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)
11/2005
11/17/2005US20050252691 Drill bit having increased resistance to fatigue cracking and method of producing same
11/16/2005CN2740759Y Deep-hole rimer tool and deep hole for mounting and fixing of building workpiece
11/16/2005CN2740758Y Random integrated automatic water supplying system of engineering drilling machine
11/15/2005CA2487158C Hydraulic underreamer and sections for use therein
11/15/2005CA2408672C Wellbore liner system
11/15/2005CA2321650C A mill and a method for milling
11/15/2005CA2305235C Apparatus for directional drilling
11/10/2005WO2005106183A1 Earth-boring bits
11/10/2005US20050247492 Cutter having shaped working surface with varying edge chamber
11/10/2005US20050247491 Earth-boring bits
11/10/2005US20050247486 Modified cutters
11/10/2005CA2564082A1 Earth-boring bits
11/09/2005EP1592861A1 Cutting element
11/09/2005CN2739341Y Special drill rod for medium-sized drilling machine
11/09/2005CN2739340Y Rock-drilling cone connecting drill rod tip
11/09/2005CN1694788A Brazed diamond tools and methods for making the same
11/08/2005US6962218 Cutting elements with improved cutting element interface design and bits incorporating the same
11/08/2005US6962217 Rotary drill bit compensating for changes in hardness of geological formations
11/08/2005US6962216 Wedge activated underreamer
11/08/2005US6962214 Rotary seal for directional drilling tools
11/06/2005CA2506471A1 Thermally stable diamond bonded materials and compacts
11/03/2005WO2005103435A1 Enlarging and stabilising tool for a borehole and method for the use thereof
11/03/2005US20050241861 Cutting element with improved cutter to blade transition
11/03/2005US20050241858 Apparatus and method for drilling and reaming a borehole
11/03/2005US20050241856 Underreaming and stabilizing tool and method for its use
11/03/2005DE19537900B4 Drehbohrer Rotary drill
11/02/2005EP1590311A2 Diamond tool inserts pre-fixed with braze alloys and methods to manufacture thereof
11/02/2005EP1373675B1 Method for drilling and drilling apparatus
11/01/2005US6959775 Drill bit
11/01/2005US6959774 Drilling apparatus
11/01/2005CA2355815C Sealed bearing roller cone bit having anti-plugging device
11/01/2005CA2349283C Cutting element geometry for roller cone drill bit
11/01/2005CA2343282C Centered-leg roller cone drill bit
11/01/2005CA2278932C Tool for making an opening in a tubular in a wellbore
11/01/2005CA2260370C Thermal fatigue and shock-resistant material for earth-boring bits
10/2005
10/27/2005WO2005080742B1 Casing and liner drilling bits, cutting elements therefor, and methods of use
10/27/2005US20050236187 Drilling with casing
10/27/2005US20050236184 Method and apparatus and program storage device adapted for automatic drill bit selection based on earth properties and wellbore geometry
10/26/2005EP1589187A1 Bedrock drilling and excavating apparatus
10/26/2005EP1588017A1 Attachment means for drilling equipment
10/26/2005EP1588016A1 Wellstring assembly
10/26/2005CN1688786A Rotary mine drilling bit for making blast holes
10/26/2005CN1688785A Device for advancing drillings in the ground
10/25/2005CA2487182C Hydraulic underreamer and sections for use therein
10/25/2005CA2349400C Cutting structure for roller cone drill bits
10/25/2005CA2245952C Method of making a drill blank
10/20/2005WO2005098194A1 Device for a drilling tool
10/20/2005US20050230156 Thermally-stable polycrystalline diamond materials and compacts
10/20/2005US20050230155 Molten braze-coated superabrasive particles and associated methods
10/20/2005US20050230150 Coated diamonds for use in impregnated diamond bits
10/20/2005DE202005012724U1 Drop hammer drilling device, especially for overlap drilling, has overlap tube connected to drilling crown and casing tube between hammer and overlap tube that is preferably closed at bottom
10/20/2005DE202005012722U1 Hammer-drilling arrangement for drilling purposes comprises a hammer-drill head, a flushing medium supply unit, a drill pipe with a conveying channel for the drillings and an overlaying pipe connected to a drilling crown
10/19/2005EP1585884A1 Bit assembly
10/19/2005CN1684801A Molten braze coated superabrasive particles and associated methods
10/19/2005CN1683743A Multiple head screw drilling and milling machine
10/18/2005US6955234 Auger bit
10/18/2005US6955233 a hardface carbide coating applied to the shirttail portion by a high pressure/high velocity oxygen fuel torch; wear resistance
10/18/2005CA2487169C Hydraulic underreamer and sections for use therein
10/18/2005CA2344626C Method for applying hardfacing to a substrate and its application to construction of milled tooth drill bits
10/13/2005WO2005094166A2 A ball-activated tool for use in a drill string
10/13/2005DE102005011120A1 Drill has shaft with flutes and tapered tip section with variably spaced cutting teeth
10/12/2005CN2732977Y Near-bit local depression drilling tool
10/12/2005CN2732976Y Downhole hydraulic pumping pressure-reducing drilling tool
10/12/2005CN2732975Y Moving-in depth control PDC bit for directional well
10/12/2005CN1682010A Method and composition for reducing wear in a cutting head of a tunnel boring machine
10/11/2005US6953096 Expandable bit with secondary release device
10/11/2005CA2300834C Cutting insert and milling tool for use in a wellbore
10/11/2005CA2289389C Inserts for earth-boring bits
10/11/2005CA2154285C Improved rotary roller reamer
10/06/2005WO2002064939A8 Reamer having toroidal cutter body and method of use
10/06/2005US20050217899 Cutting structure based hydraulics
10/06/2005DE10344353B4 Bohrvorrichtung und Verfahren zum Verdrängungsbohren im Boden Drilling apparatus and method for displacement drilling in the ground
10/05/2005EP1581722A1 Cutting ring for disk rolls pertaining to partial and/or full cutting machines
10/05/2005EP1581662A1 Composite material
10/05/2005CN1221725C Twist-drill for rock
10/04/2005US6951578 Polycrystalline diamond materials formed from coarse-sized diamond grains
10/04/2005US6951258 Hollow auger head assembly
10/01/2005CA2503430A1 Cutting element with improved cutter to blade transition
09/2005
09/29/2005WO2005090876A1 Blade assembly especially for an ice auger or like
09/29/2005WO2005090749A1 Method and apparatus and program storage device adapted for automatic drill bit selection based on earth properties
09/29/2005US20050211475 Earth-boring bits
09/29/2005US20050211474 Gage surface scraper
09/29/2005US20050211470 Bottom hole assembly
09/29/2005CA2554294A1 Blade assembly especially for an ice auger or like
09/28/2005EP1580397A1 Drill bit
09/28/2005EP1580323A1 Auger and method of installing piles in a ground by means of said auger
09/28/2005EP1579104A1 Bit assembly for a hammering drill
09/28/2005EP1579103A1 Composite tool insert
09/28/2005CN2729292Y Bit for pile drilling machine
09/27/2005US6948403 Bowed crests for milled tooth bits
09/27/2005CA2502165A1 Bottom hole assembly
09/22/2005US20050205306 Drill bit
09/22/2005US20050205305 Under reamer
09/21/2005EP1283935B1 Rock drill
09/21/2005EP1261798B1 Rock drill
09/21/2005CN2727379Y Low resistance diamond bit for stratigraphic drilling
09/21/2005CN2727378Y Screw pile forming bit
09/21/2005CN2727377Y Roller bit with reinforced palm tip structure
09/20/2005US6945338 Drilling bit assembly and apparatus
09/15/2005WO2005085582A1 Single pass drilling apparatus, use a one -piece drill bit, method and rock bolt for single pass rock bolting.
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