| Patents for E21B 10 - Drill bits (19,464) |
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| 03/25/2004 | WO2004025080A2 Method and composition for reducing wear in a cutting head of a tunnel boring machine |
| 03/25/2004 | WO2002077136A3 Improved concrete pile made of such a concrete and method for drilling a hole adapted for receiving the improved concrete pile in a weak ground |
| 03/25/2004 | CA2405261A1 Hole-opener for enlarging pilot hole |
| 03/24/2004 | EP1399640A1 Rock drilling tool, a ring drill bit and an adapter for percussive drilling |
| 03/24/2004 | EP1012436B1 Drilling tool for down-the-hole drilling, reamer means and body element for use in the tool |
| 03/24/2004 | CN2607435Y Roller bit with alarm sensor |
| 03/23/2004 | US6708786 Mounting attachment and bearing system for an industrial earth-boring cutter |
| 03/18/2004 | WO2004022904A1 Expandable bit |
| 03/18/2004 | US20040052597 Perforating drill |
| 03/18/2004 | US20040050926 Method and system for providing a decision support for users for selecting drilling and cutting elements for use in a construction material region |
| 03/17/2004 | EP1398456A2 Hydraulic optimization of drilling fluids in borehole drilling |
| 03/17/2004 | EP1398454A2 Drilling apparatus |
| 03/17/2004 | EP0995010B1 Core barrel |
| 03/17/2004 | CN2606756Y Self drilling type soft soil grouting ground tackle |
| 03/16/2004 | US6705415 Directional drilling apparatus |
| 03/16/2004 | US6705413 Drilling with casing |
| 03/16/2004 | CA2001178C Rotary drill bit for drilling through sticky formations |
| 03/11/2004 | WO2003080985A3 Stacked drill bit and toroidal reamer and method |
| 03/11/2004 | US20040045743 Cutting elements of gage row and first inner row of a drill bit |
| 03/11/2004 | US20040045742 Force-balanced roller-cone bits, systems, drilling methods, and design methods |
| 03/10/2004 | EP1395730A1 Expandable drilling tool |
| 03/10/2004 | CN2606169Y Homocentric drill with separate drive |
| 03/10/2004 | CN2606133Y Rotary boring mould apparatus |
| 03/09/2004 | US6702204 Cavitating jet |
| 03/09/2004 | US6702045 Drilling apparatus |
| 03/06/2004 | CA2401917A1 Expandible bit |
| 03/04/2004 | US20040040752 Method of producing downhole drill bits with integral carbide studs |
| 03/04/2004 | US20040040751 Directional drilling apparatus |
| 03/04/2004 | US20040040750 Rotary cone bit with functionally-engineered composite inserts |
| 03/04/2004 | US20040040748 Steerable soil displacement hammer |
| 03/04/2004 | US20040040747 Self relieving seal |
| 03/03/2004 | EP1394351A2 Apparatus for producing drilled piles |
| 03/03/2004 | EP1392952A1 Apparatus and method for rotary bored drilling |
| 03/03/2004 | EP1272711B1 Method and device for the production of back-cut cavities |
| 03/03/2004 | CN2605376Y Dual-sliding bearing bit wich clasp |
| 03/03/2004 | CN2605375Y Tri-cone rotary drill bit with gear wheel anti-dropping early warning device |
| 03/03/2004 | CN1478990A Diamond-hard alloy composite type coring bit and its manufacturing process |
| 03/02/2004 | US6698538 Drill bit having adjustable total flow area |
| 03/02/2004 | US6698537 Bit retention system |
| 03/02/2004 | US6698536 Roller cone drill bit having lubrication contamination detector and lubrication positive pressure maintenance system |
| 03/02/2004 | US6698098 Cone erosion protection for roller cone drill bits |
| 02/29/2004 | CA2438637A1 Preformed tooth for tooth bit |
| 02/26/2004 | US20040035609 Mechanically shaped hardfacing cutting/wear structures |
| 02/24/2004 | US6696137 Woven and packed composite constructions |
| 02/24/2004 | US6695080 Reaming apparatus and method with enhanced structural protection |
| 02/24/2004 | US6695079 Dual-seal drill bit pressure communication system |
| 02/24/2004 | US6695074 Method and apparatus for enlarging well bores |
| 02/24/2004 | US6695073 Rock drill bits, methods, and systems with transition-optimized torque distribution |
| 02/21/2004 | CA2437519A1 Hydraulic optimization of drilling fluids in borehole drilling |
| 02/19/2004 | US20040031625 DLC coating for earth-boring bit bearings |
| 02/19/2004 | US20040031624 DLC coating for earth-boring bit seal ring |
| 02/19/2004 | DE10236483A1 Hartstoffeinsatz mit polykristalliner Diamantschicht Hard material insert with polycrystalline diamond layer |
| 02/18/2004 | EP1389666A2 Force-balanced roller-cone bits, systems, drilling methods, and design methods |
| 02/18/2004 | CN1476511A Drill bit |
| 02/18/2004 | CN1475634A Slip casting striring bottom expanding drill rod central pumping concrete piling method and its device |
| 02/17/2004 | US6692690 Cemented carbide body with improved high temperature and thermomechanical properties |
| 02/17/2004 | US6691804 Directional borehole drilling system and method |
| 02/17/2004 | US6691803 Drill bit assembly having pivotal cutter blades |
| 02/17/2004 | CA2278792C Method and apparatus for enhancing production from a wellbore hole |
| 02/12/2004 | WO2004013450A1 Drill, in particular masonry drill |
| 02/12/2004 | WO2004013449A2 Device for advancing drillings in the ground |
| 02/12/2004 | US20040026126 Method for drilling with casing |
| 02/12/2004 | US20040026124 One cone bit with interchangeable cutting structures, a box-end connection, and integral sensory devices |
| 02/12/2004 | DE10238082B3 Device used in the production of bored pile comprises a continuous screw having a screw surface with increased surface roughness facing in the conveying direction and extending over the screw length necessary for conveying material |
| 02/12/2004 | DE10234338A1 Tunnelling machine has cutting head rotates about journal axis with outer margin translating to a facing peripheral zone |
| 02/12/2004 | DE10234337A1 Tunnelling machine has cutting head linked to drive shaft via an array of conical gears protected by a flexible seal |
| 02/12/2004 | DE10234336A1 Tunnelling machine has cutting head consisting of a number of tools which are assembled to and detachable from a bearing block |
| 02/12/2004 | DE10219759B3 Pfahlfuß-Schneidvorrichtung Pile base-cutter |
| 02/11/2004 | EP1388641A1 Hard insert with PDC layer |
| 02/11/2004 | EP1387923A2 Drill bit |
| 02/11/2004 | CN1474792A Polycrystalline diamond with surface depleted of catalyzing material |
| 02/11/2004 | CN1474791A High volume density polycrystalline diamond with working surfaces depleted of catalyzing material |
| 02/11/2004 | CN1474029A Multiple crystal diamond cutter of increased anti-impact property |
| 02/10/2004 | US6688410 Hydro-lifter rock bit with PDC inserts |
| 02/10/2004 | CA2207797C Method and apparatus for conditioning fluid flow |
| 02/08/2004 | CA2436181A1 Hard material insert with polycrystalline diamond layer |
| 02/05/2004 | US20040020693 Drill bit |
| 02/05/2004 | DE10144973B4 Flügelräumer, Verfahren zum Bohren mit einem Flügelräumer und seine Verwendung Winged reamer, method of drilling with a winged reamer and its use |
| 02/04/2004 | EP1386684A1 Cutting insert for drill bit and drill bit using it |
| 02/04/2004 | EP1385662A1 Abrasive tool inserts and their production |
| 02/04/2004 | CN1472397A Constructing technology for pile core |
| 02/03/2004 | US6684967 Side cutting gage pad improving stabilization and borehole integrity |
| 02/03/2004 | US6684966 PCD face seal for earth-boring bit |
| 01/29/2004 | US20040016557 Coarse carbide substrate cutting elements and method of forming the same |
| 01/27/2004 | US6681871 Auger tool for boring |
| 01/22/2004 | WO2004007901A1 Cutting tools with two-slope profile |
| 01/22/2004 | WO2004007900A1 Underreamer and actuator therefor |
| 01/22/2004 | US20040011567 Method for designing cutting structure for roller cone drill bits |
| 01/22/2004 | US20040011565 Quick release drill bit for down-hole drills |
| 01/22/2004 | US20040011560 Actuator underreamer |
| 01/22/2004 | US20040011159 Methods for designing rotary drill bits exhibiting sequences of substantially continuously variable cutter backrake angles |
| 01/22/2004 | DE10230450A1 Bohrkopf für das Horizontalbohren sowie Herstellungsverfahren für einen Bohrkopf Drill head for horizontal drilling and production method for a drill head |
| 01/21/2004 | EP1382409A1 Concrete drill bit |
| 01/21/2004 | CN1469964A A drilling tool used in horizontal drilling applications |
| 01/21/2004 | CN1468679A Blade of drilling bit and boring tool using the same blade |
| 01/20/2004 | US6679342 Dual-seal drill bit pressure communication system |
| 01/20/2004 | US6679328 Reverse section milling method and apparatus |
| 01/20/2004 | US6679243 Brazed diamond tools and methods for making |
| 01/20/2004 | CA2217661C Composite rock bit seal |
| 01/15/2004 | US20040009376 Polycrystalline diamond compact |