow crown for core-drilling machine, has pipe with cutting elements arranged at front side along the propulsion direction, and a central fluid supply with its outlet set within the sphere of activity of the cutting elements
11/24/2004	EP1117515B1 Diamond blade having segment type cutting tip for use in cutting, grinding or drilling apparatus
11/24/2004	EP1117514B1 Diamond blade having rim type cutting tip for use in grinding or cutting apparatus
11/24/2004	EP1095202B1 Abrasive body
11/24/2004	CN2658371Y Integral amplifier
11/23/2004	US6820704 Rock bit seal with extrusion prevention member
11/23/2004	CA2040071C Percussive rock cutting tool
11/18/2004	WO2004099555A1 Stabilising band for a roller assembly
11/18/2004	WO2004099550A2 Drilling aparatus
11/18/2004	US20040230413 Roller cone bit design using multi-objective optimization
11/18/2004	US20040226751 Drill shoe
11/18/2004	CA2524395A1 Drilling apparatus
11/18/2004	CA2523767A1 Stabilising band for a roller assembly
11/17/2004	EP1257723B1 Device for drilling, especially percussion or rotary percussion drilling, holes
11/17/2004	CN2656600Y Regular polygon hollow rock drill steel
11/17/2004	CN2656599Y Disk harrow teeth type gear wheel drill
11/16/2004	US6817429 Roof bit carbide blade
11/16/2004	US6817428 Drill bit
11/16/2004	CA2181562C Milling tool
11/11/2004	WO2004097163A1 Downhole tool having radially extendable members
11/11/2004	US20040222025 Fixed blade fixed cutter hole opener
11/11/2004	US20040222024 Apparatus and method for directional drilling of holes
11/11/2004	US20040222022 Concentric expandable reamer
11/11/2004	US20040222018 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
11/10/2004	EP1475510A1 Drill
11/10/2004	CN2654837Y Electric drill bit with cooling hole on tough side
11/09/2004	US6814167 Boring device and boring method
11/09/2004	US6814162 One cone bit with interchangeable cutting structures, a box-end connection, and integral sensory devices
11/04/2004	WO2004095036A2 Method and apparatus for vertical voltage potential mapping
11/04/2004	WO2004094783A1 Well string assembly
11/04/2004	WO2004094773A1 Drilling tool having an expandable bladder and method for using same
11/04/2004	WO2004094772A1 A rock drill bit assembly
11/04/2004	WO2004094767A2 Expanded liner system and method
11/04/2004	WO2004094734A2 Drill bit
11/04/2004	US20040216926 Drill bits with reduced exposure of cutters
11/04/2004	US20040216892 Drilling with casing latch
11/04/2004	CA2522572A1 A rock drill bit assembly
11/03/2004	CN2653113Y Hydraulic expansion type PDC hole expander
11/03/2004	CN2653112Y Hydraulic pulse jet nozzle of drill bit
11/03/2004	CN2653111Y High strength anti-wear multiple tri-cone rotary drill bit
11/03/2004	CN1543531A Injecting a fluid into a borehole ahead of the bit
11/03/2004	CN1542235A Strong-core deep injection stirring pile-making method and special drill bit therefor
11/03/2004	CN1174158C Roller bit with parallelly inlaid teeth
11/02/2004	US6810974 Quick release drill bit for down-hole drills
11/02/2004	US6810973 Steerable horizontal subterranean drill bit having offset cutting tooth paths
11/02/2004	US6810972 Steerable horizontal subterranean drill bit having a one bolt attachment system
11/02/2004	US6810971 Steerable horizontal subterranean drill bit
11/02/2004	CA2466212A1 Compositions having enhanced wear resistance
10/2004
10/28/2004	WO2004092531A2 Nutating single cone drill bit
10/28/2004	US20040211597 Drilling tool having an expandable bladder and method for using same
10/28/2004	US20040211596 Simulating the dynamic response of a drilling tool assembly and its application to drilling tool assembly design optimization and drilling performance optimization
10/28/2004	US20040211570 Expanded liner system and method
10/27/2004	EP1471187A1 Threading equipment
10/27/2004	EP1470315A1 Composite abrasive compact
10/27/2004	CN1540131A Integrated self water-feeding system combined with engineering drilling machine
10/27/2004	CN1540130A High strength antiwear drilling bit of multiple rollers
10/26/2004	US6808031 Drill bit having large diameter PDC cutters
10/21/2004	WO2004090277A1 Hole opener
10/21/2004	US20040206552 Polycrystaline diamond compact insert reaming tool
10/21/2004	US20040206549 Expandable underreamer/stabilizer
10/21/2004	US20040206547 Expandable drilling tool
10/20/2004	EP1272730B1 Drill bit
10/20/2004	CN2649284Y Thin board drilling bit
10/14/2004	WO2004088088A1 Underreamer
10/14/2004	WO2004025080A3 Method and composition for reducing wear in a cutting head of a tunnel boring machine
10/14/2004	US20040201381 Method and apparatus for vertical voltage potential mapping
10/14/2004	US20040200640 Nutating single cone drill bit
10/13/2004	CN1536171A Block-type steel pipe pile
10/12/2004	US6802380 Pressure relief system and methods of use and making
10/07/2004	WO2004085792A1 Drill bit assembly, drill rod including the drill bit assembly and drill tip for a self drilling rock or roof bolt

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